| /SPARTAN/trunk/arch/amd64/include/cpu.h |
|---|
| 51,8 → 51,6 |
| }; |
| extern void set_TS_flag(void); |
| extern void reset_TS_flag(void); |
| extern void set_efer_flag(int flag); |
| extern __u64 read_efer_flag(void); |
| void cpu_setup_fpu(void); |
| /SPARTAN/trunk/arch/amd64/Makefile.inc |
|---|
| 10,7 → 10,7 |
| BFD_NAME=elf64-x86-64 |
| BFD_ARCH=i386:x86-64 |
| DEFS=-DARCH=$(ARCH) |
| DEFS=-DARCH=$(ARCH) -DFPU_LAZY |
| ifdef SMP |
| DEFS+=-D$(SMP) |
| /SPARTAN/trunk/arch/amd64/src/fpu_context.c |
|---|
| 33,20 → 33,7 |
| void fpu_context_save(fpu_context_t *fctx) |
| { |
| } |
| void fpu_context_restore(fpu_context_t *fctx) |
| { |
| if(THREAD==CPU->fpu_owner) |
| reset_TS_flag(); |
| else |
| set_TS_flag(); |
| } |
| void fpu_lazy_context_save(fpu_context_t *fctx) |
| { |
| /* TODO: We need malloc that allocates on 16-byte boundary !! */ |
| /* Align on 16-byte boundary */ |
| if (((__u64)fctx) & 0xf) |
| fctx = (fpu_context_t *)((((__u64)fctx) | 0xf) + 1); |
| 56,7 → 43,7 |
| ); |
| } |
| void fpu_lazy_context_restore(fpu_context_t *fctx) |
| void fpu_context_restore(fpu_context_t *fctx) |
| { |
| /* TODO: We need malloc that allocates on 16-byte boundary !! */ |
| if (((__u64)fctx) & 0xf) |
| /SPARTAN/trunk/arch/amd64/src/cpu/cpu.c |
|---|
| 90,7 → 90,7 |
| * does a lazy fpu context switch. |
| * |
| */ |
| void set_TS_flag(void) |
| void fpu_disable(void) |
| { |
| __asm__ volatile ( |
| "mov %%cr0,%%rax;" |
| 102,7 → 102,7 |
| ); |
| } |
| void reset_TS_flag(void) |
| void fpu_enable(void) |
| { |
| __asm__ volatile ( |
| "mov %%cr0,%%rax;" |
| /SPARTAN/trunk/arch/amd64/src/interrupt.c |
|---|
| 38,9 → 38,9 |
| #include <arch.h> |
| #include <symtab.h> |
| #include <arch/asm.h> |
| #include <proc/scheduler.h> |
| static void messy_stack_trace(__native *stack) |
| { |
| __native *upper_limit = (__native *)(((__native)get_stack_base()) + STACK_SIZE); |
| 138,20 → 138,11 |
| void nm_fault(__u8 n, __native stack[]) |
| { |
| reset_TS_flag(); |
| if (CPU->fpu_owner != NULL) { |
| fpu_lazy_context_save(&CPU->fpu_owner->saved_fpu_context); |
| /* don't prevent migration */ |
| CPU->fpu_owner->fpu_context_engaged=0; |
| } |
| if (THREAD->fpu_context_exists) |
| fpu_lazy_context_restore(&THREAD->saved_fpu_context); |
| else { |
| fpu_init(); |
| THREAD->fpu_context_exists=1; |
| } |
| CPU->fpu_owner=THREAD; |
| THREAD->fpu_context_engaged = 1; |
| #ifdef FPU_LAZY |
| scheduler_fpu_lazy_request(); |
| #else |
| panic("fpu fault"); |
| #endif |
| } |