diff options
Diffstat (limited to 'arch/xtensa/boot')
| -rw-r--r-- | arch/xtensa/boot/boot-elf/Makefile | 1 | ||||
| -rw-r--r-- | arch/xtensa/boot/boot-elf/boot.lds.S | 64 | ||||
| -rw-r--r-- | arch/xtensa/boot/boot-elf/bootstrap.S | 101 | ||||
| -rw-r--r-- | arch/xtensa/boot/boot-uboot/Makefile | 6 |
4 files changed, 118 insertions, 54 deletions
diff --git a/arch/xtensa/boot/boot-elf/Makefile b/arch/xtensa/boot/boot-elf/Makefile index 1fe01b78c124..89db089f5a12 100644 --- a/arch/xtensa/boot/boot-elf/Makefile +++ b/arch/xtensa/boot/boot-elf/Makefile @@ -12,6 +12,7 @@ endif export OBJCOPY_ARGS export CPPFLAGS_boot.lds += -P -C +export KBUILD_AFLAGS += -mtext-section-literals boot-y := bootstrap.o diff --git a/arch/xtensa/boot/boot-elf/boot.lds.S b/arch/xtensa/boot/boot-elf/boot.lds.S index 7b646e0a6486..932b58ef33d4 100644 --- a/arch/xtensa/boot/boot-elf/boot.lds.S +++ b/arch/xtensa/boot/boot-elf/boot.lds.S @@ -1,41 +1,29 @@ -#include <variant/core.h> +/* + * linux/arch/xtensa/boot/boot-elf/boot.lds.S + * + * Copyright (C) 2008 - 2013 by Tensilica Inc. + * + * Chris Zankel <chris@zankel.net> + * Marc Gauthier <marc@tensilica.com + * Pete Delaney <piet@tensilica.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <asm/vectors.h> OUTPUT_ARCH(xtensa) ENTRY(_ResetVector) SECTIONS { - .start 0xD0000000 : { *(.start) } - - .text 0xD0000000: - { - __reloc_start = . ; - _text_start = . ; - *(.literal .text.literal .text) - _text_end = . ; - } - - .rodata ALIGN(0x04): - { - *(.rodata) - *(.rodata1) - } - - .data ALIGN(0x04): + .ResetVector.text XCHAL_RESET_VECTOR_VADDR : { - *(.data) - *(.data1) - *(.sdata) - *(.sdata2) - *(.got.plt) - *(.got) - *(.dynamic) + *(.ResetVector.text) } - __reloc_end = . ; - - . = ALIGN(0x10); - __image_load = . ; - .image 0xd0001000: + .image KERNELOFFSET: AT (LOAD_MEMORY_ADDRESS) { _image_start = .; *(image) @@ -43,7 +31,6 @@ SECTIONS _image_end = . ; } - .bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3): { __bss_start = .; @@ -53,14 +40,15 @@ SECTIONS *(.bss) __bss_end = .; } - _end = .; - _param_start = .; - .ResetVector.text XCHAL_RESET_VECTOR_VADDR : + /* + * This is a remapped copy of the Reset Vector Code. + * It keeps gdb in sync with the PC after switching + * to the temporary mapping used while setting up + * the V2 MMU mappings for Linux. + */ + .ResetVector.remapped_text 0x46000000 (INFO): { - *(.ResetVector.text) + *(.ResetVector.remapped_text) } - - - PROVIDE (end = .); } diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S index 464298bc348b..1388a499753b 100644 --- a/arch/xtensa/boot/boot-elf/bootstrap.S +++ b/arch/xtensa/boot/boot-elf/bootstrap.S @@ -1,18 +1,77 @@ +/* + * 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 <linux/linkage.h> - -/* ResetVector - */ - .section .ResetVector.text, "ax" + .section .ResetVector.text, "ax" .global _ResetVector + .global reset + _ResetVector: - _j reset + _j _SetupMMU + + .begin no-absolute-literals + .literal_position + .align 4 RomInitAddr: - .word 0xd0001000 +#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \ + XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY + .word 0x00003000 +#else + .word 0xd0003000 +#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 + + Offset = _SetupMMU - _ResetVector + +#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 @@ -21,13 +80,25 @@ reset: jx a0 .align 4 - .section .bootstrap.data, "aw" - .globl _bootparam -_bootparam: - .short BP_TAG_FIRST - .short 4 - .long BP_VERSION - .short BP_TAG_LAST - .short 0 - .long 0 + .section .ResetVector.remapped_text, "x" + .global _RemappedResetVector + + /* Do org before literals */ + .org 0 + +_RemappedResetVector: + .begin no-absolute-literals + .literal_position + + _j _RemappedSetupMMU + + /* Position Remapped code at the same location as the original code */ + . = _RemappedResetVector + Offset + +_RemappedSetupMMU: +#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX + initialize_mmu +#endif + + .end no-absolute-literals diff --git a/arch/xtensa/boot/boot-uboot/Makefile b/arch/xtensa/boot/boot-uboot/Makefile index bfbf8af582f1..545759819ef9 100644 --- a/arch/xtensa/boot/boot-uboot/Makefile +++ b/arch/xtensa/boot/boot-uboot/Makefile @@ -4,7 +4,11 @@ # for more details. # -UIMAGE_LOADADDR = 0xd0001000 +ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX +UIMAGE_LOADADDR = 0x00003000 +else +UIMAGE_LOADADDR = 0xd0003000 +endif UIMAGE_COMPRESSION = gzip $(obj)/../uImage: vmlinux.bin.gz FORCE |