接下来分析一下韦老师的uboot补丁:
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--- u-boot-1.1.6/board/100ask24x0/100ask24x0.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/100ask24x0.c 2010-11-26 12:54:37.034090906 +0800
...
增加100ask24x0/100ask24x0.c文件
里面有
DECLARE_GLOBAL_DATA_PTR;
int board_init (void){...}
int dram_init (void){...}
ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info){...}
理论上照搬自smdk2410板子的同一类型文件.
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diff -urN u-boot-1.1.6/board/100ask24x0/boot_init.c u-boot-1.1.6_jz2440/board/100ask24x0/boot_init.c
--- u-boot-1.1.6/board/100ask24x0/boot_init.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/boot_init.c 2010-11-26 12:54:37.042080086 +0800
增加boot_init.c
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照搬smdk2410上面的config.mk
diff -urN u-boot-1.1.6/board/100ask24x0/config.mk u-boot-1.1.6_jz2440/board/100ask24x0/config.mk
--- u-boot-1.1.6/board/100ask24x0/config.mk 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/config.mk 2010-11-26 12:54:37.022042833 +0800
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diff -urN u-boot-1.1.6/board/100ask24x0/flash.c u-boot-1.1.6_jz2440/board/100ask24x0/flash.c
--- u-boot-1.1.6/board/100ask24x0/flash.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/flash.c 2010-11-26 12:54:37.022042833 +0800
这个是nand_flash的驱动
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diff -urN u-boot-1.1.6/board/100ask24x0/lowlevel_init.S u-boot-1.1.6_jz2440/board/100ask24x0/lowlevel_init.S
--- u-boot-1.1.6/board/100ask24x0/lowlevel_init.S 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/lowlevel_init.S 2010-11-26 12:54:37.042080086 +0800
启动初始化的汇编, 也就是确定sdram, nand_flash的内存地址映射, 前面也说过这个文件也是要检查的.
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diff -urN u-boot-1.1.6/board/100ask24x0/Makefile u-boot-1.1.6_jz2440/board/100ask24x0/Makefile
--- u-boot-1.1.6/board/100ask24x0/Makefile 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/Makefile 2010-11-26 12:54:37.030096240 +0800
Makefile文件也是来自smdk2410的, 改了一下要编译的目标文件名
+COBJS := 100ask24x0.o boot_init.o
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diff -urN u-boot-1.1.6/board/100ask24x0/u-boot.lds u-boot-1.1.6_jz2440/board/100ask24x0/u-boot.lds
--- u-boot-1.1.6/board/100ask24x0/u-boot.lds 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/board/100ask24x0/u-boot.lds 2010-11-26 12:54:37.042080086 +0800
链接脚本文件也是照抄, 并无更改.
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diff -urN u-boot-1.1.6/board/MAI/bios_emulator/scitech/src/v86bios/lex.l u-boot-1.1.6_jz2440/board/MAI/bios_emulator/scitech/src/v86bios/lex.l
--- u-boot-1.1.6/board/MAI/bios_emulator/scitech/src/v86bios/lex.l 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/board/MAI/bios_emulator/scitech/src/v86bios/lex.l 1970-01-01 07:00:00.000000000 +0700
之前没涉及这个, 貌似是基本把这个文件给清空了.
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diff -urN u-boot-1.1.6/common/cmd_bootm.c u-boot-1.1.6_jz2440/common/cmd_bootm.c
--- u-boot-1.1.6/common/cmd_bootm.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/common/cmd_bootm.c 2010-11-26 12:54:38.150155640 +0800
diff -urN u-boot-1.1.6/common/cmd_load.c u-boot-1.1.6_jz2440/common/cmd_load.c
--- u-boot-1.1.6/common/cmd_load.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/common/cmd_load.c 2010-11-26 12:54:38.142063808 +0800
diff -urN u-boot-1.1.6/common/cmd_menu.c u-boot-1.1.6_jz2440/common/cmd_menu.c
--- u-boot-1.1.6/common/cmd_menu.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/common/cmd_menu.c 2010-11-26 12:54:38.158053077 +0800
启动命令, 菜单一类吧
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diff -urN u-boot-1.1.6/common/cmd_nand_legacy.c u-boot-1.1.6_jz2440/common/cmd_nand_legacy.c
--- u-boot-1.1.6/common/cmd_nand_legacy.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/common/cmd_nand_legacy.c 2010-11-26 12:54:38.130318758 +0800
diff -urN u-boot-1.1.6/common/env_nand.c u-boot-1.1.6_jz2440/common/env_nand.c
--- u-boot-1.1.6/common/env_nand.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/common/env_nand.c 2010-11-26 12:54:38.170264643 +0800
这个才是nand支持.
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diff -urN u-boot-1.1.6/cpu/arm920t/s3c24x0/interrupts.c u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/interrupts.c
--- u-boot-1.1.6/cpu/arm920t/s3c24x0/interrupts.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/interrupts.c 2010-11-26 12:54:37.726297356 +0800
中断定义, 增加
diff -urN u-boot-1.1.6/cpu/arm920t/s3c24x0/Makefile u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/Makefile
--- u-boot-1.1.6/cpu/arm920t/s3c24x0/Makefile 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/Makefile 2010-11-26 12:54:37.726297356 +0800
diff -urN u-boot-1.1.6/cpu/arm920t/s3c24x0/nand_flash.c u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/nand_flash.c
--- u-boot-1.1.6/cpu/arm920t/s3c24x0/nand_flash.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/nand_flash.c 2010-11-26 12:54:37.726297356 +0800
diff -urN u-boot-1.1.6/cpu/arm920t/s3c24x0/nand_flash_legacy.c u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/nand_flash_legacy.c
--- u-boot-1.1.6/cpu/arm920t/s3c24x0/nand_flash_legacy.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/nand_flash_legacy.c 2010-11-26 12:54:37.726297356 +0800
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diff -urN u-boot-1.1.6/cpu/arm920t/s3c24x0/speed.c u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/speed.c
--- u-boot-1.1.6/cpu/arm920t/s3c24x0/speed.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/speed.c 2010-11-26 12:54:37.730289845 +0800
diff -urN u-boot-1.1.6/cpu/arm920t/start.S u-boot-1.1.6_jz2440/cpu/arm920t/start.S
--- u-boot-1.1.6/cpu/arm920t/start.S 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/cpu/arm920t/start.S 2010-11-26 12:54:37.718042180 +0800
这个跟之前的是一样的.
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diff -urN u-boot-1.1.6/drivers/dm9000x.c u-boot-1.1.6_jz2440/drivers/dm9000x.c
--- u-boot-1.1.6/drivers/dm9000x.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/drivers/dm9000x.c 2010-11-26 12:54:38.306059089 +0800
增加网络的支持
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diff -urN u-boot-1.1.6/drivers/jedec_flash.c u-boot-1.1.6_jz2440/drivers/jedec_flash.c
--- u-boot-1.1.6/drivers/jedec_flash.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/drivers/jedec_flash.c 2010-11-26 12:54:38.462156280 +0800
支持jedec的专用flash驱动
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diff -urN u-boot-1.1.6/drivers/Makefile u-boot-1.1.6_jz2440/drivers/Makefile
--- u-boot-1.1.6/drivers/Makefile 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/drivers/Makefile 2010-11-26 12:54:38.422209313 +0800
增加了驱动, 要修改Makefile, 让其编译
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diff -urN u-boot-1.1.6/drivers/nand/nand_base.c u-boot-1.1.6_jz2440/drivers/nand/nand_base.c
--- u-boot-1.1.6/drivers/nand/nand_base.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/drivers/nand/nand_base.c 2010-11-26 12:54:38.406038793 +0800
diff -urN u-boot-1.1.6/drivers/nand/nand_util.c u-boot-1.1.6_jz2440/drivers/nand/nand_util.c
--- u-boot-1.1.6/drivers/nand/nand_util.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/drivers/nand/nand_util.c 2010-11-26 12:54:38.402251606 +0800
diff -urN u-boot-1.1.6/drivers/nand_legacy/nand_legacy.c u-boot-1.1.6_jz2440/drivers/nand_legacy/nand_legacy.c
--- u-boot-1.1.6/drivers/nand_legacy/nand_legacy.c 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/drivers/nand_legacy/nand_legacy.c 2010-11-26 12:54:38.414220270 +0800
放在驱动文件夹下面, 应该是驱动
diff -urN u-boot-1.1.6/drivers/usb/2440usb.h u-boot-1.1.6_jz2440/drivers/usb/2440usb.h
--- u-boot-1.1.6/drivers/usb/2440usb.h 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/drivers/usb/2440usb.h 2010-11-26 12:54:38.322059054 +0800
usb驱动
diff -urN u-boot-1.1.6/drivers/usb/Makefile u-boot-1.1.6_jz2440/drivers/usb/Makefile
--- u-boot-1.1.6/drivers/usb/Makefile 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/drivers/usb/Makefile 2010-11-26 12:54:38.326057824 +0800
usb驱动编译
支持usb是为了从usb下载文件系统??
diff -urN u-boot-1.1.6/drivers/usb/usb.h u-boot-1.1.6_jz2440/drivers/usb/usb.h
--- u-boot-1.1.6/drivers/usb/usb.h 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/drivers/usb/usb.h 2010-11-26 12:54:38.330048254 +0800
diff -urN u-boot-1.1.6/drivers/usb/usbin.c u-boot-1.1.6_jz2440/drivers/usb/usbin.c
--- u-boot-1.1.6/drivers/usb/usbin.c 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/drivers/usb/usbin.c 2010-11-26 12:54:38.326057824 +0800
diff -urN u-boot-1.1.6/drivers/usb/usbinit.h u-boot-1.1.6_jz2440/drivers/usb/usbinit.h
--- u-boot-1.1.6/drivers/usb/usbinit.h 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/drivers/usb/usbinit.h 2010-11-26 12:54:38.330048254 +0800
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diff -urN u-boot-1.1.6/include/asm-arm/mach-types.h u-boot-1.1.6_jz2440/include/asm-arm/mach-types.h
--- u-boot-1.1.6/include/asm-arm/mach-types.h 2006-11-02 22:15:01.000000000 +0800
+++ u-boot-1.1.6_jz2440/include/asm-arm/mach-types.h 2010-11-26 12:54:38.046150949 +0800
@@ -737,6 +737,7 @@
#define MACH_TYPE_CB3RUFC 726
#define MACH_TYPE_MP2USB 727
#define MACH_TYPE_PDNB3 1002
+#define MACH_TYPE_SMDKS3C2440 782
#ifdef CONFIG_ARCH_EBSA110
# ifdef machine_arch_type
增加机器码, 这个估计后面linux内核启动用得着.
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diff -urN u-boot-1.1.6/include/configs/100ask24x0.h u-boot-1.1.6_jz2440/include/configs/100ask24x0.h
--- u-boot-1.1.6/include/configs/100ask24x0.h 1970-01-01 07:00:00.000000000 +0700
+++ u-boot-1.1.6_jz2440/include/configs/100ask24x0.h 2010-11-26 12:54:37.958266315 +0800
这里是启动时候的环境变量
整体来说, 增加了网络, nandflash支持, usb的驱动, 以及菜单的制作.