UBOOT引导内核uImage问题

【转】UBOOT引导内核uImage问题

UBOOT引导内核uImage问题

现象：

[u-boot@MINI2440]# boot

dm9000 i/o: 0x20000300, id: 0x90000a46

DM9000: running in 16 bit mode

MAC: 08:08:11:18:12:27

operating at 100M full duplex mode

Using dm9000 device

TFTP from server 192.168.1.62; our IP address is 192.168.1.144

Filename 'uImage'.

Load address: 0x30008000

Loading: T #################################################################

#################################################################

##########################################

done

Bytes transferred = 2517092 (266864 hex)

## Booting kernel from Legacy Image at 30008000 ...

Image Name: Linux-2.6.32.2-FriendlyARM

Created: 2010-07-19 11:41:56 UTC

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 2517028 Bytes = 2.4 MB

Load Address: 30008000

Entry Point: 30008000

Verifying Checksum ... OK

XIP Kernel Image ... OK

OK

Starting kernel ...

data abort

pc : [<30008008>] lr : [<33fa6500>]

sp : 33f3dd24 ip : 00000000 fp : 30008000

r10: 33fc2f08 r9 : 000007cf r8 : 33f3ffe0

r7 : 33f3ffc4 r6 : 33f4131a r5 : 30000100 r4 : 00000000

r3 : 00000000 r2 : 30000100 r1 : 000007cf r0 : 00000000

Flags: nzCv IRQs off FIQs off Mode SVC_32

Resetting CPU ...

resetting ...

分析：

uImage的制作办法是make uImage, 其中的mkimage: /usr/local/bin/mkimage工具来自UBOOT编译结果。

原来为了便于多内核引导，u-boot的mkimage会在kernel前加上0x40（64bytes）的头，真正的内核入口就变成了0x30008040了。而在新版2.6.32的加载地址和入口点地址相同，所以就造成abort……

解决办法

1. 手动制作uImage:

./mkimage -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008040 -n mini2440 -d zImage uImage

2.修改内核

linux-2.6.32.2/arch/arm/boot/Makefile

MKIMAGE := $(srctree)/scripts/mkuboot.sh

quiet_cmd_uimage = UIMAGE $@

cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A arm -O linux -T kernel \

-C none -a $(LOADADDR) -e $(STARTADDR) \

-n 'Linux-$(KERNELRELEASE)' -d $< $@

ifeq ($(CONFIG_ZBOOT_ROM),y)

$(obj)/uImage: LOADADDR=$(CONFIG_ZBOOT_ROM_TEXT)

else

$(obj)/uImage: LOADADDR=$(ZRELADDR)

endif

# Note: the following conditions must always be true:

# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)

# PARAMS_PHYS must be within 4MB of ZRELADDR

# INITRD_PHYS must be in RAM

ZRELADDR := $(zreladdr-y)

PARAMS_PHYS := $(params_phys-y)

INITRD_PHYS := $(initrd_phys-y)

ifeq ($(CONFIG_THUMB2_KERNEL),y)

# Set bit 0 to 1 so that "mov pc, rx" switches to Thumb-2 mode

$(obj)/uImage: STARTADDR=$(shell echo $(LOADADDR) | sed -e "s/.$$/1/")

else

$(obj)/uImage: STARTADDR=$(LOADADDR)

endif