/* * 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) /* 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 *); /* Prepare to copy thread state - unlazy all lazy status */ #define prepare_to_copy(tsk) do { } while (0) /* 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_SMP extern inline void spin_lock_prefetch(const void *ptr) { __builtin_prefetch(ptr, 1, 3); } #endif #endif /* __ASM_ALPHA_PROCESSOR_H */