| /SPARTAN/trunk/arch/ia32/include/cpu.h |
|---|
| 30,6 → 30,7 |
| #define __ia32_CPU_H__ |
| #include <config.h> |
| #include <proc/thread.h> |
| #include <typedefs.h> |
| #include <arch/pm.h> |
| #include <arch/asm.h> |
| 46,7 → 47,11 |
| int model; |
| int stepping; |
| struct tss *tss; |
| thread_t *fpu_owner; |
| }; |
| void set_TS_flag(void); |
| void reset_TS_flag(void); |
| #endif |
| /SPARTAN/trunk/arch/ia32/src/fpu_context.c |
|---|
| 29,7 → 29,10 |
| */ |
| #include <fpu_context.h> |
| #include <arch.h> |
| #include <cpu.h> |
| void fpu_context_save(fpu_context_t *fctx) |
| { |
| } |
| 37,6 → 40,8 |
| void fpu_context_restore(fpu_context_t *fctx) |
| { |
| if(THREAD==CPU->arch.fpu_owner) reset_TS_flag(); |
| else set_TS_flag(); |
| } |
| /SPARTAN/trunk/arch/ia32/src/cpu/cpu.c |
|---|
| 61,9 → 61,38 |
| "GenuineIntel" |
| }; |
| void set_TS_flag(void) |
| { |
| asm |
| ( |
| "mov %%cr0,%%eax;" |
| "or $8,%%eax;" |
| "mov %%eax,%%cr0;" |
| : |
| : |
| :"%eax" |
| ); |
| } |
| void reset_TS_flag(void) |
| { |
| asm |
| ( |
| "mov %%cr0,%%eax;" |
| "and $0xffFFffF7,%%eax;" |
| "mov %%eax,%%cr0;" |
| : |
| : |
| :"%eax" |
| ); |
| } |
| void cpu_arch_init(void) |
| { |
| CPU->arch.tss = tss_p; |
| CPU->arch.fpu_owner=NULL; |
| } |