From dae2cdf3e25bf1c63f8012ae19c133e3b3b187ca Mon Sep 17 00:00:00 2001
From: Kyle McMartin
Date: Mon, 28 Jul 2008 21:14:50 -0400
Subject: parisc: add arch/parisc/kernel/.gitignore

---
 arch/parisc/kernel/.gitignore | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 arch/parisc/kernel/.gitignore

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/kernel/.gitignore b/arch/parisc/kernel/.gitignore
new file mode 100644
index 000000000000..c5f676c3c224
--- /dev/null
+++ b/arch/parisc/kernel/.gitignore
@@ -0,0 +1 @@
+vmlinux.lds
-- 
cgit v1.2.3-55-g7522


From 6c86cb8237bf08443806089130dc108051569a93 Mon Sep 17 00:00:00 2001
From: Kyle McMartin
Date: Mon, 28 Jul 2008 22:52:18 -0400
Subject: parisc: move pdc_result to real2.S

---
 arch/parisc/kernel/asm-offsets.c |  3 +++
 arch/parisc/kernel/firmware.c    |  4 ++--
 arch/parisc/kernel/real2.S       | 12 ++++++++++++
 include/asm-parisc/pdc.h         |  3 +++
 4 files changed, 20 insertions(+), 2 deletions(-)

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c
index 3efc0b73e4ff..699cf8ef2118 100644
--- a/arch/parisc/kernel/asm-offsets.c
+++ b/arch/parisc/kernel/asm-offsets.c
@@ -290,5 +290,8 @@ int main(void)
 	DEFINE(EXCDATA_IP, offsetof(struct exception_data, fault_ip));
 	DEFINE(EXCDATA_SPACE, offsetof(struct exception_data, fault_space));
 	DEFINE(EXCDATA_ADDR, offsetof(struct exception_data, fault_addr));
+	BLANK();
+	DEFINE(ASM_PDC_RESULT_SIZE, NUM_PDC_RESULT * sizeof(unsigned long));
+	BLANK();
 	return 0;
 }
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 7177a6cd1b7f..99a9e505edf9 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -71,8 +71,8 @@
 #include <asm/processor.h>	/* for boot_cpu_data */
 
 static DEFINE_SPINLOCK(pdc_lock);
-static unsigned long pdc_result[32] __attribute__ ((aligned (8)));
-static unsigned long pdc_result2[32] __attribute__ ((aligned (8)));
+extern unsigned long pdc_result[NUM_PDC_RESULT];
+extern unsigned long pdc_result2[NUM_PDC_RESULT];
 
 #ifdef CONFIG_64BIT
 #define WIDE_FIRMWARE 0x1
diff --git a/arch/parisc/kernel/real2.S b/arch/parisc/kernel/real2.S
index 7a92695d95a6..5f3d3a1f9037 100644
--- a/arch/parisc/kernel/real2.S
+++ b/arch/parisc/kernel/real2.S
@@ -8,12 +8,24 @@
  *
  */
 
+#include <asm/pdc.h>
 #include <asm/psw.h>
 #include <asm/assembly.h>
+#include <asm/asm-offsets.h>
 
 #include <linux/linkage.h>
 
+
 	.section	.bss
+
+	.export pdc_result
+	.export pdc_result2
+	.align 8
+pdc_result:
+	.block	ASM_PDC_RESULT_SIZE
+pdc_result2:
+	.block	ASM_PDC_RESULT_SIZE
+
 	.export real_stack
 	.export real32_stack
 	.export real64_stack
diff --git a/include/asm-parisc/pdc.h b/include/asm-parisc/pdc.h
index 9eaa794c3e4a..46b75f9cce51 100644
--- a/include/asm-parisc/pdc.h
+++ b/include/asm-parisc/pdc.h
@@ -332,6 +332,9 @@
 #define BOOT_CONSOLE_SPA_OFFSET  0x3c4
 #define BOOT_CONSOLE_PATH_OFFSET 0x3a8
 
+/* size of the pdc_result buffer for firmware.c */
+#define NUM_PDC_RESULT	32
+
 #if !defined(__ASSEMBLY__)
 #ifdef __KERNEL__
 
-- 
cgit v1.2.3-55-g7522


From 24b574d052a1996bac42fbd56715ab602092c291 Mon Sep 17 00:00:00 2001
From: Kyle McMartin
Date: Tue, 29 Jul 2008 00:09:22 -0400
Subject: parisc: add pdc_coproc_cfg_unlocked and set_firmware_width_unlocked

These functions are called only when bringing up the monarch cpu,
so it is safe to call them without taking the pdc spinlock. In the
future, this may become relevant for lockdep, since these functions were
taking spinlocks before start_kernel called the lockdep initializers.
---
 arch/parisc/include/asm/pdc.h |  2 ++
 arch/parisc/kernel/firmware.c | 65 +++++++++++++++++++++++++++++--------------
 2 files changed, 46 insertions(+), 21 deletions(-)

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index 46b75f9cce51..c584b00c6074 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -603,6 +603,7 @@ int pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsi
 int pdc_chassis_disp(unsigned long disp);
 int pdc_chassis_warn(unsigned long *warn);
 int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info);
+int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info);
 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
 		  void *iodc_data, unsigned int iodc_data_size);
 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
@@ -641,6 +642,7 @@ int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
 #endif
 
 void set_firmware_width(void);
+void set_firmware_width_unlocked(void);
 int pdc_do_firm_test_reset(unsigned long ftc_bitmap);
 int pdc_do_reset(void);
 int pdc_soft_power_info(unsigned long *power_reg);
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 99a9e505edf9..03f26bd75bd8 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -150,26 +150,40 @@ static void convert_to_wide(unsigned long *addr)
 #endif
 }
 
+#ifdef CONFIG_64BIT
+void __init set_firmware_width_unlocked(void)
+{
+	int ret;
+
+	ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
+		__pa(pdc_result), 0);
+	convert_to_wide(pdc_result);
+	if (pdc_result[0] != NARROW_FIRMWARE)
+		parisc_narrow_firmware = 0;
+}
+	
 /**
  * set_firmware_width - Determine if the firmware is wide or narrow.
  * 
- * This function must be called before any pdc_* function that uses the convert_to_wide
- * function.
+ * This function must be called before any pdc_* function that uses the
+ * convert_to_wide function.
  */
 void __init set_firmware_width(void)
 {
-#ifdef CONFIG_64BIT
-	int retval;
 	unsigned long flags;
+	spin_lock_irqsave(&pdc_lock, flags);
+	set_firmware_width_unlocked();
+	spin_unlock_irqrestore(&pdc_lock, flags);
+}
+#else
+void __init set_firmware_width_unlocked(void) {
+	return;
+}
 
-        spin_lock_irqsave(&pdc_lock, flags);
-	retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
-	convert_to_wide(pdc_result);
-	if(pdc_result[0] != NARROW_FIRMWARE)
-		parisc_narrow_firmware = 0;
-        spin_unlock_irqrestore(&pdc_lock, flags);
-#endif
+void __init set_firmware_width(void) {
+	return;
 }
+#endif /*CONFIG_64BIT*/
 
 /**
  * pdc_emergency_unlock - Unlock the linux pdc lock
@@ -288,6 +302,20 @@ int pdc_chassis_warn(unsigned long *warn)
 	return retval;
 }
 
+int __init pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
+{
+	int ret;
+
+	ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
+	convert_to_wide(pdc_result);
+	pdc_coproc_info->ccr_functional = pdc_result[0];
+	pdc_coproc_info->ccr_present = pdc_result[1];
+	pdc_coproc_info->revision = pdc_result[17];
+	pdc_coproc_info->model = pdc_result[18];
+
+	return ret;
+}
+
 /**
  * pdc_coproc_cfg - To identify coprocessors attached to the processor.
  * @pdc_coproc_info: Return buffer address.
@@ -297,19 +325,14 @@ int pdc_chassis_warn(unsigned long *warn)
  */
 int __init pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
 {
-        int retval;
+	int ret;
 	unsigned long flags;
 
-        spin_lock_irqsave(&pdc_lock, flags);
-        retval = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
-        convert_to_wide(pdc_result);
-        pdc_coproc_info->ccr_functional = pdc_result[0];
-        pdc_coproc_info->ccr_present = pdc_result[1];
-        pdc_coproc_info->revision = pdc_result[17];
-        pdc_coproc_info->model = pdc_result[18];
-        spin_unlock_irqrestore(&pdc_lock, flags);
+	spin_lock_irqsave(&pdc_lock, flags);
+	ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
+	spin_unlock_irqrestore(&pdc_lock, flags);
 
-        return retval;
+	return ret;
 }
 
 /**
-- 
cgit v1.2.3-55-g7522


From 089d55289db5d58d938d73b47a415b2b82ee19ac Mon Sep 17 00:00:00 2001
From: Kyle McMartin
Date: Tue, 29 Jul 2008 00:11:13 -0400
Subject: parisc: hijack jump to start_kernel

Bang in our own start_parisc call, which initializes the PDC
width, and turns on the FPU.

Previously, if CONFIG_PRINTK_TIME was on, we'd attempt to use
the FPU before we had enabled it, resulting in a difficult
to diagnose panic.

This patch causes init_per_cpu to redundantly set these for
cpu0, but this is harmless.
---
 arch/parisc/kernel/head.S  |  2 +-
 arch/parisc/kernel/setup.c | 27 ++++++++++++++++++++++++++-
 2 files changed, 27 insertions(+), 2 deletions(-)

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S
index a84e31e82876..0e3d9f9b9e33 100644
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -121,7 +121,7 @@ $pgt_fill_loop:
 	copy		%r0,%r2
 
 	/* And the RFI Target address too */
-	load32		start_kernel,%r11
+	load32		start_parisc,%r11
 
 	/* And the initial task pointer */
 	load32		init_thread_union,%r6
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 39e7c5a5946a..a59b71efdbe5 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -368,6 +368,31 @@ static int __init parisc_init(void)
 
 	return 0;
 }
-
 arch_initcall(parisc_init);
 
+void start_parisc(void)
+{
+	extern void start_kernel(void);
+
+	int ret, cpunum;
+	struct pdc_coproc_cfg coproc_cfg;
+
+	cpunum = smp_processor_id();
+
+	set_firmware_width_unlocked();
+
+	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
+	if (ret >= 0 && coproc_cfg.ccr_functional) {
+		mtctl(coproc_cfg.ccr_functional, 10);
+
+		cpu_data[cpunum].fp_rev = coproc_cfg.revision;
+		cpu_data[cpunum].fp_model = coproc_cfg.model;
+
+		asm volatile ("fstd	%fr0,8(%sp)");
+	} else {
+		panic("must have an fpu to boot linux");
+	}
+
+	start_kernel();
+	// not reached
+}
-- 
cgit v1.2.3-55-g7522


From 0be7d1fe4361bb9f2ebbd6fa394687cbe4bea950 Mon Sep 17 00:00:00 2001
From: Kyle McMartin
Date: Sat, 9 Aug 2008 14:38:18 -0400
Subject: parisc: add new syscalls

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
---
 arch/parisc/include/asm/unistd.h   | 10 ++++++++--
 arch/parisc/kernel/syscall_table.S |  6 ++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index a7d857f0e4f4..ef26b009dc5d 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -801,8 +801,14 @@
 #define __NR_timerfd_create	(__NR_Linux + 306)
 #define __NR_timerfd_settime	(__NR_Linux + 307)
 #define __NR_timerfd_gettime	(__NR_Linux + 308)
-
-#define __NR_Linux_syscalls	(__NR_timerfd_gettime + 1)
+#define __NR_signalfd4		(__NR_Linux + 309)
+#define __NR_eventfd2		(__NR_Linux + 310)
+#define __NR_epoll_create1	(__NR_Linux + 311)
+#define __NR_dup3		(__NR_Linux + 312)
+#define __NR_pipe2		(__NR_Linux + 313)
+#define __NR_inotify_init1	(__NR_Linux + 314)
+
+#define __NR_Linux_syscalls	(__NR_inotify_init1 + 1)
 
 
 #define __IGNORE_select		/* newselect */
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 6b5ac38f5a99..6084667eacf9 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -407,6 +407,12 @@
 	ENTRY_SAME(timerfd_create)
 	ENTRY_COMP(timerfd_settime)
 	ENTRY_COMP(timerfd_gettime)
+	ENTRY_COMP(signalfd4)
+	ENTRY_SAME(eventfd2)		/* 310 */
+	ENTRY_SAME(epoll_create1)
+	ENTRY_SAME(dup3)
+	ENTRY_SAME(pipe2)
+	ENTRY_SAME(inotify_init1)
 
 	/* Nothing yet */
 
-- 
cgit v1.2.3-55-g7522


From f0514ae323f19ba1ad4bea4174ea274c812f7eee Mon Sep 17 00:00:00 2001
From: James Bottomley
Date: Thu, 11 Sep 2008 10:17:23 -0400
Subject: parisc: initialize unwinder much earlier

The unwinder was being initialized way too late to be any use
debugging early boot crashes. Instead of relying on module_init
initcalls to initialize it, let's do it explicitly as early as
we can.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
---
 arch/parisc/include/asm/unwind.h | 2 ++
 arch/parisc/kernel/setup.c       | 2 ++
 arch/parisc/kernel/unwind.c      | 4 +---
 3 files changed, 5 insertions(+), 3 deletions(-)

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/include/asm/unwind.h b/arch/parisc/include/asm/unwind.h
index 2f7e6e50a158..52482e4fc20d 100644
--- a/arch/parisc/include/asm/unwind.h
+++ b/arch/parisc/include/asm/unwind.h
@@ -74,4 +74,6 @@ void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *r
 int unwind_once(struct unwind_frame_info *info);
 int unwind_to_user(struct unwind_frame_info *info);
 
+int unwind_init(void);
+
 #endif
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index a59b71efdbe5..7d27853ff8c8 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -44,6 +44,7 @@
 #include <asm/pdc_chassis.h>
 #include <asm/io.h>
 #include <asm/setup.h>
+#include <asm/unwind.h>
 
 static char __initdata command_line[COMMAND_LINE_SIZE];
 
@@ -123,6 +124,7 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_64BIT
 	extern int parisc_narrow_firmware;
 #endif
+	unwind_init();
 
 	init_per_cpu(smp_processor_id());	/* Set Modes & Enable FP */
 
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 701b2d2d8882..6773c582e457 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -170,7 +170,7 @@ void unwind_table_remove(struct unwind_table *table)
 }
 
 /* Called from setup_arch to import the kernel unwind info */
-static int unwind_init(void)
+int unwind_init(void)
 {
 	long start, stop;
 	register unsigned long gp __asm__ ("r27");
@@ -417,5 +417,3 @@ int unwind_to_user(struct unwind_frame_info *info)
 
 	return ret;
 }
-
-module_init(unwind_init);
-- 
cgit v1.2.3-55-g7522


From 9eb1686423756f4dfb0ad8bfb02bb8bf1b89e50a Mon Sep 17 00:00:00 2001
From: Kyle McMartin
Date: Wed, 10 Sep 2008 14:24:07 +0000
Subject: parisc: add rtc platform driver

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
---
 arch/parisc/Kconfig       |   2 +
 arch/parisc/kernel/time.c |  20 ++++++++-
 drivers/rtc/Kconfig       |   8 ++++
 drivers/rtc/Makefile      |   1 +
 drivers/rtc/rtc-parisc.c  | 111 ++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 141 insertions(+), 1 deletion(-)
 create mode 100644 drivers/rtc/rtc-parisc.c

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index a7d4fd353c2b..0a8ac703dbec 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -9,6 +9,8 @@ config PARISC
 	def_bool y
 	select HAVE_IDE
 	select HAVE_OPROFILE
+	select RTC_CLASS
+	select RTC_DRV_PARISC
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
 	  in many of their workstations & servers (HP9000 700 and 800 series,
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 24be86bba94d..4d09203bc693 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -23,6 +23,7 @@
 #include <linux/smp.h>
 #include <linux/profile.h>
 #include <linux/clocksource.h>
+#include <linux/platform_device.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -215,6 +216,24 @@ void __init start_cpu_itimer(void)
 	cpu_data[cpu].it_value = next_tick;
 }
 
+struct platform_device rtc_parisc_dev = {
+	.name = "rtc-parisc",
+	.id = -1,
+};
+
+static int __init rtc_init(void)
+{
+	int ret;
+
+	ret = platform_device_register(&rtc_parisc_dev);
+	if (ret < 0)
+		printk(KERN_ERR "unable to register rtc device...\n");
+
+	/* not necessarily an error */
+	return 0;
+}
+module_init(rtc_init);
+
 void __init time_init(void)
 {
 	static struct pdc_tod tod_data;
@@ -245,4 +264,3 @@ void __init time_init(void)
 		xtime.tv_nsec = 0;
 	}
 }
-
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 9a9755c92fad..30d40fe194a8 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -575,6 +575,14 @@ config RTC_DRV_RS5C313
 	help
 	  If you say yes here you get support for the Ricoh RS5C313 RTC chips.
 
+config RTC_DRV_PARISC
+	tristate "PA-RISC firmware RTC support"
+	depends on PARISC
+	help
+	  Say Y or M here to enable RTC support on PA-RISC systems using
+	  firmware calls. If you do not know what you are doing, you should
+	  just say Y.
+
 config RTC_DRV_PPC
        tristate "PowerPC machine dependent RTC support"
        depends on PPC_MERGE
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 18622ef84cab..180ddacde730 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_RTC_DRV_PCF8563)	+= rtc-pcf8563.o
 obj-$(CONFIG_RTC_DRV_PCF8583)	+= rtc-pcf8583.o
 obj-$(CONFIG_RTC_DRV_PL030)	+= rtc-pl030.o
 obj-$(CONFIG_RTC_DRV_PL031)	+= rtc-pl031.o
+obj-$(CONFIG_RTC_DRV_PARISC)	+= rtc-parisc.o
 obj-$(CONFIG_RTC_DRV_PPC)	+= rtc-ppc.o
 obj-$(CONFIG_RTC_DRV_R9701)	+= rtc-r9701.o
 obj-$(CONFIG_RTC_DRV_RS5C313)	+= rtc-rs5c313.o
diff --git a/drivers/rtc/rtc-parisc.c b/drivers/rtc/rtc-parisc.c
new file mode 100644
index 000000000000..346d633655e7
--- /dev/null
+++ b/drivers/rtc/rtc-parisc.c
@@ -0,0 +1,111 @@
+/* rtc-parisc: RTC for HP PA-RISC firmware
+ *
+ * Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/platform_device.h>
+
+#include <asm/rtc.h>
+
+/* as simple as can be, and no simpler. */
+struct parisc_rtc {
+	struct rtc_device *rtc;
+	spinlock_t lock;
+};
+
+static int parisc_get_time(struct device *dev, struct rtc_time *tm)
+{
+	struct parisc_rtc *p = dev_get_drvdata(dev);
+	unsigned long flags, ret;
+
+	spin_lock_irqsave(&p->lock, flags);
+	ret = get_rtc_time(tm);
+	spin_unlock_irqrestore(&p->lock, flags);
+
+	if (ret & RTC_BATT_BAD)
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
+static int parisc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct parisc_rtc *p = dev_get_drvdata(dev);
+	unsigned long flags, ret;
+
+	spin_lock_irqsave(&p->lock, flags);
+	ret = set_rtc_time(tm);
+	spin_unlock_irqrestore(&p->lock, flags);
+
+	if (ret < 0)
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
+static const struct rtc_class_ops parisc_rtc_ops = {
+	.read_time = parisc_get_time,
+	.set_time = parisc_set_time,
+};
+
+static int __devinit parisc_rtc_probe(struct platform_device *dev)
+{
+	struct parisc_rtc *p;
+
+	p = kzalloc(sizeof (*p), GFP_KERNEL);
+	if (!p)
+		return -ENOMEM;
+
+	spin_lock_init(&p->lock);
+
+	p->rtc = rtc_device_register("rtc-parisc", &dev->dev, &parisc_rtc_ops,
+					THIS_MODULE);
+	if (IS_ERR(p->rtc)) {
+		int err = PTR_ERR(p->rtc);
+		kfree(p);
+		return err;
+	}
+
+	platform_set_drvdata(dev, p);
+
+	return 0;
+}
+
+static int __devexit parisc_rtc_remove(struct platform_device *dev)
+{
+	struct parisc_rtc *p = platform_get_drvdata(dev);
+
+	rtc_device_unregister(p->rtc);
+	kfree(p);
+
+	return 0;
+}
+
+static struct platform_driver parisc_rtc_driver = {
+	.driver = {
+		.name = "rtc-parisc",
+		.owner = THIS_MODULE,
+	},
+	.probe = parisc_rtc_probe,
+	.remove = __devexit_p(parisc_rtc_remove),
+};
+
+static int __init parisc_rtc_init(void)
+{
+	return platform_driver_register(&parisc_rtc_driver);
+}
+
+static void __exit parisc_rtc_fini(void)
+{
+	platform_driver_unregister(&parisc_rtc_driver);
+}
+
+module_init(parisc_rtc_init);
+module_exit(parisc_rtc_fini);
+
+MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("HP PA-RISC RTC driver");
-- 
cgit v1.2.3-55-g7522


From 81e192d6ce303b6792aa38ff35f41a1a7357f23a Mon Sep 17 00:00:00 2001
From: Helge Deller
Date: Fri, 17 Oct 2008 18:48:36 +0000
Subject: parisc: convert to generic compat_sys_ptrace

This patch does the compat_sys_ptrace conversion for parisc.
In addition it does convert the parisc ptrace code to use the
architecture-independent ptrace infrastructure instead of own coding.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
---
 arch/parisc/include/asm/ptrace.h   |  10 +
 arch/parisc/kernel/ptrace.c        | 429 +++++++++++++++----------------------
 arch/parisc/kernel/syscall_table.S |   2 +-
 3 files changed, 183 insertions(+), 258 deletions(-)

(limited to 'arch/parisc/kernel')

diff --git a/arch/parisc/include/asm/ptrace.h b/arch/parisc/include/asm/ptrace.h
index 3e94c5d85ff5..afa5333187b4 100644
--- a/arch/parisc/include/asm/ptrace.h
+++ b/arch/parisc/include/asm/ptrace.h
@@ -47,6 +47,16 @@ struct pt_regs {
 
 #define task_regs(task) ((struct pt_regs *) ((char *)(task) + TASK_REGS))
 
+#define __ARCH_WANT_COMPAT_SYS_PTRACE
+
+struct task_struct;
+#define arch_has_single_step()	1
+void user_disable_single_step(struct task_struct *task);
+void user_enable_single_step(struct task_struct *task);
+
+#define arch_has_block_step()	1
+void user_enable_block_step(struct task_struct *task);
+
 /* XXX should we use iaoq[1] or iaoq[0] ? */
 #define user_mode(regs)			(((regs)->iaoq[0] & 3) ? 1 : 0)
 #define user_space(regs)		(((regs)->iasq[1] != 0) ? 1 : 0)
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
index 49c637970789..90904f9dfc50 100644
--- a/arch/parisc/kernel/ptrace.c
+++ b/arch/parisc/kernel/ptrace.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2000 Hewlett-Packard Co, Linuxcare Inc.
  * Copyright (C) 2000 Matthew Wilcox <matthew@wil.cx>
  * Copyright (C) 2000 David Huggins-Daines <dhd@debian.org>
+ * Copyright (C) 2008 Helge Deller <deller@gmx.de>
  */
 
 #include <linux/kernel.h>
@@ -27,15 +28,149 @@
 /* PSW bits we allow the debugger to modify */
 #define USER_PSW_BITS	(PSW_N | PSW_V | PSW_CB)
 
-#undef DEBUG_PTRACE
+/*
+ * Called by kernel/ptrace.c when detaching..
+ *
+ * Make sure single step bits etc are not set.
+ */
+void ptrace_disable(struct task_struct *task)
+{
+	task->ptrace &= ~(PT_SINGLESTEP|PT_BLOCKSTEP);
 
-#ifdef DEBUG_PTRACE
-#define DBG(x...)	printk(x)
-#else
-#define DBG(x...)
-#endif
+	/* make sure the trap bits are not set */
+	pa_psw(task)->r = 0;
+	pa_psw(task)->t = 0;
+	pa_psw(task)->h = 0;
+	pa_psw(task)->l = 0;
+}
+
+/*
+ * The following functions are called by ptrace_resume() when
+ * enabling or disabling single/block tracing.
+ */
+void user_disable_single_step(struct task_struct *task)
+{
+	ptrace_disable(task);
+}
+
+void user_enable_single_step(struct task_struct *task)
+{
+	task->ptrace &= ~PT_BLOCKSTEP;
+	task->ptrace |= PT_SINGLESTEP;
+
+	if (pa_psw(task)->n) {
+		struct siginfo si;
+
+		/* Nullified, just crank over the queue. */
+		task_regs(task)->iaoq[0] = task_regs(task)->iaoq[1];
+		task_regs(task)->iasq[0] = task_regs(task)->iasq[1];
+		task_regs(task)->iaoq[1] = task_regs(task)->iaoq[0] + 4;
+		pa_psw(task)->n = 0;
+		pa_psw(task)->x = 0;
+		pa_psw(task)->y = 0;
+		pa_psw(task)->z = 0;
+		pa_psw(task)->b = 0;
+		ptrace_disable(task);
+		/* Don't wake up the task, but let the
+		   parent know something happened. */
+		si.si_code = TRAP_TRACE;
+		si.si_addr = (void __user *) (task_regs(task)->iaoq[0] & ~3);
+		si.si_signo = SIGTRAP;
+		si.si_errno = 0;
+		force_sig_info(SIGTRAP, &si, task);
+		/* notify_parent(task, SIGCHLD); */
+		return;
+	}
+
+	/* Enable recovery counter traps.  The recovery counter
+	 * itself will be set to zero on a task switch.  If the
+	 * task is suspended on a syscall then the syscall return
+	 * path will overwrite the recovery counter with a suitable
+	 * value such that it traps once back in user space.  We
+	 * disable interrupts in the tasks PSW here also, to avoid
+	 * interrupts while the recovery counter is decrementing.
+	 */
+	pa_psw(task)->r = 1;
+	pa_psw(task)->t = 0;
+	pa_psw(task)->h = 0;
+	pa_psw(task)->l = 0;
+}
+
+void user_enable_block_step(struct task_struct *task)
+{
+	task->ptrace &= ~PT_SINGLESTEP;
+	task->ptrace |= PT_BLOCKSTEP;
+
+	/* Enable taken branch trap. */
+	pa_psw(task)->r = 0;
+	pa_psw(task)->t = 1;
+	pa_psw(task)->h = 0;
+	pa_psw(task)->l = 0;
+}
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+	unsigned long tmp;
+	long ret = -EIO;
 
-#ifdef CONFIG_64BIT
+	switch (request) {
+
+	/* Read the word at location addr in the USER area.  For ptraced
+	   processes, the kernel saves all regs on a syscall. */
+	case PTRACE_PEEKUSR:
+		if ((addr & (sizeof(long)-1)) ||
+		    (unsigned long) addr >= sizeof(struct pt_regs))
+			break;
+		tmp = *(unsigned long *) ((char *) task_regs(child) + addr);
+		ret = put_user(tmp, (unsigned long *) data);
+		break;
+
+	/* Write the word at location addr in the USER area.  This will need
+	   to change when the kernel no longer saves all regs on a syscall.
+	   FIXME.  There is a problem at the moment in that r3-r18 are only
+	   saved if the process is ptraced on syscall entry, and even then
+	   those values are overwritten by actual register values on syscall
+	   exit. */
+	case PTRACE_POKEUSR:
+		/* Some register values written here may be ignored in
+		 * entry.S:syscall_restore_rfi; e.g. iaoq is written with
+		 * r31/r31+4, and not with the values in pt_regs.
+		 */
+		if (addr == PT_PSW) {
+			/* Allow writing to Nullify, Divide-step-correction,
+			 * and carry/borrow bits.
+			 * BEWARE, if you set N, and then single step, it won't
+			 * stop on the nullified instruction.
+			 */
+			data &= USER_PSW_BITS;
+			task_regs(child)->gr[0] &= ~USER_PSW_BITS;
+			task_regs(child)->gr[0] |= data;
+			ret = 0;
+			break;
+		}
+
+		if ((addr & (sizeof(long)-1)) ||
+		    (unsigned long) addr >= sizeof(struct pt_regs))
+			break;
+		if ((addr >= PT_GR1 && addr <= PT_GR31) ||
+				addr == PT_IAOQ0 || addr == PT_IAOQ1 ||
+				(addr >= PT_FR0 && addr <= PT_FR31 + 4) ||
+				addr == PT_SAR) {
+			*(unsigned long *) ((char *) task_regs(child) + addr) = data;
+			ret = 0;
+		}
+		break;
+
+	default:
+		ret = ptrace_request(child, request, addr, data);
+		break;
+	}
+
+	return ret;
+}
+
+
+#ifdef CONFIG_COMPAT
 
 /* This function is needed to translate 32 bit pt_regs offsets in to
  * 64 bit pt_regs offsets.  For example, a 32 bit gdb under a 64 bit kernel
@@ -61,106 +196,25 @@ static long translate_usr_offset(long offset)
 	else
 		return -1;
 }
-#endif
 
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+			compat_ulong_t addr, compat_ulong_t data)
 {
-	/* make sure the trap bits are not set */
-	pa_psw(child)->r = 0;
-	pa_psw(child)->t = 0;
-	pa_psw(child)->h = 0;
-	pa_psw(child)->l = 0;
-}
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
-	long ret;
-#ifdef DEBUG_PTRACE
-	long oaddr=addr, odata=data;
-#endif
+	compat_uint_t tmp;
+	long ret = -EIO;
 
 	switch (request) {
-	case PTRACE_PEEKTEXT: /* read word at location addr. */ 
-	case PTRACE_PEEKDATA: {
-#ifdef CONFIG_64BIT
-		if (__is_compat_task(child)) {
-			int copied;
-			unsigned int tmp;
-
-			addr &= 0xffffffffL;
-			copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
-			ret = -EIO;
-			if (copied != sizeof(tmp))
-				goto out_tsk;
-			ret = put_user(tmp,(unsigned int *) data);
-			DBG("sys_ptrace(PEEK%s, %d, %lx, %lx) returning %ld, data %x\n",
-				request == PTRACE_PEEKTEXT ? "TEXT" : "DATA",
-				pid, oaddr, odata, ret, tmp);
-		}
-		else
-#endif
-			ret = generic_ptrace_peekdata(child, addr, data);
-		goto out_tsk;
-	}
 
-	/* when I and D space are separate, this will have to be fixed. */
-	case PTRACE_POKETEXT: /* write the word at location addr. */
-	case PTRACE_POKEDATA:
-		ret = 0;
-#ifdef CONFIG_64BIT
-		if (__is_compat_task(child)) {
-			unsigned int tmp = (unsigned int)data;
-			DBG("sys_ptrace(POKE%s, %d, %lx, %lx)\n",
-				request == PTRACE_POKETEXT ? "TEXT" : "DATA",
-				pid, oaddr, odata);
-			addr &= 0xffffffffL;
-			if (access_process_vm(child, addr, &tmp, sizeof(tmp), 1) == sizeof(tmp))
-				goto out_tsk;
-		}
-		else
-#endif
-		{
-			if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-				goto out_tsk;
-		}
-		ret = -EIO;
-		goto out_tsk;
-
-	/* Read the word at location addr in the USER area.  For ptraced
-	   processes, the kernel saves all regs on a syscall. */
-	case PTRACE_PEEKUSR: {
-		ret = -EIO;
-#ifdef CONFIG_64BIT
-		if (__is_compat_task(child)) {
-			unsigned int tmp;
-
-			if (addr & (sizeof(int)-1))
-				goto out_tsk;
-			if ((addr = translate_usr_offset(addr)) < 0)
-				goto out_tsk;
-
-			tmp = *(unsigned int *) ((char *) task_regs(child) + addr);
-			ret = put_user(tmp, (unsigned int *) data);
-			DBG("sys_ptrace(PEEKUSR, %d, %lx, %lx) returning %ld, addr %lx, data %x\n",
-				pid, oaddr, odata, ret, addr, tmp);
-		}
-		else
-#endif
-		{
-			unsigned long tmp;
+	case PTRACE_PEEKUSR:
+		if (addr & (sizeof(compat_uint_t)-1))
+			break;
+		addr = translate_usr_offset(addr);
+		if (addr < 0)
+			break;
 
-			if ((addr & (sizeof(long)-1)) || (unsigned long) addr >= sizeof(struct pt_regs))
-				goto out_tsk;
-			tmp = *(unsigned long *) ((char *) task_regs(child) + addr);
-			ret = put_user(tmp, (unsigned long *) data);
-		}
-		goto out_tsk;
-	}
+		tmp = *(compat_uint_t *) ((char *) task_regs(child) + addr);
+		ret = put_user(tmp, (compat_uint_t *) (unsigned long) data);
+		break;
 
 	/* Write the word at location addr in the USER area.  This will need
 	   to change when the kernel no longer saves all regs on a syscall.
@@ -169,185 +223,46 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	   those values are overwritten by actual register values on syscall
 	   exit. */
 	case PTRACE_POKEUSR:
-		ret = -EIO;
 		/* Some register values written here may be ignored in
 		 * entry.S:syscall_restore_rfi; e.g. iaoq is written with
 		 * r31/r31+4, and not with the values in pt_regs.
 		 */
-		 /* PT_PSW=0, so this is valid for 32 bit processes under 64
-		 * bit kernels.
-		 */
 		if (addr == PT_PSW) {
-			/* PT_PSW=0, so this is valid for 32 bit processes
-			 * under 64 bit kernels.
-			 *
-			 * Allow writing to Nullify, Divide-step-correction,
-			 * and carry/borrow bits.
-			 * BEWARE, if you set N, and then single step, it won't
-			 * stop on the nullified instruction.
+			/* Since PT_PSW==0, it is valid for 32 bit processes
+			 * under 64 bit kernels as well.
 			 */
-			DBG("sys_ptrace(POKEUSR, %d, %lx, %lx)\n",
-				pid, oaddr, odata);
-			data &= USER_PSW_BITS;
-			task_regs(child)->gr[0] &= ~USER_PSW_BITS;
-			task_regs(child)->gr[0] |= data;
-			ret = 0;
-			goto out_tsk;
-		}
-#ifdef CONFIG_64BIT
-		if (__is_compat_task(child)) {
-			if (addr & (sizeof(int)-1))
-				goto out_tsk;
-			if ((addr = translate_usr_offset(addr)) < 0)
-				goto out_tsk;
-			DBG("sys_ptrace(POKEUSR, %d, %lx, %lx) addr %lx\n",
-				pid, oaddr, odata, addr);
+			ret = arch_ptrace(child, request, addr, data);
+		} else {
+			if (addr & (sizeof(compat_uint_t)-1))
+				break;
+			addr = translate_usr_offset(addr);
+			if (addr < 0)
+				break;
 			if (addr >= PT_FR0 && addr <= PT_FR31 + 4) {
 				/* Special case, fp regs are 64 bits anyway */
-				*(unsigned int *) ((char *) task_regs(child) + addr) = data;
+				*(__u64 *) ((char *) task_regs(child) + addr) = data;
 				ret = 0;
 			}
 			else if ((addr >= PT_GR1+4 && addr <= PT_GR31+4) ||
 					addr == PT_IAOQ0+4 || addr == PT_IAOQ1+4 ||
 					addr == PT_SAR+4) {
 				/* Zero the top 32 bits */
-				*(unsigned int *) ((char *) task_regs(child) + addr - 4) = 0;
-				*(unsigned int *) ((char *) task_regs(child) + addr) = data;
+				*(__u32 *) ((char *) task_regs(child) + addr - 4) = 0;
+				*(__u32 *) ((char *) task_regs(child) + addr) = data;
 				ret = 0;
 			}
-			goto out_tsk;
 		}
-		else
-#endif
-		{
-			if ((addr & (sizeof(long)-1)) || (unsigned long) addr >= sizeof(struct pt_regs))
-				goto out_tsk;
-			if ((addr >= PT_GR1 && addr <= PT_GR31) ||
-					addr == PT_IAOQ0 || addr == PT_IAOQ1 ||
-					(addr >= PT_FR0 && addr <= PT_FR31 + 4) ||
-					addr == PT_SAR) {
-				*(unsigned long *) ((char *) task_regs(child) + addr) = data;
-				ret = 0;
-			}
-			goto out_tsk;
-		}
-
-	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
-	case PTRACE_CONT:
-		ret = -EIO;
-		DBG("sys_ptrace(%s)\n",
-			request == PTRACE_SYSCALL ? "SYSCALL" : "CONT");
-		if (!valid_signal(data))
-			goto out_tsk;
-		child->ptrace &= ~(PT_SINGLESTEP|PT_BLOCKSTEP);
-		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;
-		goto out_wake_notrap;
-
-	case PTRACE_KILL:
-		/*
-		 * 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.
-		 */
-		ret = 0;
-		DBG("sys_ptrace(KILL)\n");
-		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
-			goto out_tsk;
-		child->exit_code = SIGKILL;
-		goto out_wake_notrap;
-
-	case PTRACE_SINGLEBLOCK:
-		DBG("sys_ptrace(SINGLEBLOCK)\n");
-		ret = -EIO;
-		if (!valid_signal(data))
-			goto out_tsk;
-		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		child->ptrace &= ~PT_SINGLESTEP;
-		child->ptrace |= PT_BLOCKSTEP;
-		child->exit_code = data;
-
-		/* Enable taken branch trap. */
-		pa_psw(child)->r = 0;
-		pa_psw(child)->t = 1;
-		pa_psw(child)->h = 0;
-		pa_psw(child)->l = 0;
-		goto out_wake;
-
-	case PTRACE_SINGLESTEP:
-		DBG("sys_ptrace(SINGLESTEP)\n");
-		ret = -EIO;
-		if (!valid_signal(data))
-			goto out_tsk;
-
-		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		child->ptrace &= ~PT_BLOCKSTEP;
-		child->ptrace |= PT_SINGLESTEP;
-		child->exit_code = data;
-
-		if (pa_psw(child)->n) {
-			struct siginfo si;
-
-			/* Nullified, just crank over the queue. */
-			task_regs(child)->iaoq[0] = task_regs(child)->iaoq[1];
-			task_regs(child)->iasq[0] = task_regs(child)->iasq[1];
-			task_regs(child)->iaoq[1] = task_regs(child)->iaoq[0] + 4;
-			pa_psw(child)->n = 0;
-			pa_psw(child)->x = 0;
-			pa_psw(child)->y = 0;
-			pa_psw(child)->z = 0;
-			pa_psw(child)->b = 0;
-			ptrace_disable(child);
-			/* Don't wake up the child, but let the
-			   parent know something happened. */
-			si.si_code = TRAP_TRACE;
-			si.si_addr = (void __user *) (task_regs(child)->iaoq[0] & ~3);
-			si.si_signo = SIGTRAP;
-			si.si_errno = 0;
-			force_sig_info(SIGTRAP, &si, child);
-			//notify_parent(child, SIGCHLD);
-			//ret = 0;
-			goto out_wake;
-		}
-
-		/* Enable recovery counter traps.  The recovery counter
-		 * itself will be set to zero on a task switch.  If the
-		 * task is suspended on a syscall then the syscall return
-		 * path will overwrite the recovery counter with a suitable
-		 * value such that it traps once back in user space.  We
-		 * disable interrupts in the childs PSW here also, to avoid
-		 * interrupts while the recovery counter is decrementing.
-		 */
-		pa_psw(child)->r = 1;
-		pa_psw(child)->t = 0;
-		pa_psw(child)->h = 0;
-		pa_psw(child)->l = 0;
-		/* give it a chance to run. */
-		goto out_wake;
-
-	case PTRACE_GETEVENTMSG:
-                ret = put_user(child->ptrace_message, (unsigned int __user *) data);
-		goto out_tsk;
+		break;
 
 	default:
-		ret = ptrace_request(child, request, addr, data);
-		goto out_tsk;
+		ret = compat_ptrace_request(child, request, addr, data);
+		break;
 	}
 
-out_wake_notrap:
-	ptrace_disable(child);
-out_wake:
-	wake_up_process(child);
-	ret = 0;
-out_tsk:
-	DBG("arch_ptrace(%ld, %d, %lx, %lx) returning %ld\n",
-		request, pid, oaddr, odata, ret);
 	return ret;
 }
+#endif
+
 
 void syscall_trace(void)
 {
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 6084667eacf9..4ed01f2d655d 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -87,7 +87,7 @@
 	ENTRY_SAME(setuid)
 	ENTRY_SAME(getuid)
 	ENTRY_COMP(stime)		/* 25 */
-	ENTRY_SAME(ptrace)
+	ENTRY_COMP(ptrace)
 	ENTRY_SAME(alarm)
 	/* see stat comment */
 	ENTRY_COMP(newfstat)
-- 
cgit v1.2.3-55-g7522