diff options
Diffstat (limited to 'arch/sh/include/asm/processor_32.h')
| -rw-r--r-- | arch/sh/include/asm/processor_32.h | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h index 46d5179c9f4..18e0377f72b 100644 --- a/arch/sh/include/asm/processor_32.h +++ b/arch/sh/include/asm/processor_32.h @@ -39,7 +39,7 @@ /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */ -#define TASK_UNMAPPED_BASE (TASK_SIZE / 3) +#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3) /* * Bit of SR register @@ -111,6 +111,16 @@ struct thread_struct { /* Extended processor state */ union thread_xstate *xstate; + + /* + * fpu_counter contains the number of consecutive context switches + * that the FPU is used. If this is over a threshold, the lazy fpu + * saving becomes unlazy to save the trap. This is an unsigned char + * so that after 256 times the counter wraps and the behavior turns + * lazy again; this to deal with bursty apps that only use FPU for + * a short time + */ + unsigned char fpu_counter; }; #define INIT_THREAD { \ @@ -126,14 +136,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned lo /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -void prepare_to_copy(struct task_struct *tsk); - -/* - * create a kernel thread without removing it from tasklists - */ -extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); - /* Copy and release all segment info associated with a VM */ #define copy_segments(p, mm) do { } while(0) #define release_segments(mm) do { } while(0) @@ -194,15 +196,20 @@ extern unsigned long get_wchan(struct task_struct *p); #define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[15]) #if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH4) + #define PREFETCH_STRIDE L1_CACHE_BYTES #define ARCH_HAS_PREFETCH #define ARCH_HAS_PREFETCHW -static inline void prefetch(void *x) + +static inline void prefetch(const void *x) { - __asm__ __volatile__ ("pref @%0\n\t" : : "r" (x) : "memory"); + __builtin_prefetch(x, 0, 3); } -#define prefetchw(x) prefetch(x) +static inline void prefetchw(const void *x) +{ + __builtin_prefetch(x, 1, 3); +} #endif #endif /* __KERNEL__ */ |