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Fixed FPU for single cpu

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This commit is contained in:
Tomas Hruby 2010-09-16 09:51:45 +00:00
parent 72cc01ff48
commit 13bda81ee0
2 changed files with 10 additions and 5 deletions
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14
kernel/arch/i386/arch_system.c
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@ -244,7 +244,7 @@ PUBLIC void fpu_init(void)
PUBLIC void save_local_fpu(struct proc *pr) PUBLIC void save_local_fpu(struct proc *pr)
{ {
if(!fpu_presence) if(!is_fpu())
return; return;
/* Save changed FPU context. */ /* Save changed FPU context. */
@ -258,9 +258,12 @@ PUBLIC void save_local_fpu(struct proc *pr)
PUBLIC void save_fpu(struct proc *pr) PUBLIC void save_fpu(struct proc *pr)
{ {
#if CONFIG_SMP #ifdef CONFIG_SMP
if (cpuid == pr->p_cpu) { if (cpuid == pr->p_cpu) {
save_local_fpu(pr); if (get_cpulocal_var(fpu_owner) == pr) {
disable_fpu_exception();
save_local_fpu(pr);
}
} }
else { else {
int stopped; int stopped;
@ -280,7 +283,10 @@ PUBLIC void save_fpu(struct proc *pr)
RTS_UNSET(pr, RTS_PROC_STOP); RTS_UNSET(pr, RTS_PROC_STOP);
} }
#else #else
save_local_fpu(pr); if (get_cpulocal_var(fpu_owner) == pr) {
disable_fpu_exception();
save_local_fpu(pr);
}
#endif #endif
} }

1
kernel/glo.h
View File

@ -43,7 +43,6 @@ EXTERN int do_serial_debug;
EXTERN time_t boottime; EXTERN time_t boottime;
EXTERN char params_buffer[512]; /* boot monitor parameters */ EXTERN char params_buffer[512]; /* boot monitor parameters */
EXTERN int minix_panicing; EXTERN int minix_panicing;
EXTERN char fpu_presence;
EXTERN int verboseboot; /* verbose boot, init'ed in cstart */ EXTERN int verboseboot; /* verbose boot, init'ed in cstart */
#define MAGICTEST 0xC0FFEE23 #define MAGICTEST 0xC0FFEE23
EXTERN u32_t magictest; /* global magic number */ EXTERN u32_t magictest; /* global magic number */