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OpenCloudOS-Kernel
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xtensa: move spill_registers to traps.h 

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov 2013-02-03 05:39:22 +04:00 committed by Chris Zankel
parent b6c7e873da
commit 2d6f82fee4
2 changed files with 25 additions and 20 deletions
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24
arch/xtensa/include/asm/traps.h
View File

@ -20,4 +20,28 @@
extern void * __init trap_set_handler(int cause, void *handler);
extern void do_unhandled(struct pt_regs *regs, unsigned long exccause);
static inline void spill_registers(void)
{
unsigned int a0, ps;
__asm__ __volatile__ (
"movi a14, " __stringify(PS_EXCM_BIT | LOCKLEVEL) "\n\t"
"mov a12, a0\n\t"
"rsr a13, sar\n\t"
"xsr a14, ps\n\t"
"movi a0, _spill_registers\n\t"
"rsync\n\t"
"callx0 a0\n\t"
"mov a0, a12\n\t"
"wsr a13, sar\n\t"
"wsr a14, ps\n\t"
: : "a" (&a0), "a" (&ps)
#if defined(CONFIG_FRAME_POINTER)
: "a2", "a3", "a4", "a11", "a12", "a13", "a14", "a15",
#else
: "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
#endif
"memory");
}
#endif /* _XTENSA_TRAPS_H */

21
arch/xtensa/kernel/traps.c
View File

@ -37,6 +37,7 @@
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/traps.h>
#ifdef CONFIG_KGDB
extern int gdb_enter;
@ -413,26 +414,6 @@ static __always_inline unsigned long *stack_pointer(struct task_struct *task)
return sp;
}
static inline void spill_registers(void)
{
unsigned int a0, ps;
__asm__ __volatile__ (
"movi a14, " __stringify(PS_EXCM_BIT | LOCKLEVEL) "\n\t"
"mov a12, a0\n\t"
"rsr a13, sar\n\t"
"xsr a14, ps\n\t"
"movi a0, _spill_registers\n\t"
"rsync\n\t"
"callx0 a0\n\t"
"mov a0, a12\n\t"
"wsr a13, sar\n\t"
"wsr a14, ps\n\t"
:: "a" (&a0), "a" (&ps)
: "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
"memory");
}
void show_trace(struct task_struct *task, unsigned long *sp)
{
unsigned long a0, a1, pc;