| /* |
| * 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 |
| |
| #if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \ |
| XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY |
| .literal RomInitAddr, CONFIG_KERNEL_LOAD_ADDRESS |
| #else |
| .literal RomInitAddr, KERNELOFFSET |
| #endif |
| #ifndef CONFIG_PARSE_BOOTPARAM |
| .literal RomBootParam, 0 |
| #else |
| .literal RomBootParam, _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 |
| |
| .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 |
