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Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -07001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#ifndef __ASM_AVR32_ASM_H__
9#define __ASM_AVR32_ASM_H__
10
11#include <asm/sysreg.h>
12#include <asm/asm-offsets.h>
13#include <asm/thread_info.h>
14
Haavard Skinnemoen02f99d12008-02-24 23:19:22 +010015#define mask_interrupts ssrf SYSREG_GM_OFFSET
16#define mask_exceptions ssrf SYSREG_EM_OFFSET
17#define unmask_interrupts csrf SYSREG_GM_OFFSET
18#define unmask_exceptions csrf SYSREG_EM_OFFSET
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -070019
20#ifdef CONFIG_FRAME_POINTER
21 .macro save_fp
22 st.w --sp, r7
23 .endm
24 .macro restore_fp
25 ld.w r7, sp++
26 .endm
27 .macro zero_fp
28 mov r7, 0
29 .endm
30#else
31 .macro save_fp
32 .endm
33 .macro restore_fp
34 .endm
35 .macro zero_fp
36 .endm
37#endif
38 .macro get_thread_info reg
39 mov \reg, sp
40 andl \reg, ~(THREAD_SIZE - 1) & 0xffff
41 .endm
42
43 /* Save and restore registers */
44 .macro save_min sr, tmp=lr
45 pushm lr
46 mfsr \tmp, \sr
47 zero_fp
48 st.w --sp, \tmp
49 .endm
50
51 .macro restore_min sr, tmp=lr
52 ld.w \tmp, sp++
53 mtsr \sr, \tmp
54 popm lr
55 .endm
56
57 .macro save_half sr, tmp=lr
58 save_fp
59 pushm r8-r9,r10,r11,r12,lr
60 zero_fp
61 mfsr \tmp, \sr
62 st.w --sp, \tmp
63 .endm
64
65 .macro restore_half sr, tmp=lr
66 ld.w \tmp, sp++
67 mtsr \sr, \tmp
68 popm r8-r9,r10,r11,r12,lr
69 restore_fp
70 .endm
71
72 .macro save_full_user sr, tmp=lr
73 stmts --sp, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
74 st.w --sp, lr
75 zero_fp
76 mfsr \tmp, \sr
77 st.w --sp, \tmp
78 .endm
79
80 .macro restore_full_user sr, tmp=lr
81 ld.w \tmp, sp++
82 mtsr \sr, \tmp
83 ld.w lr, sp++
84 ldmts sp++, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
85 .endm
86
87 /* uaccess macros */
88 .macro branch_if_kernel scratch, label
89 get_thread_info \scratch
90 ld.w \scratch, \scratch[TI_flags]
91 bld \scratch, TIF_USERSPACE
92 brcc \label
93 .endm
94
95 .macro ret_if_privileged scratch, addr, size, ret
96 sub \scratch, \size, 1
97 add \scratch, \addr
98 retcs \ret
99 retmi \ret
100 .endm
101
102#endif /* __ASM_AVR32_ASM_H__ */