Merge branch 'master' of git://git.denx.de/u-boot-arm
[oweals/u-boot.git] / arch / arm / include / asm / proc-armv / processor.h
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/domain.h>
22
23 #define KERNEL_STACK_SIZE       PAGE_SIZE
24
25 struct 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