请教一个uboot的问题

wyyzxml

        .text      :
        {
          arch/arm/cpu/arm1176/start.o        (.text)
          board/samsung/xt6410/lowlevel_init.o (.text)         
          *(.text)
        }

红色部分是我加的，加了以后就编译不过了。

board/samsung/xt6410/libxt6410.o: In function `lowlevel_init':
/home/work/tiny6410/my/u-boot-2012.04-6410/board/samsung/xt6410/lowlevel_init.S:52: multiple definition of `lowlevel_init'
board/samsung/xt6410/lowlevel_init.o:/home/work/tiny6410/my/u-boot-2012.04-6410/board/samsung/xt6410/lowlevel_init.S:52: first defined here
board/samsung/xt6410/libxt6410.o: In function `mmu_table':
xt6410.c.mmudata+0x0): multiple definition of `mmu_table'
board/samsung/xt6410/lowlevel_init.o.mmudata+0x0): first defined here
arm-linux-ld: warning: creating a DT_TEXTREL in object.
make: *** [u-boot] Error 1

在lowlevel_init.S中有下面的定义：

#ifdef CONFIG_ENABLE_MMU
/*
* MMU Table for SMDK6400
*/

        /* form a first-level section entry */
.macro FL_SECTION_ENTRY base,ap,d,c,b
        .word (\base << 20) | (\ap << 10) | \
              (\d << 5) | (1<<4) | (\c << 3) | (\b << 2) | (1<<1)
.endm

.section .mmudata, "a"
        .align 14
        /* the following alignment creates the mmu table at address 0x4000. */
        .globl mmu_table
mmu_table:
        .set __base, 0
        /* 1:1 mapping for debugging */
        .rept 0xA00
        FL_SECTION_ENTRY __base, 3, 0, 0, 0
        .set __base, __base + 1
        .endr

        /* access is not allowed. */
        .rept 0xC00 - 0xA00
        .word 0x00000000
        .endr

        /* 128MB for SDRAM 0xC0000000 -> 0x50000000 */
        .set __base, 0x500
        .rept 0xC80 - 0xC00
        FL_SECTION_ENTRY __base, 3, 0, 1, 1
        .set __base, __base + 1
        .endr

        /* access is not allowed. */
        .rept 0x1000 - 0xc80
        .word 0x00000000
        .endr
#endif

wyyzxml

解决了，较新的uboot的链接行为改变了。
手动排布需要先修改makefile，把要修改的文件剔除出来。

LOWLEVEL_INIT        := lowlevel_init.o

SRCS    := $(LOWLEVEL_INIT:.o=.S) $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
OBJS        := $(addprefix $(obj),$(COBJS-y))
SOBJS        := $(addprefix $(obj),$(SOBJS))
LOWLEVEL_INIT        := $(addprefix $(obj),$(LOWLEVEL_INIT))


   

embeddedlwp

你可以写 个文档发到嵌入式版