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sparc64: Implement IRQ stacks.

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-08-12 18:33:56 -07:00
commit 4f70f7a91b
8 changed files with 161 additions and 30 deletions
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27
arch/sparc64/kernel/process.c
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@ -52,6 +52,8 @@
#include <asm/irq_regs.h>
#include <asm/smp.h>
#include "kstack.h"
static void sparc64_yield(int cpu)
{
if (tlb_type != hypervisor)
@ -235,19 +237,6 @@ void show_regs(struct pt_regs *regs)
struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
static DEFINE_SPINLOCK(global_reg_snapshot_lock);
static bool kstack_valid(struct thread_info *tp, struct reg_window *rw)
{
unsigned long thread_base, fp;
thread_base = (unsigned long) tp;
fp = (unsigned long) rw;
if (fp < (thread_base + sizeof(struct thread_info)) ||
fp >= (thread_base + THREAD_SIZE))
return false;
return true;
}
static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
int this_cpu)
{
@ -264,11 +253,11 @@ static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
rw = (struct reg_window *)
(regs->u_regs[UREG_FP] + STACK_BIAS);
if (kstack_valid(tp, rw)) {
if (kstack_valid(tp, (unsigned long) rw)) {
global_reg_snapshot[this_cpu].i7 = rw->ins[7];
rw = (struct reg_window *)
(rw->ins[6] + STACK_BIAS);
if (kstack_valid(tp, rw))
if (kstack_valid(tp, (unsigned long) rw))
global_reg_snapshot[this_cpu].rpc = rw->ins[7];
}
} else {
@ -828,7 +817,7 @@ out:
unsigned long get_wchan(struct task_struct *task)
{
unsigned long pc, fp, bias = 0;
unsigned long thread_info_base;
struct thread_info *tp;
struct reg_window *rw;
unsigned long ret = 0;
int count = 0;
@ -837,14 +826,12 @@ unsigned long get_wchan(struct task_struct *task)
task->state == TASK_RUNNING)
goto out;
thread_info_base = (unsigned long) task_stack_page(task);
tp = task_thread_info(task);
bias = STACK_BIAS;
fp = task_thread_info(task)->ksp + bias;
do {
/* Bogus frame pointer? */
if (fp < (thread_info_base + sizeof(struct thread_info)) ||
fp >= (thread_info_base + THREAD_SIZE))
if (!kstack_valid(tp, fp))
break;
rw = (struct reg_window *) fp;
pc = rw->ins[7];