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/*
* arch/xtensa/boot/boot-elf/bootstrap.S
*
* Low-level exception handling
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2004 - 2013 by Tensilica Inc.
*
* Chris Zankel <chris@zankel.net>
* Marc Gauthier <marc@tensilica.com>
* Piet Delaney <piet@tensilica.com>
*/
#include <asm/bootparam.h>
#include <asm/initialize_mmu.h>
#include <asm/vectors.h>
#include <linux/linkage.h>
.section .ResetVector.text, "ax"
.global _ResetVector
.global reset
_ResetVector:
_j _SetupMMU
.begin no-absolute-literals
.literal_position
#ifdef CONFIG_PARSE_BOOTPARAM
.align 4
_bootparam:
.short BP_TAG_FIRST
.short 4
.long BP_VERSION
.short BP_TAG_LAST
.short 0
.long 0
#endif
.align 4
_SetupMMU:
movi a0, 0
wsr a0, windowbase
rsync
movi a0, 1
wsr a0, windowstart
rsync
movi a0, 0x1F
wsr a0, ps
rsync
#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
initialize_mmu
#endif
rsil a0, XCHAL_DEBUGLEVEL-1
rsync
reset:
#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
movi a0, CONFIG_KERNEL_LOAD_ADDRESS
#else
movi a0, KERNELOFFSET
#endif
#ifdef CONFIG_PARSE_BOOTPARAM
movi a2, _bootparam
#else
movi a2, 0
#endif
movi a3, 0
movi a4, 0
jx a0
.end no-absolute-literals
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