forked from Minki/linux
a0616cdebc
Disintegrate asm/system.h for S390. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-s390@vger.kernel.org
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
|
|
* Copyright IBM Corp. 1999, 2009
|
|
*
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef __ASM_SWITCH_TO_H
|
|
#define __ASM_SWITCH_TO_H
|
|
|
|
#include <linux/thread_info.h>
|
|
|
|
extern struct task_struct *__switch_to(void *, void *);
|
|
extern void update_per_regs(struct task_struct *task);
|
|
|
|
static inline void save_fp_regs(s390_fp_regs *fpregs)
|
|
{
|
|
asm volatile(
|
|
" std 0,%O0+8(%R0)\n"
|
|
" std 2,%O0+24(%R0)\n"
|
|
" std 4,%O0+40(%R0)\n"
|
|
" std 6,%O0+56(%R0)"
|
|
: "=Q" (*fpregs) : "Q" (*fpregs));
|
|
if (!MACHINE_HAS_IEEE)
|
|
return;
|
|
asm volatile(
|
|
" stfpc %0\n"
|
|
" std 1,%O0+16(%R0)\n"
|
|
" std 3,%O0+32(%R0)\n"
|
|
" std 5,%O0+48(%R0)\n"
|
|
" std 7,%O0+64(%R0)\n"
|
|
" std 8,%O0+72(%R0)\n"
|
|
" std 9,%O0+80(%R0)\n"
|
|
" std 10,%O0+88(%R0)\n"
|
|
" std 11,%O0+96(%R0)\n"
|
|
" std 12,%O0+104(%R0)\n"
|
|
" std 13,%O0+112(%R0)\n"
|
|
" std 14,%O0+120(%R0)\n"
|
|
" std 15,%O0+128(%R0)\n"
|
|
: "=Q" (*fpregs) : "Q" (*fpregs));
|
|
}
|
|
|
|
static inline void restore_fp_regs(s390_fp_regs *fpregs)
|
|
{
|
|
asm volatile(
|
|
" ld 0,%O0+8(%R0)\n"
|
|
" ld 2,%O0+24(%R0)\n"
|
|
" ld 4,%O0+40(%R0)\n"
|
|
" ld 6,%O0+56(%R0)"
|
|
: : "Q" (*fpregs));
|
|
if (!MACHINE_HAS_IEEE)
|
|
return;
|
|
asm volatile(
|
|
" lfpc %0\n"
|
|
" ld 1,%O0+16(%R0)\n"
|
|
" ld 3,%O0+32(%R0)\n"
|
|
" ld 5,%O0+48(%R0)\n"
|
|
" ld 7,%O0+64(%R0)\n"
|
|
" ld 8,%O0+72(%R0)\n"
|
|
" ld 9,%O0+80(%R0)\n"
|
|
" ld 10,%O0+88(%R0)\n"
|
|
" ld 11,%O0+96(%R0)\n"
|
|
" ld 12,%O0+104(%R0)\n"
|
|
" ld 13,%O0+112(%R0)\n"
|
|
" ld 14,%O0+120(%R0)\n"
|
|
" ld 15,%O0+128(%R0)\n"
|
|
: : "Q" (*fpregs));
|
|
}
|
|
|
|
static inline void save_access_regs(unsigned int *acrs)
|
|
{
|
|
asm volatile("stam 0,15,%0" : "=Q" (*acrs));
|
|
}
|
|
|
|
static inline void restore_access_regs(unsigned int *acrs)
|
|
{
|
|
asm volatile("lam 0,15,%0" : : "Q" (*acrs));
|
|
}
|
|
|
|
#define switch_to(prev,next,last) do { \
|
|
if (prev->mm) { \
|
|
save_fp_regs(&prev->thread.fp_regs); \
|
|
save_access_regs(&prev->thread.acrs[0]); \
|
|
} \
|
|
if (next->mm) { \
|
|
restore_fp_regs(&next->thread.fp_regs); \
|
|
restore_access_regs(&next->thread.acrs[0]); \
|
|
update_per_regs(next); \
|
|
} \
|
|
prev = __switch_to(prev,next); \
|
|
} while (0)
|
|
|
|
extern void account_vtime(struct task_struct *, struct task_struct *);
|
|
extern void account_tick_vtime(struct task_struct *);
|
|
|
|
#define finish_arch_switch(prev) do { \
|
|
set_fs(current->thread.mm_segment); \
|
|
account_vtime(prev, current); \
|
|
} while (0)
|
|
|
|
#endif /* __ASM_SWITCH_TO_H */
|