1. 出错信息:error: void value not ignored as it ought to be
解决方案:头文件声明的函数类型和函数实际类型不一致。
2. 出错信息: unrecognized/unsupported machine ID
解决方案:This
kind of error message happens if the machine ID which is set in U-Boot
doesn't match the kernel's ID(s). Unfortunately a standard U-Boot sets
the machine ID on AT91RM9200DK boards not to MACH_TYPE_AT91RM9200DK but
to the generic MACH_TYPE_AT91RM9200. You can either this in
board/at91rm9200dk/at91rm9200dk.c; I would recommend to obtain a new
machine ID and create your own U-Boot board type, using
board/at91rm9200dk as a template. The list of machine IDs can be found
in include/asm-arm/mach-types.h.
The Linux kernel has to be
changed accordingly to the above machine ID. There you can find the
information in arch/arm/tools/mach-types
arch/arm/boot/compressed/head-at91rm9200.S
arch/arm/mach-at91rm9200/board-dk.c
具体资料如下:
U-boot端include/asm-arm/mach-types.h支持的at91rm9200的machine类型有:
#define MACH_TYPE_AT91RM9200 251
#define MACH_TYPE_AT91RM9200DK 262
但是在board/at91rm9200dk/at91rm9200dk.c中,虽然注释中说明使用的是AT91RM9200DK-Board,但是实际使用的是MACH_TYPE_AT91RM9200。
int board_init (void) { /* Enable Ctrlc */ console_init_f ();
/* Correct IRDA resistor problem */ /* Set PA23_TXD in Output */ ((AT91PS_PIO) AT91C_BASE_PIOA)->PIO_OER = AT91C_PA23_TXD2;
/* memory and cpu-speed are setup before relocation */ /* so we do _nothing_ here */
/* arch number of AT91RM9200DK-Board */ gd->bd->bi_arch_number = MACH_TYPE_AT91RM9200; /* adress of boot parameters */ gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
return 0; }
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Linux内核端:
arch/arm/tools/mach-types支持的at91rm9200的machine的ID有:
at91rm9200 ARCH_AT91RM9200 AT91RM9200 251
at91rm9200dk ARCH_AT91RM9200DK AT91RM9200DK 262
at91rm9200tb ARCH_AT91RM9200TB AT91RM9200TB 380
at91rm9200kr MACH_AT91RM9200KR AT91RM9200KR 450
at91rm9200ek MACH_AT91RM9200EK AT91RM9200EK 705
at91rm9200utl MACH_AT91RM9200UTL AT91RM9200UTL 821
at91rm9200kg MACH_AT91RM9200KG AT91RM9200KG 975
at91rm9200rb MACH_AT91RM9200RB AT91RM9200RB 1060
at91rm9200df MACH_AT91RM9200DF AT91RM9200DF 1119
arch/arm/boot/compressed/head-at91rm9200.S支持的有:
.section ".start", "ax"
@ Atmel AT91RM9200-DK : 262 mov r3, #(MACH_TYPE_AT91RM9200DK & 0xff) orr r3, r3, #(MACH_TYPE_AT91RM9200DK & 0xff00) cmp r7, r3 beq 99f
@ Cogent CSB337 : 399 mov r3, #(MACH_TYPE_CSB337 & 0xff) orr r3, r3, #(MACH_TYPE_CSB337 & 0xff00) cmp r7, r3 beq 99f
@ Cogent CSB637 : 648 mov r3, #(MACH_TYPE_CSB637 & 0xff) orr r3, r3, #(MACH_TYPE_CSB637 & 0xff00) cmp r7, r3 beq 99f
@ Atmel AT91RM9200-EK : 705 mov r3, #(MACH_TYPE_AT91RM9200EK & 0xff) orr r3, r3, #(MACH_TYPE_AT91RM9200EK & 0xff00) cmp r7, r3 beq 99f
@ Conitec Carmeva : 769 mov r3, #(MACH_TYPE_CARMEVA & 0xff) orr r3, r3, #(MACH_TYPE_CARMEVA & 0xff00) cmp r7, r3 beq 99f
@ KwikByte KB920x : 612 mov r3, #(MACH_TYPE_KB9200 & 0xff) orr r3, r3, #(MACH_TYPE_KB9200 & 0xff00) cmp r7, r3 beq 99f
@ Embest ATEB9200 : 923 mov r3, #(MACH_TYPE_ATEB9200 & 0xff) orr r3, r3, #(MACH_TYPE_ATEB9200 & 0xff00) cmp r7, r3 beq 99f
@ Sperry-Sun KAFA : 662 mov r3, #(MACH_TYPE_KAFA & 0xff) orr r3, r3, #(MACH_TYPE_KAFA & 0xff00) cmp r7, r3 beq 99f
@ Ajeco 1ARM : 1075 mov r3, #(MACH_TYPE_ONEARM & 0xff) orr r3, r3, #(MACH_TYPE_ONEARM & 0xff00) cmp r7, r3 beq 99f
@ Unknown board, use the AT91RM9200DK board @ mov r7, #MACH_TYPE_AT91RM9200 mov r7, #(MACH_TYPE_AT91RM9200DK & 0xff) orr r7, r7, #(MACH_TYPE_AT91RM9200DK & 0xff00)
99:
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真正的配置信息是在arch/arm/mach-at91rm9200/board-dk.c中。
MACHINE_START(AT91RM9200DK, "Atmel AT91RM9200-DK") /* Maintainer: SAN People/Atmel */ .phys_io = AT91_BASE_SYS, .io_pg_offst = (AT91_VA_BASE_SYS >> 18) & 0xfffc, .boot_params = AT91_SDRAM_BASE + 0x100, .timer = &at91rm9200_timer, .map_io = dk_map_io, .init_irq = dk_init_irq, .init_machine = dk_board_init, MACHINE_END
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由此可以看出,Uboot使用的AT91RM9200的machine ID,而内核配置的是at91rm9200 dk的machine
ID,在这种情况下就出现了不一致。所以更改的方法:
方法一、把Uboot中board init中更改为MACH_TYPE_AT91RM9200DK
方法二、把MACHINE_START(AT91RM9200DK, "Atmel AT91RM9200-DK")更改为MACHINE_START(AT91RM9200, "Atmel AT91RM9200-DK")。
方法三、查看arch/arm/boot/compressed目录下是否存在head_at91rm9200.S并且支持at91rm9200架构。
只要U-boot和Linux kernel一致即可。
3.
C compiler cannot create executables问题 gcc编译环境没用配好, 直接apt-get install gcc libc6-dev就可以解决
4. tar: bzip2: Cannot exec: No such file or directory"
apt-get install bzip2
5. 问题:如果你在uboot保存环境变量时saveenv,出现Error: end address not on sector boundary
解
决办法:/include/configs/at91rm9200dk.h(smdk2410.h)中 #define CFG_ENV_ADDR
(PHYS_FLASH_1+0X20000) #define CFG_ENV_SIZE
0X20000(将环境变量放到了0x10040000,大家也可以根据具体情况改变你的地址,即修改CFG_ENV_ADDR)
6.make menuconfig需要libncurses库,直接安装libncurses5-dev
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