projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a0616cde DH |
1 | /* |
| 2 | * Copyright IBM Corp. 1999, 2009 | |
| 3 | * | |
| 4 | * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef __ASM_SWITCH_TO_H | |
| 8 | #define __ASM_SWITCH_TO_H | |
| 9 | ||
| 10 | #include <linux/thread_info.h> | |
| 904818e2 | 11 | #include <asm/fpu-internal.h> |
| bee5c286 | 12 | #include <asm/ptrace.h> |
| a0616cde DH |
13 | |
| 14 | extern struct task_struct *__switch_to(void *, void *); | |
| 64597f9d | 15 | extern void update_cr_regs(struct task_struct *task); |
| a0616cde | 16 | |
| a0616cde DH |
17 | static inline void save_access_regs(unsigned int *acrs) |
| 18 | { | |
| bee5c286 HC |
19 | typedef struct { int _[NUM_ACRS]; } acrstype; |
| 20 | ||
| 21 | asm volatile("stam 0,15,%0" : "=Q" (*(acrstype *)acrs)); | |
| a0616cde DH |
22 | } |
| 23 | ||
| 24 | static inline void restore_access_regs(unsigned int *acrs) | |
| 25 | { | |
| bee5c286 HC |
26 | typedef struct { int _[NUM_ACRS]; } acrstype; |
| 27 | ||
| 28 | asm volatile("lam 0,15,%0" : : "Q" (*(acrstype *)acrs)); | |
| a0616cde DH |
29 | } |
| 30 | ||
| 31 | #define switch_to(prev,next,last) do { \ | |
| 32 | if (prev->mm) { \ | |
| d0164ee2 | 33 | save_fpu_regs(); \ |
| a0616cde | 34 | save_access_regs(&prev->thread.acrs[0]); \ |
| e4b8b3f3 | 35 | save_ri_cb(prev->thread.ri_cb); \ |
| a0616cde DH |
36 | } \ |
| 37 | if (next->mm) { \ | |
| 80703617 | 38 | update_cr_regs(next); \ |
| 9977e886 | 39 | set_cpu_flag(CIF_FPU); \ |
| a0616cde | 40 | restore_access_regs(&next->thread.acrs[0]); \ |
| e4b8b3f3 | 41 | restore_ri_cb(next->thread.ri_cb, prev->thread.ri_cb); \ |
| a0616cde DH |
42 | } \ |
| 43 | prev = __switch_to(prev,next); \ | |
| 44 | } while (0) | |
| 45 | ||
| a0616cde | 46 | #endif /* __ASM_SWITCH_TO_H */ |