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Diffstat (limited to 'arch/mips/kernel/process.c')
-rw-r--r--arch/mips/kernel/process.c53
1 files changed, 36 insertions, 17 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index eb902c1f0cad..c6a041d9d05d 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -51,19 +51,6 @@ void arch_cpu_idle_dead(void)
}
#endif
-void arch_cpu_idle(void)
-{
-#ifdef CONFIG_MIPS_MT_SMTC
- extern void smtc_idle_loop_hook(void);
-
- smtc_idle_loop_hook();
-#endif
- if (cpu_wait)
- (*cpu_wait)();
- else
- local_irq_enable();
-}
-
asmlinkage void ret_from_fork(void);
asmlinkage void ret_from_kernel_thread(void);
@@ -224,6 +211,9 @@ struct mips_frame_info {
int pc_offset;
};
+#define J_TARGET(pc,target) \
+ (((unsigned long)(pc) & 0xf0000000) | ((target) << 2))
+
static inline int is_ra_save_ins(union mips_instruction *ip)
{
#ifdef CONFIG_CPU_MICROMIPS
@@ -264,7 +254,7 @@ static inline int is_ra_save_ins(union mips_instruction *ip)
#endif
}
-static inline int is_jal_jalr_jr_ins(union mips_instruction *ip)
+static inline int is_jump_ins(union mips_instruction *ip)
{
#ifdef CONFIG_CPU_MICROMIPS
/*
@@ -288,6 +278,8 @@ static inline int is_jal_jalr_jr_ins(union mips_instruction *ip)
return 0;
return (((ip->u_format.uimmediate >> 6) & mm_jalr_op) == mm_jalr_op);
#else
+ if (ip->j_format.opcode == j_op)
+ return 1;
if (ip->j_format.opcode == jal_op)
return 1;
if (ip->r_format.opcode != spec_op)
@@ -350,7 +342,7 @@ static int get_frame_info(struct mips_frame_info *info)
for (i = 0; i < max_insns; i++, ip++) {
- if (is_jal_jalr_jr_ins(ip))
+ if (is_jump_ins(ip))
break;
if (!info->frame_size) {
if (is_sp_move_ins(ip))
@@ -393,15 +385,42 @@ err:
static struct mips_frame_info schedule_mfi __read_mostly;
+#ifdef CONFIG_KALLSYMS
+static unsigned long get___schedule_addr(void)
+{
+ return kallsyms_lookup_name("__schedule");
+}
+#else
+static unsigned long get___schedule_addr(void)
+{
+ union mips_instruction *ip = (void *)schedule;
+ int max_insns = 8;
+ int i;
+
+ for (i = 0; i < max_insns; i++, ip++) {
+ if (ip->j_format.opcode == j_op)
+ return J_TARGET(ip, ip->j_format.target);
+ }
+ return 0;
+}
+#endif
+
static int __init frame_info_init(void)
{
unsigned long size = 0;
#ifdef CONFIG_KALLSYMS
unsigned long ofs;
+#endif
+ unsigned long addr;
+
+ addr = get___schedule_addr();
+ if (!addr)
+ addr = (unsigned long)schedule;
- kallsyms_lookup_size_offset((unsigned long)schedule, &size, &ofs);
+#ifdef CONFIG_KALLSYMS
+ kallsyms_lookup_size_offset(addr, &size, &ofs);
#endif
- schedule_mfi.func = schedule;
+ schedule_mfi.func = (void *)addr;
schedule_mfi.func_size = size;
get_frame_info(&schedule_mfi);