85 lines
1.8 KiB
ArmAsm
85 lines
1.8 KiB
ArmAsm
/*
|
|
* Xtensa Secondary Processors startup code.
|
|
*
|
|
* 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) 2001 - 2013 Tensilica Inc.
|
|
*
|
|
* Joe Taylor <joe@tensilica.com>
|
|
* Chris Zankel <chris@zankel.net>
|
|
* Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
|
|
* Pete Delaney <piet@tensilica.com>
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/cacheasm.h>
|
|
#include <asm/initialize_mmu.h>
|
|
#include <asm/mxregs.h>
|
|
#include <asm/regs.h>
|
|
|
|
|
|
.section .SecondaryResetVector.text, "ax"
|
|
|
|
|
|
ENTRY(_SecondaryResetVector)
|
|
_j _SetupOCD
|
|
|
|
.begin no-absolute-literals
|
|
.literal_position
|
|
|
|
_SetupOCD:
|
|
/*
|
|
* Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
|
|
* Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
|
|
* xt-gdb to single step via DEBUG exceptions received directly
|
|
* by ocd.
|
|
*/
|
|
movi a1, 1
|
|
movi a0, 0
|
|
wsr a1, windowstart
|
|
wsr a0, windowbase
|
|
rsync
|
|
|
|
movi a1, LOCKLEVEL
|
|
wsr a1, ps
|
|
rsync
|
|
|
|
_SetupMMU:
|
|
Offset = _SetupMMU - _SecondaryResetVector
|
|
|
|
#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
|
|
initialize_mmu
|
|
#endif
|
|
|
|
/*
|
|
* Start Secondary Processors with NULL pointer to boot params.
|
|
*/
|
|
movi a2, 0 # a2 == NULL
|
|
movi a3, _startup
|
|
jx a3
|
|
|
|
.end no-absolute-literals
|
|
|
|
|
|
.section .SecondaryResetVector.remapped_text, "ax"
|
|
.global _RemappedSecondaryResetVector
|
|
|
|
.org 0 # Need to do org before literals
|
|
|
|
_RemappedSecondaryResetVector:
|
|
.begin no-absolute-literals
|
|
.literal_position
|
|
|
|
_j _RemappedSetupMMU
|
|
. = _RemappedSecondaryResetVector + Offset
|
|
|
|
_RemappedSetupMMU:
|
|
|
|
#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
|
|
initialize_mmu
|
|
#endif
|
|
|
|
.end no-absolute-literals
|