| /SPARTAN/trunk/arch/ia32/include/fpu_context.h |
|---|
| 37,5 → 37,4 |
| }; |
| #endif |
| /SPARTAN/trunk/arch/ia32/include/cpu.h |
|---|
| 41,8 → 41,4 |
| struct tss *tss; |
| }; |
| void set_TS_flag(void); |
| void reset_TS_flag(void); |
| #endif |
| /SPARTAN/trunk/arch/ia32/Makefile.inc |
|---|
| 7,7 → 7,7 |
| BFD_ARCH=i386 |
| DEFS:=-DARCH=$(ARCH) |
| DEFS:=-DARCH=$(ARCH) -DFPU_LAZY |
| ifdef SMP |
| DEFS+=-D$(SMP) |
| /SPARTAN/trunk/arch/ia32/src/fpu_context.c |
|---|
| 33,23 → 33,6 |
| 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(); |
| if (CPU->fpu_owner != NULL) |
| (CPU->fpu_owner)->fpu_context_engaged=1; |
| } |
| } |
| void fpu_lazy_context_save(fpu_context_t *fctx) |
| { |
| __asm__ volatile ( |
| "fnsave %0" |
| : "=m"(*fctx) |
| 56,7 → 39,8 |
| ); |
| } |
| void fpu_lazy_context_restore(fpu_context_t *fctx) |
| void fpu_context_restore(fpu_context_t *fctx) |
| { |
| __asm__ volatile ( |
| "frstor %0" |
| /SPARTAN/trunk/arch/ia32/src/cpu/cpu.c |
|---|
| 62,10 → 62,9 |
| "GenuineIntel" |
| }; |
| void set_TS_flag(void) |
| void fpu_disable(void) |
| { |
| asm |
| ( |
| __asm__ volatile ( |
| "mov %%cr0,%%eax;" |
| "or $8,%%eax;" |
| "mov %%eax,%%cr0;" |
| 75,10 → 74,9 |
| ); |
| } |
| void reset_TS_flag(void) |
| void fpu_enable(void) |
| { |
| asm |
| ( |
| __asm__ volatile ( |
| "mov %%cr0,%%eax;" |
| "and $0xffFFffF7,%%eax;" |
| "mov %%eax,%%cr0;" |
| /SPARTAN/trunk/arch/ia32/src/interrupt.c |
|---|
| 109,18 → 109,11 |
| void nm_fault(__u8 n, __native stack[]) |
| { |
| reset_TS_flag(); |
| if (CPU->fpu_owner != NULL) { |
| fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context)); |
| CPU->fpu_owner->fpu_context_engaged=0; /* don't prevent migration */ |
| } |
| if (THREAD->fpu_context_exists) |
| fpu_lazy_context_restore(&(THREAD->saved_fpu_context)); |
| else { |
| fpu_init(); |
| THREAD->fpu_context_exists=1; |
| } |
| CPU->fpu_owner=THREAD; |
| #ifdef FPU_LAZY |
| scheduler_fpu_lazy_request(); |
| #else |
| panic("fpu fault"); |
| #endif |
| } |
| /SPARTAN/trunk/arch/ia32/Makefile.inc.cross |
|---|
| 7,11 → 7,12 |
| AS=$(IA-32_BINUTILS_DIR)/$(IA-32_TARGET)-as |
| LD=$(IA-32_BINUTILS_DIR)/$(IA-32_TARGET)-ld |
| OBJCOPY=$(IA-32_BINUTILS_DIR)/$(IA-32_TARGET)-objcopy |
| OBJDUMP=$(IA-32_BINUTILS_DIR)/$(IA-32_TARGET)-objdump |
| BFD_NAME=elf32-i386 |
| BFD_ARCH=i386 |
| DEFS:=-DARCH=$(ARCH) |
| DEFS:=-DARCH=$(ARCH) -DFPU_LAZY |
| ifdef SMP |
| DEFS+=-D$(SMP) |
| 25,6 → 26,9 |
| CFLAGS=$(CPPFLAGS) -nostdlib -fno-builtin -fomit-frame-pointer -Werror-implicit-function-declaration -Wmissing-prototypes -Werror -O3 |
| LFLAGS=-M -no-check-sections |
| ../arch/$(ARCH)/_link.ld: ../arch/$(ARCH)/_link.ld.in |
| $(CC) $(CFLAGS) -E -x c $< | grep -v "^\#" > $@ |
| arch_sources= \ |
| arch/context.s \ |
| arch/debug/panic.s \ |