PowerPC功能很强的通信处理器，支持1000M以太网接口，以Freescale的P1010处理器为开发平台，讲述移植linux的整个过程，与大家分享。
1.配置交叉编译链
网上下载交叉编译工具，配置环境变量
sudo gedit /etc/environment
在末尾添加交叉编译链路径
:/home/freescale/work/tools/freescale/bin
log out(不需要重启)，输入如下，验证交叉编译是否安装成功：
freescale@freescale-sdk:~/work/u-boot$ powerpc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=powerpc-linux-gnu-gcc
........
gcc version 4.5.1 (Sourcery G++ Lite 2010.09-55)
freescale@freescale-sdk:~/work/u-boot$
2.新增单板
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ make distclean
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ cd board/freescale/
freescale@freescale-sdk:~/work/source/u-boot-2010.12/board/freescale$ cp p1010rdb p1010acce -rf
freescale@freescale-sdk:~/work/source/u-boot-2010.12/board/freescale$ cd ../..
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ cd include/configs/
freescale@freescale-sdk:~/work/source/u-boot-2010.12/include/configs$ cp P1010RDB.h P1010BOARD.h
freescale@freescale-sdk:~/work/source/u-boot-2010.12/include/configs$ cd ../..
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ vim boards.cfg
add:
P1010BOARD_NOR powerpc mpc85xx p1010acce freescale - P1010BOARD 1010BOARD
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ make P1010BOARD_NOR_config
Configuring for P1010BOARD_NOR - Board: P1010BOARD, Options: P1010BOARD
freescale@freescale-sdk:~/work/source/u-boot-2010.12$
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ make
Generating include/autoconf.mk
/home/freescale/work/source/u-boot-2010.12/include/asm/config_mpc85xx.h:328:2: error: #error Processor type not defined for this platform
Generating include/autoconf.mk.dep
/home/freescale/work/source/u-boot-2010.12/include/asm/config_mpc85xx.h:328:2: error: #error Processor type not defined for this platform
powerpc-linux-gnu-gcc -DDO_DEPS_ONLY \
-g -Os -mrelocatable -ffunction-sections -fdata-sections -fPIC -meabi -D__KERNEL__ -DCONFIG_SYS_TEXT_BASE=0xeff80000 -I/home/freescale/work/source/u-boot-2010.12/include -fno-builtin -ffreestanding -nostdinc -isystem /home/freescale/work/tools/freescale-2010.09/bin/../lib/gcc/powerpc-linux-gnu/4.5.1/include -pipe -DCONFIG_PPC -D__powerpc__ -ffixed-r2 -Wa,-me500 -msoft-float -mno-string -mno-spe -Wall -Wstrict-prototypes -fno-stack-protector \
-o lib/asm-offsets.s lib/asm-offsets.c -c -S
In file included from /home/freescale/work/source/u-boot-2010.12/include/asm/config.h:25:0,
from /home/freescale/work/source/u-boot-2010.12/include/config.h:6,
from /home/freescale/work/source/u-boot-2010.12/include/common.h:37,
from lib/asm-offsets.c:18:
/home/freescale/work/source/u-boot-2010.12/include/asm/config_mpc85xx.h:328:2: error: #error Processor type not defined for this platform
make: *** [lib/asm-offsets.s] Error 1
freescale@freescale-sdk:~/work/source/u-boot-2010.12$
编译报错，修改如下：
solutions:
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ vim boards.cfg
P1010BOARD_NOR powerpc mpc85xx p1010acce freescale - P1010BOARD1010RDB
继续编译，成功生成u-boot.bin
freescale@freescale-sdk:~/work/source/u-boot-2010.12$ make P1010BOARD_NOR
........
.5.1/nof -lgcc -Map u-boot.map -o u-boot
powerpc-linux-gnu-objcopy -O srec u-boot u-boot.srec
powerpc-linux-gnu-objcopy --gap-fill=0xff -O binary u-boot u-boot.bin
freescale@freescale-sdk:~/work/source/u-boot-2010.12$
3.修改配置支持DDR3
烧写上面生成的u-boot.bin(0xfff80000),配置串口 115200 8 n 1，打印如下：
U-Boot 2013.01-dirty (May 18 2015 - 20:04:36)
CPU: P1010, Version: 1.0, (0x80f10010)
Core: E500, Version: 5.1, (0x80212151)
Clock Configuration:
CPU0:800 MHz,
CCB:400 MHz,
DDR:200 MHz (400 MT/s data rate) (Synchronous), IFC:100 MHz
L1: D-cache 32 kB enabled
I-cache 32 kB enabled
Board: P1010RDB
I2C: ready
SPI: ready
DRAM: DDR: failed to read SPD from address 82
SPD error on controller 0! Trying fallback to raw timing calculation
Detected UDIMM Fixed DDR on board
The choosen cas latency 5 is too large
1 GiB (DDR3, 32-bit, CL=5, ECC off)
Flash: 32 MiB
L2: 256 KB enabled
NAND: 16 MiB
MMC: FSL_SDHC: 0
*** Warning - bad CRC, using default environment
PCIe1: Root Complex of mini PCIe Slot, no link, regs @ 0xffe0a000
PCIe1: Bus 00 - 00
PCIe2: Root Complex of PCIe Slot, no link, regs @ 0xffe09000
PCIe2: Bus 01 - 01
In: serial
Out: serial
Err: serial
Net: PHY reset timed out
PHY reset timed out
PHY reset timed out
eTSEC1 [PRIME], eTSEC2, eTSEC3
Hit any key to stop autoboot: 0
系统启动不稳定，经常卡死。log打印显示DDR配置失败。DDR: failed to read SPD from address 82
跟踪代码
_start:
bl cpu_init_early_f
bl cpu_init_f
init_early_memctl_regs();
bl board_init_f
Board.c (...\u-boot-2010.12\arch\powerpc\lib) 27583 2015/5/18
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr) () != 0) {
hang ();
}
probecpu,
board_early_init_f,
init_timebase,
env_init,
init_baudrate,
serial_init,
console_init_f,
display_options,
checkcpu,
checkboard,INIT_FUNC_WATCHDOG_RESET
init_func_i2c,
init_func_spi,
INIT_FUNC_WATCHDOG_RESET
init_func_ram,
puts ("DRAM: ");
initdram (0)
Cpu.c (...\u-boot-2010.12\arch\powerpc\cpu\mpc85xx) 14954 2015/5/18
#if defined(CONFIG_SPD_EEPROM) || \
defined(CONFIG_DDR_SPD) || \
defined(CONFIG_DDR_RAW_TIMING)
dram_size = fsl_ddr_sdram();
#else
dram_size = fixed_sdram();
#endif
比对P1010rdb单板，新建单板没有使用SPD，利用ERROE_ROM存储DDR配置信息，去掉SPD相关宏，修改如下：
P1010BOARD.h
/* DDR Setup */
#define CONFIG_FSL_DDR3
/*#define CONFIG_DDR_RAW_TIMING
#define CONFIG_DDR_SPD
#define CONFIG_SYS_SPD_BUS_NUM 1*/
#define SPD_EEPROM_ADDRESS 0x52
修改Ddr.c (....\u-boot-2010.12\board\freescale\p1010acce) 7474 5/23/2015
ddr_freq = get_ddr_freq(0);
modified to
ddr_freq = 667*1000000;//配置成667MHz
4.编译烧写单板，系统启动正常
U-Boot 2010.12 (May 23 2015 - 13:59:51)
CPU: P1010, Version: 1.0, (0x80f10010)
Core: E500, Version: 5.1, (0x80212151)
Clock Configuration:
CPU0:800 MHz,
CCB:400 MHz,
ddr_ratio = 7
DDR:200 MHz (400 MT/s data rate) (Synchronous), IFC:100 MHz
L1: D-cache 32 kB enabled
I-cache 32 kB enabled
Board: P1010RDB
I2C: ready
SPI: ready
DRAM: Configuring DDR for 667 MT/s data rate
DDR: 1 GiB (DDR3, 32-bit, CL=5, ECC off)
FLASH: 32 MiB
L2: 256 KB enabled
NAND: NAND device: Manufacturer ID: 0x53, Chip ID: 0x53 (Unknown NAND 16MiB 3,3V 16-bit)
NAND bus width 8 instead 16 bit
No NAND device found!!!
0 MiB
*** Warning - bad CRC, using default environment
PCIe1: Root Complex of mini PCIe Slot, no link, regs @ 0xffe0a000
PCIe1: Bus 00 - 00
PCIe2: Root Complex of PCIe Slot, no link, regs @ 0xffe09000
PCIe2: Bus 01 - 01
In: serial
Out: serial
Err: serial
Net: PHY reset timed out
PHY reset timed out
PHY reset timed out
eTSEC1 [PRIME], eTSEC2, eTSEC3
Hit any key to stop autoboot: 0 |
