NanoPC-T2 Uboot启动过程分析 - 2-6 board_init_r() part 2

在继续分析之前，先回顾当前 gd 的内容：

bd_t *bd = 0x42BF_FF10

{

unsigned long bi_memstart = 0

phys_size_t bi_memsize = 0

unsigned long bi_flashstart = 0

unsigned long bi_flashsize = 0

unsigned long bi_flashoffset = 0

unsigned long bi_sramstart = 0

unsigned long bi_sramsize = 0

unsigned long bi_bootflags = 0

unsigned long bi_ip_addr = 0

unsigned char bi_enetaddr[6] = 0

unsigned short bi_ethspeed = 0

unsigned long bi_intfreq = 0

unsigned long bi_busfreq = 0

ulong bi_arch_number = 4330

ulong bi_boot_params = 0x4000_0100

struct bi_dram[1]

{

ulong start = 0x4000_0000

ulong size = 0x4000_0000

}

}

unsigned long flags = 0x0000_0001

unsigned int baudrate = 115200

unsigned long cpu_clk = 0

unsigned long bus_clk = 0

unsigned long pci_clk = 0

unsigned long mem_clk = 0