?? rtl_switch.h
字號:
#include <linux/version.h>#define __STR(x) #x#define STR(x) __STR(x)extern void rtl_fpu_save (schedule_t *s, RTL_THREAD_STRUCT *task);extern void rtl_fpu_restore (schedule_t *s,RTL_THREAD_STRUCT *task);extern void rtl_task_init_fpu (RTL_THREAD_STRUCT *t, RTL_THREAD_STRUCT *fpu_owner);#define rtl_switch_to(current_task_ptr, new_task) \ __asm__ __volatile__( \ "pushl %%eax\n\t" \ "pushl %%ebp\n\t" \ "pushl %%edi\n\t" \ "pushl %%esi\n\t" \ "pushl %%edx\n\t" \ "pushl %%ecx\n\t" \ "pushl %%ebx\n\t" \ "movl (%%ebx), %%edx\n\t" /* get current */ \ "pushl $1f\n\t" \ "movl %%esp, (%%edx)\n\t" \ "movl (%%ecx), %%esp\n\t" \ "movl %%ecx, (%%ebx)\n\t" /* store current */\ "ret\n\t" \"1: popl %%ebx\n\t" \ "popl %%ecx\n\t" \ "popl %%edx\n\t" \ "popl %%esi\n\t" \ "popl %%edi\n\t" \ "popl %%ebp\n\t" \ "popl %%eax\n\t" \ : /* no output */ \ : "c" (new_task), "b" (current_task_ptr) \ );#define rtl_init_stack(task,fn,data,rt_startup)\ {\ *--(task->stack) = (int) data;\ *--(task->stack) = (int) fn;\ *--(task->stack) = 0; /* dummy return addr*/\ *--(task->stack) = (int) rt_startup;\ }typedef struct { unsigned long cr3;} rtl_mmu_state_t;#define rtl_mmu_save(mmu_state) __asm__ __volatile__("movl %%cr3,%0":"=r" (*(mmu_state)) :)#if LINUX_VERSION_CODE >= 0x020300#define rtl_mmu_switch_to(tsk) do { __asm__ __volatile__("movl %0,%%cr3\n\tmovl %0,%%cr3": :"r" (__pa(((tsk)->mm)->pgd))); } while (0)#else#define rtl_mmu_switch_to(tsk) do { __asm__ __volatile__("movl %0,%%cr3\n\tmovl %0,%%cr3": :"r" ((tsk)->tss.cr3)); } while (0)#endif#define rtl_mmu_restore(mmu_state) __asm__ __volatile__("movl %0,%%cr3": :"r" (*(mmu_state)))#define RTL_PSC_NEW 1?? 快捷鍵說明
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