在配置中启用CONFIG_EARLY_PRINTK和CONFIG_DEBUG_KERNEL

Question

我在我的TI Sitara板配置file.while中启用了CONFIG_EARLY_PRINTK和CONFIG_DEBUG_KERNEL，按照error comes.Please help的说明构建了uImage，如果有人知道它为什么会出现，我试图找到它，但无法正确找出。

....
  CC      arch/arm/kernel/io.o
  AS      arch/arm/kernel/debug.o
arch/arm/kernel/debug.S: Assembler messages:
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `sub ,r1,r2'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `ldr r1,[,#0]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `ldr r2,[,#4]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#0]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#4]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#8]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#0]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#4]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#8]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#0]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#4]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `str r1,[,#8]'
arch/arm/kernel/debug.S:157: Error: ARM register expected -- `ldr ,[,#8]'
arch/arm/kernel/debug.S:157: Error: shift expression expected -- `add r1,r1,'
arch/arm/kernel/debug.S:157: Error: shift expression expected -- `add r2,r2,'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `sub ,r1,r2'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `ldr r1,[,#0]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `ldr r2,[,#4]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#0]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#4]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#8]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#0]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#4]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#8]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#0]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#4]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `str r1,[,#8]'
arch/arm/kernel/debug.S:173: Error: ARM register expected -- `ldr ,[,#8]'
arch/arm/kernel/debug.S:173: Error: shift expression expected -- `add r1,r1,'
arch/arm/kernel/debug.S:173: Error: shift expression expected -- `add r2,r2,'
make[1]: *** [arch/arm/kernel/debug.o] Error 1
make: *** [arch/arm/kernel] Error 2

Answer 1

针对Sitara处理器的最新主线内核版本希望用户通过内核配置指定DEBUG_LL UART。启用EARLY_PRINTK时，将显示不同主板和处理器变体的选项。您是否选择了正确的UART端口？