asm.h
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/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_AVR32_ASM_H__
#define __ASM_AVR32_ASM_H__
#include <asm/sysreg.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#define mask_interrupts ssrf SYSREG_GM_OFFSET
#define mask_exceptions ssrf SYSREG_EM_OFFSET
#define unmask_interrupts csrf SYSREG_GM_OFFSET
#define unmask_exceptions csrf SYSREG_EM_OFFSET
#ifdef CONFIG_FRAME_POINTER
.macro save_fp
st.w --sp, r7
.endm
.macro restore_fp
ld.w r7, sp++
.endm
.macro zero_fp
mov r7, 0
.endm
#else
.macro save_fp
.endm
.macro restore_fp
.endm
.macro zero_fp
.endm
#endif
.macro get_thread_info reg
mov \reg, sp
andl \reg, ~(THREAD_SIZE - 1) & 0xffff
.endm
/* Save and restore registers */
.macro save_min sr, tmp=lr
pushm lr
mfsr \tmp, \sr
zero_fp
st.w --sp, \tmp
.endm
.macro restore_min sr, tmp=lr
ld.w \tmp, sp++
mtsr \sr, \tmp
popm lr
.endm
.macro save_half sr, tmp=lr
save_fp
pushm r8-r9,r10,r11,r12,lr
zero_fp
mfsr \tmp, \sr
st.w --sp, \tmp
.endm
.macro restore_half sr, tmp=lr
ld.w \tmp, sp++
mtsr \sr, \tmp
popm r8-r9,r10,r11,r12,lr
restore_fp
.endm
.macro save_full_user sr, tmp=lr
stmts --sp, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
st.w --sp, lr
zero_fp
mfsr \tmp, \sr
st.w --sp, \tmp
.endm
.macro restore_full_user sr, tmp=lr
ld.w \tmp, sp++
mtsr \sr, \tmp
ld.w lr, sp++
ldmts sp++, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
.endm
/* uaccess macros */
.macro branch_if_kernel scratch, label
get_thread_info \scratch
ld.w \scratch, \scratch[TI_flags]
bld \scratch, TIF_USERSPACE
brcc \label
.endm
.macro ret_if_privileged scratch, addr, size, ret
sub \scratch, \size, 1
add \scratch, \addr
retcs \ret
retmi \ret
.endm
#endif /* __ASM_AVR32_ASM_H__ */