diff options
Diffstat (limited to 'arch/sparc/include/asm/processor_64.h')
| -rw-r--r-- | arch/sparc/include/asm/processor_64.h | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h index 0305d56d9b1..7028fe1a7c0 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -18,9 +18,6 @@ #include <asm/ptrace.h> #include <asm/page.h> -/* Don't hold the runqueue lock over context switch */ -#define __ARCH_WANT_UNLOCKED_CTXSW - /* The sparc has no problems with write protection */ #define wp_works_ok 1 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */ @@ -98,7 +95,7 @@ struct thread_struct { /* Return saved PC of a blocked thread. */ struct task_struct; -extern unsigned long thread_saved_pc(struct task_struct *); +unsigned long thread_saved_pc(struct task_struct *); /* On Uniprocessor, even in RMO processes see TSO semantics */ #ifdef CONFIG_SMP @@ -197,13 +194,28 @@ do { \ /* Free all resources held by a thread. */ #define release_thread(tsk) do { } while (0) -extern unsigned long get_wchan(struct task_struct *task); +unsigned long get_wchan(struct task_struct *task); #define task_pt_regs(tsk) (task_thread_info(tsk)->kregs) #define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc) #define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP]) -#define cpu_relax() barrier() +/* Please see the commentary in asm/backoff.h for a description of + * what these instructions are doing and how they have been choosen. + * To make a long story short, we are trying to yield the current cpu + * strand during busy loops. + */ +#define cpu_relax() asm volatile("\n99:\n\t" \ + "rd %%ccr, %%g0\n\t" \ + "rd %%ccr, %%g0\n\t" \ + "rd %%ccr, %%g0\n\t" \ + ".section .pause_3insn_patch,\"ax\"\n\t"\ + ".word 99b\n\t" \ + "wr %%g0, 128, %%asr27\n\t" \ + "nop\n\t" \ + "nop\n\t" \ + ".previous" \ + ::: "memory") /* Prefetch support. This is tuned for UltraSPARC-III and later. * UltraSPARC-I will treat these as nops, and UltraSPARC-II has @@ -241,6 +253,8 @@ static inline void prefetchw(const void *x) #define HAVE_ARCH_PICK_MMAP_LAYOUT +int do_mathemu(struct pt_regs *regs, struct fpustate *f, bool illegal_insn_trap); + #endif /* !(__ASSEMBLY__) */ #endif /* !(__ASM_SPARC64_PROCESSOR_H) */ |