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#

# Copyright (C) 2003-2004 Jakub Jermar

# 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

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# - The name of the author may not be used to endorse or promote products

#   derived from this software without specific prior written permission.

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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

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#include <arch/asm/regname.h>

#include <arch/context_offset.h>

.text   

.set noat

.set noreorder

.set nomacro

.global context_save_arch

.global context_restore_arch

.macro CONTEXT_STORE r

	sw $s0,OFFSET_S0(\r)

	sw $s1,OFFSET_S1(\r)

	sw $s2,OFFSET_S2(\r)

	sw $s3,OFFSET_S3(\r)

	sw $s4,OFFSET_S4(\r)

	sw $s5,OFFSET_S5(\r)

	sw $s6,OFFSET_S6(\r)

	sw $s7,OFFSET_S7(\r)

	sw $s8,OFFSET_S8(\r)

	sw $gp,OFFSET_GP(\r)

	sw $ra,OFFSET_PC(\r)

	sw $sp,OFFSET_SP(\r)

.endm

.macro CONTEXT_LOAD r

	lw $s0,OFFSET_S0(\r)

	lw $s1,OFFSET_S1(\r)

	lw $s2,OFFSET_S2(\r)

	lw $s3,OFFSET_S3(\r)

	lw $s4,OFFSET_S4(\r)

	lw $s5,OFFSET_S5(\r)

	lw $s6,OFFSET_S6(\r)

	lw $s7,OFFSET_S7(\r)

	lw $s8,OFFSET_S8(\r)

	lw $gp,OFFSET_GP(\r)

	lw $ra,OFFSET_PC(\r)

	lw $sp,OFFSET_SP(\r)

.endm

context_save_arch:

	CONTEXT_STORE $a0

	# context_save returns 1

	j $31

	li $2, 1	

context_restore_arch:

	CONTEXT_LOAD $a0

	# context_restore returns 0

	j $31

	xor $2, $2