| 1,4 → 1,3 |
|---|
| |
| /* Project: OSLib |
| * Description: The OS Construction Kit |
| * Date: 1.6.2000 |
| 27,6 → 26,7 |
|---|
| |
| #include <ll/i386/hw-data.h> |
| #include <ll/i386/hw-instr.h> |
| #include <ll/i386/hw-func.h> |
| #include <ll/i386/mem.h> |
| |
| #include <ll/i386/tss-ctx.h> |
| 33,15 → 33,15 |
|---|
| |
| FILE(FPU); |
| |
| extern TSS TSS_table[]; |
| extern TSS main_tss; |
| |
| BYTE LL_FPU_savearea[FPU_CONTEXT_SIZE]; /* Global FPU scratch SaveArea */ |
| BYTE LL_FPU_savearea[FPU_CONTEXT_SIZE]; /* Global FPU scratch SaveArea */ |
| #ifdef __FPU_DEBUG__ |
| long int ndp_called = 0, ndp_switched = 0; |
| long int ndp_called = 0,ndp_switched = 0; |
| #endif |
| |
| /* FPU context management */ |
| static CONTEXT LL_has_FPU = TSSMain; |
| static TSS *LL_has_FPU = &main_tss; |
| |
| /* As the 8086 does not have an hardware mechanism to support task */ |
| /* switch, also the FPU context switch is implemented via software. */ |
| 51,37 → 51,40 |
|---|
| |
| void ll_FPU_hook(void) |
| { |
| CONTEXT current; |
| TSS *base; |
| |
| current = get_TR(); |
| base = (TSS *)GDT_read(current, NULL, NULL, NULL); |
| |
| clts(); |
| #ifdef __FPU_DEBUG__ |
| ndp_called++; |
| #endif |
| if (LL_has_FPU == TSSsel2index(get_TR())) |
| return; |
| #ifdef __FPU_DEBUG__ |
| ndp_switched++; |
| #endif |
| #ifdef __FPU_DEBUG__ |
| ndp_called++; |
| #endif |
| if (LL_has_FPU == base) return; |
| #ifdef __FPU_DEBUG__ |
| ndp_switched++; |
| #endif |
| |
| #if 0 |
| LL_FPU_save(); |
| memcpy(TSS_table[LL_has_FPU].ctx_FPU, LL_FPU_savearea, |
| FPU_CONTEXT_SIZE); |
| #else |
| save_fpu(&(TSS_table[LL_has_FPU])); |
| memcpy(TSS_table[LL_has_FPU].ctx_FPU,LL_FPU_savearea,FPU_CONTEXT_SIZE); |
| #else |
| save_fpu(LL_has_FPU); |
| #endif |
| |
| LL_has_FPU = TSSsel2index(get_TR()); |
| LL_has_FPU = base; |
| |
| #if 1 |
| memcpy(LL_FPU_savearea, TSS_table[LL_has_FPU].ctx_FPU, |
| FPU_CONTEXT_SIZE); |
| memcpy(LL_FPU_savearea, base->ctx_FPU, FPU_CONTEXT_SIZE); |
| LL_FPU_restore(); |
| #else |
| #else |
| restore_fpu(&(TSS_table[LL_has_FPU])); |
| #endif |
| return; |
| } |
| |
| CONTEXT LL_FPU_get_task(void) |
| TSS *LL_FPU_get_task(void) |
| { |
| return (LL_has_FPU); |
| return(LL_has_FPU); |
| } |