1/*
2 *  linux/include/asm-arm/proc-armv/processor.h
3 *
4 *  Copyright (C) 1996-1999 Russell King.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 *  Changelog:
11 *   20-09-1996	RMK	Created
12 *   26-09-1996	RMK	Added 'EXTRA_THREAD_STRUCT*'
13 *   28-09-1996	RMK	Moved start_thread into the processor dependencies
14 *   09-09-1998	PJB	Delete redundant `wp_works_ok'
15 *   30-05-1999	PJB	Save sl across context switches
16 *   31-07-1999	RMK	Added 'domain' stuff
17 */
18#ifndef __ASM_PROC_PROCESSOR_H
19#define __ASM_PROC_PROCESSOR_H
20
21#include <asm/proc-armv/domain.h>
22
23#define KERNEL_STACK_SIZE	PAGE_SIZE
24
25struct context_save_struct {
26	unsigned long cpsr;
27	unsigned long r4;
28	unsigned long r5;
29	unsigned long r6;
30	unsigned long r7;
31	unsigned long r8;
32	unsigned long r9;
33	unsigned long sl;
34	unsigned long fp;
35	unsigned long pc;
36};
37
38#define INIT_CSS (struct context_save_struct){ SVC_MODE, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
39
40#define EXTRA_THREAD_STRUCT						\
41	unsigned int	domain;
42
43#define EXTRA_THREAD_STRUCT_INIT					\
44	domain:	  domain_val(DOMAIN_USER, DOMAIN_CLIENT) |		\
45		  domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) |		\
46		  domain_val(DOMAIN_IO, DOMAIN_CLIENT)
47
48#define start_thread(regs,pc,sp)					\
49({									\
50	unsigned long *stack = (unsigned long *)sp;			\
51	set_fs(USER_DS);						\
52	memzero(regs->uregs, sizeof(regs->uregs));			\
53	if (current->personality & ADDR_LIMIT_32BIT)			\
54		regs->ARM_cpsr = USR_MODE;				\
55	else								\
56		regs->ARM_cpsr = USR26_MODE;				\
57	regs->ARM_pc = pc;		/* pc */			\
58	regs->ARM_sp = sp;		/* sp */			\
59	regs->ARM_r2 = stack[2];	/* r2 (envp) */			\
60	regs->ARM_r1 = stack[1];	/* r1 (argv) */			\
61	regs->ARM_r0 = stack[0];	/* r0 (argc) */			\
62})
63
64#define KSTK_EIP(tsk)	(((unsigned long *)(4096+(unsigned long)(tsk)))[1019])
65#define KSTK_ESP(tsk)	(((unsigned long *)(4096+(unsigned long)(tsk)))[1017])
66
67/* Allocation and freeing of basic task resources. */
68/*
69 * NOTE! The task struct and the stack go together
70 */
71#define ll_alloc_task_struct() ((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
72#define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
73
74#endif
75