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| author | Jeff Garzik <jeff@garzik.org> | 2006-04-20 17:27:45 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-04-20 17:27:45 -0400 |
| commit | 9707b27100a48950f1e15e08a7c5028786e47f55 (patch) | |
| tree | 5745b1e7497ae1499a2e2e9e0a567996419ab34f /include/asm-mips/system.h | |
| parent | 8fc65162a8f25929be80c8d6321a3479e92b5aae (diff) | |
| parent | 402a26f0c040077ed6f941eefac5a6971f0d5f40 (diff) | |
Merge branch 'master'
Diffstat (limited to 'include/asm-mips/system.h')
| -rw-r--r-- | include/asm-mips/system.h | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h index 4097fac5ac3..261f71d16a0 100644 --- a/include/asm-mips/system.h +++ b/include/asm-mips/system.h @@ -155,6 +155,37 @@ extern asmlinkage void *resume(void *last, void *next, void *next_ti); struct task_struct; +#ifdef CONFIG_MIPS_MT_FPAFF + +/* + * Handle the scheduler resume end of FPU affinity management. We do this + * inline to try to keep the overhead down. If we have been forced to run on + * a "CPU" with an FPU because of a previous high level of FP computation, + * but did not actually use the FPU during the most recent time-slice (CU1 + * isn't set), we undo the restriction on cpus_allowed. + * + * We're not calling set_cpus_allowed() here, because we have no need to + * force prompt migration - we're already switching the current CPU to a + * different thread. + */ + +#define switch_to(prev,next,last) \ +do { \ + if (cpu_has_fpu && \ + (prev->thread.mflags & MF_FPUBOUND) && \ + (!(KSTK_STATUS(prev) & ST0_CU1))) { \ + prev->thread.mflags &= ~MF_FPUBOUND; \ + prev->cpus_allowed = prev->thread.user_cpus_allowed; \ + } \ + if (cpu_has_dsp) \ + __save_dsp(prev); \ + next->thread.emulated_fp = 0; \ + (last) = resume(prev, next, next->thread_info); \ + if (cpu_has_dsp) \ + __restore_dsp(current); \ +} while(0) + +#else #define switch_to(prev,next,last) \ do { \ if (cpu_has_dsp) \ @@ -163,6 +194,7 @@ do { \ if (cpu_has_dsp) \ __restore_dsp(current); \ } while(0) +#endif /* * On SMP systems, when the scheduler does migration-cost autodetection, @@ -440,8 +472,8 @@ static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old, extern void set_handler (unsigned long offset, void *addr, unsigned long len); extern void set_uncached_handler (unsigned long offset, void *addr, unsigned long len); extern void *set_vi_handler (int n, void *addr); -extern void *set_vi_srs_handler (int n, void *addr, int regset); extern void *set_except_vector(int n, void *addr); +extern unsigned long ebase; extern void per_cpu_trap_init(void); extern NORET_TYPE void die(const char *, struct pt_regs *); |