reset:
bl save_boot_params
/*
* set the cpu to SVC32 mode
*/
mrs r0, cpsr
bic r0, r0, #0x1f
orr r0, r0, #0xd3
msr cpsr,r0
bl led_on ---------------------------------------》》》》》》》这里调用点灯的子函数没有问题
/*
* Setup vector:
* (OMAP4 spl TEXT_BASE is not 32 byte aligned.
* Continue to use ROM code vector only in OMAP4 spl)
*/
#if !(defined(CONFIG_OMAP44XX) && defined(CONFIG_SPL_BUILD))
/* Set V=0 in CP15 SCTRL register - for VBAR to point to vector */
mrc p15, 0, r0, c1, c0, 0 @ Read CP15 SCTRL Register
bic r0, #CR_V @ V = 0
mcr p15, 0, r0, c1, c0, 0 @ Write CP15 SCTRL Register /*写0表示异常向量的地址可以被重新映射*/
bl led_on ---------------------------------------》》》》》》》这里调用点灯的子函数没有问题
/* Set vector address in CP15 VBAR register */
ldr r0, =_start
mcr p15, 0, r0, c12, c0, 0 @Set VBAR
bl led_on ---------------------------------------》》》》》》》上面两个地方调用都没有问题，如果在设置完VBAR后就会出现灯不亮的情况
#endif
大神帮忙看一下是为什么谢谢了！！！
