diff options
Diffstat (limited to 'extras/mini-os/include/x86/arch_sched.h')
| -rw-r--r-- | extras/mini-os/include/x86/arch_sched.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/extras/mini-os/include/x86/arch_sched.h b/extras/mini-os/include/x86/arch_sched.h new file mode 100644 index 0000000000..e02dbd05a5 --- /dev/null +++ b/extras/mini-os/include/x86/arch_sched.h @@ -0,0 +1,58 @@ + +#ifndef __ARCH_SCHED_H__ +#define __ARCH_SCHED_H__ + + +static inline struct thread* get_current(void) +{ + struct thread **current; +#ifdef __i386__ + __asm__("andl %%esp,%0; ":"=r" (current) : "r" (~8191UL)); +#else + __asm__("andq %%rsp,%0; ":"=r" (current) : "r" (~8191UL)); +#endif + return *current; +} + +#ifdef __i386__ +#define arch_switch_threads(prev, next) do { \ + unsigned long esi,edi; \ + __asm__ __volatile__("pushfl\n\t" \ + "pushl %%ebp\n\t" \ + "movl %%esp,%0\n\t" /* save ESP */ \ + "movl %4,%%esp\n\t" /* restore ESP */ \ + "movl $1f,%1\n\t" /* save EIP */ \ + "pushl %5\n\t" /* restore EIP */ \ + "ret\n\t" \ + "1:\t" \ + "popl %%ebp\n\t" \ + "popfl" \ + :"=m" (prev->sp),"=m" (prev->ip), \ + "=S" (esi),"=D" (edi) \ + :"m" (next->sp),"m" (next->ip), \ + "2" (prev), "d" (next)); \ +} while (0) +#elif __x86_64__ +#define arch_switch_threads(prev, next) do { \ + unsigned long rsi,rdi; \ + __asm__ __volatile__("pushfq\n\t" \ + "pushq %%rbp\n\t" \ + "movq %%rsp,%0\n\t" /* save RSP */ \ + "movq %4,%%rsp\n\t" /* restore RSP */ \ + "movq $1f,%1\n\t" /* save RIP */ \ + "pushq %5\n\t" /* restore RIP */ \ + "ret\n\t" \ + "1:\t" \ + "popq %%rbp\n\t" \ + "popfq" \ + :"=m" (prev->sp),"=m" (prev->ip), \ + "=S" (rsi),"=D" (rdi) \ + :"m" (next->sp),"m" (next->ip), \ + "2" (prev), "d" (next)); \ +} while (0) +#endif + + + + +#endif /* __ARCH_SCHED_H__ */ |