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-rw-r--r--arch/mips/cavium-octeon/smp.c170
1 files changed, 85 insertions, 85 deletions
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
index 6d99b9d8887d..391cefe556b3 100644
--- a/arch/mips/cavium-octeon/smp.c
+++ b/arch/mips/cavium-octeon/smp.c
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2008 Cavium Networks
+ * Copyright (C) 2004-2008, 2009, 2010 Cavium Networks
*/
#include <linux/cpu.h>
#include <linux/init.h>
@@ -27,7 +27,8 @@ volatile unsigned long octeon_processor_sp;
volatile unsigned long octeon_processor_gp;
#ifdef CONFIG_HOTPLUG_CPU
-static unsigned int InitTLBStart_addr;
+uint64_t octeon_bootloader_entry_addr;
+EXPORT_SYMBOL(octeon_bootloader_entry_addr);
#endif
static irqreturn_t mailbox_interrupt(int irq, void *dev_id)
@@ -80,20 +81,13 @@ static inline void octeon_send_ipi_mask(const struct cpumask *mask,
static void octeon_smp_hotplug_setup(void)
{
#ifdef CONFIG_HOTPLUG_CPU
- uint32_t labi_signature;
-
- labi_signature =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- labi_signature)));
- if (labi_signature != LABI_SIGNATURE)
- pr_err("The bootloader version on this board is incorrect\n");
- InitTLBStart_addr =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- InitTLBStart_addr)));
+ struct linux_app_boot_info *labi;
+
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
+ if (labi->labi_signature != LABI_SIGNATURE)
+ panic("The bootloader version on this board is incorrect.");
+
+ octeon_bootloader_entry_addr = labi->InitTLBStart_addr;
#endif
}
@@ -102,24 +96,47 @@ static void octeon_smp_setup(void)
const int coreid = cvmx_get_core_num();
int cpus;
int id;
-
int core_mask = octeon_get_boot_coremask();
+#ifdef CONFIG_HOTPLUG_CPU
+ unsigned int num_cores = cvmx_octeon_num_cores();
+#endif
+
+ /* The present CPUs are initially just the boot cpu (CPU 0). */
+ for (id = 0; id < NR_CPUS; id++) {
+ set_cpu_possible(id, id == 0);
+ set_cpu_present(id, id == 0);
+ }
- cpus_clear(cpu_possible_map);
__cpu_number_map[coreid] = 0;
__cpu_logical_map[0] = coreid;
- cpu_set(0, cpu_possible_map);
+ /* The present CPUs get the lowest CPU numbers. */
cpus = 1;
- for (id = 0; id < 16; id++) {
+ for (id = 0; id < NR_CPUS; id++) {
if ((id != coreid) && (core_mask & (1 << id))) {
- cpu_set(cpus, cpu_possible_map);
+ set_cpu_possible(cpus, true);
+ set_cpu_present(cpus, true);
__cpu_number_map[id] = cpus;
__cpu_logical_map[cpus] = id;
cpus++;
}
}
- cpu_present_map = cpu_possible_map;
+
+#ifdef CONFIG_HOTPLUG_CPU
+ /*
+ * The possible CPUs are all those present on the chip. We
+ * will assign CPU numbers for possible cores as well. Cores
+ * are always consecutively numberd from 0.
+ */
+ for (id = 0; id < num_cores && id < NR_CPUS; id++) {
+ if (!(core_mask & (1 << id))) {
+ set_cpu_possible(cpus, true);
+ __cpu_number_map[id] = cpus;
+ __cpu_logical_map[cpus] = id;
+ cpus++;
+ }
+ }
+#endif
octeon_smp_hotplug_setup();
}
@@ -158,18 +175,21 @@ static void octeon_init_secondary(void)
{
const int coreid = cvmx_get_core_num();
union cvmx_ciu_intx_sum0 interrupt_enable;
+ unsigned int sr;
#ifdef CONFIG_HOTPLUG_CPU
- unsigned int cur_exception_base;
-
- cur_exception_base = cvmx_read64_uint32(
- CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- cur_exception_base)));
- /* cur_exception_base is incremented in bootloader after setting */
- write_c0_ebase((unsigned int)(cur_exception_base - EXCEPTION_BASE_INCR));
+ struct linux_app_boot_info *labi;
+
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
+
+ if (labi->labi_signature != LABI_SIGNATURE)
+ panic("The bootloader version on this board is incorrect.");
#endif
+
+ sr = set_c0_status(ST0_BEV);
+ write_c0_ebase((u32)ebase);
+ write_c0_status(sr);
+
octeon_check_cpu_bist();
octeon_init_cvmcount();
/*
@@ -276,8 +296,8 @@ static int octeon_cpu_disable(void)
static void octeon_cpu_die(unsigned int cpu)
{
int coreid = cpu_logical_map(cpu);
- uint32_t avail_coremask;
- struct cvmx_bootmem_named_block_desc *block_desc;
+ uint32_t mask, new_mask;
+ const struct cvmx_bootmem_named_block_desc *block_desc;
while (per_cpu(cpu_state, cpu) != CPU_DEAD)
cpu_relax();
@@ -286,52 +306,40 @@ static void octeon_cpu_die(unsigned int cpu)
* This is a bit complicated strategics of getting/settig available
* cores mask, copied from bootloader
*/
+
+ mask = 1 << coreid;
/* LINUX_APP_BOOT_BLOCK is initialized in bootoct binary */
block_desc = cvmx_bootmem_find_named_block(LINUX_APP_BOOT_BLOCK_NAME);
if (!block_desc) {
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof
- (struct linux_app_boot_info,
- avail_coremask)));
- } else { /* alternative, already initialized */
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- block_desc->base_addr +
- AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK));
- }
+ struct linux_app_boot_info *labi;
- avail_coremask |= 1 << coreid;
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
- /* Setting avail_coremask for bootoct binary */
- if (!block_desc) {
- cvmx_write64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- avail_coremask)),
- avail_coremask);
- } else {
- cvmx_write64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- block_desc->base_addr +
- AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK),
- avail_coremask);
+ labi->avail_coremask |= mask;
+ new_mask = labi->avail_coremask;
+ } else { /* alternative, already initialized */
+ uint32_t *p = (uint32_t *)PHYS_TO_XKSEG_CACHED(block_desc->base_addr +
+ AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK);
+ *p |= mask;
+ new_mask = *p;
}
- pr_info("Reset core %d. Available Coremask = %x\n", coreid,
- avail_coremask);
+ pr_info("Reset core %d. Available Coremask = 0x%x \n", coreid, new_mask);
+ mb();
cvmx_write_csr(CVMX_CIU_PP_RST, 1 << coreid);
cvmx_write_csr(CVMX_CIU_PP_RST, 0);
}
void play_dead(void)
{
- int coreid = cvmx_get_core_num();
+ int cpu = cpu_number_map(cvmx_get_core_num());
idle_task_exit();
octeon_processor_boot = 0xff;
- per_cpu(cpu_state, coreid) = CPU_DEAD;
+ per_cpu(cpu_state, cpu) = CPU_DEAD;
+
+ mb();
while (1) /* core will be reset here */
;
@@ -344,29 +352,27 @@ static void start_after_reset(void)
kernel_entry(0, 0, 0); /* set a2 = 0 for secondary core */
}
-int octeon_update_boot_vector(unsigned int cpu)
+static int octeon_update_boot_vector(unsigned int cpu)
{
int coreid = cpu_logical_map(cpu);
- unsigned int avail_coremask;
- struct cvmx_bootmem_named_block_desc *block_desc;
+ uint32_t avail_coremask;
+ const struct cvmx_bootmem_named_block_desc *block_desc;
struct boot_init_vector *boot_vect =
- (struct boot_init_vector *) cvmx_phys_to_ptr(0x0 +
- BOOTLOADER_BOOT_VECTOR);
+ (struct boot_init_vector *)PHYS_TO_XKSEG_CACHED(BOOTLOADER_BOOT_VECTOR);
block_desc = cvmx_bootmem_find_named_block(LINUX_APP_BOOT_BLOCK_NAME);
if (!block_desc) {
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- avail_coremask)));
+ struct linux_app_boot_info *labi;
+
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
+
+ avail_coremask = labi->avail_coremask;
+ labi->avail_coremask &= ~(1 << coreid);
} else { /* alternative, already initialized */
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- block_desc->base_addr +
- AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK));
+ avail_coremask = *(uint32_t *)PHYS_TO_XKSEG_CACHED(
+ block_desc->base_addr + AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK);
}
if (!(avail_coremask & (1 << coreid))) {
@@ -377,9 +383,9 @@ int octeon_update_boot_vector(unsigned int cpu)
boot_vect[coreid].app_start_func_addr =
(uint32_t) (unsigned long) start_after_reset;
- boot_vect[coreid].code_addr = InitTLBStart_addr;
+ boot_vect[coreid].code_addr = octeon_bootloader_entry_addr;
- CVMX_SYNC;
+ mb();
cvmx_write_csr(CVMX_CIU_NMI, (1 << coreid) & avail_coremask);
@@ -405,17 +411,11 @@ static int __cpuinit octeon_cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
-static struct notifier_block __cpuinitdata octeon_cpu_notifier = {
- .notifier_call = octeon_cpu_callback,
-};
-
static int __cpuinit register_cavium_notifier(void)
{
- register_hotcpu_notifier(&octeon_cpu_notifier);
-
+ hotcpu_notifier(octeon_cpu_callback, 0);
return 0;
}
-
late_initcall(register_cavium_notifier);
#endif /* CONFIG_HOTPLUG_CPU */