1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * include/asm-alpha/processor.h 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 1994 Linus Torvalds 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef __ASM_ALPHA_PROCESSOR_H 9*4882a593Smuzhiyun #define __ASM_ALPHA_PROCESSOR_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/personality.h> /* for ADDR_LIMIT_32BIT */ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun /* 14*4882a593Smuzhiyun * We have a 42-bit user address space: 4TB user VM... 15*4882a593Smuzhiyun */ 16*4882a593Smuzhiyun #define TASK_SIZE (0x40000000000UL) 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define STACK_TOP \ 19*4882a593Smuzhiyun (current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL) 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #define STACK_TOP_MAX 0x00120000000UL 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* This decides where the kernel will search for a free chunk of vm 24*4882a593Smuzhiyun * space during mmap's. 25*4882a593Smuzhiyun */ 26*4882a593Smuzhiyun #define TASK_UNMAPPED_BASE \ 27*4882a593Smuzhiyun ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2) 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun typedef struct { 30*4882a593Smuzhiyun unsigned long seg; 31*4882a593Smuzhiyun } mm_segment_t; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* This is dead. Everything has been moved to thread_info. */ 34*4882a593Smuzhiyun struct thread_struct { }; 35*4882a593Smuzhiyun #define INIT_THREAD { } 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun /* Do necessary setup to start up a newly executed thread. */ 38*4882a593Smuzhiyun struct pt_regs; 39*4882a593Smuzhiyun extern void start_thread(struct pt_regs *, unsigned long, unsigned long); 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* Free all resources held by a thread. */ 42*4882a593Smuzhiyun struct task_struct; 43*4882a593Smuzhiyun extern void release_thread(struct task_struct *); 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun unsigned long get_wchan(struct task_struct *p); 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun #define KSTK_ESP(tsk) \ 50*4882a593Smuzhiyun ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun #define cpu_relax() barrier() 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun #define ARCH_HAS_PREFETCH 55*4882a593Smuzhiyun #define ARCH_HAS_PREFETCHW 56*4882a593Smuzhiyun #define ARCH_HAS_SPINLOCK_PREFETCH 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun #ifndef CONFIG_SMP 59*4882a593Smuzhiyun /* Nothing to prefetch. */ 60*4882a593Smuzhiyun #define spin_lock_prefetch(lock) do { } while (0) 61*4882a593Smuzhiyun #endif 62*4882a593Smuzhiyun prefetch(const void * ptr)63*4882a593Smuzhiyunextern inline void prefetch(const void *ptr) 64*4882a593Smuzhiyun { 65*4882a593Smuzhiyun __builtin_prefetch(ptr, 0, 3); 66*4882a593Smuzhiyun } 67*4882a593Smuzhiyun prefetchw(const void * ptr)68*4882a593Smuzhiyunextern inline void prefetchw(const void *ptr) 69*4882a593Smuzhiyun { 70*4882a593Smuzhiyun __builtin_prefetch(ptr, 1, 3); 71*4882a593Smuzhiyun } 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun #ifdef CONFIG_SMP spin_lock_prefetch(const void * ptr)74*4882a593Smuzhiyunextern inline void spin_lock_prefetch(const void *ptr) 75*4882a593Smuzhiyun { 76*4882a593Smuzhiyun __builtin_prefetch(ptr, 1, 3); 77*4882a593Smuzhiyun } 78*4882a593Smuzhiyun #endif 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun #endif /* __ASM_ALPHA_PROCESSOR_H */ 81