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