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>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD
parent
d4c42fb33d
commit
78867e2bbd
6
Makefile
6
Makefile
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@ -474,6 +474,8 @@ CFLAGS += $(call cc-option,-Wno-pointer-sign,)
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# this default value
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export KBUILD_IMAGE ?= barebox
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common-$(CONFIG_PBL_IMAGE) += pbl/
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barebox-dirs := $(patsubst %/,%,$(filter %/, $(common-y)))
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barebox-alldirs := $(sort $(barebox-dirs) $(patsubst %/,%,$(filter %/, \
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@ -520,7 +522,7 @@ barebox-lds := $(lds-y)
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# May be overridden by arch/$(ARCH)/Makefile
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quiet_cmd_barebox__ ?= LD $@
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cmd_barebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_barebox) -o $@ \
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-T $(barebox-lds) $(barebox-head) \
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-T $(barebox-lds) \
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--start-group $(barebox-common) --end-group \
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$(filter-out $(barebox-lds) $(barebox-common) FORCE ,$^)
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@ -674,7 +676,9 @@ OBJCOPYFLAGS_barebox.bin = -O binary
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barebox.bin: barebox FORCE
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$(call if_changed,objcopy)
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ifndef CONFIG_PBL_IMAGE
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$(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE))
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endif
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ifdef CONFIG_X86
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barebox.S: barebox
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@ -4,6 +4,7 @@ config ARM
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select HAS_MODULES
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select HAVE_CONFIGURABLE_MEMORY_LAYOUT
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select HAVE_CONFIGURABLE_TEXT_BASE
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select HAVE_PBL_IMAGE
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default y
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config ARM_AMBA
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@ -197,6 +197,13 @@ ifeq ($(CONFIG_ARCH_DAVINCI),y)
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KBUILD_IMAGE := barebox.ubl
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endif
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pbl := arch/arm/pbl
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zbarebox.S zbarebox.bin zbarebox: barebox.bin
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$(Q)$(MAKE) $(build)=$(pbl) $(pbl)/$@
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archclean:
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$(MAKE) $(clean)=$(pbl)
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all: $(KBUILD_IMAGE)
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archprepare: maketools
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@ -1,7 +1,7 @@
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obj-y += cpu.o
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obj-$(CONFIG_ARM_EXCEPTIONS) += exceptions.o
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obj-$(CONFIG_ARM_EXCEPTIONS) += interrupts.o
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obj-y += start.o
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obj-y += start.o start-reset.o
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#
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# Any variants can be called as start-armxyz.S
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@ -15,3 +15,4 @@ obj-$(CONFIG_CPU_32v6) += cache-armv6.o
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obj-$(CONFIG_CPU_32v7) += cache-armv7.o
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obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o
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pbl-y += start-pbl.o start-reset.o
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@ -0,0 +1,80 @@
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/*
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* start-pbl.c
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*
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* Copyright (c) 2010-2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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* Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <init.h>
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#include <asm/barebox-arm.h>
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#include <asm/barebox-arm-head.h>
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#include <asm-generic/memory_layout.h>
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#include <asm/sections.h>
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void __naked __section(.text_head_entry) pbl_start(void)
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{
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barebox_arm_head();
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}
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void barebox_pbl(uint32_t offset)
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{
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}
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/*
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* Board code can jump here by either returning from board_init_lowlevel
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* or by calling this function directly.
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*/
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void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
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{
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uint32_t r, addr, offset;
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/*
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* Get runtime address of this function. Do not
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* put any code above this.
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*/
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__asm__ __volatile__("1: adr %0, 1b":"=r"(addr));
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/* Setup the stack */
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r = STACK_BASE + STACK_SIZE - 16;
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__asm__ __volatile__("mov sp, %0" : : "r"(r));
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/* Get offset between linked address and runtime address */
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offset = (uint32_t)__ll_return - addr;
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/* relocate to link address if necessary */
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if (offset)
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memcpy((void *)_text, (void *)(_text - offset),
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__bss_start - _text);
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/* clear bss */
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memset(__bss_start, 0, __bss_stop - __bss_start);
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/* flush I-cache before jumping to the copied binary */
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__asm__ __volatile__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0));
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r = (unsigned int)&barebox_pbl;
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/* call barebox_uncompress with its absolute address */
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__asm__ __volatile__(
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"mov r0, %1\n"
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"mov pc, %0\n"
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:
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: "r"(r), "r"(offset),
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: "r0");
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}
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@ -0,0 +1,67 @@
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/*
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* start-reset.c
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*
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* Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <init.h>
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#include <asm/system.h>
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#include <asm/barebox-arm.h>
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#include <asm/sections.h>
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/*
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* The actual reset vector. This code is position independent and usually
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* does not run at the address it's linked at.
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*/
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void __naked __bare_init reset(void)
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{
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uint32_t r;
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/* set the cpu to SVC32 mode */
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__asm__ __volatile__("mrs %0, cpsr":"=r"(r));
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r &= ~0x1f;
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r |= 0xd3;
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__asm__ __volatile__("msr cpsr, %0" : : "r"(r));
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#ifdef CONFIG_ARCH_HAS_LOWLEVEL_INIT
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arch_init_lowlevel();
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#endif
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/* disable MMU stuff and caches */
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r = get_cr();
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r &= ~(CR_M | CR_C | CR_B | CR_S | CR_R | CR_V);
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r |= CR_I;
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#if __LINUX_ARM_ARCH__ >= 6
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r |= CR_U;
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#else
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r |= CR_A;
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#endif
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#ifdef __ARMEB__
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r |= CR_B;
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#endif
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set_cr(r);
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#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
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board_init_lowlevel();
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#endif
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board_init_lowlevel_return();
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}
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@ -24,55 +24,33 @@
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#include <init.h>
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#include <asm/barebox-arm.h>
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#include <asm/barebox-arm-head.h>
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#include <asm/system.h>
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#include <asm-generic/memory_layout.h>
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#include <asm/sections.h>
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#ifdef CONFIG_PBL_IMAGE
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/*
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* First function in the pbl image. We get here from
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* the pbl.
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*/
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void __naked __section(.text_entry) start(void)
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{
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u32 r;
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/* Setup the stack */
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r = STACK_BASE + STACK_SIZE - 16;
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__asm__ __volatile__("mov sp, %0" : : "r"(r));
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/* clear bss */
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memset(__bss_start, 0, __bss_stop - __bss_start);
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start_barebox();
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}
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#else
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void __naked __section(.text_entry) start(void)
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{
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barebox_arm_head();
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}
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/*
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* The actual reset vector. This code is position independent and usually
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* does not run at the address it's linked at.
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*/
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void __naked __bare_init reset(void)
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{
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uint32_t r;
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/* set the cpu to SVC32 mode */
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__asm__ __volatile__("mrs %0, cpsr":"=r"(r));
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r &= ~0x1f;
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r |= 0xd3;
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__asm__ __volatile__("msr cpsr, %0" : : "r"(r));
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#ifdef CONFIG_ARCH_HAS_LOWLEVEL_INIT
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arch_init_lowlevel();
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#endif
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/* disable MMU stuff and caches */
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r = get_cr();
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r &= ~(CR_M | CR_C | CR_B | CR_S | CR_R | CR_V);
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r |= CR_I;
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#if __LINUX_ARM_ARCH__ >= 6
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r |= CR_U;
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#else
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r |= CR_A;
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#endif
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#ifdef __ARMEB__
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r |= CR_B;
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#endif
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set_cr(r);
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#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
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board_init_lowlevel();
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#endif
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board_init_lowlevel_return();
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}
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/*
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* Board code can jump here by either returning from board_init_lowlevel
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* or by calling this function directly.
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@ -109,4 +87,4 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
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r = (unsigned int)&start_barebox;
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__asm__ __volatile__("mov pc, %0" : : "r"(r));
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}
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#endif
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@ -21,3 +21,7 @@ obj-$(CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS) += memset.o
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obj-$(CONFIG_ARM_UNWIND) += unwind.o
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obj-$(CONFIG_MODULES) += module.o
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extra-y += barebox.lds
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pbl-y += lib1funcs.o
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pbl-y += ashldi3.o
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pbl-y += div0.o
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@ -31,8 +31,9 @@ SECTIONS
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{
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. = TEXT_BASE;
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#ifndef CONFIG_PBL_IMAGE
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PRE_IMAGE
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#endif
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. = ALIGN(4);
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.text :
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{
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@ -0,0 +1,25 @@
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OBJCOPYFLAGS_zbarebox.bin = -O binary
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targets := zbarebox.lds zbarebox zbarebox.bin zbarebox.S
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$(obj)/zbarebox.bin: $(obj)/zbarebox FORCE
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$(call if_changed,objcopy)
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$(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE))
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@echo ' Barebox: $@ is ready'
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$(obj)/zbarebox.S: $(obj)/zbarebox FORCE
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$(call if_changed,disasm)
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LDFLAGS_zbarebox := -Map zbarebox.map
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zbarebox-common := $(barebox-pbl-common)
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zbarebox-lds := $(obj)/zbarebox.lds
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quiet_cmd_zbarebox__ ?= LD $@
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cmd_zbarebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_zbarebox) -o $@ \
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-T $(zbarebox-lds) \
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--start-group $(zbarebox-common) --end-group \
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$(filter-out $(zbarebox-lds) $(zbarebox-common) FORCE ,$^)
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$(obj)/zbarebox: $(zbarebox-lds) $(zbarebox-common) FORCE
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$(call if_changed,zbarebox__)
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@ -0,0 +1,73 @@
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/*
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* (C) Copyright 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
|
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*
|
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* You should have received a copy of the GNU General Public License
|
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* along with this program; if not, write to the Free Software
|
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include <asm-generic/barebox.lds.h>
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#include <asm-generic/memory_layout.h>
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OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
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OUTPUT_ARCH(arm)
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ENTRY(pbl_start)
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SECTIONS
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{
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. = HEAD_TEXT_BASE;
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PRE_IMAGE
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. = ALIGN(4);
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.text :
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{
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_stext = .;
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_text = .;
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*(.text_head_entry*)
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__ll_return = .;
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*(.text_ll_return*)
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__bare_init_start = .;
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*(.text_bare_init*)
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__bare_init_end = .;
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*(.text*)
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}
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BAREBOX_BARE_INIT_SIZE
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. = ALIGN(4);
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.rodata : { *(.rodata*) }
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_etext = .; /* End of text and rodata section */
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. = ALIGN(4);
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.data : { *(.data*) }
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. = ALIGN(4);
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__bss_start = .;
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.bss : { *(.bss*) }
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__bss_stop = .;
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_end = .;
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. = ALIGN(4);
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__piggydata_start = .;
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.piggydata : {
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*(.piggydata)
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}
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__piggydata_end = .;
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_barebox_image_size = __piggydata_end - HEAD_TEXT_BASE;
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}
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@ -101,6 +101,36 @@ config ENVIRONMENT_VARIABLES
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menu "memory layout "
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config HAVE_PBL_IMAGE
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bool
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config HAVE_IMAGE_COMPRESSION
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bool
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config PBL_IMAGE
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bool "Pre-Bootloader image"
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depends on HAVE_PBL_IMAGE
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if PBL_IMAGE
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config IMAGE_COMPRESSION
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bool "Compressed image"
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depends on HAVE_IMAGE_COMPRESSION
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if IMAGE_COMPRESSION
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choice
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prompt "Compression"
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config IMAGE_COMPRESSION_LZO
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bool "lzo"
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endchoice
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endif
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endif
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config MMU
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bool "Enable MMU"
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help
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@ -13,6 +13,7 @@
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#endif
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#define HEAD_TEXT_BASE MALLOC_BASE
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#define MALLOC_SIZE CONFIG_MALLOC_SIZE
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#define STACK_SIZE CONFIG_STACK_SIZE
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|
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@ -0,0 +1,5 @@
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#
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# only unsed by the pbl
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#
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pbl-y += misc.o
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pbl-y += string.o
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|
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@ -0,0 +1,14 @@
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#include <common.h>
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#include <init.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
|
||||
|
||||
void __noreturn panic(const char *fmt, ...)
|
||||
{
|
||||
while(1);
|
||||
}
|
||||
|
||||
void start_barebox(void)
|
||||
{
|
||||
}
|
||||
|
|
@ -0,0 +1,127 @@
|
|||
/*
|
||||
* arch/arm/boot/compressed/string.c
|
||||
*
|
||||
* Small subset of simple string routines
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
void *memcpy(void *__dest, __const void *__src, size_t __n)
|
||||
{
|
||||
int i = 0;
|
||||
unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
|
||||
|
||||
for (i = __n >> 3; i > 0; i--) {
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
}
|
||||
|
||||
if (__n & 1 << 2) {
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
}
|
||||
|
||||
if (__n & 1 << 1) {
|
||||
*d++ = *s++;
|
||||
*d++ = *s++;
|
||||
}
|
||||
|
||||
if (__n & 1)
|
||||
*d++ = *s++;
|
||||
|
||||
return __dest;
|
||||
}
|
||||
|
||||
void *memmove(void *__dest, __const void *__src, size_t count)
|
||||
{
|
||||
unsigned char *d = __dest;
|
||||
const unsigned char *s = __src;
|
||||
|
||||
if (__dest == __src)
|
||||
return __dest;
|
||||
|
||||
if (__dest < __src)
|
||||
return memcpy(__dest, __src, count);
|
||||
|
||||
while (count--)
|
||||
d[count] = s[count];
|
||||
return __dest;
|
||||
}
|
||||
|
||||
size_t strlen(const char *s)
|
||||
{
|
||||
const char *sc = s;
|
||||
|
||||
while (*sc != '\0')
|
||||
sc++;
|
||||
return sc - s;
|
||||
}
|
||||
|
||||
int memcmp(const void *cs, const void *ct, size_t count)
|
||||
{
|
||||
const unsigned char *su1 = cs, *su2 = ct, *end = su1 + count;
|
||||
int res = 0;
|
||||
|
||||
while (su1 < end) {
|
||||
res = *su1++ - *su2++;
|
||||
if (res)
|
||||
break;
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
int strcmp(const char *cs, const char *ct)
|
||||
{
|
||||
unsigned char c1, c2;
|
||||
int res = 0;
|
||||
|
||||
do {
|
||||
c1 = *cs++;
|
||||
c2 = *ct++;
|
||||
res = c1 - c2;
|
||||
if (res)
|
||||
break;
|
||||
} while (c1);
|
||||
return res;
|
||||
}
|
||||
|
||||
void *memchr(const void *s, int c, size_t count)
|
||||
{
|
||||
const unsigned char *p = s;
|
||||
|
||||
while (count--)
|
||||
if ((unsigned char)c == *p++)
|
||||
return (void *)(p - 1);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
char *strchr(const char *s, int c)
|
||||
{
|
||||
while (*s != (char)c)
|
||||
if (*s++ == '\0')
|
||||
return NULL;
|
||||
return (char *)s;
|
||||
}
|
||||
|
||||
#undef memset
|
||||
|
||||
void *memset(void *s, int c, size_t count)
|
||||
{
|
||||
char *xs = s;
|
||||
while (count--)
|
||||
*xs++ = c;
|
||||
return s;
|
||||
}
|
||||
|
||||
void __memzero(void *s, size_t count)
|
||||
{
|
||||
memset(s, 0, count);
|
||||
}
|
||||
Loading…
Reference in New Issue