u-boot_smdkv210 分析三:启动代码lowlevel.s分析
摘要:
_TEXT_BASE:.wordTEXT_BASE.globl lowlevel_initlowlevel_init:push{lr} 1.lr入栈/* check reset status */ldrr0, =(ELFIN_CLOCK_POWER_BASE+RST_STAT_OFFSET) 2.读取复位标志,如果是睡眠唤醒,跳过接下来的初始化ldrr1, [r0]bicr1, r1, #0xfff6ffffcmpr1, #0x10000beqwakeup_reset_precmpr1, #0x80000beqwakeup_reset_from_didle/* IO Retention rel 阅读全文
posted @ 2012-02-29 21:27 Efronc 阅读(4092) 评论(0) 推荐(1) 编辑