一、【s3c2440移植u-boot-2016-11】拷贝代码并在NOR Flash上启动u-boot

其他 2018-06-20 18:47:11 阅读次数: 3

（一）拷贝模板

1、拷贝board/samsung/smdk2410为board/samsung/smdk2440

book@ubuntu:~$ cd u-boot-2016.11/board/samsung/
book@ubuntu:~/u-boot-2016.11/board/samsung$ ls
arndale espresso7420 odroid smdk2410 smdk5420 smdkv310 trats2
common goni origen smdk5250 smdkc100 trats universal_c210
book@ubuntu:~/u-boot-2016.11/board/samsung$ cp -R smdk2410 smdk2440
book@ubuntu:~/u-boot-2016.11/board/samsung$ cd smdk2440
book@ubuntu:~/u-boot-2016.11/board/samsung/smdk2440$ ls
Kconfig lowlevel_init.S MAINTAINERS Makefile smdk2410.c
book@ubuntu:~/u-boot-2016.11/board/samsung/smdk2440$ mv smdk2410.c smdk2440.c
book@ubuntu:~/u-boot-2016.11/board/samsung/smdk2440$ ls
Kconfig lowlevel_init.S MAINTAINERS Makefile smdk2440.c

2、拷贝configs/smdk2410_defconfig为configs/smdk2440_defconfig

book@ubuntu:~/u-boot-2016.11/board/samsung/smdk2440$ cd ~/u-boot-2016.11/configs
book@ubuntu:~/u-boot-2016.11/configs$ cp smdk2410_defconfig smdk2440_defconfig

3、拷贝include/configs/smdk2410.h为include/configs/smdk2440.h

book@ubuntu:~/u-boot-2016.11/configs$ cd ../include/configs/
book@ubuntu:~/u-boot-2016.11/include/configs$ cp smdk2410.h smdk2440.h

（二）初步编译u-boot

1、修改arch/arm/Kconfig

diff -urN u-boot-2016.11/arch/arm/Kconfig u-boot-2016.11_s3c2440/arch/arm/Kconfig
--- u-boot-2016.11/arch/arm/Kconfig 2016-11-15 00:27:11.000000000 +0800
+++ u-boot-2016.11_s3c2440/arch/arm/Kconfig 2018-06-14 19:59:43.532651155 +0800
@@ -145,6 +145,10 @@
    bool "Support smdk2410"
    select CPU_ARM920T

+config TARGET_SMDK2440
+   bool "Support smdk2440"
+   select CPU_ARM920T
+
 config TARGET_ASPENITE
    bool "Support aspenite"
    select CPU_ARM926EJS
@@ -992,6 +996,7 @@
 source "board/phytec/pcm052/Kconfig"
 source "board/ppcag/bg0900/Kconfig"
 source "board/samsung/smdk2410/Kconfig"
+source "board/samsung/smdk2440/Kconfig"
 source "board/sandisk/sansa_fuze_plus/Kconfig"
 source "board/schulercontrol/sc_sps_1/Kconfig"
 source "board/siemens/draco/Kconfig"

2、修改board/samsung/smdk2440/Kconfig

diff -urN u-boot-2016.11/board/samsung/smdk2440/Kconfig u-boot-2016.11_s3c2440/board/samsung/smdk2440/Kconfig
--- u-boot-2016.11/board/samsung/smdk2440/Kconfig   2018-06-14 22:06:34.243660155 +0800
+++ u-boot-2016.11_s3c2440/board/samsung/smdk2440/Kconfig   2018-06-14 20:00:28.647197155 +0800
@@ -1,7 +1,7 @@
-if TARGET_SMDK2410
+if TARGET_SMDK2440

 config SYS_BOARD
-   default "smdk2410"
+   default "smdk2440"

 config SYS_VENDOR
    default "samsung"
@@ -10,6 +10,6 @@
    default "s3c24x0"

 config SYS_CONFIG_NAME
-   default "smdk2410"
+   default "smdk2440"

 endif

3、修改board/samsung/smdk2440/MAINTAINERS

diff -urN u-boot-2016.11/board/samsung/smdk2440/MAINTAINERS u-boot-2016.11_s3c2440/board/samsung/smdk2440/MAINTAINERS
--- u-boot-2016.11/board/samsung/smdk2440/MAINTAINERS   2018-06-14 22:06:34.243660155 +0800
+++ u-boot-2016.11_s3c2440/board/samsung/smdk2440/MAINTAINERS   2018-06-14 20:00:57.529631155 +0800
@@ -1,6 +1,6 @@
-SMDK2410 BOARD
+SMDK2440 BOARD
 M: David Müller <[email protected]>
 S: Maintained
-F: board/samsung/smdk2410/
-F: include/configs/smdk2410.h
-F: configs/smdk2410_defconfig
+F: board/samsung/smdk2440/
+F: include/configs/smdk2440.h
+F: configs/smdk2440_defconfig

4、修改board/samsung/smdk2440/Makefile

diff -urN u-boot-2016.11/board/samsung/smdk2440/Makefile u-boot-2016.11_s3c2440/board/samsung/smdk2440/Makefile
--- u-boot-2016.11/board/samsung/smdk2440/Makefile  2018-06-14 22:06:34.243660155 +0800
+++ u-boot-2016.11_s3c2440/board/samsung/smdk2440/Makefile  2018-06-14 20:01:27.408563155 +0800
@@ -5,5 +5,5 @@
 # SPDX-License-Identifier: GPL-2.0+
 #

-obj-y  := smdk2410.o
+obj-y  := smdk2440.o
 obj-y  += lowlevel_init.o

5、修改configs/smdk2440_defconfig

diff -urN u-boot-2016.11/configs/smdk2440_defconfig u-boot-2016.11_s3c2440/configs/smdk2440_defconfig
--- u-boot-2016.11/configs/smdk2440_defconfig   2018-06-14 22:06:53.467660155 +0800
+++ u-boot-2016.11_s3c2440/configs/smdk2440_defconfig   2018-06-14 20:11:33.999707154 +0800
@@ -1,10 +1,10 @@
 CONFIG_ARM=y
-CONFIG_TARGET_SMDK2410=y
+CONFIG_TARGET_SMDK2440=y
 CONFIG_BOOTDELAY=5
 # CONFIG_SYS_STDIO_DEREGISTER is not set
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_HUSH_PARSER=y
-CONFIG_SYS_PROMPT="SMDK2410 # "
+CONFIG_SYS_PROMPT="SMDK2440 # "
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y

6、修改scripts/config_whitelist.txt

diff -urN u-boot-2016.11/scripts/config_whitelist.txt u-boot-2016.11_s3c2440/scripts/config_whitelist.txt
--- u-boot-2016.11/scripts/config_whitelist.txt 2016-11-15 00:27:11.000000000 +0800
+++ u-boot-2016.11_s3c2440/scripts/config_whitelist.txt 2018-06-14 20:21:40.162637155 +0800
@@ -4107,6 +4107,7 @@
 CONFIG_SMC_USE_32_BIT
 CONFIG_SMC_USE_IOFUNCS
 CONFIG_SMDK2410
+CONFIG_SMDK2440
 CONFIG_SMDK5420
 CONFIG_SMDKC100
 CONFIG_SMDKV310

7、修改include/configs/smdk2440.h

diff -urN u-boot-2016.11/include/configs/smdk2440.h u-boot-2016.11_s3c2440/include/configs/smdk2440.h
--- u-boot-2016.11/include/configs/smdk2440.h   2018-06-14 22:07:11.595660155 +0800
+++ u-boot-2016.11_s3c2440/include/configs/smdk2440.h   2018-06-14 20:13:47.670509156 +0800
@@ -18,8 +18,8 @@
  * (easy to change)
  */
 #define CONFIG_S3C24X0     /* This is a SAMSUNG S3C24x0-type SoC */
-#define CONFIG_S3C2410     /* specifically a SAMSUNG S3C2410 SoC */
-#define CONFIG_SMDK2410        /* on a SAMSUNG SMDK2410 Board */
+#define CONFIG_S3C2440     /* specifically a SAMSUNG S3C2440 SoC */
+#define CONFIG_SMDK2440        /* on a SAMSUNG SMDK2440 Board */

 #define CONFIG_SYS_TEXT_BASE   0x0

8、增加auto_run.sh

book@ubuntu:~/u-boot-2016.11$ gedit auto_run.sh  
#!/bin/bash  

echo "Clean Configuration File..."  
make distclean  

echo "Clean Obj..."  
make clean  

echo "Load Configuration File..."  
make smdk2440_defconfig  

echo "make..."  
make CROSS_COMPILE=arm-linux-

9、编译u-boot

book@ubuntu:~/u-boot-2016.11$ chmod +x auto_run.sh  
book@ubuntu:~/u-boot-2016.11$ ./auto_run.sh 
book@ubuntu:~/u-boot-2016.11$ cd board/samsung/smdk2440/  
book@ubuntu:~/u-boot-2016.11/board/samsung/smdk2440/$ ls  
built-in.o  lowlevel_init.o  MAINTAINERS  smdk2440.c  
Kconfig     lowlevel_init.S  Makefile     smdk2440.o

10、烧写u-boot.bin到Nor Flash启动看现象

这里写图片描述
可以看到，没有任何输出信息

（三）成功在Nor Flash上启动u-boot

1、修改 arch/arm/cpu/arm920t/start.S

diff -urN u-boot-2016.11/arch/arm/cpu/arm920t/start.S u-boot-2016.11_s3c2440/arch/arm/cpu/arm920t/start.S
--- u-boot-2016.11/arch/arm/cpu/arm920t/start.S 2016-11-15 00:27:11.000000000 +0800
+++ u-boot-2016.11_s3c2440/arch/arm/cpu/arm920t/start.S 2018-06-14 22:35:54.819660155 +0800
@@ -1,7 +1,7 @@
 /*
  *  armboot - Startup Code for ARM920 CPU-core
  *
- *  Copyright (c) 2001 Marius Gröger <[email protected]>
+ *  Copyright (c) 2001 Marius Gr?ger <[email protected]>
  *  Copyright (c) 2002 Alex Züpke <[email protected]>
  *  Copyright (c) 2002 Gary Jennejohn <[email protected]>
  *
@@ -78,13 +78,37 @@
    ldr r1, =0x3ff
    ldr r0, =INTSUBMSK
    str r1, [r0]
-# endif
-
    /* FCLK:HCLK:PCLK = 1:2:4 */
    /* default FCLK is 120 MHz ! */
    ldr r0, =CLKDIVN
    mov r1, #3
    str r1, [r0]
+# endif
+# if defined(CONFIG_S3C2440)
+   #define S3C2440_MPLL_400MHZ     ((0x5c<<12)|(0x01<<4)|(0x01))
+   /* FCLK:HCLK:PCLK = 1:4:8 */
+   /* default FCLK is 400 MHz ! */
+   /* 2. 设置时钟 */
+   ldr r0, =0x4c000014
+   mov r1, #0x05;            // FCLK:HCLK:PCLK=1:4:8
+   str r1, [r0]
+
+   /* 如果HDIVN非0，CPU的总线模式应该从“fast bus mode”变为“asynchronous bus mode” */
+   mrc p15, 0, r1, c1, c0, 0       /* 读出控制寄存器 */ 
+   orr r1, r1, #0xc0000000         /* 设置为“asynchronous bus mode” */
+   mcr p15, 0, r1, c1, c0, 0       /* 写入控制寄存器 */
+
+   /* MPLLCON = S3C2440_MPLL_400MHZ */
+   ldr r0, =0x4c000004
+   ldr r1, =S3C2440_MPLL_400MHZ
+   str r1, [r0]
+
+   /* 启动ICACHE */
+   mrc p15, 0, r0, c1, c0, 0
+   orr r0, r0, #(1<<12)
+   mcr p15, 0, r0, c1, c0, 0
+# endif
+   
 #endif /* CONFIG_S3C24X0 */

    /*

2、修改board/samsung/smdk2440/lowlevel_init.S

diff -urN u-boot-2016.11/board/samsung/smdk2440/lowlevel_init.S u-boot-2016.11_s3c2440/board/samsung/smdk2440/lowlevel_init.S
--- u-boot-2016.11/board/samsung/smdk2440/lowlevel_init.S   2018-06-14 22:06:34.243660155 +0800
+++ u-boot-2016.11_s3c2440/board/samsung/smdk2440/lowlevel_init.S   2018-06-14 22:36:29.351660155 +0800
@@ -131,16 +131,17 @@
 /* the literal pools origin */

 SMRDATA:
-    .word (0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+(B4_BWSCON<<16)+(B5_BWSCON<<20)+(B6_BWSCON<<24)+(B7_BWSCON<<28))
-    .word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC))
-    .word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC))
-    .word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC))
-    .word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC))
-    .word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC))
-    .word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC))
-    .word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN))
-    .word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN))
-    .word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
-    .word 0x32
-    .word 0x30
-    .word 0x30
+   .long 0x22011110     //BWSCON
+   .long 0x00000700     //BANKCON0
+   .long 0x00000700     //BANKCON1
+   .long 0x00000700     //BANKCON2
+   .long 0x00000700     //BANKCON3  
+   .long 0x00000740     //BANKCON4
+   .long 0x00000700     //BANKCON5
+   .long 0x00018005     //BANKCON6
+   .long 0x00018005     //BANKCON7
+   .long 0x008C04F4     // REFRESH
+   .long 0x000000B1     //BANKSIZE
+   .long 0x00000030     //MRSRB6
+   .long 0x00000030     //MRSRB7
+

（四）裁剪u-boot.bin大小

1、查看未裁剪前u-boot.bin的大小

book@ubuntu:~/u-boot-2016.11$ ./auto_run.sh  
book@ubuntu:~/u-boot-2016.11$ ls -lh u-boot.bin  
-rw-rw-r-- 1 david david 520K 6月  14 23:44 u-boot.bin

u-boot.bin太大不利于烧写，我们需要对u-boot进行裁剪

2、修改arch/arm/config.mk，删除pie

diff -urN u-boot-2016.11/arch/arm/config.mk u-boot-2016.11_s3c2440/arch/arm/config.mk
--- u-boot-2016.11/arch/arm/config.mk   2016-11-15 00:27:11.000000000 +0800
+++ u-boot-2016.11_s3c2440/arch/arm/config.mk   2018-06-14 22:49:20.435660155 +0800
@@ -86,7 +86,7 @@
 endif

 # needed for relocation
-LDFLAGS_u-boot += -pie
+#LDFLAGS_u-boot += -pie

 #
 # FIXME: binutils versions < 2.22 have a bug in the assembler where
@@ -108,7 +108,7 @@

 ifneq ($(CONFIG_SPL_BUILD),y)
 # Check that only R_ARM_RELATIVE relocations are generated.
-ALL-y += checkarmreloc
+#ALL-y += checkarmreloc
 # The movt / movw can hardcode 16 bit parts of the addresses in the
 # instruction. Relocation is not supported for that case, so disable
 # such usage by requiring word relocations.

3、修改configs/smdk2440_defconfig

diff -urN u-boot-2016.11/configs/smdk2440_defconfig u-boot-2016.11_s3c2440/configs/smdk2440_defconfig
--- u-boot-2016.11/configs/smdk2440_defconfig   2018-06-14 22:37:01.047660155 +0800
+++ u-boot-2016.11_s3c2440/configs/smdk2440_defconfig   2018-06-14 22:47:45.395660155 +0800
@@ -5,14 +5,14 @@
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="SMDK2440 # "
-CONFIG_CMD_USB=y
+#CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
-CONFIG_CMD_DHCP=y
+#CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
-CONFIG_CMD_EXT2=y
-CONFIG_CMD_FAT=y
-CONFIG_CMD_UBI=y
-CONFIG_USB=y
-CONFIG_USB_STORAGE=y
-CONFIG_USB_KEYBOARD=y
+#CONFIG_CMD_EXT2=y
+#CONFIG_CMD_FAT=y
+#CONFIG_CMD_UBI=y
+#CONFIG_USB=y
+#CONFIG_USB_STORAGE=y
+#CONFIG_USB_KEYBOARD=y

4、修改include/configs/smdk2440.h

diff -urN u-boot-2016.11/include/configs/smdk2440.h u-boot-2016.11_s3c2440/include/configs/smdk2440.h
--- u-boot-2016.11/include/configs/smdk2440.h   2018-06-14 22:37:01.047660155 +0800
+++ u-boot-2016.11_s3c2440/include/configs/smdk2440.h   2018-06-14 22:45:30.747660155 +0800
@@ -45,6 +45,7 @@
 #define CONFIG_S3C24X0_SERIAL
 #define CONFIG_SERIAL1     1   /* we use SERIAL 1 on SMDK2410 */

+#if 0
 /************************************************************
  * USB support (currently only works with D-cache off)
  ************************************************************/
@@ -56,6 +57,7 @@
  * RTC
  ************************************************************/
 #define CONFIG_RTC_S3C24X0
+#endif

 #define CONFIG_BAUDRATE        115200

@@ -71,7 +73,7 @@
  * Command line configuration.
  */
 #define CONFIG_CMD_BSP
-#define CONFIG_CMD_DATE
+/* #define CONFIG_CMD_DATE */
 #define CONFIG_CMD_NAND
 #define CONFIG_CMD_REGINFO

@@ -160,6 +162,7 @@
 #define CONFIG_SYS_NAND_BASE       0x4E000000
 #endif

+#if 0
 /*
  * File system
  */
@@ -169,6 +172,7 @@
 #define CONFIG_MTD_PARTITIONS
 #define CONFIG_YAFFS2
 #define CONFIG_RBTREE
+#endif

 /* additions for new relocation code, must be added to all boards */
 #define CONFIG_SYS_SDRAM_BASE  PHYS_SDRAM_1

5、编译u-boot.bin并烧写到Nor Flash上

book@ubuntu:~/u-boot-2016.11$ ./auto_run.sh  
book@ubuntu:~/u-boot-2016.11$ ls -lh u-boot.bin  
-rwxrwxr-x 1 david david 230K 6月  14 23:53 u-boot.bin

裁剪后u-boot的大小明显比之前小了很多，我们将它烧写到Nor Flash上看会有什么现象？
这里写图片描述
到这里初步可以用Nor Flash启动u-boot了！

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