/* * include/asm-alpha/processor.h * * Copyright (C) 1994 Linus Torvalds */ #ifndef __ASM_ALPHA_PROCESSOR_H#define __ASM_ALPHA_PROCESSOR_H #include <linux/personality.h>	/* for ADDR_LIMIT_32BIT */ /* * Returns current instruction pointer ("program counter"). */#define current_text_addr() \  ({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; }) /* * We have a 42-bit user address space: 4TB user VM... */#define TASK_SIZE (0x40000000000UL) #define STACK_TOP \  (current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL) #define STACK_TOP_MAX	0x00120000000UL /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE \  ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2) typedef struct {	unsigned long seg;} mm_segment_t; /* This is dead.  Everything has been moved to thread_info.  */struct thread_struct { };#define INIT_THREAD  { } /* Return saved PC of a blocked thread.  */struct task_struct;extern unsigned long thread_saved_pc(struct task_struct *); /* Do necessary setup to start up a newly executed thread.  */extern void start_thread(struct pt_regs *, unsigned long, unsigned long); /* Free all resources held by a thread. */extern void release_thread(struct task_struct *); /* Create a kernel thread without removing it from tasklists.  */extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); unsigned long get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) #define KSTK_ESP(tsk) \  ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) #define cpu_relax()	barrier() #define ARCH_HAS_PREFETCH#define ARCH_HAS_PREFETCHW#define ARCH_HAS_SPINLOCK_PREFETCH #ifndef CONFIG_SMP/* Nothing to prefetch. */#define spin_lock_prefetch(lock)  	do { } while (0)#endif extern inline void prefetch(const void *ptr)  { 	__builtin_prefetch(ptr, 0, 3);} extern inline void prefetchw(const void *ptr)  {	__builtin_prefetch(ptr, 1, 3);} #ifdef CONFIG_SMPextern inline void spin_lock_prefetch(const void *ptr)  {	__builtin_prefetch(ptr, 1, 3);}#endif #endif /* __ASM_ALPHA_PROCESSOR_H */