X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fia64%2Fkernel%2Fprocess.c;h=355d57970ba31cf3368aa61e5c32c92b81a85029;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=ebb71f3d6d190632aed9819fd4e12fef5d1215b5;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index ebb71f3d6..355d57970 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -4,6 +4,9 @@
  * Copyright (C) 1998-2003 Hewlett-Packard Co
  *	David Mosberger-Tang <davidm@hpl.hp.com>
  * 04/11/17 Ashok Raj	<ashok.raj@intel.com> Added CPU Hotplug Support
+ *
+ * 2005-10-07 Keith Owens <kaos@sgi.com>
+ *	      Add notify_die() hooks.
  */
 #define __KERNEL_SYSCALLS__	/* see <asm/unistd.h> */
 #include <linux/config.h>
@@ -33,6 +36,7 @@
 #include <asm/elf.h>
 #include <asm/ia32.h>
 #include <asm/irq.h>
+#include <asm/kdebug.h>
 #include <asm/pgalloc.h>
 #include <asm/processor.h>
 #include <asm/sal.h>
@@ -178,7 +182,7 @@ static int can_do_pal_halt = 1;
 
 static int __init nohalt_setup(char * str)
 {
-	pal_halt = 0;
+	pal_halt = can_do_pal_halt = 0;
 	return 1;
 }
 __setup("nohalt", nohalt_setup);
@@ -195,11 +199,13 @@ update_pal_halt_status(int status)
 void
 default_idle (void)
 {
-	while (!need_resched())
+	local_irq_enable();
+	while (!need_resched()) {
 		if (can_do_pal_halt)
 			safe_halt();
 		else
 			cpu_relax();
+	}
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -261,16 +267,20 @@ void __attribute__((noreturn))
 cpu_idle (void)
 {
 	void (*mark_idle)(int) = ia64_mark_idle;
+  	int cpu = smp_processor_id();
 
 	/* endless idle loop with no priority at all */
 	while (1) {
+		if (can_do_pal_halt)
+			clear_thread_flag(TIF_POLLING_NRFLAG);
+		else
+			set_thread_flag(TIF_POLLING_NRFLAG);
+
+		if (!need_resched()) {
+			void (*idle)(void);
 #ifdef CONFIG_SMP
-		if (!need_resched())
 			min_xtp();
 #endif
-		while (!need_resched()) {
-			void (*idle)(void);
-
 			if (__get_cpu_var(cpu_idle_state))
 				__get_cpu_var(cpu_idle_state) = 0;
 
@@ -282,17 +292,17 @@ cpu_idle (void)
 			if (!idle)
 				idle = default_idle;
 			(*idle)();
-		}
-
-		if (mark_idle)
-			(*mark_idle)(0);
-
+			if (mark_idle)
+				(*mark_idle)(0);
 #ifdef CONFIG_SMP
-		normal_xtp();
+			normal_xtp();
 #endif
+		}
+		preempt_enable_no_resched();
 		schedule();
+		preempt_disable();
 		check_pgt_cache();
-		if (cpu_is_offline(smp_processor_id()))
+		if (cpu_is_offline(cpu))
 			play_dead();
 	}
 }
@@ -317,7 +327,7 @@ ia64_save_extra (struct task_struct *task)
 #endif
 
 #ifdef CONFIG_IA32_SUPPORT
-	if (IS_IA32_PROCESS(ia64_task_regs(task)))
+	if (IS_IA32_PROCESS(task_pt_regs(task)))
 		ia32_save_state(task);
 #endif
 }
@@ -342,7 +352,7 @@ ia64_load_extra (struct task_struct *task)
 #endif
 
 #ifdef CONFIG_IA32_SUPPORT
-	if (IS_IA32_PROCESS(ia64_task_regs(task)))
+	if (IS_IA32_PROCESS(task_pt_regs(task)))
 		ia32_load_state(task);
 #endif
 }
@@ -477,7 +487,7 @@ copy_thread (int nr, unsigned long clone_flags,
 	 * If we're cloning an IA32 task then save the IA32 extra
 	 * state from the current task to the new task
 	 */
-	if (IS_IA32_PROCESS(ia64_task_regs(current))) {
+	if (IS_IA32_PROCESS(task_pt_regs(current))) {
 		ia32_save_state(p);
 		if (clone_flags & CLONE_SETTLS)
 			retval = ia32_clone_tls(p, child_ptregs);
@@ -690,7 +700,7 @@ int
 kernel_thread_helper (int (*fn)(void *), void *arg)
 {
 #ifdef CONFIG_IA32_SUPPORT
-	if (IS_IA32_PROCESS(ia64_task_regs(current))) {
+	if (IS_IA32_PROCESS(task_pt_regs(current))) {
 		/* A kernel thread is always a 64-bit process. */
 		current->thread.map_base  = DEFAULT_MAP_BASE;
 		current->thread.task_size = DEFAULT_TASK_SIZE;
@@ -710,8 +720,13 @@ flush_thread (void)
 	/* drop floating-point and debug-register state if it exists: */
 	current->thread.flags &= ~(IA64_THREAD_FPH_VALID | IA64_THREAD_DBG_VALID);
 	ia64_drop_fpu(current);
-	if (IS_IA32_PROCESS(ia64_task_regs(current)))
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(task_pt_regs(current))) {
 		ia32_drop_partial_page_list(current);
+		current->thread.task_size = IA32_PAGE_OFFSET;
+		set_fs(USER_DS);
+	}
+#endif
 }
 
 /*
@@ -721,6 +736,7 @@ flush_thread (void)
 void
 exit_thread (void)
 {
+
 	ia64_drop_fpu(current);
 #ifdef CONFIG_PERFMON
        /* if needed, stop monitoring and flush state to perfmon context */
@@ -731,7 +747,7 @@ exit_thread (void)
 	if (current->thread.flags & IA64_THREAD_DBG_VALID)
 		pfm_release_debug_registers(current);
 #endif
-	if (IS_IA32_PROCESS(ia64_task_regs(current)))
+	if (IS_IA32_PROCESS(task_pt_regs(current)))
 		ia32_drop_partial_page_list(current);
 }
 
@@ -787,19 +803,17 @@ cpu_halt (void)
 void
 machine_restart (char *restart_cmd)
 {
+	(void) notify_die(DIE_MACHINE_RESTART, restart_cmd, NULL, 0, 0, 0);
 	(*efi.reset_system)(EFI_RESET_WARM, 0, 0, NULL);
 }
 
-EXPORT_SYMBOL(machine_restart);
-
 void
 machine_halt (void)
 {
+	(void) notify_die(DIE_MACHINE_HALT, "", NULL, 0, 0, 0);
 	cpu_halt();
 }
 
-EXPORT_SYMBOL(machine_halt);
-
 void
 machine_power_off (void)
 {
@@ -808,4 +822,3 @@ machine_power_off (void)
 	machine_halt();
 }
 
-EXPORT_SYMBOL(machine_power_off);