diff options
Diffstat (limited to 'arch/blackfin/kernel')
34 files changed, 1386 insertions, 1389 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile index a8ddbc8ed5af..346a421f1562 100644 --- a/arch/blackfin/kernel/Makefile +++ b/arch/blackfin/kernel/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_CPLB_INFO) += cplbinfo.o obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_KGDB) += kgdb.o obj-$(CONFIG_KGDB_TESTS) += kgdb_test.o +obj-$(CONFIG_NMI_WATCHDOG) += nmi.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_EARLY_PRINTK) += shadow_console.o obj-$(CONFIG_STACKTRACE) += stacktrace.o diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c index f05d1b99b0ef..bd32c09b9349 100644 --- a/arch/blackfin/kernel/asm-offsets.c +++ b/arch/blackfin/kernel/asm-offsets.c @@ -1,30 +1,9 @@ /* - * File: arch/blackfin/kernel/asm-offsets.c - * Based on: - * Author: + * generate definitions needed by assembly language modules * - * Created: - * Description: generate definitions needed by assembly language modules. + * Copyright 2004-2009 Analog Devices Inc. * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/stddef.h> diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 384868dedac3..26403d1c9e65 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -2,6 +2,7 @@ * bfin_dma_5xx.c - Blackfin DMA implementation * * Copyright 2004-2008 Analog Devices Inc. + * * Licensed under the GPL-2 or later. */ @@ -36,9 +37,8 @@ static int __init blackfin_dma_init(void) printk(KERN_INFO "Blackfin DMA Controller\n"); for (i = 0; i < MAX_DMA_CHANNELS; i++) { - dma_ch[i].chan_status = DMA_CHANNEL_FREE; + atomic_set(&dma_ch[i].chan_status, 0); dma_ch[i].regs = dma_io_base_addr[i]; - mutex_init(&(dma_ch[i].dmalock)); } /* Mark MEMDMA Channel 0 as requested since we're using it internally */ request_dma(CH_MEM_STREAM0_DEST, "Blackfin dma_memcpy"); @@ -59,7 +59,7 @@ static int proc_dma_show(struct seq_file *m, void *v) int i; for (i = 0; i < MAX_DMA_CHANNELS; ++i) - if (dma_ch[i].chan_status != DMA_CHANNEL_FREE) + if (dma_channel_active(i)) seq_printf(m, "%2d: %s\n", i, dma_ch[i].device_id); return 0; @@ -91,7 +91,7 @@ late_initcall(proc_dma_init); */ int request_dma(unsigned int channel, const char *device_id) { - pr_debug("request_dma() : BEGIN \n"); + pr_debug("request_dma() : BEGIN\n"); if (device_id == NULL) printk(KERN_WARNING "request_dma(%u): no device_id given\n", channel); @@ -106,20 +106,11 @@ int request_dma(unsigned int channel, const char *device_id) } #endif - mutex_lock(&(dma_ch[channel].dmalock)); - - if ((dma_ch[channel].chan_status == DMA_CHANNEL_REQUESTED) - || (dma_ch[channel].chan_status == DMA_CHANNEL_ENABLED)) { - mutex_unlock(&(dma_ch[channel].dmalock)); - pr_debug("DMA CHANNEL IN USE \n"); + if (atomic_cmpxchg(&dma_ch[channel].chan_status, 0, 1)) { + pr_debug("DMA CHANNEL IN USE\n"); return -EBUSY; - } else { - dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED; - pr_debug("DMA CHANNEL IS ALLOCATED \n"); } - mutex_unlock(&(dma_ch[channel].dmalock)); - #ifdef CONFIG_BF54x if (channel >= CH_UART2_RX && channel <= CH_UART3_TX) { unsigned int per_map; @@ -140,28 +131,27 @@ int request_dma(unsigned int channel, const char *device_id) * you have to request DMA, before doing any operations on * descriptor/channel */ - pr_debug("request_dma() : END \n"); + pr_debug("request_dma() : END\n"); return 0; } EXPORT_SYMBOL(request_dma); int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data) { - BUG_ON(channel >= MAX_DMA_CHANNELS || - dma_ch[channel].chan_status == DMA_CHANNEL_FREE); + int ret; + unsigned int irq; - if (callback != NULL) { - int ret; - unsigned int irq = channel2irq(channel); + BUG_ON(channel >= MAX_DMA_CHANNELS || !callback || + !atomic_read(&dma_ch[channel].chan_status)); - ret = request_irq(irq, callback, IRQF_DISABLED, - dma_ch[channel].device_id, data); - if (ret) - return ret; + irq = channel2irq(channel); + ret = request_irq(irq, callback, 0, dma_ch[channel].device_id, data); + if (ret) + return ret; + + dma_ch[channel].irq = irq; + dma_ch[channel].data = data; - dma_ch[channel].irq = irq; - dma_ch[channel].data = data; - } return 0; } EXPORT_SYMBOL(set_dma_callback); @@ -181,9 +171,9 @@ static void clear_dma_buffer(unsigned int channel) void free_dma(unsigned int channel) { - pr_debug("freedma() : BEGIN \n"); + pr_debug("freedma() : BEGIN\n"); BUG_ON(channel >= MAX_DMA_CHANNELS || - dma_ch[channel].chan_status == DMA_CHANNEL_FREE); + !atomic_read(&dma_ch[channel].chan_status)); /* Halt the DMA */ disable_dma(channel); @@ -193,11 +183,9 @@ void free_dma(unsigned int channel) free_irq(dma_ch[channel].irq, dma_ch[channel].data); /* Clear the DMA Variable in the Channel */ - mutex_lock(&(dma_ch[channel].dmalock)); - dma_ch[channel].chan_status = DMA_CHANNEL_FREE; - mutex_unlock(&(dma_ch[channel].dmalock)); + atomic_set(&dma_ch[channel].chan_status, 0); - pr_debug("freedma() : END \n"); + pr_debug("freedma() : END\n"); } EXPORT_SYMBOL(free_dma); @@ -209,13 +197,14 @@ int blackfin_dma_suspend(void) { int i; - for (i = 0; i < MAX_DMA_SUSPEND_CHANNELS; ++i) { - if (dma_ch[i].chan_status == DMA_CHANNEL_ENABLED) { + for (i = 0; i < MAX_DMA_CHANNELS; ++i) { + if (dma_ch[i].regs->cfg & DMAEN) { printk(KERN_ERR "DMA Channel %d failed to suspend\n", i); return -EBUSY; } - dma_ch[i].saved_peripheral_map = dma_ch[i].regs->peripheral_map; + if (i < MAX_DMA_SUSPEND_CHANNELS) + dma_ch[i].saved_peripheral_map = dma_ch[i].regs->peripheral_map; } return 0; @@ -224,8 +213,13 @@ int blackfin_dma_suspend(void) void blackfin_dma_resume(void) { int i; - for (i = 0; i < MAX_DMA_SUSPEND_CHANNELS; ++i) - dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map; + + for (i = 0; i < MAX_DMA_CHANNELS; ++i) { + dma_ch[i].regs->cfg = 0; + + if (i < MAX_DMA_SUSPEND_CHANNELS) + dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map; + } } #endif diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index fc4681c0170e..e35e20f00d9b 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -1,30 +1,9 @@ /* - * File: arch/blackfin/kernel/bfin_gpio.c - * Based on: - * Author: Michael Hennerich (hennerich@blackfin.uclinux.org) + * GPIO Abstraction Layer * - * Created: - * Description: GPIO Abstraction Layer + * Copyright 2006-2009 Analog Devices Inc. * - * Modified: - * Copyright 2008 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/delay.h> @@ -121,6 +100,12 @@ u8 pmux_offset[][16] = { }; # endif +#elif defined(BF538_FAMILY) +static unsigned short * const port_fer[] = { + (unsigned short *) PORTCIO_FER, + (unsigned short *) PORTDIO_FER, + (unsigned short *) PORTEIO_FER, +}; #endif static unsigned short reserved_gpio_map[GPIO_BANK_NUM]; @@ -184,6 +169,27 @@ static int cmp_label(unsigned short ident, const char *label) static void port_setup(unsigned gpio, unsigned short usage) { +#if defined(BF538_FAMILY) + /* + * BF538/9 Port C,D and E are special. + * Inverted PORT_FER polarity on CDE and no PORF_FER on F + * Regular PORT F GPIOs are handled here, CDE are exclusively + * managed by GPIOLIB + */ + + if (gpio < MAX_BLACKFIN_GPIOS || gpio >= MAX_RESOURCES) + return; + + gpio -= MAX_BLACKFIN_GPIOS; + + if (usage == GPIO_USAGE) + *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); + else + *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); + SSYNC(); + return; +#endif + if (check_gpio(gpio)) return; @@ -783,6 +789,8 @@ int peripheral_request(unsigned short per, const char *label) if (!(per & P_DEFINED)) return -ENODEV; + BUG_ON(ident >= MAX_RESOURCES); + local_irq_save_hw(flags); /* If a pin can be muxed as either GPIO or peripheral, make @@ -1000,6 +1008,76 @@ void bfin_gpio_free(unsigned gpio) } EXPORT_SYMBOL(bfin_gpio_free); +#ifdef BFIN_SPECIAL_GPIO_BANKS +static unsigned short reserved_special_gpio_map[gpio_bank(MAX_RESOURCES)]; + +int bfin_special_gpio_request(unsigned gpio, const char *label) +{ + unsigned long flags; + + local_irq_save_hw(flags); + + /* + * Allow that the identical GPIO can + * be requested from the same driver twice + * Do nothing and return - + */ + + if (cmp_label(gpio, label) == 0) { + local_irq_restore_hw(flags); + return 0; + } + + if (unlikely(reserved_special_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + local_irq_restore_hw(flags); + printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", + gpio, get_label(gpio)); + + return -EBUSY; + } + if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + local_irq_restore_hw(flags); + printk(KERN_ERR + "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", + gpio, get_label(gpio)); + + return -EBUSY; + } + + reserved_special_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio); + reserved_peri_map[gpio_bank(gpio)] |= gpio_bit(gpio); + + set_label(gpio, label); + local_irq_restore_hw(flags); + port_setup(gpio, GPIO_USAGE); + + return 0; +} +EXPORT_SYMBOL(bfin_special_gpio_request); + +void bfin_special_gpio_free(unsigned gpio) +{ + unsigned long flags; + + might_sleep(); + + local_irq_save_hw(flags); + + if (unlikely(!(reserved_special_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) { + gpio_error(gpio); + local_irq_restore_hw(flags); + return; + } + + reserved_special_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); + reserved_peri_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); + set_label(gpio, "free"); + local_irq_restore_hw(flags); +} +EXPORT_SYMBOL(bfin_special_gpio_free); +#endif + + int bfin_gpio_irq_request(unsigned gpio, const char *label) { unsigned long flags; @@ -1211,44 +1289,50 @@ __initcall(gpio_register_proc); #endif #ifdef CONFIG_GPIOLIB -int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio) +static int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio) { return bfin_gpio_direction_input(gpio); } -int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level) +static int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level) { return bfin_gpio_direction_output(gpio, level); } -int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio) +static int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio) { return bfin_gpio_get_value(gpio); } -void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value) +static void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value) { return bfin_gpio_set_value(gpio, value); } -int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio) +static int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio) { return bfin_gpio_request(gpio, chip->label); } -void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio) +static void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio) { return bfin_gpio_free(gpio); } +static int bfin_gpiolib_gpio_to_irq(struct gpio_chip *chip, unsigned gpio) +{ + return gpio + GPIO_IRQ_BASE; +} + static struct gpio_chip bfin_chip = { - .label = "Blackfin-GPIOlib", + .label = "BFIN-GPIO", .direction_input = bfin_gpiolib_direction_input, .get = bfin_gpiolib_get_value, .direction_output = bfin_gpiolib_direction_output, .set = bfin_gpiolib_set_value, .request = bfin_gpiolib_gpio_request, .free = bfin_gpiolib_gpio_free, + .to_irq = bfin_gpiolib_gpio_to_irq, .base = 0, .ngpio = MAX_BLACKFIN_GPIOS, }; diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c index 36193eed9a1f..30fd6417f069 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c @@ -1,25 +1,11 @@ /* * Blackfin CPLB initialization * - * Copyright 2004-2007 Analog Devices Inc. + * Copyright 2008-2009 Analog Devices Inc. * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later. */ + #include <linux/module.h> #include <asm/blackfin.h> @@ -52,7 +38,7 @@ void __init generate_cplb_tables_cpu(unsigned int cpu) #ifdef CONFIG_BFIN_EXTMEM_DCACHEABLE d_cache = CPLB_L1_CHBL; -#ifdef CONFIG_BFIN_EXTMEM_WRITETROUGH +#ifdef CONFIG_BFIN_EXTMEM_WRITETHROUGH d_cache |= CPLB_L1_AOW | CPLB_WT; #endif #endif @@ -78,6 +64,15 @@ void __init generate_cplb_tables_cpu(unsigned int cpu) icplb_tbl[cpu][i_i++].data = i_data | (addr == 0 ? CPLB_USER_RD : 0); } +#ifdef CONFIG_ROMKERNEL + /* Cover kernel XIP flash area */ + addr = CONFIG_ROM_BASE & ~(4 * 1024 * 1024 - 1); + dcplb_tbl[cpu][i_d].addr = addr; + dcplb_tbl[cpu][i_d++].data = d_data | CPLB_USER_RD; + icplb_tbl[cpu][i_i].addr = addr; + icplb_tbl[cpu][i_i++].data = i_data | CPLB_USER_RD; +#endif + /* Cover L1 memory. One 4M area for code and data each is enough. */ #if L1_DATA_A_LENGTH > 0 || L1_DATA_B_LENGTH > 0 dcplb_tbl[cpu][i_d].addr = get_l1_data_a_start_cpu(cpu); @@ -106,6 +101,6 @@ void __init generate_cplb_tables_cpu(unsigned int cpu) icplb_tbl[cpu][i_i++].data = 0; } -void generate_cplb_tables_all(void) +void __init generate_cplb_tables_all(void) { } diff --git a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c index 8e1e9e9e9632..87b25b1b30ed 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c @@ -1,22 +1,11 @@ /* - * Blackfin CPLB exception handling. - * Copyright 2004-2007 Analog Devices Inc. + * Blackfin CPLB exception handling for when MPU in on * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * Copyright 2008-2009 Analog Devices Inc. * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later. */ + #include <linux/module.h> #include <linux/mm.h> @@ -42,6 +31,12 @@ int nr_dcplb_miss[NR_CPUS], nr_icplb_miss[NR_CPUS]; int nr_icplb_supv_miss[NR_CPUS], nr_dcplb_prot[NR_CPUS]; int nr_cplb_flush[NR_CPUS]; +#ifdef CONFIG_EXCPT_IRQ_SYSC_L1 +#define MGR_ATTR __attribute__((l1_text)) +#else +#define MGR_ATTR +#endif + /* * Given the contents of the status register, return the index of the * CPLB that caused the fault. @@ -70,7 +65,7 @@ static int icplb_rr_index[NR_CPUS], dcplb_rr_index[NR_CPUS]; /* * Find an ICPLB entry to be evicted and return its index. */ -static int evict_one_icplb(unsigned int cpu) +MGR_ATTR static int evict_one_icplb(unsigned int cpu) { int i; for (i = first_switched_icplb; i < MAX_CPLBS; i++) @@ -85,7 +80,7 @@ static int evict_one_icplb(unsigned int cpu) return i; } -static int evict_one_dcplb(unsigned int cpu) +MGR_ATTR static int evict_one_dcplb(unsigned int cpu) { int i; for (i = first_switched_dcplb; i < MAX_CPLBS; i++) @@ -100,7 +95,7 @@ static int evict_one_dcplb(unsigned int cpu) return i; } -static noinline int dcplb_miss(unsigned int cpu) +MGR_ATTR static noinline int dcplb_miss(unsigned int cpu) { unsigned long addr = bfin_read_DCPLB_FAULT_ADDR(); int status = bfin_read_DCPLB_STATUS(); @@ -124,11 +119,16 @@ static noinline int dcplb_miss(unsigned int cpu) addr = L2_START; d_data = L2_DMEMORY; } else if (addr >= physical_mem_end) { - if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE - && (status & FAULT_USERSUPV)) { - addr &= ~0x3fffff; - d_data &= ~PAGE_SIZE_4KB; - d_data |= PAGE_SIZE_4MB; + if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) { + mask = current_rwx_mask[cpu]; + if (mask) { + int page = (addr - (ASYNC_BANK0_BASE - _ramend)) >> PAGE_SHIFT; + int idx = page >> 5; + int bit = 1 << (page & 31); + + if (mask[idx] & bit) + d_data |= CPLB_USER_RD; + } } else if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH && (status & (FAULT_RW | FAULT_USERSUPV)) == FAULT_USERSUPV) { addr &= ~(1 * 1024 * 1024 - 1); @@ -137,7 +137,9 @@ static noinline int dcplb_miss(unsigned int cpu) } else return CPLB_PROT_VIOL; } else if (addr >= _ramend) { - d_data |= CPLB_USER_RD | CPLB_USER_WR; + d_data |= CPLB_USER_RD | CPLB_USER_WR; + if (reserved_mem_dcache_on) + d_data |= CPLB_L1_CHBL; } else { mask = current_rwx_mask[cpu]; if (mask) { @@ -167,7 +169,7 @@ static noinline int dcplb_miss(unsigned int cpu) return 0; } -static noinline int icplb_miss(unsigned int cpu) +MGR_ATTR static noinline int icplb_miss(unsigned int cpu) { unsigned long addr = bfin_read_ICPLB_FAULT_ADDR(); int status = bfin_read_ICPLB_STATUS(); @@ -214,7 +216,21 @@ static noinline int icplb_miss(unsigned int cpu) addr = L2_START; i_data = L2_IMEMORY; } else if (addr >= physical_mem_end) { - if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH + if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) { + if (!(status & FAULT_USERSUPV)) { + unsigned long *mask = current_rwx_mask[cpu]; + + if (mask) { + int page = (addr - (ASYNC_BANK0_BASE - _ramend)) >> PAGE_SHIFT; + int idx = page >> 5; + int bit = 1 << (page & 31); + + mask += 2 * page_mask_nelts; + if (mask[idx] & bit) + i_data |= CPLB_USER_RD; + } + } + } else if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH && (status & FAULT_USERSUPV)) { addr &= ~(1 * 1024 * 1024 - 1); i_data &= ~PAGE_SIZE_4KB; @@ -223,6 +239,8 @@ static noinline int icplb_miss(unsigned int cpu) return CPLB_PROT_VIOL; } else if (addr >= _ramend) { i_data |= CPLB_USER_RD; + if (reserved_mem_icache_on) + i_data |= CPLB_L1_CHBL; } else { /* * Two cases to distinguish - a supervisor access must @@ -257,7 +275,7 @@ static noinline int icplb_miss(unsigned int cpu) return 0; } -static noinline int dcplb_protection_fault(unsigned int cpu) +MGR_ATTR static noinline int dcplb_protection_fault(unsigned int cpu) { int status = bfin_read_DCPLB_STATUS(); @@ -277,7 +295,7 @@ static noinline int dcplb_protection_fault(unsigned int cpu) return CPLB_PROT_VIOL; } -int cplb_hdr(int seqstat, struct pt_regs *regs) +MGR_ATTR int cplb_hdr(int seqstat, struct pt_regs *regs) { int cause = seqstat & 0x3f; unsigned int cpu = raw_smp_processor_id(); diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c index 5d8ad503f82a..bfe75af4e8bd 100644 --- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c @@ -1,24 +1,9 @@ /* * Blackfin CPLB initialization * - * Copyright 2004-2007 Analog Devices Inc. + * Copyright 2007-2009 Analog Devices Inc. * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later. */ #include <linux/module.h> @@ -71,6 +56,15 @@ void __init generate_cplb_tables_cpu(unsigned int cpu) i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB; } +#ifdef CONFIG_ROMKERNEL + /* Cover kernel XIP flash area */ + addr = CONFIG_ROM_BASE & ~(4 * 1024 * 1024 - 1); + d_tbl[i_d].addr = addr; + d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB; + i_tbl[i_i].addr = addr; + i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB; +#endif + /* Cover L1 memory. One 4M area for code and data each is enough. */ if (cpu == 0) { if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) { @@ -104,15 +98,25 @@ void __init generate_cplb_tables_cpu(unsigned int cpu) void __init generate_cplb_tables_all(void) { + unsigned long uncached_end; int i_d, i_i; i_d = 0; /* Normal RAM, including MTD FS. */ #ifdef CONFIG_MTD_UCLINUX - dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size; + uncached_end = memory_mtd_start + mtd_size; #else - dcplb_bounds[i_d].eaddr = memory_end; + uncached_end = memory_end; #endif + /* + * if DMA uncached is less than 1MB, mark the 1MB chunk as uncached + * so that we don't have to use 4kB pages and cause CPLB thrashing + */ + if ((DMA_UNCACHED_REGION >= 1 * 1024 * 1024) || !DMA_UNCACHED_REGION || + ((_ramend - uncached_end) >= 1 * 1024 * 1024)) + dcplb_bounds[i_d].eaddr = uncached_end; + else + dcplb_bounds[i_d].eaddr = uncached_end & ~(1 * 1024 * 1024); dcplb_bounds[i_d++].data = SDRAM_DGENERIC; /* DMA uncached region. */ if (DMA_UNCACHED_REGION) { @@ -150,18 +154,15 @@ void __init generate_cplb_tables_all(void) i_i = 0; /* Normal RAM, including MTD FS. */ -#ifdef CONFIG_MTD_UCLINUX - icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size; -#else - icplb_bounds[i_i].eaddr = memory_end; -#endif + icplb_bounds[i_i].eaddr = uncached_end; icplb_bounds[i_i++].data = SDRAM_IGENERIC; - /* DMA uncached region. */ - if (DMA_UNCACHED_REGION) { - icplb_bounds[i_i].eaddr = _ramend; - icplb_bounds[i_i++].data = 0; - } if (_ramend != physical_mem_end) { + /* DMA uncached region. */ + if (DMA_UNCACHED_REGION) { + /* Normally this hole is caught by the async below. */ + icplb_bounds[i_i].eaddr = _ramend; + icplb_bounds[i_i++].data = 0; + } /* Reserved memory. */ icplb_bounds[i_i].eaddr = physical_mem_end; icplb_bounds[i_i++].data = (reserved_mem_icache_on ? diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c index d9ea46c6e41a..5b88861d6183 100644 --- a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c +++ b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c @@ -1,26 +1,14 @@ /* - * File: arch/blackfin/kernel/cplb-nompu-c/cplbmgr.c * Based on: arch/blackfin/kernel/cplb-mpu/cplbmgr.c * Author: Michael McTernan <mmcternan@airvana.com> * - * Created: 01Nov2008 * Description: CPLB miss handler. * * Modified: * Copyright 2008 Airvana Inc. - * Copyright 2004-2007 Analog Devices Inc. + * Copyright 2008-2009 Analog Devices Inc. * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * Licensed under the GPL-2 or later */ #include <linux/kernel.h> diff --git a/arch/blackfin/kernel/cplbinfo.c b/arch/blackfin/kernel/cplbinfo.c index 64d78300dd08..0bdaa517a501 100644 --- a/arch/blackfin/kernel/cplbinfo.c +++ b/arch/blackfin/kernel/cplbinfo.c @@ -2,6 +2,7 @@ * arch/blackfin/kernel/cplbinfo.c - display CPLB status * * Copyright 2004-2008 Analog Devices Inc. + * * Licensed under the GPL-2 or later. */ @@ -111,24 +112,21 @@ static const struct seq_operations cplbinfo_sops = { .show = cplbinfo_show, }; +#define CPLBINFO_DCPLB_FLAG 0x80000000 + static int cplbinfo_open(struct inode *inode, struct file *file) { - char buf[256], *path, *p; + struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode); + char cplb_type; unsigned int cpu; - char *s_cpu, *s_cplb; int ret; struct seq_file *m; struct cplbinfo_data *cdata; - path = d_path(&file->f_path, buf, sizeof(buf)); - if (IS_ERR(path)) - return PTR_ERR(path); - s_cpu = strstr(path, "/cpu"); - s_cplb = strrchr(path, '/'); - if (!s_cpu || !s_cplb) - return -EINVAL; + cpu = (unsigned int)pde->data; + cplb_type = cpu & CPLBINFO_DCPLB_FLAG ? 'D' : 'I'; + cpu &= ~CPLBINFO_DCPLB_FLAG; - cpu = simple_strtoul(s_cpu + 4, &p, 10); if (!cpu_online(cpu)) return -ENODEV; @@ -139,7 +137,7 @@ static int cplbinfo_open(struct inode *inode, struct file *file) cdata = m->private; cdata->pos = 0; - cdata->cplb_type = toupper(s_cplb[1]); + cdata->cplb_type = cplb_type; cplbinfo_seq_init(cdata, cpu); return 0; @@ -168,8 +166,10 @@ static int __init cplbinfo_init(void) if (!cpu_dir) return -ENOMEM; - proc_create("icplb", S_IRUGO, cpu_dir, &cplbinfo_fops); - proc_create("dcplb", S_IRUGO, cpu_dir, &cplbinfo_fops); + proc_create_data("icplb", S_IRUGO, cpu_dir, &cplbinfo_fops, + (void *)cpu); + proc_create_data("dcplb", S_IRUGO, cpu_dir, &cplbinfo_fops, + (void *)(cpu | CPLBINFO_DCPLB_FLAG)); } return 0; diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c index 2f62a9f4058a..04ddcfeb7981 100644 --- a/arch/blackfin/kernel/dma-mapping.c +++ b/arch/blackfin/kernel/dma-mapping.c @@ -1,57 +1,31 @@ /* - * File: arch/blackfin/kernel/dma-mapping.c - * Based on: - * Author: + * Dynamic DMA mapping support * - * Created: - * Description: Dynamic DMA mapping support. + * Copyright 2005-2009 Analog Devices Inc. * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/types.h> -#include <linux/mm.h> +#include <linux/gfp.h> #include <linux/string.h> -#include <linux/bootmem.h> #include <linux/spinlock.h> -#include <linux/device.h> #include <linux/dma-mapping.h> -#include <linux/io.h> #include <linux/scatterlist.h> -#include <asm/cacheflush.h> -#include <asm/bfin-global.h> static spinlock_t dma_page_lock; -static unsigned int *dma_page; +static unsigned long *dma_page; static unsigned int dma_pages; static unsigned long dma_base; static unsigned long dma_size; static unsigned int dma_initialized; -void dma_alloc_init(unsigned long start, unsigned long end) +static void dma_alloc_init(unsigned long start, unsigned long end) { spin_lock_init(&dma_page_lock); dma_initialized = 0; - dma_page = (unsigned int *)__get_free_page(GFP_KERNEL); + dma_page = (unsigned long *)__get_free_page(GFP_KERNEL); memset(dma_page, 0, PAGE_SIZE); dma_base = PAGE_ALIGN(start); dma_size = PAGE_ALIGN(end) - PAGE_ALIGN(start); @@ -79,10 +53,11 @@ static unsigned long __alloc_dma_pages(unsigned int pages) spin_lock_irqsave(&dma_page_lock, flags); for (i = 0; i < dma_pages;) { - if (dma_page[i++] == 0) { + if (test_bit(i++, dma_page) == 0) { if (++count == pages) { while (count--) - dma_page[--i] = 1; + __set_bit(--i, dma_page); + ret = dma_base + (i << PAGE_SHIFT); break; } @@ -105,14 +80,14 @@ static void __free_dma_pages(unsigned long addr, unsigned int pages) } spin_lock_irqsave(&dma_page_lock, flags); - for (i = page; i < page + pages; i++) { - dma_page[i] = 0; - } + for (i = page; i < page + pages; i++) + __clear_bit(i, dma_page); + spin_unlock_irqrestore(&dma_page_lock, flags); } void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t * dma_handle, gfp_t gfp) + dma_addr_t *dma_handle, gfp_t gfp) { void *ret; @@ -136,21 +111,14 @@ dma_free_coherent(struct device *dev, size_t size, void *vaddr, EXPORT_SYMBOL(dma_free_coherent); /* - * Dummy functions defined for some existing drivers + * Streaming DMA mappings */ - -dma_addr_t -dma_map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction direction) +void __dma_sync(dma_addr_t addr, size_t size, + enum dma_data_direction dir) { - BUG_ON(direction == DMA_NONE); - - invalidate_dcache_range((unsigned long)ptr, - (unsigned long)ptr + size); - - return (dma_addr_t) ptr; + __dma_sync_inline(addr, size, dir); } -EXPORT_SYMBOL(dma_map_single); +EXPORT_SYMBOL(__dma_sync); int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, @@ -158,30 +126,23 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, { int i; - BUG_ON(direction == DMA_NONE); - for (i = 0; i < nents; i++, sg++) { sg->dma_address = (dma_addr_t) sg_virt(sg); - - invalidate_dcache_range(sg_dma_address(sg), - sg_dma_address(sg) + - sg_dma_len(sg)); + __dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction); } return nents; } EXPORT_SYMBOL(dma_map_sg); -void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction direction) +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction direction) { - BUG_ON(direction == DMA_NONE); -} -EXPORT_SYMBOL(dma_unmap_single); + int i; -void dma_unmap_sg(struct device *dev, struct scatterlist *sg, - int nhwentries, enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); + for (i = 0; i < nelems; i++, sg++) { + sg->dma_address = (dma_addr_t) sg_virt(sg); + __dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction); + } } -EXPORT_SYMBOL(dma_unmap_sg); +EXPORT_SYMBOL(dma_sync_sg_for_device); diff --git a/arch/blackfin/kernel/early_printk.c b/arch/blackfin/kernel/early_printk.c index 931c78b5ea1f..84ed8375113c 100644 --- a/arch/blackfin/kernel/early_printk.c +++ b/arch/blackfin/kernel/early_printk.c @@ -1,25 +1,10 @@ /* - * File: arch/blackfin/kernel/early_printk.c - * Based on: arch/x86_64/kernel/early_printk.c - * Author: Robin Getz <rgetz@blackfin.uclinux.org + * allow a console to be used for early printk + * derived from arch/x86/kernel/early_printk.c * - * Created: 14Aug2007 - * Description: allow a console to be used for early printk + * Copyright 2007-2009 Analog Devices Inc. * - * Modified: - * Copyright 2004-2007 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * Licensed under the GPL-2 */ #include <linux/kernel.h> diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S index 3f8769b7db54..686478f5f66b 100644 --- a/arch/blackfin/kernel/entry.S +++ b/arch/blackfin/kernel/entry.S @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/kernel/entry.S - * Based on: - * Author: + * Copyright 2004-2009 Analog Devices Inc. * - * Created: - * Description: - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/linkage.h> @@ -67,7 +44,7 @@ ENTRY(_ret_from_fork) sti r4; #endif /* CONFIG_IPIPE */ SP += -12; - call _schedule_tail; + pseudo_long_call _schedule_tail, p5; SP += 12; r0 = [sp + PT_IPEND]; cc = bittst(r0,1); @@ -102,7 +79,7 @@ ENTRY(_sys_vfork) r0 += 24; [--sp] = rets; SP += -12; - call _bfin_vfork; + pseudo_long_call _bfin_vfork, p2; SP += 12; rets = [sp++]; rts; @@ -113,7 +90,7 @@ ENTRY(_sys_clone) r0 += 24; [--sp] = rets; SP += -12; - call _bfin_clone; + pseudo_long_call _bfin_clone, p2; SP += 12; rets = [sp++]; rts; @@ -124,7 +101,7 @@ ENTRY(_sys_rt_sigreturn) r0 += 24; [--sp] = rets; SP += -12; - call _do_rt_sigreturn; + pseudo_long_call _do_rt_sigreturn, p2; SP += 12; rets = [sp++]; rts; diff --git a/arch/blackfin/kernel/fixed_code.S b/arch/blackfin/kernel/fixed_code.S index 0d2d9e0968c8..0565917f23ba 100644 --- a/arch/blackfin/kernel/fixed_code.S +++ b/arch/blackfin/kernel/fixed_code.S @@ -6,7 +6,12 @@ * These are aligned to 16 bytes, so that we have some space to replace * these sequences with something else (e.g. kernel traps if we ever do * BF561 SMP). + * + * Copyright 2007-2008 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. */ + #include <linux/linkage.h> #include <linux/init.h> #include <linux/unistd.h> diff --git a/arch/blackfin/kernel/flat.c b/arch/blackfin/kernel/flat.c index d188b2430536..a88daddbf074 100644 --- a/arch/blackfin/kernel/flat.c +++ b/arch/blackfin/kernel/flat.c @@ -1,21 +1,7 @@ /* - * arch/blackfin/kernel/flat.c + * Copyright 2007 Analog Devices Inc. * - * Copyright (C) 2007 Analog Devices, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * Licensed under the GPL-2. */ #include <linux/module.h> diff --git a/arch/blackfin/kernel/ftrace-entry.S b/arch/blackfin/kernel/ftrace-entry.S index 76dd4fbcd17a..d66446b572c0 100644 --- a/arch/blackfin/kernel/ftrace-entry.S +++ b/arch/blackfin/kernel/ftrace-entry.S @@ -1,7 +1,7 @@ /* * mcount and friends -- ftrace stuff * - * Copyright (C) 2009 Analog Devices Inc. + * Copyright (C) 2009-2010 Analog Devices Inc. * Licensed under the GPL-2 or later. */ @@ -21,6 +21,15 @@ * function will be waiting there. mmmm pie. */ ENTRY(__mcount) +#ifdef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST + /* optional micro optimization: return if stopped */ + p1.l = _function_trace_stop; + p1.h = _function_trace_stop; + r3 = [p1]; + cc = r3 == 0; + if ! cc jump _ftrace_stub (bp); +#endif + /* save third function arg early so we can do testing below */ [--sp] = r2; @@ -106,9 +115,12 @@ ENTRY(_ftrace_graph_caller) [--sp] = r1; [--sp] = rets; - /* prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) */ - r0 = sp; - r1 = rets; + /* prepare_ftrace_return(parent, self_addr, frame_pointer) */ + r0 = sp; /* unsigned long *parent */ + r1 = rets; /* unsigned long self_addr */ +#ifdef CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST + r2 = fp; /* unsigned long frame_pointer */ +#endif r0 += 16; /* skip the 4 local regs on stack */ r1 += -MCOUNT_INSN_SIZE; call _prepare_ftrace_return; @@ -127,6 +139,9 @@ ENTRY(_return_to_handler) [--sp] = r1; /* get original return address */ +#ifdef CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST + r0 = fp; /* Blackfin is sane, so omit this */ +#endif call _ftrace_return_to_handler; rets = r0; diff --git a/arch/blackfin/kernel/ftrace.c b/arch/blackfin/kernel/ftrace.c index f2c85ac6f2da..a61d948ea925 100644 --- a/arch/blackfin/kernel/ftrace.c +++ b/arch/blackfin/kernel/ftrace.c @@ -16,7 +16,8 @@ * Hook the return address and push it in the stack of return addrs * in current thread info. */ -void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) +void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, + unsigned long frame_pointer) { struct ftrace_graph_ent trace; unsigned long return_hooker = (unsigned long)&return_to_handler; @@ -24,7 +25,8 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; - if (ftrace_push_return_trace(*parent, self_addr, &trace.depth, 0) == -EBUSY) + if (ftrace_push_return_trace(*parent, self_addr, &trace.depth, + frame_pointer) == -EBUSY) return; trace.func = self_addr; diff --git a/arch/blackfin/kernel/gptimers.c b/arch/blackfin/kernel/gptimers.c index 7281a91d26b5..cdbe075de1dc 100644 --- a/arch/blackfin/kernel/gptimers.c +++ b/arch/blackfin/kernel/gptimers.c @@ -137,7 +137,7 @@ static uint32_t const timil_mask[MAX_BLACKFIN_GPTIMERS] = #endif }; -void set_gptimer_pwidth(int timer_id, uint32_t value) +void set_gptimer_pwidth(unsigned int timer_id, uint32_t value) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); timer_regs[timer_id]->width = value; @@ -145,14 +145,14 @@ void set_gptimer_pwidth(int timer_id, uint32_t value) } EXPORT_SYMBOL(set_gptimer_pwidth); -uint32_t get_gptimer_pwidth(int timer_id) +uint32_t get_gptimer_pwidth(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return timer_regs[timer_id]->width; } EXPORT_SYMBOL(get_gptimer_pwidth); -void set_gptimer_period(int timer_id, uint32_t period) +void set_gptimer_period(unsigned int timer_id, uint32_t period) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); timer_regs[timer_id]->period = period; @@ -160,28 +160,28 @@ void set_gptimer_period(int timer_id, uint32_t period) } EXPORT_SYMBOL(set_gptimer_period); -uint32_t get_gptimer_period(int timer_id) +uint32_t get_gptimer_period(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return timer_regs[timer_id]->period; } EXPORT_SYMBOL(get_gptimer_period); -uint32_t get_gptimer_count(int timer_id) +uint32_t get_gptimer_count(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return timer_regs[timer_id]->counter; } EXPORT_SYMBOL(get_gptimer_count); -uint32_t get_gptimer_status(int group) +uint32_t get_gptimer_status(unsigned int group) { tassert(group < BFIN_TIMER_NUM_GROUP); return group_regs[group]->status; } EXPORT_SYMBOL(get_gptimer_status); -void set_gptimer_status(int group, uint32_t value) +void set_gptimer_status(unsigned int group, uint32_t value) { tassert(group < BFIN_TIMER_NUM_GROUP); group_regs[group]->status = value; @@ -189,42 +189,42 @@ void set_gptimer_status(int group, uint32_t value) } EXPORT_SYMBOL(set_gptimer_status); -int get_gptimer_intr(int timer_id) +int get_gptimer_intr(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return !!(group_regs[BFIN_TIMER_OCTET(timer_id)]->status & timil_mask[timer_id]); } EXPORT_SYMBOL(get_gptimer_intr); -void clear_gptimer_intr(int timer_id) +void clear_gptimer_intr(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); group_regs[BFIN_TIMER_OCTET(timer_id)]->status = timil_mask[timer_id]; } EXPORT_SYMBOL(clear_gptimer_intr); -int get_gptimer_over(int timer_id) +int get_gptimer_over(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return !!(group_regs[BFIN_TIMER_OCTET(timer_id)]->status & tovf_mask[timer_id]); } EXPORT_SYMBOL(get_gptimer_over); -void clear_gptimer_over(int timer_id) +void clear_gptimer_over(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); group_regs[BFIN_TIMER_OCTET(timer_id)]->status = tovf_mask[timer_id]; } EXPORT_SYMBOL(clear_gptimer_over); -int get_gptimer_run(int timer_id) +int get_gptimer_run(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return !!(group_regs[BFIN_TIMER_OCTET(timer_id)]->status & trun_mask[timer_id]); } EXPORT_SYMBOL(get_gptimer_run); -void set_gptimer_config(int timer_id, uint16_t config) +void set_gptimer_config(unsigned int timer_id, uint16_t config) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); timer_regs[timer_id]->config = config; @@ -232,7 +232,7 @@ void set_gptimer_config(int timer_id, uint16_t config) } EXPORT_SYMBOL(set_gptimer_config); -uint16_t get_gptimer_config(int timer_id) +uint16_t get_gptimer_config(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); return timer_regs[timer_id]->config; @@ -280,7 +280,7 @@ void disable_gptimers_sync(uint16_t mask) } EXPORT_SYMBOL(disable_gptimers_sync); -void set_gptimer_pulse_hi(int timer_id) +void set_gptimer_pulse_hi(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); timer_regs[timer_id]->config |= TIMER_PULSE_HI; @@ -288,7 +288,7 @@ void set_gptimer_pulse_hi(int timer_id) } EXPORT_SYMBOL(set_gptimer_pulse_hi); -void clear_gptimer_pulse_hi(int timer_id) +void clear_gptimer_pulse_hi(unsigned int timer_id) { tassert(timer_id < MAX_BLACKFIN_GPTIMERS); timer_regs[timer_id]->config &= ~TIMER_PULSE_HI; diff --git a/arch/blackfin/kernel/init_task.c b/arch/blackfin/kernel/init_task.c index c26c34de9f3c..d3970e8acd1a 100644 --- a/arch/blackfin/kernel/init_task.c +++ b/arch/blackfin/kernel/init_task.c @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/kernel/init_task.c - * Based on: - * Author: + * Copyright 2004-2009 Analog Devices Inc. * - * Created: - * Description: This file contains the simple DMA Implementation for Blackfin - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/mm.h> @@ -51,5 +28,5 @@ EXPORT_SYMBOL(init_task); * "init_task" linker map entry. */ union thread_union init_thread_union - __attribute__ ((__section__(".init_task.data"))) = { + __init_task_data = { INIT_THREAD_INFO(init_task)}; diff --git a/arch/blackfin/kernel/ipipe.c b/arch/blackfin/kernel/ipipe.c index 5d7382396dc0..a77307a4473b 100644 --- a/arch/blackfin/kernel/ipipe.c +++ b/arch/blackfin/kernel/ipipe.c @@ -335,3 +335,70 @@ void __ipipe_enable_root_irqs_hw(void) __clear_bit(IPIPE_STALL_FLAG, &ipipe_root_cpudom_var(status)); bfin_sti(bfin_irq_flags); } + +/* + * We could use standard atomic bitops in the following root status + * manipulation routines, but let's prepare for SMP support in the + * same move, preventing CPU migration as required. + */ +void __ipipe_stall_root(void) +{ + unsigned long *p, flags; + + local_irq_save_hw(flags); + p = &__ipipe_root_status; + __set_bit(IPIPE_STALL_FLAG, p); + local_irq_restore_hw(flags); +} +EXPORT_SYMBOL(__ipipe_stall_root); + +unsigned long __ipipe_test_and_stall_root(void) +{ + unsigned long *p, flags; + int x; + + local_irq_save_hw(flags); + p = &__ipipe_root_status; + x = __test_and_set_bit(IPIPE_STALL_FLAG, p); + local_irq_restore_hw(flags); + + return x; +} +EXPORT_SYMBOL(__ipipe_test_and_stall_root); + +unsigned long __ipipe_test_root(void) +{ + const unsigned long *p; + unsigned long flags; + int x; + + local_irq_save_hw_smp(flags); + p = &__ipipe_root_status; + x = test_bit(IPIPE_STALL_FLAG, p); + local_irq_restore_hw_smp(flags); + + return x; +} +EXPORT_SYMBOL(__ipipe_test_root); + +void __ipipe_lock_root(void) +{ + unsigned long *p, flags; + + local_irq_save_hw(flags); + p = &__ipipe_root_status; + __set_bit(IPIPE_SYNCDEFER_FLAG, p); + local_irq_restore_hw(flags); +} +EXPORT_SYMBOL(__ipipe_lock_root); + +void __ipipe_unlock_root(void) +{ + unsigned long *p, flags; + + local_irq_save_hw(flags); + p = &__ipipe_root_status; + __clear_bit(IPIPE_SYNCDEFER_FLAG, p); + local_irq_restore_hw(flags); +} +EXPORT_SYMBOL(__ipipe_unlock_root); diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c index 4b5fd36187d9..64cff54a8a58 100644 --- a/arch/blackfin/kernel/irqchip.c +++ b/arch/blackfin/kernel/irqchip.c @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/kernel/irqchip.c - * Based on: - * Author: + * Copyright 2005-2009 Analog Devices Inc. * - * Created: - * Description: This file contains the simple DMA Implementation for Blackfin - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/kernel_stat.h> @@ -46,7 +23,7 @@ void ack_bad_irq(unsigned int irq) static struct irq_desc bad_irq_desc = { .handle_irq = handle_bad_irq, - .lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock), + .lock = __RAW_SPIN_LOCK_UNLOCKED(bad_irq_desc.lock), }; #ifdef CONFIG_CPUMASK_OFFSTACK @@ -62,7 +39,7 @@ int show_interrupts(struct seq_file *p, void *v) unsigned long flags; if (i < NR_IRQS) { - spin_lock_irqsave(&irq_desc[i].lock, flags); + raw_spin_lock_irqsave(&irq_desc[i].lock, flags); action = irq_desc[i].action; if (!action) goto skip; @@ -76,7 +53,7 @@ int show_interrupts(struct seq_file *p, void *v) seq_putc(p, '\n'); skip: - spin_unlock_irqrestore(&irq_desc[i].lock, flags); + raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); } else if (i == NR_IRQS) { seq_printf(p, "NMI: "); for_each_online_cpu(j) diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c index cce79d05b90b..2c501ceb1e55 100644 --- a/arch/blackfin/kernel/kgdb.c +++ b/arch/blackfin/kernel/kgdb.c @@ -6,33 +6,9 @@ * Licensed under the GPL-2 or later. */ -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/smp.h> -#include <linux/spinlock.h> -#include <linux/delay.h> #include <linux/ptrace.h> /* for linux pt_regs struct */ #include <linux/kgdb.h> -#include <linux/console.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/irq.h> #include <linux/uaccess.h> -#include <asm/system.h> -#include <asm/traps.h> -#include <asm/blackfin.h> -#include <asm/dma.h> - -/* Put the error code here just in case the user cares. */ -int gdb_bfin_errcode; -/* Likewise, the vector number here (since GDB only gets the signal - number through the usual means, and that's not very specific). */ -int gdb_bfin_vector = -1; - -#if KGDB_MAX_NO_CPUS != 8 -#error change the definition of slavecpulocks -#endif void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) { @@ -157,7 +133,7 @@ void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) regs->lb1 = gdb_regs[BFIN_LB1]; regs->usp = gdb_regs[BFIN_USP]; regs->syscfg = gdb_regs[BFIN_SYSCFG]; - regs->retx = gdb_regs[BFIN_PC]; + regs->retx = gdb_regs[BFIN_RETX]; regs->retn = gdb_regs[BFIN_RETN]; regs->rete = gdb_regs[BFIN_RETE]; regs->pc = gdb_regs[BFIN_PC]; @@ -169,7 +145,7 @@ void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) #endif } -struct hw_breakpoint { +static struct hw_breakpoint { unsigned int occupied:1; unsigned int skip:1; unsigned int enabled:1; @@ -179,7 +155,7 @@ struct hw_breakpoint { unsigned int addr; } breakinfo[HW_WATCHPOINT_NUM]; -int bfin_set_hw_break(unsigned long addr, int len, enum kgdb_bptype type) +static int bfin_set_hw_break(unsigned long addr, int len, enum kgdb_bptype type) { int breakno; int bfin_type; @@ -226,7 +202,7 @@ int bfin_set_hw_break(unsigned long addr, int len, enum kgdb_bptype type) return -ENOSPC; } -int bfin_remove_hw_break(unsigned long addr, int len, enum kgdb_bptype type) +static int bfin_remove_hw_break(unsigned long addr, int len, enum kgdb_bptype type) { int breakno; int bfin_type; @@ -254,7 +230,7 @@ int bfin_remove_hw_break(unsigned long addr, int len, enum kgdb_bptype type) return 0; } -void bfin_remove_all_hw_break(void) +static void bfin_remove_all_hw_break(void) { int breakno; @@ -266,7 +242,7 @@ void bfin_remove_all_hw_break(void) breakinfo[breakno].type = TYPE_DATA_WATCHPOINT; } -void bfin_correct_hw_break(void) +static void bfin_correct_hw_break(void) { int breakno; unsigned int wpiactl = 0; @@ -369,13 +345,6 @@ void kgdb_roundup_cpu(int cpu, unsigned long flags) } #endif -void kgdb_post_primary_code(struct pt_regs *regs, int eVector, int err_code) -{ - /* Master processor is completely in the debugger */ - gdb_bfin_vector = eVector; - gdb_bfin_errcode = err_code; -} - int kgdb_arch_handle_exception(int vector, int signo, int err_code, char *remcom_in_buffer, char *remcom_out_buffer, @@ -441,182 +410,6 @@ struct kgdb_arch arch_kgdb_ops = { .correct_hw_break = bfin_correct_hw_break, }; -static int hex(char ch) -{ - if ((ch >= 'a') && (ch <= 'f')) - return ch - 'a' + 10; - if ((ch >= '0') && (ch <= '9')) - return ch - '0'; - if ((ch >= 'A') && (ch <= 'F')) - return ch - 'A' + 10; - return -1; -} - -static int validate_memory_access_address(unsigned long addr, int size) -{ - if (size < 0 || addr == 0) - return -EFAULT; - return bfin_mem_access_type(addr, size); -} - -static int bfin_probe_kernel_read(char *dst, char *src, int size) -{ - unsigned long lsrc = (unsigned long)src; - int mem_type; - - mem_type = validate_memory_access_address(lsrc, size); - if (mem_type < 0) - return mem_type; - - if (lsrc >= SYSMMR_BASE) { - if (size == 2 && lsrc % 2 == 0) { - u16 mmr = bfin_read16(src); - memcpy(dst, &mmr, sizeof(mmr)); - return 0; - } else if (size == 4 && lsrc % 4 == 0) { - u32 mmr = bfin_read32(src); - memcpy(dst, &mmr, sizeof(mmr)); - return 0; - } - } else { - switch (mem_type) { - case BFIN_MEM_ACCESS_CORE: - case BFIN_MEM_ACCESS_CORE_ONLY: - return probe_kernel_read(dst, src, size); - /* XXX: should support IDMA here with SMP */ - case BFIN_MEM_ACCESS_DMA: - if (dma_memcpy(dst, src, size)) - return 0; - break; - case BFIN_MEM_ACCESS_ITEST: - if (isram_memcpy(dst, src, size)) - return 0; - break; - } - } - - return -EFAULT; -} - -static int bfin_probe_kernel_write(char *dst, char *src, int size) -{ - unsigned long ldst = (unsigned long)dst; - int mem_type; - - mem_type = validate_memory_access_address(ldst, size); - if (mem_type < 0) - return mem_type; - - if (ldst >= SYSMMR_BASE) { - if (size == 2 && ldst % 2 == 0) { - u16 mmr; - memcpy(&mmr, src, sizeof(mmr)); - bfin_write16(dst, mmr); - return 0; - } else if (size == 4 && ldst % 4 == 0) { - u32 mmr; - memcpy(&mmr, src, sizeof(mmr)); - bfin_write32(dst, mmr); - return 0; - } - } else { - switch (mem_type) { - case BFIN_MEM_ACCESS_CORE: - case BFIN_MEM_ACCESS_CORE_ONLY: - return probe_kernel_write(dst, src, size); - /* XXX: should support IDMA here with SMP */ - case BFIN_MEM_ACCESS_DMA: - if (dma_memcpy(dst, src, size)) - return 0; - break; - case BFIN_MEM_ACCESS_ITEST: - if (isram_memcpy(dst, src, size)) - return 0; - break; - } - } - - return -EFAULT; -} - -/* - * Convert the memory pointed to by mem into hex, placing result in buf. - * Return a pointer to the last char put in buf (null). May return an error. - */ -int kgdb_mem2hex(char *mem, char *buf, int count) -{ - char *tmp; - int err; - - /* - * We use the upper half of buf as an intermediate buffer for the - * raw memory copy. Hex conversion will work against this one. - */ - tmp = buf + count; - - err = bfin_probe_kernel_read(tmp, mem, count); - if (!err) { - while (count > 0) { - buf = pack_hex_byte(buf, *tmp); - tmp++; - count--; - } - - *buf = 0; - } - - return err; -} - -/* - * Copy the binary array pointed to by buf into mem. Fix $, #, and - * 0x7d escaped with 0x7d. Return a pointer to the character after - * the last byte written. - */ -int kgdb_ebin2mem(char *buf, char *mem, int count) -{ - char *tmp_old, *tmp_new; - int size; - - tmp_old = tmp_new = buf; - - for (size = 0; size < count; ++size) { - if (*tmp_old == 0x7d) - *tmp_new = *(++tmp_old) ^ 0x20; - else - *tmp_new = *tmp_old; - tmp_new++; - tmp_old++; - } - - return bfin_probe_kernel_write(mem, buf, count); -} - -/* - * Convert the hex array pointed to by buf into binary to be placed in mem. - * Return a pointer to the character AFTER the last byte written. - * May return an error. - */ -int kgdb_hex2mem(char *buf, char *mem, int count) -{ - char *tmp_raw, *tmp_hex; - - /* - * We use the upper half of buf as an intermediate buffer for the - * raw memory that is converted from hex. - */ - tmp_raw = buf + count * 2; - - tmp_hex = tmp_raw - 1; - while (tmp_hex >= buf) { - tmp_raw--; - *tmp_raw = hex(*tmp_hex--); - *tmp_raw |= hex(*tmp_hex--) << 4; - } - - return bfin_probe_kernel_write(mem, tmp_raw, count); -} - #define IN_MEM(addr, size, l1_addr, l1_size) \ ({ \ unsigned long __addr = (unsigned long)(addr); \ @@ -646,21 +439,6 @@ int kgdb_validate_break_address(unsigned long addr) return -EFAULT; } -int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr) -{ - int err = bfin_probe_kernel_read(saved_instr, (char *)addr, - BREAK_INSTR_SIZE); - if (err) - return err; - return bfin_probe_kernel_write((char *)addr, arch_kgdb_ops.gdb_bpt_instr, - BREAK_INSTR_SIZE); -} - -int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle) -{ - return bfin_probe_kernel_write((char *)addr, bundle, BREAK_INSTR_SIZE); -} - int kgdb_arch_init(void) { kgdb_single_step = 0; diff --git a/arch/blackfin/kernel/kgdb_test.c b/arch/blackfin/kernel/kgdb_test.c index 59fc42dc5d6a..9a4b07594389 100644 --- a/arch/blackfin/kernel/kgdb_test.c +++ b/arch/blackfin/kernel/kgdb_test.c @@ -17,8 +17,9 @@ #include <asm/blackfin.h> +/* Symbols are here for kgdb test to poke directly */ static char cmdline[256]; -static unsigned long len; +static size_t len; #ifndef CONFIG_SMP static int num1 __attribute__((l1_data)); @@ -27,11 +28,10 @@ void kgdb_l1_test(void) __attribute__((l1_text)); void kgdb_l1_test(void) { - printk(KERN_ALERT "L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); - printk(KERN_ALERT "L1 : code function addr = 0x%p\n", kgdb_l1_test); - num1 = num1 + 10 ; - printk(KERN_ALERT "L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); - return ; + pr_alert("L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); + pr_alert("L1 : code function addr = 0x%p\n", kgdb_l1_test); + num1 = num1 + 10; + pr_alert("L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); } #endif @@ -42,11 +42,10 @@ void kgdb_l2_test(void) __attribute__((l2)); void kgdb_l2_test(void) { - printk(KERN_ALERT "L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); - printk(KERN_ALERT "L2 : code function addr = 0x%p\n", kgdb_l2_test); - num2 = num2 + 20 ; - printk(KERN_ALERT "L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); - return ; + pr_alert("L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); + pr_alert("L2 : code function addr = 0x%p\n", kgdb_l2_test); + num2 = num2 + 20; + pr_alert("L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); } #endif @@ -54,12 +53,14 @@ void kgdb_l2_test(void) int kgdb_test(char *name, int len, int count, int z) { - printk(KERN_ALERT "kgdb name(%d): %s, %d, %d\n", len, name, count, z); + pr_alert("kgdb name(%d): %s, %d, %d\n", len, name, count, z); count = z; return count; } -static int test_proc_output(char *buf) +static ssize_t +kgdb_test_proc_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) { kgdb_test("hello world!", 12, 0x55, 0x10); #ifndef CONFIG_SMP @@ -72,49 +73,31 @@ static int test_proc_output(char *buf) return 0; } -static int test_read_proc(char *page, char **start, off_t off, - int count, int *eof, void *data) +static ssize_t +kgdb_test_proc_write(struct file *file, const char __user *buffer, + size_t count, loff_t *pos) { - int len; - - len = test_proc_output(page); - if (len <= off+count) - *eof = 1; - *start = page + off; - len -= off; - if (len > count) - len = count; - if (len < 0) - len = 0; - return len; -} - -static int test_write_proc(struct file *file, const char *buffer, - unsigned long count, void *data) -{ - if (count >= 256) - len = 255; - else - len = count; - + len = min_t(size_t, 255, count); memcpy(cmdline, buffer, count); cmdline[len] = 0; return len; } +static const struct file_operations kgdb_test_proc_fops = { + .owner = THIS_MODULE, + .read = kgdb_test_proc_read, + .write = kgdb_test_proc_write, +}; + static int __init kgdbtest_init(void) { struct proc_dir_entry *entry; - entry = create_proc_entry("kgdbtest", 0, NULL); + entry = proc_create("kgdbtest", 0, NULL, &kgdb_test_proc_fops); if (entry == NULL) return -ENOMEM; - entry->read_proc = test_read_proc; - entry->write_proc = test_write_proc; - entry->data = NULL; - return 0; } diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c index 67fc7a56c865..a6dfa6b71e63 100644 --- a/arch/blackfin/kernel/module.c +++ b/arch/blackfin/kernel/module.c @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/kernel/module.c - * Based on: - * Author: + * Copyright 2004-2009 Analog Devices Inc. * - * Created: - * Description: - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #define pr_fmt(fmt) "module %s: " fmt diff --git a/arch/blackfin/kernel/nmi.c b/arch/blackfin/kernel/nmi.c new file mode 100644 index 000000000000..0b5f72f17fd0 --- /dev/null +++ b/arch/blackfin/kernel/nmi.c @@ -0,0 +1,299 @@ +/* + * Blackfin nmi_watchdog Driver + * + * Originally based on bfin_wdt.c + * Copyright 2010-2010 Analog Devices Inc. + * Graff Yang <graf.yang@analog.com> + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/bitops.h> +#include <linux/hardirq.h> +#include <linux/sysdev.h> +#include <linux/pm.h> +#include <linux/nmi.h> +#include <linux/smp.h> +#include <linux/timer.h> +#include <asm/blackfin.h> +#include <asm/atomic.h> +#include <asm/cacheflush.h> +#include <asm/bfin_watchdog.h> + +#define DRV_NAME "nmi-wdt" + +#define NMI_WDT_TIMEOUT 5 /* 5 seconds */ +#define NMI_CHECK_TIMEOUT (4 * HZ) /* 4 seconds in jiffies */ +static int nmi_wdt_cpu = 1; + +static unsigned int timeout = NMI_WDT_TIMEOUT; +static int nmi_active; + +static unsigned short wdoga_ctl; +static unsigned int wdoga_cnt; +static struct corelock_slot saved_corelock; +static atomic_t nmi_touched[NR_CPUS]; +static struct timer_list ntimer; + +enum { + COREA_ENTER_NMI = 0, + COREA_EXIT_NMI, + COREB_EXIT_NMI, + + NMI_EVENT_NR, +}; +static unsigned long nmi_event __attribute__ ((__section__(".l2.bss"))); + +/* we are in nmi, non-atomic bit ops is safe */ +static inline void set_nmi_event(int event) +{ + __set_bit(event, &nmi_event); +} + +static inline void wait_nmi_event(int event) +{ + while (!test_bit(event, &nmi_event)) + barrier(); + __clear_bit(event, &nmi_event); +} + +static inline void send_corea_nmi(void) +{ + wdoga_ctl = bfin_read_WDOGA_CTL(); + wdoga_cnt = bfin_read_WDOGA_CNT(); + + bfin_write_WDOGA_CTL(WDEN_DISABLE); + bfin_write_WDOGA_CNT(0); + bfin_write_WDOGA_CTL(WDEN_ENABLE | ICTL_NMI); +} + +static inline void restore_corea_nmi(void) +{ + bfin_write_WDOGA_CTL(WDEN_DISABLE); + bfin_write_WDOGA_CTL(WDOG_EXPIRED | WDEN_DISABLE | ICTL_NONE); + + bfin_write_WDOGA_CNT(wdoga_cnt); + bfin_write_WDOGA_CTL(wdoga_ctl); +} + +static inline void save_corelock(void) +{ + saved_corelock = corelock; + corelock.lock = 0; +} + +static inline void restore_corelock(void) +{ + corelock = saved_corelock; +} + + +static inline void nmi_wdt_keepalive(void) +{ + bfin_write_WDOGB_STAT(0); +} + +static inline void nmi_wdt_stop(void) +{ + bfin_write_WDOGB_CTL(WDEN_DISABLE); +} + +/* before calling this function, you must stop the WDT */ +static inline void nmi_wdt_clear(void) +{ + /* clear TRO bit, disable event generation */ + bfin_write_WDOGB_CTL(WDOG_EXPIRED | WDEN_DISABLE | ICTL_NONE); +} + +static inline void nmi_wdt_start(void) +{ + bfin_write_WDOGB_CTL(WDEN_ENABLE | ICTL_NMI); +} + +static inline int nmi_wdt_running(void) +{ + return ((bfin_read_WDOGB_CTL() & WDEN_MASK) != WDEN_DISABLE); +} + +static inline int nmi_wdt_set_timeout(unsigned long t) +{ + u32 cnt, max_t, sclk; + int run; + + sclk = get_sclk(); + max_t = -1 / sclk; + cnt = t * sclk; + if (t > max_t) { + pr_warning("NMI: timeout value is too large\n"); + return -EINVAL; + } + + run = nmi_wdt_running(); + nmi_wdt_stop(); + bfin_write_WDOGB_CNT(cnt); + if (run) + nmi_wdt_start(); + + timeout = t; + + return 0; +} + +int check_nmi_wdt_touched(void) +{ + unsigned int this_cpu = smp_processor_id(); + unsigned int cpu; + + cpumask_t mask = cpu_online_map; + + if (!atomic_read(&nmi_touched[this_cpu])) + return 0; + + atomic_set(&nmi_touched[this_cpu], 0); + + cpu_clear(this_cpu, mask); + for_each_cpu_mask(cpu, mask) { + invalidate_dcache_range((unsigned long)(&nmi_touched[cpu]), + (unsigned long)(&nmi_touched[cpu])); + if (!atomic_read(&nmi_touched[cpu])) + return 0; + atomic_set(&nmi_touched[cpu], 0); + } + + return 1; +} + +static void nmi_wdt_timer(unsigned long data) +{ + if (check_nmi_wdt_touched()) + nmi_wdt_keepalive(); + + mod_timer(&ntimer, jiffies + NMI_CHECK_TIMEOUT); +} + +static int __init init_nmi_wdt(void) +{ + nmi_wdt_set_timeout(timeout); + nmi_wdt_start(); + nmi_active = true; + + init_timer(&ntimer); + ntimer.function = nmi_wdt_timer; + ntimer.expires = jiffies + NMI_CHECK_TIMEOUT; + add_timer(&ntimer); + + pr_info("nmi_wdt: initialized: timeout=%d sec\n", timeout); + return 0; +} +device_initcall(init_nmi_wdt); + +void touch_nmi_watchdog(void) +{ + atomic_set(&nmi_touched[smp_processor_id()], 1); +} + +/* Suspend/resume support */ +#ifdef CONFIG_PM +static int nmi_wdt_suspend(struct sys_device *dev, pm_message_t state) +{ + nmi_wdt_stop(); + return 0; +} + +static int nmi_wdt_resume(struct sys_device *dev) +{ + if (nmi_active) + nmi_wdt_start(); + return 0; +} + +static struct sysdev_class nmi_sysclass = { + .name = DRV_NAME, + .resume = nmi_wdt_resume, + .suspend = nmi_wdt_suspend, +}; + +static struct sys_device device_nmi_wdt = { + .id = 0, + .cls = &nmi_sysclass, +}; + +static int __init init_nmi_wdt_sysfs(void) +{ + int error; + + if (!nmi_active) + return 0; + + error = sysdev_class_register(&nmi_sysclass); + if (!error) + error = sysdev_register(&device_nmi_wdt); + return error; +} +late_initcall(init_nmi_wdt_sysfs); + +#endif /* CONFIG_PM */ + + +asmlinkage notrace void do_nmi(struct pt_regs *fp) +{ + unsigned int cpu = smp_processor_id(); + nmi_enter(); + + cpu_pda[cpu].__nmi_count += 1; + + if (cpu == nmi_wdt_cpu) { + /* CoreB goes here first */ + + /* reload the WDOG_STAT */ + nmi_wdt_keepalive(); + + /* clear nmi interrupt for CoreB */ + nmi_wdt_stop(); + nmi_wdt_clear(); + + /* trigger NMI interrupt of CoreA */ + send_corea_nmi(); + + /* waiting CoreB to enter NMI */ + wait_nmi_event(COREA_ENTER_NMI); + + /* recover WDOGA's settings */ + restore_corea_nmi(); + + save_corelock(); + + /* corelock is save/cleared, CoreA is dummping messages */ + + wait_nmi_event(COREA_EXIT_NMI); + } else { + /* OK, CoreA entered NMI */ + set_nmi_event(COREA_ENTER_NMI); + } + + pr_emerg("\nNMI Watchdog detected LOCKUP, dump for CPU %d\n", cpu); + dump_bfin_process(fp); + dump_bfin_mem(fp); + show_regs(fp); + dump_bfin_trace_buffer(); + show_stack(current, (unsigned long *)fp); + + if (cpu == nmi_wdt_cpu) { + pr_emerg("This fault is not recoverable, sorry!\n"); + + /* CoreA dump finished, restore the corelock */ + restore_corelock(); + + set_nmi_event(COREB_EXIT_NMI); + } else { + /* CoreB dump finished, notice the CoreA we are done */ + set_nmi_event(COREA_EXIT_NMI); + + /* synchronize with CoreA */ + wait_nmi_event(COREB_EXIT_NMI); + } + + nmi_exit(); +} diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c index f5b286189647..29705cec91de 100644 --- a/arch/blackfin/kernel/process.c +++ b/arch/blackfin/kernel/process.c @@ -1,30 +1,9 @@ /* - * File: arch/blackfin/kernel/process.c - * Based on: - * Author: + * Blackfin architecture-dependent process handling * - * Created: - * Description: Blackfin architecture-dependent process handling. + * Copyright 2004-2009 Analog Devices Inc. * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/module.h> @@ -119,13 +98,6 @@ void cpu_idle(void) } } -/* Fill in the fpu structure for a core dump. */ - -int dump_fpu(struct pt_regs *regs, elf_fpregset_t * fpregs) -{ - return 1; -} - /* * This gets run with P1 containing the * function to call, and R1 containing @@ -172,7 +144,7 @@ void start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_ regs->pc = new_ip; if (current->mm) regs->p5 = current->mm->start_data; -#ifdef CONFIG_SMP +#ifndef CONFIG_SMP task_thread_info(current)->l1_task_info.stack_start = (void *)current->mm->context.stack_start; task_thread_info(current)->l1_task_info.lowest_sp = (void *)new_sp; @@ -236,22 +208,18 @@ copy_thread(unsigned long clone_flags, /* * sys_execve() executes a new program. */ - asmlinkage int sys_execve(char __user *name, char __user * __user *argv, char __user * __user *envp) { int error; char *filename; struct pt_regs *regs = (struct pt_regs *)((&name) + 6); - lock_kernel(); filename = getname(name); error = PTR_ERR(filename); if (IS_ERR(filename)) - goto out; + return error; error = do_execve(filename, argv, envp, regs); putname(filename); - out: - unlock_kernel(); return error; } @@ -283,9 +251,12 @@ void finish_atomic_sections (struct pt_regs *regs) int __user *up0 = (int __user *)regs->p0; switch (regs->pc) { + default: + /* not in middle of an atomic step, so resume like normal */ + return; + case ATOMIC_XCHG32 + 2: put_user(regs->r1, up0); - regs->pc = ATOMIC_XCHG32 + 4; break; case ATOMIC_CAS32 + 2: @@ -293,7 +264,6 @@ void finish_atomic_sections (struct pt_regs *regs) if (regs->r0 == regs->r1) case ATOMIC_CAS32 + 6: put_user(regs->r2, up0); - regs->pc = ATOMIC_CAS32 + 8; break; case ATOMIC_ADD32 + 2: @@ -301,7 +271,6 @@ void finish_atomic_sections (struct pt_regs *regs) /* fall through */ case ATOMIC_ADD32 + 4: put_user(regs->r0, up0); - regs->pc = ATOMIC_ADD32 + 6; break; case ATOMIC_SUB32 + 2: @@ -309,7 +278,6 @@ void finish_atomic_sections (struct pt_regs *regs) /* fall through */ case ATOMIC_SUB32 + 4: put_user(regs->r0, up0); - regs->pc = ATOMIC_SUB32 + 6; break; case ATOMIC_IOR32 + 2: @@ -317,7 +285,6 @@ void finish_atomic_sections (struct pt_regs *regs) /* fall through */ case ATOMIC_IOR32 + 4: put_user(regs->r0, up0); - regs->pc = ATOMIC_IOR32 + 6; break; case ATOMIC_AND32 + 2: @@ -325,7 +292,6 @@ void finish_atomic_sections (struct pt_regs *regs) /* fall through */ case ATOMIC_AND32 + 4: put_user(regs->r0, up0); - regs->pc = ATOMIC_AND32 + 6; break; case ATOMIC_XOR32 + 2: @@ -333,9 +299,15 @@ void finish_atomic_sections (struct pt_regs *regs) /* fall through */ case ATOMIC_XOR32 + 4: put_user(regs->r0, up0); - regs->pc = ATOMIC_XOR32 + 6; break; } + + /* + * We've finished the atomic section, and the only thing left for + * userspace is to do a RTS, so we might as well handle that too + * since we need to update the PC anyways. + */ + regs->pc = regs->rets; } static inline @@ -357,12 +329,58 @@ int in_mem_const(unsigned long addr, unsigned long size, { return in_mem_const_off(addr, size, 0, const_addr, const_size); } -#define IN_ASYNC(bnum, bctlnum) \ +#define ASYNC_ENABLED(bnum, bctlnum) \ ({ \ - (bfin_read_EBIU_AMGCTL() & 0xe) < ((bnum + 1) << 1) ? -EFAULT : \ - bfin_read_EBIU_AMBCTL##bctlnum() & B##bnum##RDYEN ? -EFAULT : \ - BFIN_MEM_ACCESS_CORE; \ + (bfin_read_EBIU_AMGCTL() & 0xe) < ((bnum + 1) << 1) ? 0 : \ + bfin_read_EBIU_AMBCTL##bctlnum() & B##bnum##RDYEN ? 0 : \ + 1; \ }) +/* + * We can't read EBIU banks that aren't enabled or we end up hanging + * on the access to the async space. Make sure we validate accesses + * that cross async banks too. + * 0 - found, but unusable + * 1 - found & usable + * 2 - not found + */ +static +int in_async(unsigned long addr, unsigned long size) +{ + if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE) { + if (!ASYNC_ENABLED(0, 0)) + return 0; + if (addr + size <= ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE) + return 1; + size -= ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE - addr; + addr = ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE; + } + if (addr >= ASYNC_BANK1_BASE && addr < ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE) { + if (!ASYNC_ENABLED(1, 0)) + return 0; + if (addr + size <= ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE) + return 1; + size -= ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE - addr; + addr = ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE; + } + if (addr >= ASYNC_BANK2_BASE && addr < ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE) { + if (!ASYNC_ENABLED(2, 1)) + return 0; + if (addr + size <= ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE) + return 1; + size -= ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE - addr; + addr = ASYNC_BANK2_BASE + ASYNC_BANK2_SIZE; + } + if (addr >= ASYNC_BANK3_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) { + if (ASYNC_ENABLED(3, 1)) + return 0; + if (addr + size <= ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) + return 1; + return 0; + } + + /* not within async bounds */ + return 2; +} int bfin_mem_access_type(unsigned long addr, unsigned long size) { @@ -399,17 +417,11 @@ int bfin_mem_access_type(unsigned long addr, unsigned long size) if (addr >= SYSMMR_BASE) return BFIN_MEM_ACCESS_CORE_ONLY; - /* We can't read EBIU banks that aren't enabled or we end up hanging - * on the access to the async space. - */ - if (in_mem_const(addr, size, ASYNC_BANK0_BASE, ASYNC_BANK0_SIZE)) - return IN_ASYNC(0, 0); - if (in_mem_const(addr, size, ASYNC_BANK1_BASE, ASYNC_BANK1_SIZE)) - return IN_ASYNC(1, 0); - if (in_mem_const(addr, size, ASYNC_BANK2_BASE, ASYNC_BANK2_SIZE)) - return IN_ASYNC(2, 1); - if (in_mem_const(addr, size, ASYNC_BANK3_BASE, ASYNC_BANK3_SIZE)) - return IN_ASYNC(3, 1); + switch (in_async(addr, size)) { + case 0: return -EFAULT; + case 1: return BFIN_MEM_ACCESS_CORE; + case 2: /* fall through */; + } if (in_mem_const(addr, size, BOOT_ROM_START, BOOT_ROM_LENGTH)) return BFIN_MEM_ACCESS_CORE; @@ -426,6 +438,8 @@ __attribute__((l1_text)) /* Return 1 if access to memory range is OK, 0 otherwise */ int _access_ok(unsigned long addr, unsigned long size) { + int aret; + if (size == 0) return 1; /* Check that things do not wrap around */ @@ -475,6 +489,11 @@ int _access_ok(unsigned long addr, unsigned long size) if (in_mem_const(addr, size, COREB_L1_DATA_B_START, COREB_L1_DATA_B_LENGTH)) return 1; #endif + + aret = in_async(addr, size); + if (aret < 2) + return aret; + if (in_mem_const_off(addr, size, _ebss_l2 - _stext_l2, L2_START, L2_LENGTH)) return 1; diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index 30f4828277ad..43eb969405d1 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -1,40 +1,21 @@ /* - * File: arch/blackfin/kernel/ptrace.c - * Based on: Taken from linux/kernel/ptrace.c - * Author: linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds + * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds + * these modifications are Copyright 2004-2010 Analog Devices Inc. * - * Created: 1/23/92 - * Description: - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/smp.h> +#include <linux/elf.h> #include <linux/errno.h> #include <linux/ptrace.h> #include <linux/user.h> +#include <linux/regset.h> #include <linux/signal.h> +#include <linux/tracehook.h> #include <linux/uaccess.h> #include <asm/page.h> @@ -47,90 +28,57 @@ #include <asm/cacheflush.h> #include <asm/mem_map.h> -#define TEXT_OFFSET 0 /* * does not yet catch signals sent when the child dies. * in exit.c or in signal.c. */ -/* determines which bits in the SYSCFG reg the user has access to. */ -/* 1 = access 0 = no access */ -#define SYSCFG_MASK 0x0007 /* SYSCFG reg */ -/* sets the trace bits. */ -#define TRACE_BITS 0x0001 - -/* Find the stack offset for a register, relative to thread.esp0. */ -#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg) - -/* - * Get the address of the live pt_regs for the specified task. - * These are saved onto the top kernel stack when the process - * is not running. - * - * Note: if a user thread is execve'd from kernel space, the - * kernel stack will not be empty on entry to the kernel, so - * ptracing these tasks will fail. - */ -static inline struct pt_regs *get_user_regs(struct task_struct *task) -{ - return (struct pt_regs *) - ((unsigned long)task_stack_page(task) + - (THREAD_SIZE - sizeof(struct pt_regs))); -} - -/* - * Get all user integer registers. - */ -static inline int ptrace_getregs(struct task_struct *tsk, void __user *uregs) -{ - struct pt_regs regs; - memcpy(®s, get_user_regs(tsk), sizeof(regs)); - regs.usp = tsk->thread.usp; - return copy_to_user(uregs, ®s, sizeof(struct pt_regs)) ? -EFAULT : 0; -} - -/* Mapping from PT_xxx to the stack offset at which the register is - * saved. Notice that usp has no stack-slot and needs to be treated - * specially (see get_reg/put_reg below). - */ - /* * Get contents of register REGNO in task TASK. */ -static inline long get_reg(struct task_struct *task, int regno) +static inline long +get_reg(struct task_struct *task, long regno, unsigned long __user *datap) { - unsigned char *reg_ptr; + long tmp; + struct pt_regs *regs = task_pt_regs(task); - struct pt_regs *regs = - (struct pt_regs *)((unsigned long)task_stack_page(task) + - (THREAD_SIZE - sizeof(struct pt_regs))); - reg_ptr = (char *)regs; + if (regno & 3 || regno > PT_LAST_PSEUDO || regno < 0) + return -EIO; switch (regno) { + case PT_TEXT_ADDR: + tmp = task->mm->start_code; + break; + case PT_TEXT_END_ADDR: + tmp = task->mm->end_code; + break; + case PT_DATA_ADDR: + tmp = task->mm->start_data; + break; case PT_USP: - return task->thread.usp; + tmp = task->thread.usp; + break; default: - if (regno <= 216) - return *(long *)(reg_ptr + regno); + if (regno < sizeof(*regs)) { + void *reg_ptr = regs; + tmp = *(long *)(reg_ptr + regno); + } else + return -EIO; } - /* slight mystery ... never seems to come here but kernel misbehaves without this code! */ - printk(KERN_WARNING "Request to get for unknown register %d\n", regno); - return 0; + return put_user(tmp, datap); } /* * Write contents of register REGNO in task TASK. */ static inline int -put_reg(struct task_struct *task, int regno, unsigned long data) +put_reg(struct task_struct *task, long regno, unsigned long data) { - char *reg_ptr; + struct pt_regs *regs = task_pt_regs(task); - struct pt_regs *regs = - (struct pt_regs *)((unsigned long)task_stack_page(task) + - (THREAD_SIZE - sizeof(struct pt_regs))); - reg_ptr = (char *)regs; + if (regno & 3 || regno > PT_LAST_PSEUDO || regno < 0) + return -EIO; switch (regno) { case PT_PC: @@ -147,10 +95,18 @@ put_reg(struct task_struct *task, int regno, unsigned long data) regs->usp = data; task->thread.usp = data; break; + case PT_SYSCFG: /* don't let userspace screw with this */ + if ((data & ~1) != 0x6) + pr_warning("ptrace: ignore syscfg write of %#lx\n", data); + break; /* regs->syscfg = data; break; */ default: - if (regno <= 216) - *(long *)(reg_ptr + regno) = data; + if (regno < sizeof(*regs)) { + void *reg_offset = regs; + *(long *)(reg_offset + regno) = data; + } + /* Ignore writes to pseudo registers */ } + return 0; } @@ -182,24 +138,98 @@ static inline int is_user_addr_valid(struct task_struct *child, return -EIO; } -void ptrace_enable(struct task_struct *child) +/* + * retrieve the contents of Blackfin userspace general registers + */ +static int genregs_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) { - unsigned long tmp; - tmp = get_reg(child, PT_SYSCFG) | (TRACE_BITS); - put_reg(child, PT_SYSCFG, tmp); + struct pt_regs *regs = task_pt_regs(target); + int ret; + + /* This sucks ... */ + regs->usp = target->thread.usp; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + regs, 0, sizeof(*regs)); + if (ret < 0) + return ret; + + return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, + sizeof(*regs), -1); } /* - * Called by kernel/ptrace.c when detaching.. - * - * Make sure the single step bit is not set. + * update the contents of the Blackfin userspace general registers + */ +static int genregs_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + struct pt_regs *regs = task_pt_regs(target); + int ret; + + /* Don't let people set SYSCFG (it's at the end of pt_regs) */ + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + regs, 0, PT_SYSCFG); + if (ret < 0) + return ret; + + /* This sucks ... */ + target->thread.usp = regs->usp; + /* regs->retx = regs->pc; */ + + return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, + PT_SYSCFG, -1); +} + +/* + * Define the register sets available on the Blackfin under Linux */ -void ptrace_disable(struct task_struct *child) +enum bfin_regset { + REGSET_GENERAL, +}; + +static const struct user_regset bfin_regsets[] = { + [REGSET_GENERAL] = { + .core_note_type = NT_PRSTATUS, + .n = sizeof(struct pt_regs) / sizeof(long), + .size = sizeof(long), + .align = sizeof(long), + .get = genregs_get, + .set = genregs_set, + }, +}; + +static const struct user_regset_view user_bfin_native_view = { + .name = "Blackfin", + .e_machine = EM_BLACKFIN, + .regsets = bfin_regsets, + .n = ARRAY_SIZE(bfin_regsets), +}; + +const struct user_regset_view *task_user_regset_view(struct task_struct *task) { - unsigned long tmp; - /* make sure the single step bit is not set. */ - tmp = get_reg(child, PT_SYSCFG) & ~TRACE_BITS; - put_reg(child, PT_SYSCFG, tmp); + return &user_bfin_native_view; +} + +void user_enable_single_step(struct task_struct *child) +{ + struct pt_regs *regs = task_pt_regs(child); + regs->syscfg |= SYSCFG_SSSTEP; + + set_tsk_thread_flag(child, TIF_SINGLESTEP); +} + +void user_disable_single_step(struct task_struct *child) +{ + struct pt_regs *regs = task_pt_regs(child); + regs->syscfg &= ~SYSCFG_SSSTEP; + + clear_tsk_thread_flag(child, TIF_SINGLESTEP); } long arch_ptrace(struct task_struct *child, long request, long addr, long data) @@ -262,40 +292,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) break; } - /* read the word at location addr in the USER area. */ - case PTRACE_PEEKUSR: - { - unsigned long tmp; - ret = -EIO; - tmp = 0; - if ((addr & 3) || (addr > (sizeof(struct pt_regs) + 16))) { - printk(KERN_WARNING "ptrace error : PEEKUSR : temporarily returning " - "0 - %x sizeof(pt_regs) is %lx\n", - (int)addr, sizeof(struct pt_regs)); - break; - } - if (addr == sizeof(struct pt_regs)) { - /* PT_TEXT_ADDR */ - tmp = child->mm->start_code + TEXT_OFFSET; - } else if (addr == (sizeof(struct pt_regs) + 4)) { - /* PT_TEXT_END_ADDR */ - tmp = child->mm->end_code; - } else if (addr == (sizeof(struct pt_regs) + 8)) { - /* PT_DATA_ADDR */ - tmp = child->mm->start_data; -#ifdef CONFIG_BINFMT_ELF_FDPIC - } else if (addr == (sizeof(struct pt_regs) + 12)) { - goto case_PTRACE_GETFDPIC_EXEC; - } else if (addr == (sizeof(struct pt_regs) + 16)) { - goto case_PTRACE_GETFDPIC_INTERP; -#endif - } else { - tmp = get_reg(child, addr); - } - ret = put_user(tmp, datap); - break; - } - #ifdef CONFIG_BINFMT_ELF_FDPIC case PTRACE_GETFDPIC: { unsigned long tmp = 0; @@ -337,20 +333,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) case BFIN_MEM_ACCESS_CORE: case BFIN_MEM_ACCESS_CORE_ONLY: copied = access_process_vm(child, addr, &data, - to_copy, 0); - if (copied) - break; - - /* hrm, why didn't that work ... maybe no mapping */ - if (addr >= FIXED_CODE_START && - addr + to_copy <= FIXED_CODE_END) { - copy_to_user_page(0, 0, 0, paddr, &data, to_copy); - copied = to_copy; - } else if (addr >= BOOT_ROM_START) { - memcpy(paddr, &data, to_copy); - copied = to_copy; - } - + to_copy, 1); break; case BFIN_MEM_ACCESS_DMA: if (safe_dma_memcpy(paddr, &data, to_copy)) @@ -371,78 +354,36 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) break; } - case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ - ret = -EIO; - if ((addr & 3) || (addr > (sizeof(struct pt_regs) + 16))) { - printk(KERN_WARNING "ptrace error : POKEUSR: temporarily returning 0\n"); - break; - } - - if (addr >= (sizeof(struct pt_regs))) { - ret = 0; - break; - } - if (addr == PT_SYSCFG) { - data &= SYSCFG_MASK; - data |= get_reg(child, PT_SYSCFG); + case PTRACE_PEEKUSR: + switch (addr) { +#ifdef CONFIG_BINFMT_ELF_FDPIC /* backwards compat */ + case PT_FDPIC_EXEC: goto case_PTRACE_GETFDPIC_EXEC; + case PT_FDPIC_INTERP: goto case_PTRACE_GETFDPIC_INTERP; +#endif + default: + ret = get_reg(child, addr, datap); } - ret = put_reg(child, addr, data); - break; - - case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ - case PTRACE_CONT: /* restart after signal. */ - pr_debug("ptrace: syscall/cont\n"); - - ret = -EIO; - if (!valid_signal(data)) - break; - if (request == PTRACE_SYSCALL) - set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - else - clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - child->exit_code = data; - ptrace_disable(child); - pr_debug("ptrace: before wake_up_process\n"); - wake_up_process(child); - ret = 0; - break; - - /* - * make the child exit. Best I can do is send it a sigkill. - * perhaps it should be put in the status that it wants to - * exit. - */ - case PTRACE_KILL: - ret = 0; - if (child->exit_state == EXIT_ZOMBIE) /* already dead */ - break; - child->exit_code = SIGKILL; - ptrace_disable(child); - wake_up_process(child); + pr_debug("ptrace: PEEKUSR reg %li with %#lx = %i\n", addr, data, ret); break; - case PTRACE_SINGLESTEP: /* set the trap flag. */ - pr_debug("ptrace: single step\n"); - ret = -EIO; - if (!valid_signal(data)) - break; - clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - ptrace_enable(child); - child->exit_code = data; - wake_up_process(child); - ret = 0; + case PTRACE_POKEUSR: + ret = put_reg(child, addr, data); + pr_debug("ptrace: POKEUSR reg %li with %li = %i\n", addr, data, ret); break; case PTRACE_GETREGS: - /* Get all gp regs from the child. */ - ret = ptrace_getregs(child, datap); - break; + pr_debug("ptrace: PTRACE_GETREGS\n"); + return copy_regset_to_user(child, &user_bfin_native_view, + REGSET_GENERAL, + 0, sizeof(struct pt_regs), + (void __user *)data); case PTRACE_SETREGS: - printk(KERN_WARNING "ptrace: SETREGS: **** NOT IMPLEMENTED ***\n"); - /* Set all gp regs in the child. */ - ret = 0; - break; + pr_debug("ptrace: PTRACE_SETREGS\n"); + return copy_regset_from_user(child, &user_bfin_native_view, + REGSET_GENERAL, + 0, sizeof(struct pt_regs), + (const void __user *)data); default: ret = ptrace_request(child, request, addr, data); @@ -452,27 +393,21 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) return ret; } -asmlinkage void syscall_trace(void) +asmlinkage int syscall_trace_enter(struct pt_regs *regs) { - if (!test_thread_flag(TIF_SYSCALL_TRACE)) - return; - - if (!(current->ptrace & PT_PTRACED)) - return; - - /* the 0x80 provides a way for the tracing parent to distinguish - * between a syscall stop and SIGTRAP delivery - */ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); - - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } + int ret = 0; + + if (test_thread_flag(TIF_SYSCALL_TRACE)) + ret = tracehook_report_syscall_entry(regs); + + return ret; +} + +asmlinkage void syscall_trace_leave(struct pt_regs *regs) +{ + int step; + + step = test_thread_flag(TIF_SINGLESTEP); + if (step || test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(regs, step); } diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 369535b61ed1..8e2efceb364b 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -1,9 +1,5 @@ /* - * arch/blackfin/kernel/setup.c - * - * Copyright 2004-2006 Analog Devices Inc. - * - * Enter bugs at http://blackfin.uclinux.org/ + * Copyright 2004-2009 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ @@ -182,10 +178,10 @@ void __init bfin_cache_init(void) void __init bfin_relocate_l1_mem(void) { - unsigned long l1_code_length; - unsigned long l1_data_a_length; - unsigned long l1_data_b_length; - unsigned long l2_length; + unsigned long text_l1_len = (unsigned long)_text_l1_len; + unsigned long data_l1_len = (unsigned long)_data_l1_len; + unsigned long data_b_l1_len = (unsigned long)_data_b_l1_len; + unsigned long l2_len = (unsigned long)_l2_len; early_shadow_stamp(); @@ -205,32 +201,35 @@ void __init bfin_relocate_l1_mem(void) blackfin_dma_early_init(); - /* if necessary, copy _stext_l1 to _etext_l1 to L1 instruction SRAM */ - l1_code_length = _etext_l1 - _stext_l1; - if (l1_code_length) - early_dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length); + /* if necessary, copy L1 text to L1 instruction SRAM */ + if (L1_CODE_LENGTH && text_l1_len) + early_dma_memcpy(_stext_l1, _text_l1_lma, text_l1_len); - /* if necessary, copy _sdata_l1 to _sbss_l1 to L1 data bank A SRAM */ - l1_data_a_length = _sbss_l1 - _sdata_l1; - if (l1_data_a_length) - early_dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length); + /* if necessary, copy L1 data to L1 data bank A SRAM */ + if (L1_DATA_A_LENGTH && data_l1_len) + early_dma_memcpy(_sdata_l1, _data_l1_lma, data_l1_len); - /* if necessary, copy _sdata_b_l1 to _sbss_b_l1 to L1 data bank B SRAM */ - l1_data_b_length = _sbss_b_l1 - _sdata_b_l1; - if (l1_data_b_length) - early_dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length + - l1_data_a_length, l1_data_b_length); + /* if necessary, copy L1 data B to L1 data bank B SRAM */ + if (L1_DATA_B_LENGTH && data_b_l1_len) + early_dma_memcpy(_sdata_b_l1, _data_b_l1_lma, data_b_l1_len); early_dma_memcpy_done(); - /* if necessary, copy _stext_l2 to _edata_l2 to L2 SRAM */ - if (L2_LENGTH != 0) { - l2_length = _sbss_l2 - _stext_l2; - if (l2_length) - memcpy(_stext_l2, _l2_lma_start, l2_length); - } + /* if necessary, copy L2 text/data to L2 SRAM */ + if (L2_LENGTH && l2_len) + memcpy(_stext_l2, _l2_lma, l2_len); } +#ifdef CONFIG_ROMKERNEL +void __init bfin_relocate_xip_data(void) +{ + early_shadow_stamp(); + + memcpy(_sdata, _data_lma, (unsigned long)_data_len - THREAD_SIZE + sizeof(struct thread_info)); + memcpy(_sinitdata, _init_data_lma, (unsigned long)_init_data_len); +} +#endif + /* add_memory_region to memmap */ static void __init add_memory_region(unsigned long long start, unsigned long long size, int type) @@ -515,7 +514,7 @@ static __init void memory_setup(void) #endif unsigned long max_mem; - _rambase = (unsigned long)_stext; + _rambase = CONFIG_BOOT_LOAD; _ramstart = (unsigned long)_end; if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) { @@ -608,13 +607,13 @@ static __init void memory_setup(void) } #ifdef CONFIG_MPU +#if defined(CONFIG_ROMFS_ON_MTD) && defined(CONFIG_MTD_ROM) + page_mask_nelts = (((_ramend + ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE - + ASYNC_BANK0_BASE) >> PAGE_SHIFT) + 31) / 32; +#else page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32; - page_mask_order = get_order(3 * page_mask_nelts * sizeof(long)); #endif - -#if !defined(CONFIG_MTD_UCLINUX) - /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/ - memory_end -= SIZE_4K; + page_mask_order = get_order(3 * page_mask_nelts * sizeof(long)); #endif init_mm.start_code = (unsigned long)_stext; @@ -646,7 +645,7 @@ static __init void memory_setup(void) __bss_start, __bss_stop, _sdata, _edata, (void *)&init_thread_union, - (void *)((int)(&init_thread_union) + 0x2000), + (void *)((int)(&init_thread_union) + THREAD_SIZE), __init_begin, __init_end, (void *)_ramstart, (void *)memory_end #ifdef CONFIG_MTD_UCLINUX @@ -808,10 +807,17 @@ static inline int __init get_mem_size(void) BUG(); } +__attribute__((weak)) +void __init native_machine_early_platform_add_devices(void) +{ +} + void __init setup_arch(char **cmdline_p) { unsigned long sclk, cclk; + native_machine_early_platform_add_devices(); + enable_shadow_console(); /* Check to make sure we are running on the right processor */ @@ -921,7 +927,7 @@ void __init setup_arch(char **cmdline_p) printk(KERN_INFO "Blackfin support (C) 2004-2009 Analog Devices, Inc.\n"); if (bfin_compiled_revid() == 0xffff) - printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU); + printk(KERN_INFO "Compiled for ADSP-%s Rev any, running on 0.%d\n", CPU, bfin_revid()); else if (bfin_compiled_revid() == -1) printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU); else @@ -1233,10 +1239,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS, BFIN_DLINES); #ifdef __ARCH_SYNC_CORE_DCACHE - seq_printf(m, "SMP Dcache Flushes\t: %lu\n\n", cpudata->dcache_invld_count); + seq_printf(m, "SMP Dcache Flushes\t: %lu\n\n", dcache_invld_count[cpu_num]); #endif #ifdef __ARCH_SYNC_CORE_ICACHE - seq_printf(m, "SMP Icache Flushes\t: %lu\n\n", cpudata->icache_invld_count); + seq_printf(m, "SMP Icache Flushes\t: %lu\n\n", icache_invld_count[cpu_num]); #endif if (cpu_num != num_possible_cpus() - 1) @@ -1265,8 +1271,8 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n", physical_mem_end >> 10, (void *)0, (void *)physical_mem_end); seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n", - ((int)memory_end - (int)_stext) >> 10, - _stext, + ((int)memory_end - (int)_rambase) >> 10, + (void *)_rambase, (void *)memory_end); seq_printf(m, "\n"); diff --git a/arch/blackfin/kernel/shadow_console.c b/arch/blackfin/kernel/shadow_console.c index 8b8c7107a162..557e9fef406a 100644 --- a/arch/blackfin/kernel/shadow_console.c +++ b/arch/blackfin/kernel/shadow_console.c @@ -4,8 +4,6 @@ * * Copyright 2009 Analog Devices Inc. * - * Enter bugs at http://blackfin.uclinux.org/ - * * Licensed under the GPL-2 or later. */ diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c index dbc3bbf846be..d536f35d1f43 100644 --- a/arch/blackfin/kernel/signal.c +++ b/arch/blackfin/kernel/signal.c @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/kernel/signal.c - * Based on: - * Author: + * Copyright 2004-2010 Analog Devices Inc. * - * Created: - * Description: - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/signal.h> @@ -35,10 +12,12 @@ #include <linux/binfmts.h> #include <linux/freezer.h> #include <linux/uaccess.h> +#include <linux/tracehook.h> #include <asm/cacheflush.h> #include <asm/ucontext.h> #include <asm/fixed_code.h> +#include <asm/syscall.h> #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) @@ -72,6 +51,9 @@ rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *p unsigned long usp = 0; int err = 0; + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + #define RESTORE(x) err |= __get_user(regs->x, &sc->sc_##x) /* restore passed registers */ @@ -228,16 +210,6 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info, regs->r1 = (unsigned long)(&frame->info); regs->r2 = (unsigned long)(&frame->uc); - /* - * Clear the trace flag when entering the signal handler, but - * notify any tracer that was single-stepping it. The tracer - * may want to single-step inside the handler too. - */ - if (regs->syscfg & TRACE_BITS) { - regs->syscfg &= ~TRACE_BITS; - ptrace_notify(SIGTRAP); - } - return 0; give_sigsegv: @@ -269,6 +241,11 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) regs->r0 = regs->orig_r0; regs->pc -= 2; break; + + case -ERESTART_RESTARTBLOCK: + regs->p0 = __NR_restart_syscall; + regs->pc -= 2; + break; } } @@ -337,6 +314,9 @@ asmlinkage void do_signal(struct pt_regs *regs) * clear the TIF_RESTORE_SIGMASK flag */ if (test_thread_flag(TIF_RESTORE_SIGMASK)) clear_thread_flag(TIF_RESTORE_SIGMASK); + + tracehook_signal_handler(signr, &info, &ka, regs, + test_thread_flag(TIF_SINGLESTEP)); } return; @@ -355,3 +335,20 @@ asmlinkage void do_signal(struct pt_regs *regs) sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); } } + +/* + * notification of userspace execution resumption + */ +asmlinkage void do_notify_resume(struct pt_regs *regs) +{ + if (test_thread_flag(TIF_SIGPENDING) || test_thread_flag(TIF_RESTORE_SIGMASK)) + do_signal(regs); + + if (test_thread_flag(TIF_NOTIFY_RESUME)) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + if (current->replacement_session_keyring) + key_replace_session_keyring(); + } +} + diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c index 3da60fb13ce4..2e7f8e10bf87 100644 --- a/arch/blackfin/kernel/sys_bfin.c +++ b/arch/blackfin/kernel/sys_bfin.c @@ -1,32 +1,10 @@ /* - * File: arch/blackfin/kernel/sys_bfin.c - * Based on: - * Author: + * contains various random system calls that have a non-standard + * calling sequence on the Linux/Blackfin platform. * - * Created: - * Description: This file contains various random system calls that - * have a non-standard calling sequence on the Linux/bfin - * platform. + * Copyright 2004-2009 Analog Devices Inc. * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/spinlock.h> @@ -44,39 +22,6 @@ #include <asm/cacheflush.h> #include <asm/dma.h> -/* common code for old and new mmaps */ -static inline long -do_mmap2(unsigned long addr, unsigned long len, - unsigned long prot, unsigned long flags, - unsigned long fd, unsigned long pgoff) -{ - int error = -EBADF; - struct file *file = NULL; - - flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); - if (!(flags & MAP_ANONYMOUS)) { - file = fget(fd); - if (!file) - goto out; - } - - down_write(¤t->mm->mmap_sem); - error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); - up_write(¤t->mm->mmap_sem); - - if (file) - fput(file); - out: - return error; -} - -asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, - unsigned long prot, unsigned long flags, - unsigned long fd, unsigned long pgoff) -{ - return do_mmap2(addr, len, prot, flags, fd, pgoff); -} - asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags) { return sram_alloc_with_lsl(size, flags); @@ -91,3 +36,14 @@ asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len) { return safe_dma_memcpy(dest, src, len); } + +#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE) +#include <linux/fb.h> +unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, + unsigned long len, unsigned long pgoff, unsigned long flags) +{ + struct fb_info *info = filp->private_data; + return (unsigned long)info->screen_base; +} +EXPORT_SYMBOL(get_fb_unmapped_area); +#endif diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c index f9715764383e..cb7a01d4f009 100644 --- a/arch/blackfin/kernel/time-ts.c +++ b/arch/blackfin/kernel/time-ts.c @@ -1,13 +1,13 @@ /* - * linux/arch/kernel/time-ts.c - * * Based on arm clockevents implementation and old bfin time tick. * - * Copyright(C) 2008, GeoTechnologies, Vitja Makarov + * Copyright 2008-2009 Analog Devics Inc. + * 2008 GeoTechnologies + * Vitja Makarov * - * This code is licenced under the GPL version 2. For details see - * kernel-base/COPYING. + * Licensed under the GPL-2 */ + #include <linux/module.h> #include <linux/profile.h> #include <linux/interrupt.h> @@ -21,8 +21,7 @@ #include <asm/blackfin.h> #include <asm/time.h> #include <asm/gptimers.h> - -#if defined(CONFIG_CYCLES_CLOCKSOURCE) +#include <asm/nmi.h> /* Accelerators for sched_clock() * convert from cycles(64bits) => nanoseconds (64bits) @@ -46,22 +45,17 @@ * -johnstul@us.ibm.com "math is hard, lets go shopping!" */ -static unsigned long cyc2ns_scale; #define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */ -static inline void set_cyc2ns_scale(unsigned long cpu_khz) -{ - cyc2ns_scale = (1000000 << CYC2NS_SCALE_FACTOR) / cpu_khz; -} - -static inline unsigned long long cycles_2_ns(cycle_t cyc) -{ - return (cyc * cyc2ns_scale) >> CYC2NS_SCALE_FACTOR; -} +#if defined(CONFIG_CYCLES_CLOCKSOURCE) -static cycle_t bfin_read_cycles(struct clocksource *cs) +static notrace cycle_t bfin_read_cycles(struct clocksource *cs) { +#ifdef CONFIG_CPU_FREQ return __bfin_cycles_off + (get_cycles() << __bfin_cycles_mod); +#else + return get_cycles(); +#endif } static struct clocksource bfin_cs_cycles = { @@ -69,19 +63,18 @@ static struct clocksource bfin_cs_cycles = { .rating = 400, .read = bfin_read_cycles, .mask = CLOCKSOURCE_MASK(64), - .shift = 22, + .shift = CYC2NS_SCALE_FACTOR, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -unsigned long long sched_clock(void) +static inline unsigned long long bfin_cs_cycles_sched_clock(void) { - return cycles_2_ns(bfin_read_cycles(&bfin_cs_cycles)); + return clocksource_cyc2ns(bfin_read_cycles(&bfin_cs_cycles), + bfin_cs_cycles.mult, bfin_cs_cycles.shift); } static int __init bfin_cs_cycles_init(void) { - set_cyc2ns_scale(get_cclk() / 1000); - bfin_cs_cycles.mult = \ clocksource_hz2mult(get_cclk(), bfin_cs_cycles.shift); @@ -108,7 +101,7 @@ void __init setup_gptimer0(void) enable_gptimers(TIMER0bit); } -static cycle_t bfin_read_gptimer0(void) +static cycle_t bfin_read_gptimer0(struct clocksource *cs) { return bfin_read_TIMER0_COUNTER(); } @@ -118,10 +111,16 @@ static struct clocksource bfin_cs_gptimer0 = { .rating = 350, .read = bfin_read_gptimer0, .mask = CLOCKSOURCE_MASK(32), - .shift = 22, + .shift = CYC2NS_SCALE_FACTOR, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static inline unsigned long long bfin_cs_gptimer0_sched_clock(void) +{ + return clocksource_cyc2ns(bfin_read_TIMER0_COUNTER(), + bfin_cs_gptimer0.mult, bfin_cs_gptimer0.shift); +} + static int __init bfin_cs_gptimer0_init(void) { setup_gptimer0(); @@ -138,47 +137,20 @@ static int __init bfin_cs_gptimer0_init(void) # define bfin_cs_gptimer0_init() #endif -#ifdef CONFIG_CORE_TIMER_IRQ_L1 -__attribute__((l1_text)) -#endif -irqreturn_t timer_interrupt(int irq, void *dev_id); - -static int bfin_timer_set_next_event(unsigned long, \ - struct clock_event_device *); - -static void bfin_timer_set_mode(enum clock_event_mode, \ - struct clock_event_device *); - -static struct clock_event_device clockevent_bfin = { -#if defined(CONFIG_TICKSOURCE_GPTMR0) - .name = "bfin_gptimer0", - .rating = 300, - .irq = IRQ_TIMER0, +#if defined(CONFIG_GPTMR0_CLOCKSOURCE) || defined(CONFIG_CYCLES_CLOCKSOURCE) +/* prefer to use cycles since it has higher rating */ +notrace unsigned long long sched_clock(void) +{ +#if defined(CONFIG_CYCLES_CLOCKSOURCE) + return bfin_cs_cycles_sched_clock(); #else - .name = "bfin_core_timer", - .rating = 350, - .irq = IRQ_CORETMR, + return bfin_cs_gptimer0_sched_clock(); #endif - .shift = 32, - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_next_event = bfin_timer_set_next_event, - .set_mode = bfin_timer_set_mode, -}; - -static struct irqaction bfin_timer_irq = { -#if defined(CONFIG_TICKSOURCE_GPTMR0) - .name = "Blackfin GPTimer0", -#else - .name = "Blackfin CoreTimer", +} #endif - .flags = IRQF_DISABLED | IRQF_TIMER | \ - IRQF_IRQPOLL | IRQF_PERCPU, - .handler = timer_interrupt, - .dev_id = &clockevent_bfin, -}; #if defined(CONFIG_TICKSOURCE_GPTMR0) -static int bfin_timer_set_next_event(unsigned long cycles, +static int bfin_gptmr0_set_next_event(unsigned long cycles, struct clock_event_device *evt) { disable_gptimers(TIMER0bit); @@ -189,7 +161,7 @@ static int bfin_timer_set_next_event(unsigned long cycles, return 0; } -static void bfin_timer_set_mode(enum clock_event_mode mode, +static void bfin_gptmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { switch (mode) { @@ -217,25 +189,65 @@ static void bfin_timer_set_mode(enum clock_event_mode mode, } } -static void bfin_timer_ack(void) +static void bfin_gptmr0_ack(void) { set_gptimer_status(TIMER_GROUP1, TIMER_STATUS_TIMIL0); } -static void __init bfin_timer_init(void) +static void __init bfin_gptmr0_init(void) { disable_gptimers(TIMER0bit); } -static unsigned long __init bfin_clockevent_check(void) +#ifdef CONFIG_CORE_TIMER_IRQ_L1 +__attribute__((l1_text)) +#endif +irqreturn_t bfin_gptmr0_interrupt(int irq, void *dev_id) { - setup_irq(IRQ_TIMER0, &bfin_timer_irq); - return get_sclk(); + struct clock_event_device *evt = dev_id; + smp_mb(); + evt->event_handler(evt); + bfin_gptmr0_ack(); + return IRQ_HANDLED; } -#else /* CONFIG_TICKSOURCE_CORETMR */ +static struct irqaction gptmr0_irq = { + .name = "Blackfin GPTimer0", + .flags = IRQF_DISABLED | IRQF_TIMER | \ + IRQF_IRQPOLL | IRQF_PERCPU, + .handler = bfin_gptmr0_interrupt, +}; -static int bfin_timer_set_next_event(unsigned long cycles, +static struct clock_event_device clockevent_gptmr0 = { + .name = "bfin_gptimer0", + .rating = 300, + .irq = IRQ_TIMER0, + .shift = 32, + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_next_event = bfin_gptmr0_set_next_event, + .set_mode = bfin_gptmr0_set_mode, +}; + +static void __init bfin_gptmr0_clockevent_init(struct clock_event_device *evt) +{ + unsigned long clock_tick; + + clock_tick = get_sclk(); + evt->mult = div_sc(clock_tick, NSEC_PER_SEC, evt->shift); + evt->max_delta_ns = clockevent_delta2ns(-1, evt); + evt->min_delta_ns = clockevent_delta2ns(100, evt); + + evt->cpumask = cpumask_of(0); + + clockevents_register_device(evt); +} +#endif /* CONFIG_TICKSOURCE_GPTMR0 */ + +#if defined(CONFIG_TICKSOURCE_CORETMR) +/* per-cpu local core timer */ +static DEFINE_PER_CPU(struct clock_event_device, coretmr_events); + +static int bfin_coretmr_set_next_event(unsigned long cycles, struct clock_event_device *evt) { bfin_write_TCNTL(TMPWR); @@ -246,7 +258,7 @@ static int bfin_timer_set_next_event(unsigned long cycles, return 0; } -static void bfin_timer_set_mode(enum clock_event_mode mode, +static void bfin_coretmr_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { switch (mode) { @@ -278,19 +290,13 @@ static void bfin_timer_set_mode(enum clock_event_mode mode, } } -static void bfin_timer_ack(void) -{ -} - -static void __init bfin_timer_init(void) +void bfin_coretmr_init(void) { /* power up the timer, but don't enable it just yet */ bfin_write_TCNTL(TMPWR); CSYNC(); - /* - * the TSCALE prescaler counter. - */ + /* the TSCALE prescaler counter. */ bfin_write_TSCALE(TIME_SCALE - 1); bfin_write_TPERIOD(0); bfin_write_TCOUNT(0); @@ -298,48 +304,54 @@ static void __init bfin_timer_init(void) CSYNC(); } -static unsigned long __init bfin_clockevent_check(void) +#ifdef CONFIG_CORE_TIMER_IRQ_L1 +__attribute__((l1_text)) +#endif +irqreturn_t bfin_coretmr_interrupt(int irq, void *dev_id) { - setup_irq(IRQ_CORETMR, &bfin_timer_irq); - return get_cclk() / TIME_SCALE; -} + int cpu = smp_processor_id(); + struct clock_event_device *evt = &per_cpu(coretmr_events, cpu); -void __init setup_core_timer(void) -{ - bfin_timer_init(); - bfin_timer_set_mode(CLOCK_EVT_MODE_PERIODIC, NULL); -} -#endif /* CONFIG_TICKSOURCE_GPTMR0 */ - -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "do_timer()" routine every clocktick - */ -irqreturn_t timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = dev_id; smp_mb(); evt->event_handler(evt); - bfin_timer_ack(); - return IRQ_HANDLED; -} -static int __init bfin_clockevent_init(void) -{ - unsigned long timer_clk; - - timer_clk = bfin_clockevent_check(); + touch_nmi_watchdog(); - bfin_timer_init(); + return IRQ_HANDLED; +} - clockevent_bfin.mult = div_sc(timer_clk, NSEC_PER_SEC, clockevent_bfin.shift); - clockevent_bfin.max_delta_ns = clockevent_delta2ns(-1, &clockevent_bfin); - clockevent_bfin.min_delta_ns = clockevent_delta2ns(100, &clockevent_bfin); - clockevent_bfin.cpumask = cpumask_of(0); - clockevents_register_device(&clockevent_bfin); +static struct irqaction coretmr_irq = { + .name = "Blackfin CoreTimer", + .flags = IRQF_DISABLED | IRQF_TIMER | \ + IRQF_IRQPOLL | IRQF_PERCPU, + .handler = bfin_coretmr_interrupt, +}; - return 0; +void bfin_coretmr_clockevent_init(void) +{ + unsigned long clock_tick; + unsigned int cpu = smp_processor_id(); + struct clock_event_device *evt = &per_cpu(coretmr_events, cpu); + + evt->name = "bfin_core_timer"; + evt->rating = 350; + evt->irq = -1; + evt->shift = 32; + evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; + evt->set_next_event = bfin_coretmr_set_next_event; + evt->set_mode = bfin_coretmr_set_mode; + + clock_tick = get_cclk() / TIME_SCALE; + evt->mult = div_sc(clock_tick, NSEC_PER_SEC, evt->shift); + evt->max_delta_ns = clockevent_delta2ns(-1, evt); + evt->min_delta_ns = clockevent_delta2ns(100, evt); + + evt->cpumask = cpumask_of(cpu); + + clockevents_register_device(evt); } +#endif /* CONFIG_TICKSOURCE_CORETMR */ + void __init time_init(void) { @@ -363,5 +375,21 @@ void __init time_init(void) bfin_cs_cycles_init(); bfin_cs_gptimer0_init(); - bfin_clockevent_init(); + +#if defined(CONFIG_TICKSOURCE_CORETMR) + bfin_coretmr_init(); + setup_irq(IRQ_CORETMR, &coretmr_irq); + bfin_coretmr_clockevent_init(); +#endif + +#if defined(CONFIG_TICKSOURCE_GPTMR0) + bfin_gptmr0_init(); + setup_irq(IRQ_TIMER0, &gptmr0_irq); + gptmr0_irq.dev_id = &clockevent_gptmr0; + bfin_gptmr0_clockevent_init(&clockevent_gptmr0); +#endif + +#if !defined(CONFIG_TICKSOURCE_CORETMR) && !defined(CONFIG_TICKSOURCE_GPTMR0) +# error at least one clock event device is required +#endif } diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c index adb54aa7d7c8..13c1ee3e6408 100644 --- a/arch/blackfin/kernel/time.c +++ b/arch/blackfin/kernel/time.c @@ -14,6 +14,7 @@ #include <linux/time.h> #include <linux/irq.h> #include <linux/delay.h> +#include <linux/sched.h> #include <asm/blackfin.h> #include <asm/time.h> @@ -81,11 +82,11 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *)) #endif } +#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET /* * Should return useconds since last timer tick */ -#ifndef CONFIG_GENERIC_TIME -static unsigned long gettimeoffset(void) +u32 arch_gettimeoffset(void) { unsigned long offset; unsigned long clocks_per_jiffy; @@ -183,70 +184,3 @@ void __init time_init(void) time_sched_init(timer_interrupt); } - -#ifndef CONFIG_GENERIC_TIME -void do_gettimeofday(struct timeval *tv) -{ - unsigned long flags; - unsigned long seq; - unsigned long usec, sec; - - do { - seq = read_seqbegin_irqsave(&xtime_lock, flags); - usec = gettimeoffset(); - sec = xtime.tv_sec; - usec += (xtime.tv_nsec / NSEC_PER_USEC); - } - while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - - while (usec >= USEC_PER_SEC) { - usec -= USEC_PER_SEC; - sec++; - } - - tv->tv_sec = sec; - tv->tv_usec = usec; -} -EXPORT_SYMBOL(do_gettimeofday); - -int do_settimeofday(struct timespec *tv) -{ - time_t wtm_sec, sec = tv->tv_sec; - long wtm_nsec, nsec = tv->tv_nsec; - - if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) - return -EINVAL; - - write_seqlock_irq(&xtime_lock); - /* - * This is revolting. We need to set the xtime.tv_usec - * correctly. However, the value in this location is - * is value at the last tick. - * Discover what correction gettimeofday - * would have done, and then undo it! - */ - nsec -= (gettimeoffset() * NSEC_PER_USEC); - - wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); - wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); - - set_normalized_timespec(&xtime, sec, nsec); - set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); - - ntp_clear(); - - write_sequnlock_irq(&xtime_lock); - clock_was_set(); - - return 0; -} -EXPORT_SYMBOL(do_settimeofday); -#endif /* !CONFIG_GENERIC_TIME */ - -/* - * Scheduler clock - returns current time in nanosec units. - */ -unsigned long long sched_clock(void) -{ - return (unsigned long long)jiffies *(NSEC_PER_SEC / HZ); -} diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index 56464cb8edf3..ba70c4bc2699 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/kernel/traps.c - * Based on: - * Author: Hamish Macdonald + * Copyright 2004-2009 Analog Devices Inc. * - * Created: - * Description: uses S/W interrupt 15 for the system calls - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include <linux/bug.h> @@ -142,6 +119,15 @@ static void decode_address(char *buf, unsigned long address) return; } + /* + * Don't walk any of the vmas if we are oopsing, it has been known + * to cause problems - corrupt vmas (kernel crashes) cause double faults + */ + if (oops_in_progress) { + strcat(buf, "/* kernel dynamic memory (maybe user-space) */"); + return; + } + /* looks like we're off in user-land, so let's walk all the * mappings of all our processes and see if we can't be a whee * bit more specific @@ -152,6 +138,12 @@ static void decode_address(char *buf, unsigned long address) if (!mm) continue; + if (!down_read_trylock(&mm->mmap_sem)) { + if (!in_atomic) + mmput(mm); + continue; + } + for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { struct vm_area_struct *vma; @@ -191,6 +183,7 @@ static void decode_address(char *buf, unsigned long address) sprintf(buf, "[ %s vma:0x%lx-0x%lx]", name, vma->vm_start, vma->vm_end); + up_read(&mm->mmap_sem); if (!in_atomic) mmput(mm); @@ -200,11 +193,16 @@ static void decode_address(char *buf, unsigned long address) goto done; } } + + up_read(&mm->mmap_sem); if (!in_atomic) mmput(mm); } - /* we were unable to find this address anywhere */ + /* + * we were unable to find this address anywhere, + * or some MMs were skipped because they were in use. + */ sprintf(buf, "/* kernel dynamic memory */"); done: @@ -262,9 +260,7 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON int j; #endif -#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO unsigned int cpu = raw_smp_processor_id(); -#endif const char *strerror = NULL; int sig = 0; siginfo_t info; @@ -538,6 +534,36 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) break; /* External Memory Addressing Error */ case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): + if (ANOMALY_05000310) { + static unsigned long anomaly_rets; + + if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && + (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) { + /* + * A false hardware error will happen while fetching at + * the L1 instruction SRAM boundary. Ignore it. + */ + anomaly_rets = fp->rets; + goto traps_done; + } else if (fp->rets == anomaly_rets) { + /* + * While boundary code returns to a function, at the ret + * point, a new false hardware error might occur too based + * on tests. Ignore it too. + */ + goto traps_done; + } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && + (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) { + /* + * If boundary code calls a function, at the entry point, + * a new false hardware error maybe happen based on tests. + * Ignore it too. + */ + goto traps_done; + } else + anomaly_rets = 0; + } + info.si_code = BUS_ADRERR; sig = SIGBUS; strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); @@ -623,7 +649,17 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) { info.si_signo = sig; info.si_errno = 0; - info.si_addr = (void __user *)fp->pc; + switch (trapnr) { + case VEC_CPLB_VL: + case VEC_MISALI_D: + case VEC_CPLB_M: + case VEC_CPLB_MHIT: + info.si_addr = (void __user *)cpu_pda[cpu].dcplb_fault_addr; + break; + default: + info.si_addr = (void __user *)fp->pc; + break; + } force_sig_info(sig, &info, current); } @@ -642,7 +678,7 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) /* * Similar to get_user, do some address checking, then dereference - * Return true on sucess, false on bad address + * Return true on success, false on bad address */ static bool get_instruction(unsigned short *val, unsigned short *address) { @@ -696,7 +732,7 @@ static void decode_instruction(unsigned short *address) verbose_printk("RTE"); else if (opcode == 0x0025) verbose_printk("EMUEXCPT"); - else if (opcode == 0x0040 && opcode <= 0x0047) + else if (opcode >= 0x0040 && opcode <= 0x0047) verbose_printk("STI R%i", opcode & 7); else if (opcode >= 0x0050 && opcode <= 0x0057) verbose_printk("JUMP (P%i)", opcode & 7); @@ -999,12 +1035,12 @@ void dump_bfin_process(struct pt_regs *fp) !((unsigned long)current & 0x3) && current->pid) { verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n"); if (current->comm >= (char *)FIXED_CODE_START) - verbose_printk(KERN_NOTICE "COMM=%s PID=%d\n", + verbose_printk(KERN_NOTICE "COMM=%s PID=%d", current->comm, current->pid); else - verbose_printk(KERN_NOTICE "COMM= invalid\n"); + verbose_printk(KERN_NOTICE "COMM= invalid"); - printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu); + printk(KERN_CONT " CPU=%d\n", current_thread_info()->cpu); if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) verbose_printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" @@ -1080,7 +1116,7 @@ void dump_bfin_mem(struct pt_regs *fp) /* And the last RETI points to the current userspace context */ if ((fp + 1)->pc >= current->mm->start_code && (fp + 1)->pc <= current->mm->end_code) { - verbose_printk(KERN_NOTICE "It might be better to look around here : \n"); + verbose_printk(KERN_NOTICE "It might be better to look around here :\n"); verbose_printk(KERN_NOTICE "-------------------------------------------\n"); show_regs(fp + 1); verbose_printk(KERN_NOTICE "-------------------------------------------\n"); @@ -1163,7 +1199,7 @@ void show_regs(struct pt_regs *fp) if (fp->ipend & ~0x3F) { for (i = 0; i < (NR_IRQS - 1); i++) { if (!in_atomic) - spin_lock_irqsave(&irq_desc[i].lock, flags); + raw_spin_lock_irqsave(&irq_desc[i].lock, flags); action = irq_desc[i].action; if (!action) @@ -1178,7 +1214,7 @@ void show_regs(struct pt_regs *fp) verbose_printk("\n"); unlock: if (!in_atomic) - spin_unlock_irqrestore(&irq_desc[i].lock, flags); + raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); } } diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S index ffd90fbbc8f9..984c78172397 100644 --- a/arch/blackfin/kernel/vmlinux.lds.S +++ b/arch/blackfin/kernel/vmlinux.lds.S @@ -1,34 +1,9 @@ /* - * File: arch/blackfin/kernel/vmlinux.lds.S - * Based on: none - original work - * Author: + * Copyright 2004-2009 Analog Devices Inc. * - * Created: Tue Sep 21 2004 - * Description: Master linker script for blackfin architecture - * - * Modified: - * Copyright 2004-2007 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ -#define VMLINUX_SYMBOL(_sym_) _##_sym_ - #include <asm-generic/vmlinux.lds.h> #include <asm/mem_map.h> #include <asm/page.h> @@ -40,7 +15,12 @@ _jiffies = _jiffies_64; SECTIONS { +#ifdef CONFIG_RAMKERNEL . = CONFIG_BOOT_LOAD; +#else + . = CONFIG_ROM_BASE; +#endif + /* Neither the text, ro_data or bss section need to be aligned * So pack them back to back */ @@ -56,6 +36,12 @@ SECTIONS LOCK_TEXT IRQENTRY_TEXT KPROBES_TEXT +#ifdef CONFIG_ROMKERNEL + __sinittext = .; + INIT_TEXT + __einittext = .; + EXIT_TEXT +#endif *(.text.*) *(.fixup) @@ -75,8 +61,14 @@ SECTIONS /* Just in case the first read only is a 32-bit access */ RO_DATA(4) + __rodata_end = .; +#ifdef CONFIG_ROMKERNEL + . = CONFIG_BOOT_LOAD; + .bss : AT(__rodata_end) +#else .bss : +#endif { . = ALIGN(4); ___bss_start = .; @@ -92,7 +84,11 @@ SECTIONS ___bss_stop = .; } +#if defined(CONFIG_ROMKERNEL) + .data : AT(LOADADDR(.bss) + SIZEOF(.bss)) +#else .data : +#endif { __sdata = .; /* This gets done first, so the glob doesn't suck it in */ @@ -119,6 +115,8 @@ SECTIONS __edata = .; } + __data_lma = LOADADDR(.data); + __data_len = SIZEOF(.data); /* The init section should be last, so when we free it, it goes into * the general memory pool, and (hopefully) will decrease fragmentation @@ -128,27 +126,58 @@ SECTIONS . = ALIGN(PAGE_SIZE); ___init_begin = .; +#ifdef CONFIG_RAMKERNEL INIT_TEXT_SECTION(PAGE_SIZE) - . = ALIGN(16); - INIT_DATA_SECTION(16) - PERCPU(4) - /* we have to discard exit text and such at runtime, not link time, to + /* We have to discard exit text and such at runtime, not link time, to * handle embedded cross-section references (alt instructions, bug - * table, eh_frame, etc...) + * table, eh_frame, etc...). We need all of our .text up front and + * .data after it for PCREL call issues. */ .exit.text : { EXIT_TEXT } + + . = ALIGN(16); + INIT_DATA_SECTION(16) + PERCPU(4) + .exit.data : { EXIT_DATA } - __l1_lma_start = .; - .text_l1 L1_CODE_START : AT(LOADADDR(.exit.data) + SIZEOF(.exit.data)) +#else + .init.data : AT(__data_lma + __data_len) + { + __sinitdata = .; + INIT_DATA + INIT_SETUP(16) + INIT_CALLS + CON_INITCALL + SECURITY_INITCALL + INIT_RAM_FS + + . = ALIGN(4); + ___per_cpu_load = .; + ___per_cpu_start = .; + *(.data.percpu.first) + *(.data.percpu.page_aligned) + *(.data.percpu) + *(.data.percpu.shared_aligned) + ___per_cpu_end = .; + + EXIT_DATA + __einitdata = .; + } + __init_data_lma = LOADADDR(.init.data); + __init_data_len = SIZEOF(.init.data); + __init_data_end = .; + + .text_l1 L1_CODE_START : AT(__init_data_lma + __init_data_len) +#endif { . = ALIGN(4); __stext_l1 = .; @@ -159,9 +188,11 @@ SECTIONS . = ALIGN(4); __etext_l1 = .; } - ASSERT (SIZEOF(.text_l1) <= L1_CODE_LENGTH, "L1 text overflow!") + __text_l1_lma = LOADADDR(.text_l1); + __text_l1_len = SIZEOF(.text_l1); + ASSERT (__text_l1_len <= L1_CODE_LENGTH, "L1 text overflow!") - .data_l1 L1_DATA_A_START : AT(LOADADDR(.text_l1) + SIZEOF(.text_l1)) + .data_l1 L1_DATA_A_START : AT(__text_l1_lma + __text_l1_len) { . = ALIGN(4); __sdata_l1 = .; @@ -177,9 +208,11 @@ SECTIONS . = ALIGN(4); __ebss_l1 = .; } - ASSERT (SIZEOF(.data_l1) <= L1_DATA_A_LENGTH, "L1 data A overflow!") + __data_l1_lma = LOADADDR(.data_l1); + __data_l1_len = SIZEOF(.data_l1); + ASSERT (__data_l1_len <= L1_DATA_A_LENGTH, "L1 data A overflow!") - .data_b_l1 L1_DATA_B_START : AT(LOADADDR(.data_l1) + SIZEOF(.data_l1)) + .data_b_l1 L1_DATA_B_START : AT(__data_l1_lma + __data_l1_len) { . = ALIGN(4); __sdata_b_l1 = .; @@ -192,11 +225,11 @@ SECTIONS . = ALIGN(4); __ebss_b_l1 = .; } - ASSERT (SIZEOF(.data_b_l1) <= L1_DATA_B_LENGTH, "L1 data B overflow!") + __data_b_l1_lma = LOADADDR(.data_b_l1); + __data_b_l1_len = SIZEOF(.data_b_l1); + ASSERT (__data_b_l1_len <= L1_DATA_B_LENGTH, "L1 data B overflow!") - __l2_lma_start = LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1); - - .text_data_l2 L2_START : AT(LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1)) + .text_data_l2 L2_START : AT(__data_b_l1_lma + __data_b_l1_len) { . = ALIGN(4); __stext_l2 = .; @@ -218,12 +251,18 @@ SECTIONS . = ALIGN(4); __ebss_l2 = .; } - ASSERT (SIZEOF(.text_data_l2) <= L2_LENGTH, "L2 overflow!") + __l2_lma = LOADADDR(.text_data_l2); + __l2_len = SIZEOF(.text_data_l2); + ASSERT (__l2_len <= L2_LENGTH, "L2 overflow!") /* Force trailing alignment of our init section so that when we * free our init memory, we don't leave behind a partial page. */ - . = LOADADDR(.text_data_l2) + SIZEOF(.text_data_l2); +#ifdef CONFIG_RAMKERNEL + . = __l2_lma + __l2_len; +#else + . = __init_data_end; +#endif . = ALIGN(PAGE_SIZE); ___init_end = .; |