[linux-2.6-block.git] / arch / alpha / include / asm / processor.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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 */

/*
 * 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)

/* This is dead.  Everything has been moved to thread_info.  */
struct thread_struct { };
#define INIT_THREAD  { }

/* Do necessary setup to start up a newly executed thread.  */
struct pt_regs;
extern void start_thread(struct pt_regs *, unsigned long, unsigned long);

/* Free all resources held by a thread. */
struct task_struct;
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

extern inline void prefetch(const void *ptr)  
{ 
	__builtin_prefetch(ptr, 0, 3);
}

extern inline void prefetchw(const void *ptr)  
{
	__builtin_prefetch(ptr, 1, 3);
}

#endif /* __ASM_ALPHA_PROCESSOR_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	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	#include <linux/personality.h> /* for ADDR_LIMIT_32BIT */
	12
1da177e4 LT	13	/*
	14	* We have a 42-bit user address space: 4TB user VM...
	15	*/
	16	#define TASK_SIZE (0x40000000000UL)
	17
922a70d3 DH	18	#define STACK_TOP \
	19	(current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)
	20
	21	#define STACK_TOP_MAX 0x00120000000UL
	22
1da177e4 LT	23	/* This decides where the kernel will search for a free chunk of vm
	24	* space during mmap's.
	25	*/
	26	#define TASK_UNMAPPED_BASE \
	27	((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2)
	28
1da177e4 LT	29	/* This is dead. Everything has been moved to thread_info. */
	30	struct thread_struct { };
	31	#define INIT_THREAD { }
	32
1da177e4	33	/* Do necessary setup to start up a newly executed thread. */
396ada68	34	struct pt_regs;
1da177e4 LT	35	extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
	36
	37	/* Free all resources held by a thread. */
16dc17ee	38	struct task_struct;
42a20f86	39	unsigned long __get_wchan(struct task_struct *p);
1da177e4	40
e52f4ca2	41	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
1da177e4 LT	42
1da177e4 LT	43	#define KSTK_ESP(tsk) \
37bfbaf9	44	((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)
1da177e4 LT	45
	46	#define cpu_relax() barrier()
	47
	48	#define ARCH_HAS_PREFETCH
	49	#define ARCH_HAS_PREFETCHW
1da177e4	50
1da177e4 LT	51	extern inline void prefetch(const void *ptr)
	52	{
	53	__builtin_prefetch(ptr, 0, 3);
	54	}
	55
	56	extern inline void prefetchw(const void *ptr)
	57	{
	58	__builtin_prefetch(ptr, 1, 3);
	59	}
	60
1da177e4	61	#endif /* __ASM_ALPHA_PROCESSOR_H */