让vdsp与uclinux共舞（4）：加载uclinux

快乐虾

http://blog.csdn.net/lights_joy/

[email protected]

本文适用于

ADSP-BF561

Visual DSP++ 5.0(update 6)

Bfin-uclinux-2009r1.6

 

欢迎转载，但请保留作者信息

 

现在我们希望尝试用vdsp控制uclinux，为了降低点难度，首先尝试一个比较简单的内核，在内核中关闭SMP支持和PLL配置。

本来以为只要在vdsp中加载linux.initramfs，然后跳转到__start开始执行就OK了，只是当执行到setup_arch的时候就跑飞了，暂时不知道什么原因，算了，先用咱的土办法吧。

先使用前文提到的方法在VDSP下控制住uboot，或者直接用vdsp加载编译好的uboot，然后在uboot的命令行下引导uclinux内核：

bfin>tftp 2800000 192.168.33.105:uImage

dm9000 i/o: 0x2c000000, id: 0x90000a46

DM9000: running in 16 bit mode

MAC: 00:0c:f1:34:92:80

operating at 100M full duplex mode

TFTP from server 192.168.33.105; our IP address is 192.168.33.200

Filename 'uImage'.

Load address: 0x2800000

Loading: *#################################################################

        #################################################################

        #################################################################

        #################################################################

        ##

done

Bytes transferred = 3833355 (3a7e0b hex)

bfin>bootm 2800000

## Booting kernel from Legacy Image at 02800000 ...

   Image Name:   Linux-2.6.28.10-ADI-2009R1

   Image Type:   Blackfin Linux Kernel Image (gzip compressed)

   Data Size:    3833291 Bytes =  3.7 MB

   Load Address: 00001000

   Entry Point:  001b5664

   Verifying Checksum ... OK

   Uncompressing Kernel Image ... OK

Starting Kernel at = 001b5664

Linux version 2.6.28.10-ADI-2009R1 ([email protected]) (gcc version 4.1.2 (ADI svn)) #34 Sun Nov 1 22:05:10 CST 2009

bootconsole [early_shadow0] enabled

Board Memory: 48MB

Kernel Managed Memory: 32MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x00131af0

  rodata    = 0x00131af0-0x0017fff8

  bss       = 0x00180000-0x0019559c

  data      = 0x0019559c-0x001a8000

    stack   = 0x001a6000-0x001a8000

  init      = 0x001a8000-0x0075f000

  available = 0x0075f000-0x01eff000

  DMA Zone  = 0x01f00000-0x02000000

Hardware Trace Active and Enabled

Boot Mode: 2

Blackfin support (C) 2004-2009 Analog Devices, Inc.

Compiled for ADSP-BF561 Rev 0.5

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 499 MHz core clock and 99 MHz System Clock

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

Data Cache Enabled for CPU0 (write-back)

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 7873

Kernel command line: console=ttySS1,57600n7 root=/dev/mtdblock0 mem=32m max_mem=48m

Configuring Blackfin Priority Driven Interrupts

PID hash table entries: 128 (order: 7, 512 bytes)

console [ttySS1] enabled, bootconsole disabled

Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)

Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)

Memory available: 23904k/32768k RAM, (5852k init code, 1218k kernel code, 474k data, 1024k dma, 292k reserved)

Calibrating delay loop... 997.37 BogoMIPS (lpj=1994752)

Security Framework initialized

Mount-cache hash table entries: 512

Blackfin Scratchpad data SRAM: 4 KB

Blackfin L1 Data A SRAM: 16 KB (15 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Instruction SRAM: 16 KB (5 KB free)

Blackfin L2 SRAM: 128 KB (128 KB free)

net_namespace: 288 bytes

NET: Registered protocol family 16

Blackfin DMA Controller

ezkit_init(): registering device resources

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 1024 (order: 1, 8192 bytes)

TCP bind hash table entries: 1024 (order: 0, 4096 bytes)

TCP: Hash tables configured (established 1024 bind 1024)

TCP reno registered

NET: Registered protocol family 1

msgmni has been set to 46

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler cfq registered

bfin-dma: initialized

simple-gpio: now handling 48 GPIOs: 0 - 47

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 35) is a BFIN-UART

bfin-sport-uart.1: ttySS1 at MMIO 0xffc00900 (irq = 32) is a SPORT1

brd: module loaded

dm9000 Ethernet Driver, V1.31

eth0: dm9000a at 2c000000,2c000004 IRQ 117 MAC: 00:00:12:34:56:78 (platform data)

physmap platform flash device: 00800000 at 20000000

physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank

 Amd/Fujitsu Extended Query Table at 0x0040

number of CFI chips: 1

cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.

RedBoot partition parsing not available

Using physmap partition information

Creating 3 MTD partitions on "physmap-flash.0":

0x00000000-0x00040000 : "bootloader(nor)"

0x00040000-0x00200000 : "linux kernel(nor)"

0x00200000-0x00800000 : "file system(nor)"

bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs_base@ffc00500, dma channel@34

i2c-gpio i2c-gpio.0: using pins 1 (SDA) and 0 (SCL)

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

mmc_spi spi0.5: ASSUMING 3.2-3.4 V slot power

mmc_spi spi0.5: SD/MMC host mmc0, no DMA, no WP, no poweroff

TCP cubic registered

NET: Registered protocol family 17

mmc_spi spi0.5: requested mode not fully supported

mmc_spi spi0.5: can't change chip-select polarity

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

Freeing unused kernel memory: 5852k freed

mmc0: host does not support reading read-only switch. assuming write-enable.

mmc0: new SDHC card on SPI

mmcblk0: mmc0:0000 SD16G 14.9 GiB

 mmcblk0: p1

                           _____________________________________

        a8888b.           / Welcome to the uClinux distribution /

       d888888b.         /       _     _                         /

       8P"YP"Y88        /       | |   |_|            __  __ (TM)  |

       8|o||o|88  _____/        | |    _ ____  _   _ / // /       |

       8'    .88       /        | |   | |  _ /| | | | /  /        |

       8`._.' Y8.       /       | |__ | | | | | |_| | /  /        |

      d/      `8b.       /      /____||_|_| |_|/____|/_//_/       |

     dP   .    Y8b.       /   For embedded processors including   |

    d8:'  "  `::88b        /    the Analog Devices Blackfin      /

   d8"         'Y88b        /___________________________________/

  :8P    '      :888

   8a.   :     _a88P         For further information, check out:

 ._/"Yaa_:   .| 88P|            - http://blackfin.uclinux.org/

 /    YP"    `| 8P  `.          - http://docs.blackfin.uclinux.org/

 /     /.___.d|    .'           - http://www.uclinux.org/

 `--..__)8888P`._.'  jgs/a:f    - http://www.analog.com/blackfin

 

Have a lot of fun...

 

 

BusyBox v1.13.4 (2009-10-31 23:39:36 CST) built-in shell (msh)

Enter 'help' for a list of built-in commands.

 

root:/>

在VDSP下中断a核的执行，然后使用File -> Load symbol从vmlinux文件中加载符号信息，看看：

嘿嘿，很符合我们的期待啊，default_idle！～

接着我们搜寻sys_open，然后设置一个hardware break point，让a核继续运行，在命令行下使用ls，此时将在sys_open上中断下来：

 

试试单步运行，NO PROBLEM，YEAH！

本来想跑一个profile数据看看，只可惜得到这样的结果：

 

显然是不正确的，估计VDSP还需要一些额外的信息才行！

退出VDSP，内核将继续运行！

 

下面再试试在内核中加入详细的dwarf调试信息，看看能否做源码级的跟踪。

 

 

 

 

 

1       参考资料

让vdsp与uclinux共舞（3）：boot kernel(2009-10-31)

让vdsp与uclinux共舞（2）：vdsp的影响(2009-10-31)

让VDSP与uclinux共舞（1）：开篇(2009-10-30)