projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5f97f7f9 HS |
1 | /* |
| 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 | ||
| 15 | #define mask_interrupts ssrf SR_GM_BIT | |
| 16 | #define mask_exceptions ssrf SR_EM_BIT | |
| 17 | #define unmask_interrupts csrf SR_GM_BIT | |
| 18 | #define unmask_exceptions csrf SR_EM_BIT | |
| 19 | ||
| 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__ */ |