/*
 * Copyright (c) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef KERN_mips32_CONTEXT_OFFSET_H_
#define KERN_mips32_CONTEXT_OFFSET_H_

#define OFFSET_SP      0x0
#define OFFSET_PC      0x4
#define OFFSET_S0      0x8
#define OFFSET_S1      0xc
#define OFFSET_S2      0x10
#define OFFSET_S3      0x14
#define OFFSET_S4      0x18
#define OFFSET_S5      0x1c
#define OFFSET_S6      0x20
#define OFFSET_S7      0x24
#define OFFSET_S8      0x28
#define OFFSET_GP      0x2c

#ifdef KERNEL
# define OFFSET_IPL     0x30
#else
# define OFFSET_TLS     0x30

# define OFFSET_F20     0x34
# define OFFSET_F21     0x38
# define OFFSET_F22     0x3c
# define OFFSET_F23     0x40
# define OFFSET_F24     0x44
# define OFFSET_F25     0x48
# define OFFSET_F26     0x4c
# define OFFSET_F27     0x50
# define OFFSET_F28     0x54
# define OFFSET_F29     0x58
# define OFFSET_F30     0x5c
#endif /* KERNEL */

/* istate_t */
#define EOFFSET_AT     0x0
#define EOFFSET_V0     0x4
#define EOFFSET_V1     0x8
#define EOFFSET_A0     0xc
#define EOFFSET_A1     0x10
#define EOFFSET_A2     0x14
#define EOFFSET_A3     0x18
#define EOFFSET_T0     0x1c
#define EOFFSET_T1     0x20
#define EOFFSET_T2     0x24
#define EOFFSET_T3     0x28
#define EOFFSET_T4     0x2c
#define EOFFSET_T5     0x30
#define EOFFSET_T6     0x34
#define EOFFSET_T7     0x38
#define EOFFSET_T8     0x3c
#define EOFFSET_T9     0x40
#define EOFFSET_GP     0x44
#define EOFFSET_SP     0x48
#define EOFFSET_RA     0x4c
#define EOFFSET_LO     0x50
#define EOFFSET_HI     0x54
#define EOFFSET_STATUS 0x58
#define EOFFSET_EPC    0x5c
#define EOFFSET_K1     0x60
#define REGISTER_SPACE 104	/* respect stack alignment */

#ifdef __ASM__

#include <arch/asm/regname.h>

# ctx: address of the structure with saved context
.macro CONTEXT_SAVE_ARCH_CORE ctx:req
	sw $s0,OFFSET_S0(\ctx)
	sw $s1,OFFSET_S1(\ctx)
	sw $s2,OFFSET_S2(\ctx)
	sw $s3,OFFSET_S3(\ctx)
	sw $s4,OFFSET_S4(\ctx)
	sw $s5,OFFSET_S5(\ctx)
	sw $s6,OFFSET_S6(\ctx)
	sw $s7,OFFSET_S7(\ctx)
	sw $s8,OFFSET_S8(\ctx)
	sw $gp,OFFSET_GP(\ctx)

#ifndef KERNEL
	sw $k1,OFFSET_TLS(\ctx)

#ifdef CONFIG_FPU
	mfc1 $t0,$20
	sw $t0, OFFSET_F20(\ctx)

	mfc1 $t0,$21
	sw $t0, OFFSET_F21(\ctx)

	mfc1 $t0,$22
	sw $t0, OFFSET_F22(\ctx)

	mfc1 $t0,$23
	sw $t0, OFFSET_F23(\ctx)

	mfc1 $t0,$24
	sw $t0, OFFSET_F24(\ctx)

	mfc1 $t0,$25
	sw $t0, OFFSET_F25(\ctx)

	mfc1 $t0,$26
	sw $t0, OFFSET_F26(\ctx)

	mfc1 $t0,$27
	sw $t0, OFFSET_F27(\ctx)

	mfc1 $t0,$28
	sw $t0, OFFSET_F28(\ctx)

	mfc1 $t0,$29
	sw $t0, OFFSET_F29(\ctx)
	
	mfc1 $t0,$30
	sw $t0, OFFSET_F30(\ctx)
#endif /* CONFIG_FPU */
#endif /* KERNEL */

	sw $ra,OFFSET_PC(\ctx)
	sw $sp,OFFSET_SP(\ctx)
.endm

# ctx: address of the structure with saved context
.macro CONTEXT_RESTORE_ARCH_CORE ctx:req
	lw $s0,OFFSET_S0(\ctx)
	lw $s1,OFFSET_S1(\ctx)
	lw $s2,OFFSET_S2(\ctx)
	lw $s3,OFFSET_S3(\ctx)
	lw $s4,OFFSET_S4(\ctx)
	lw $s5,OFFSET_S5(\ctx)
	lw $s6,OFFSET_S6(\ctx)
	lw $s7,OFFSET_S7(\ctx)
	lw $s8,OFFSET_S8(\ctx)
	lw $gp,OFFSET_GP(\ctx)
#ifndef KERNEL
	lw $k1,OFFSET_TLS(\ctx)

#ifdef CONFIG_FPU
	lw $t0, OFFSET_F20(\ctx)
	mtc1 $t0,$20

	lw $t0, OFFSET_F21(\ctx)
	mtc1 $t0,$21

	lw $t0, OFFSET_F22(\ctx)
	mtc1 $t0,$22

	lw $t0, OFFSET_F23(\ctx)
	mtc1 $t0,$23

	lw $t0, OFFSET_F24(\ctx)
	mtc1 $t0,$24

	lw $t0, OFFSET_F25(\ctx)
	mtc1 $t0,$25

	lw $t0, OFFSET_F26(\ctx)
	mtc1 $t0,$26

	lw $t0, OFFSET_F27(\ctx)
	mtc1 $t0,$27

	lw $t0, OFFSET_F28(\ctx)
	mtc1 $t0,$28

	lw $t0, OFFSET_F29(\ctx)
	mtc1 $t0,$29

	lw $t0, OFFSET_F30(\ctx)
	mtc1 $t0,$30
#endif /* CONFIG_FPU */
#endif /* KERNEL */

	lw $ra,OFFSET_PC(\ctx)
	lw $sp,OFFSET_SP(\ctx)
.endm

#endif


#endif