1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * include/asm-alpha/processor.h 4 * 5 * Copyright (C) 1994 Linus Torvalds 6 */ 7 8 #ifndef __ASM_ALPHA_PROCESSOR_H 9 #define __ASM_ALPHA_PROCESSOR_H 10 11 /* 12 * We have a 42-bit user address space: 4TB user VM... 13 */ 14 #define TASK_SIZE (0x40000000000UL) 15 16 #define STACK_TOP (0x00120000000UL) 17 18 #define STACK_TOP_MAX 0x00120000000UL 19 20 /* This decides where the kernel will search for a free chunk of vm 21 * space during mmap's. 22 */ 23 #define TASK_UNMAPPED_BASE (TASK_SIZE / 2) 24 25 /* This is dead. Everything has been moved to thread_info. */ 26 struct thread_struct { }; 27 #define INIT_THREAD { } 28 29 static inline void arch_thread_struct_whitelist(unsigned long *offset, 30 unsigned long *size) 31 { 32 *offset = 0; 33 *size = 0; 34 } 35 36 /* Do necessary setup to start up a newly executed thread. */ 37 struct pt_regs; 38 extern void start_thread(struct pt_regs *, unsigned long, unsigned long); 39 40 /* Free all resources held by a thread. */ 41 struct task_struct; 42 unsigned long __get_wchan(struct task_struct *p); 43 44 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) 45 46 #define KSTK_ESP(tsk) \ 47 ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) 48 49 #define cpu_relax() barrier() 50 51 #define ARCH_HAS_PREFETCH 52 #define ARCH_HAS_PREFETCHW 53 54 extern inline void prefetch(const void *ptr) 55 { 56 __builtin_prefetch(ptr, 0, 3); 57 } 58 59 extern inline void prefetchw(const void *ptr) 60 { 61 __builtin_prefetch(ptr, 1, 3); 62 } 63 64 #endif /* __ASM_ALPHA_PROCESSOR_H */ 65