《朱老师物联网大讲堂》学习笔记
学习地址:www.zhulaoshi.org
这个笔记记得更改!
#if defined(CONFIG_EVT1)
/* If BL1 was copied from SD/MMC CH2 */
ldr r0, =0xD0037488//见下图,用于选择从哪个通道启动,
ldr r1, [r0]
ldr r2, =0xEB200000
cmp r1, r2
beq mmcsd_boot
#endif
ldr r0, =INF_REG_BASE
ldr r1, [r0, #INF_REG3_OFFSET]
cmp r1, #BOOT_NAND /* 0x0 => boot device is nand */
beq nand_boot
cmp r1, #BOOT_ONENAND /* 0x1 => boot device is onenand */
beq onenand_boot
cmp r1, #BOOT_MMCSD
beq mmcsd_boot
cmp r1, #BOOT_NOR
beq nor_boot
cmp r1, #BOOT_SEC_DEV
beq mmcsd_boot