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author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2012-07-28 01:25:56 +0800 |
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committer | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2012-08-03 18:09:13 +0800 |
commit | 78867e2bbd066df7d56e281e03a8cdbe82adf4e4 (patch) | |
tree | 311c827a5dc95a2d557f2c308a87f9808aede902 /arch/arm/pbl | |
parent | d4c42fb33deb6c061e4410520a6601fb2d072a60 (diff) | |
download | barebox-78867e2bbd066df7d56e281e03a8cdbe82adf4e4.tar.gz barebox-78867e2bbd066df7d56e281e03a8cdbe82adf4e4.tar.xz |
Add pre-bootloader (pbl) image support
This allows for creating a pre-bootloader binary for
- nand boot
- mmc boot
- compressed image
The pbl will be incharge of the lowlevel init if needed.
The barebox will skip it.
Import string functions from linux 3.4 (arch/arm/boot/compressed/string.c) and
implement a dummy panic.
For now on introduce dummy zbarebox* targets and c code that will contain later
the decompressor. This only implemeted on ARM.
This patch is based on Sascha Hauer <s.hauer@pengutronix.de>
Add compressed image support patch
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'arch/arm/pbl')
-rw-r--r-- | arch/arm/pbl/Makefile | 25 | ||||
-rw-r--r-- | arch/arm/pbl/zbarebox.lds.S | 73 |
2 files changed, 98 insertions, 0 deletions
diff --git a/arch/arm/pbl/Makefile b/arch/arm/pbl/Makefile new file mode 100644 index 0000000000..9b364bb35a --- /dev/null +++ b/arch/arm/pbl/Makefile @@ -0,0 +1,25 @@ + +OBJCOPYFLAGS_zbarebox.bin = -O binary + +targets := zbarebox.lds zbarebox zbarebox.bin zbarebox.S + +$(obj)/zbarebox.bin: $(obj)/zbarebox FORCE + $(call if_changed,objcopy) + $(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE)) + @echo ' Barebox: $@ is ready' + +$(obj)/zbarebox.S: $(obj)/zbarebox FORCE + $(call if_changed,disasm) + +LDFLAGS_zbarebox := -Map zbarebox.map +zbarebox-common := $(barebox-pbl-common) +zbarebox-lds := $(obj)/zbarebox.lds + +quiet_cmd_zbarebox__ ?= LD $@ + cmd_zbarebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_zbarebox) -o $@ \ + -T $(zbarebox-lds) \ + --start-group $(zbarebox-common) --end-group \ + $(filter-out $(zbarebox-lds) $(zbarebox-common) FORCE ,$^) + +$(obj)/zbarebox: $(zbarebox-lds) $(zbarebox-common) FORCE + $(call if_changed,zbarebox__) diff --git a/arch/arm/pbl/zbarebox.lds.S b/arch/arm/pbl/zbarebox.lds.S new file mode 100644 index 0000000000..b6e8028fd3 --- /dev/null +++ b/arch/arm/pbl/zbarebox.lds.S @@ -0,0 +1,73 @@ +/* + * (C) Copyright 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + +#include <asm-generic/barebox.lds.h> +#include <asm-generic/memory_layout.h> + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(pbl_start) +SECTIONS +{ + . = HEAD_TEXT_BASE; + + PRE_IMAGE + + . = ALIGN(4); + .text : + { + _stext = .; + _text = .; + *(.text_head_entry*) + __ll_return = .; + *(.text_ll_return*) + __bare_init_start = .; + *(.text_bare_init*) + __bare_init_end = .; + *(.text*) + } + BAREBOX_BARE_INIT_SIZE + + . = ALIGN(4); + .rodata : { *(.rodata*) } + + _etext = .; /* End of text and rodata section */ + + . = ALIGN(4); + .data : { *(.data*) } + + . = ALIGN(4); + __bss_start = .; + .bss : { *(.bss*) } + __bss_stop = .; + _end = .; + + . = ALIGN(4); + __piggydata_start = .; + .piggydata : { + *(.piggydata) + } + __piggydata_end = .; + + _barebox_image_size = __piggydata_end - HEAD_TEXT_BASE; +} |