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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/avr32/include/asm/asm.h
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/*

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 * Copyright (C) 2004-2006 Atmel Corporation

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 */

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#ifndef __ASM_AVR32_ASM_H__

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#define __ASM_AVR32_ASM_H__

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#include <asm/sysreg.h>

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#include <asm/asm-offsets.h>

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#include <asm/thread_info.h>

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#define mask_interrupts		ssrf	SYSREG_GM_OFFSET

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#define mask_exceptions		ssrf	SYSREG_EM_OFFSET

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#define unmask_interrupts	csrf	SYSREG_GM_OFFSET

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#define unmask_exceptions	csrf	SYSREG_EM_OFFSET

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#ifdef CONFIG_FRAME_POINTER

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	.macro	save_fp

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	st.w	--sp, r7

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	.endm

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	.macro	restore_fp

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	ld.w	r7, sp++

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	.endm

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	.macro	zero_fp

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	mov	r7, 0

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	.endm

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#else

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	.macro	save_fp

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	.endm

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	.macro	restore_fp

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	.endm

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	.macro	zero_fp

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	.endm

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#endif

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	.macro	get_thread_info reg

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	mov	\reg, sp

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	andl	\reg, ~(THREAD_SIZE - 1) & 0xffff

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	.endm

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	/* Save and restore registers */

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	.macro	save_min sr, tmp=lr

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	pushm	lr

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	mfsr	\tmp, \sr

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	zero_fp

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	st.w	--sp, \tmp

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	.endm

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	.macro	restore_min sr, tmp=lr

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	ld.w	\tmp, sp++

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	mtsr	\sr, \tmp

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	popm	lr

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	.endm

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	.macro	save_half sr, tmp=lr

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	save_fp

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	pushm	r8-r9,r10,r11,r12,lr

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	zero_fp

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	mfsr	\tmp, \sr

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	st.w	--sp, \tmp

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	.endm

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	.macro	restore_half sr, tmp=lr

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	ld.w	\tmp, sp++

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	mtsr	\sr, \tmp

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	popm	r8-r9,r10,r11,r12,lr

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	restore_fp

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	.endm

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	.macro	save_full_user sr, tmp=lr

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	stmts	--sp, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr

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	st.w	--sp, lr

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	zero_fp

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	mfsr	\tmp, \sr

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	st.w	--sp, \tmp

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	.endm

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	.macro	restore_full_user sr, tmp=lr

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	ld.w	\tmp, sp++

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	mtsr	\sr, \tmp

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	ld.w	lr, sp++

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	ldmts	sp++, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr

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	.endm

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	/* uaccess macros */

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	.macro branch_if_kernel scratch, label

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	get_thread_info \scratch

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	ld.w	\scratch, \scratch[TI_flags]

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	bld	\scratch, TIF_USERSPACE

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	brcc	\label

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	.endm

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	.macro ret_if_privileged scratch, addr, size, ret

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	sub	\scratch, \size, 1

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	add	\scratch, \addr

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	retcs	\ret

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	retmi	\ret

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	.endm

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#endif /* __ASM_AVR32_ASM_H__ */

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