97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
#ifndef __ASM_SH_SYSTEM_32_H
|
|
#define __ASM_SH_SYSTEM_32_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct task_struct *__switch_to(struct task_struct *prev,
|
|
struct task_struct *next);
|
|
|
|
/*
|
|
* switch_to() should switch tasks to task nr n, first
|
|
*/
|
|
#define switch_to(prev, next, last) \
|
|
do { \
|
|
register u32 *__ts1 __asm__ ("r1") = &prev->thread.sp; \
|
|
register u32 *__ts2 __asm__ ("r2") = &prev->thread.pc; \
|
|
register u32 *__ts4 __asm__ ("r4") = (u32 *)prev; \
|
|
register u32 *__ts5 __asm__ ("r5") = (u32 *)next; \
|
|
register u32 *__ts6 __asm__ ("r6") = &next->thread.sp; \
|
|
register u32 __ts7 __asm__ ("r7") = next->thread.pc; \
|
|
struct task_struct *__last; \
|
|
\
|
|
__asm__ __volatile__ ( \
|
|
".balign 4\n\t" \
|
|
"stc.l gbr, @-r15\n\t" \
|
|
"sts.l pr, @-r15\n\t" \
|
|
"mov.l r8, @-r15\n\t" \
|
|
"mov.l r9, @-r15\n\t" \
|
|
"mov.l r10, @-r15\n\t" \
|
|
"mov.l r11, @-r15\n\t" \
|
|
"mov.l r12, @-r15\n\t" \
|
|
"mov.l r13, @-r15\n\t" \
|
|
"mov.l r14, @-r15\n\t" \
|
|
"mov.l r15, @r1\t! save SP\n\t" \
|
|
"mov.l @r6, r15\t! change to new stack\n\t" \
|
|
"mova 1f, %0\n\t" \
|
|
"mov.l %0, @r2\t! save PC\n\t" \
|
|
"mov.l 2f, %0\n\t" \
|
|
"jmp @%0\t! call __switch_to\n\t" \
|
|
" lds r7, pr\t! with return to new PC\n\t" \
|
|
".balign 4\n" \
|
|
"2:\n\t" \
|
|
".long __switch_to\n" \
|
|
"1:\n\t" \
|
|
"mov.l @r15+, r14\n\t" \
|
|
"mov.l @r15+, r13\n\t" \
|
|
"mov.l @r15+, r12\n\t" \
|
|
"mov.l @r15+, r11\n\t" \
|
|
"mov.l @r15+, r10\n\t" \
|
|
"mov.l @r15+, r9\n\t" \
|
|
"mov.l @r15+, r8\n\t" \
|
|
"lds.l @r15+, pr\n\t" \
|
|
"ldc.l @r15+, gbr\n\t" \
|
|
: "=z" (__last) \
|
|
: "r" (__ts1), "r" (__ts2), "r" (__ts4), \
|
|
"r" (__ts5), "r" (__ts6), "r" (__ts7) \
|
|
: "r3", "t"); \
|
|
\
|
|
last = __last; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Jump to P2 area.
|
|
* When handling TLB or caches, we need to do it from P2 area.
|
|
*/
|
|
#define jump_to_P2() \
|
|
do { \
|
|
unsigned long __dummy; \
|
|
__asm__ __volatile__( \
|
|
"mov.l 1f, %0\n\t" \
|
|
"or %1, %0\n\t" \
|
|
"jmp @%0\n\t" \
|
|
" nop\n\t" \
|
|
".balign 4\n" \
|
|
"1: .long 2f\n" \
|
|
"2:" \
|
|
: "=&r" (__dummy) \
|
|
: "r" (0x20000000)); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Back to P1 area.
|
|
*/
|
|
#define back_to_P1() \
|
|
do { \
|
|
unsigned long __dummy; \
|
|
ctrl_barrier(); \
|
|
__asm__ __volatile__( \
|
|
"mov.l 1f, %0\n\t" \
|
|
"jmp @%0\n\t" \
|
|
" nop\n\t" \
|
|
".balign 4\n" \
|
|
"1: .long 2f\n" \
|
|
"2:" \
|
|
: "=&r" (__dummy)); \
|
|
} while (0)
|
|
|
|
#endif /* __ASM_SH_SYSTEM_32_H */
|