diff options
Diffstat (limited to 'xen/include/asm-i386/system.h')
| -rw-r--r-- | xen/include/asm-i386/system.h | 30 |
1 files changed, 2 insertions, 28 deletions
diff --git a/xen/include/asm-i386/system.h b/xen/include/asm-i386/system.h index 4200a1051d..a19d629d8c 100644 --- a/xen/include/asm-i386/system.h +++ b/xen/include/asm-i386/system.h @@ -5,34 +5,8 @@ #include <asm/bitops.h> struct task_struct; -extern void FASTCALL(__switch_to(struct task_struct *prev, - struct task_struct *next)); - -#define prepare_to_switch() do { } while(0) -#define switch_to(prev,next) do { \ - asm volatile("pushl %%ebp\n\t" \ - "pushl %%ebx\n\t" \ - "pushl %%esi\n\t" \ - "pushl %%edi\n\t" \ - "movl %%esp,%0\n\t" /* save ESP */ \ - "cli\n\t" \ - "movl %2,%%esp\n\t" /* restore ESP */ \ - "movl %6,%%cr3\n\t" /* restore pagetables */\ - "sti\n\t" \ - "movl $1f,%1\n\t" /* save EIP */ \ - "pushl %3\n\t" /* restore EIP */ \ - "jmp __switch_to\n" \ - "1:\t" \ - "popl %%edi\n\t" \ - "popl %%esi\n\t" \ - "popl %%ebx\n\t" \ - "popl %%ebp\n\t" \ - :"=m" (prev->thread.esp),"=m" (prev->thread.eip) \ - :"m" (next->thread.esp),"m" (next->thread.eip), \ - "a" (prev), "d" (next), \ - "c" (pagetable_val(next->mm.pagetable)) \ - :"memory"); \ -} while (0) +extern void switch_to(struct task_struct *prev, + struct task_struct *next); /* Clear and set 'TS' bit respectively */ #define clts() __asm__ __volatile__ ("clts") |