今天看了一下U-BOOT,有一地方不是太明白:
初始化存储器寄存器:
.globl lowlevel_init
lowlevel_init:
/*
next instruction fail due memory relocation...
we'll find the right MEMORY_CONFIG address with the next 3 lines...
*/
/*ldr r0, =MEMORY_CONFIG*/
mov r0, pc
ldr r1, =(0x38+4)
sub r0, r0, r1
ldmia r0, {r1-r13}
ldr r0, =0x01c80000
stmia r0, {r1-r13}
mov pc, lr
ldr r1, =(0x38+4)这一句是什么意思?参数是放在MEMORY_CONFIG标号后面的.
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