80 lines
1.5 KiB
ArmAsm
80 lines
1.5 KiB
ArmAsm
/*
|
|
* 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/processor.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/page.h>
|
|
#include <asm/cacheasm.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
|
|
|
|
.align 4
|
|
RomInitAddr:
|
|
#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
|
|
XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
|
|
.word CONFIG_KERNEL_LOAD_ADDRESS
|
|
#else
|
|
.word KERNELOFFSET
|
|
#endif
|
|
RomBootParam:
|
|
.word _bootparam
|
|
_bootparam:
|
|
.short BP_TAG_FIRST
|
|
.short 4
|
|
.long BP_VERSION
|
|
.short BP_TAG_LAST
|
|
.short 0
|
|
.long 0
|
|
|
|
.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
|
|
|
|
.end no-absolute-literals
|
|
|
|
rsil a0, XCHAL_DEBUGLEVEL-1
|
|
rsync
|
|
reset:
|
|
l32r a0, RomInitAddr
|
|
l32r a2, RomBootParam
|
|
movi a3, 0
|
|
movi a4, 0
|
|
jx a0
|