using_nand_flash_with_u-boot_and_linux_kernel.html

ADI 公司blackfin系列的用户使用文挡。

For further information see:
http://www.uclinux.org/
http://blackfin.uclinux.org/



BusyBox v1.00 (2006.01.20-06:56+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.

root:~>
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<h2><a name="loading_uclinux_kernel_from_the_nand_flash_with_yaffs_rootfs" id="loading_uclinux_kernel_from_the_nand_flash_with_yaffs_rootfs">Loading uClinux kernel from the NAND flash with YAFFS rootfs</a></h2>
<div class="level2">
<ul>
<li class="level1"><div class="li"> Build kernel with NAND support and make the yaffs image on your linux host, See the section: <a href="blackfin_nand_flash_mtd_driver.html" class="wikilink1" title="blackfin_nand_flash_mtd_driver.html">blackfin_nand_flash_mtd_driver</a></div>
</li>
<li class="level1"><div class="li"> On the target board, format the file system partition and install the YAFFS file system image<pre class="code">
root:~&gt;mkyaffs -e /dev/mtd2 yaffs.img
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</li>
<li class="level1"><div class="li"> Program the kernel image to the NAND flash by U-Boot<pre class="code">
U-Boot-1.1.3-ADI-2005R4 (Feb  8 2006 - 15:49:36)

CPU:   ADSP BF537 Rev.: 0.2
Board: ADI BF537 stamp board
       Support: http://blackfin.uclinux.org/
Clock: VCO: 500 MHz, Core: 500 MHz, System: 100 MHz
SDRAM: 64 MB
FLASH:   4 MB
In:    serial
Out:   serial
Err:   serial
NAND:  16 MB
Net:    ADI BF537 EMAC
I2C:   ready
Hit any key to stop autoboot:  0
bf537&gt; tftpboot 0x1000000 uImage
Using MAC Address 00:E0:22:FE:42:84
TFTP from server 192.168.0.2; our IP address is 192.168.0.15
Filename 'uImage'.
Load address: 0x1000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         ###########
done
Bytes transferred = 2713868 (29690c hex)

bf537&gt; nand erase 0x0 0x400000

NAND erase: device 0 offset 0, size 4194304 ... OK
bf537&gt; nand write 0x1000000 0x0 $(filesize)

NAND write: device 0 offset 0, size 2713868 ...  2713868 bytes written: OK
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</li>
<li class="level1"><div class="li"> Set the boot arguments<pre class="code">
bf537&gt; setenv bootargs root=/dev/mtdblock2 rw rootfstype=yaffs
bf537&gt; setenv autostart yes
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</li>
<li class="level1"><div class="li"> Boot from the NAND flash with YAFFS rootfs.<pre class="code">
bf537&gt; nboot 0x2000000 0

Loading from device 0: &lt;NULL&gt; at 0x20202000 (offset 0x0)
   Image Name:   uClinux Kernel and Filesystem
   Created:      2006-02-08  10:07:01 UTC
   Image Type:   Blackfin Linux Kernel Image (gzip compressed)
   Data Size:    2713804 Bytes =  2.6 MB
   Load Address: 00001000
   Entry Point:  00001000
Automatic boot of image at addr 0x02000000 ...
## Booting image at 02000000 ...
   Image Name:   uClinux Kernel and Filesystem
   Created:      2006-02-08  10:07:01 UTC
   Image Type:   Blackfin Linux Kernel Image (gzip compressed)
   Data Size:    2713804 Bytes =  2.6 MB
   Load Address: 00001000
   Entry Point:  00001000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
Starting Kernel at = 1000
Linux version 2.6.12.1 (aubrey@linux) (gcc version 3.4.5) #2 Wed Feb 8 17:42:00 CST 2006
Blackfin support (C) 2004 Analog Devices, Inc.
ADSP-BF537 Rev. 0.2
uClinux/BF537
Blackfin uClinux support by blackfin.uclinux.org
Processor Speed: 500 MHz core clock and 100 Mhz System Clock
Board Memory: 64MB
Memory map:
  text = 0x001000-0x0e69a4
  data = 0x0f3924-0x120e90
  bss  = 0x120e90-0x12eac8
  rootfs = 0x3700000-0x3f00000
  stack = 0x0f4000-0x0f6000
Command line: 'root=/dev/mtdblock2 rw rootfstype=yaffs'
Instruction Cache Enabled
Data Cache Enabled (write-through)
Hardware Trace Enabled
Built 1 zonelists
Kernel command line: root=/dev/mtdblock2 rw rootfstype=yaffs
Configuring Blackfin Priority Driven Interrupts
PID hash table entries: 256 (order: 8, 4096 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Physical pages: 3700
Memory available: 54528k/64561k RAM, (50k init code, 918k kernel code, 236k data, 9216k dma)
Blackfin Scratchpad data SRAM: 4 KB
Blackfin DATA_A SRAM: 16 KB
Blackfin DATA_B SRAM: 16 KB
Security Framework v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512
NET: Registered protocol family 16
Blackfin DMA Controller for BF533
stamp_init(): registering device resources
yaffs Feb  8 2006 17:40:41 Installing.
Real Time Clock Driver v1.10e
BlackFin BF533 serial driver version 2.00 With DMA Support
io scheduler noop registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Blackfin 537 mac net device registered.
uclinux[mtd]: RAM probe address=0x3700000 size=0x800000
Creating 1 MTD partitions on &quot;RAM&quot;:
0x00000000-0x00800000 : &quot;EXT2fs&quot;
uclinux[mtd0]: set EXT2fs to be root filesystem
NAND device: Manufacturer ID: 0x20, Chip ID: 0x73 (ST Micro NAND 16MiB 3,3V 8-bit)
Scanning device for bad blocks
Bad eraseblock 807 at 0x00c9c000
Creating 2 MTD partitions on &quot;NAND 16MiB 3,3V 8-bit&quot;:
0x00000000-0x00400000 : &quot;linux kernel&quot;
0x00400000-0x01000000 : &quot;file system&quot;
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
NET: Registered protocol family 1
NET: Registered protocol family 17
yaffs: dev is 32505858 name is &quot;mtdblock2&quot;
yaffs: Attempting MTD mount on 31.2, &quot;mtdblock2&quot;
yaffs: yaffs_GutsInitialise()
block 552 is bad
yaffs: yaffs_GutsInitialise() done.

VFS: Mounted root (yaffs filesystem).
Freeing unused kernel memory: 48k freed (0xe7000 - 0xf2000)
ttyS0 at irq = 18 is a builtin BlackFin UART
dma_alloc_init: dma_page @ 0x000f0000 - 256 pages at 0x03f00000
bfin_change_speed: baud = 57600, cval = 0x13

Welcome to:
       ____ _  _
      /  __| ||_|             _  _
 _   _| |  | | _ ____  _   _ \ \/ /
| | | | |  | || |  _ \| | | | \  /
| |_| | |__| || | | | | |_| | /  \
|  ___\____|_||_|_| |_|\____|/_/\_\
|_|

For further information see:
http://www.uclinux.org/
http://blackfin.uclinux.org/



BusyBox v1.00 (2006.02.08-08:59+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.

root:~&gt; cat /proc/cmdline
root=/dev/mtdblock2 rw rootfstype=yaffs
root:~&gt;
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</li>
<li class="level1"><div class="li"> Upgrade the kernel image. As the above mentioned, you can upgrade the kernel image by the uboot. You also can upgrade the kernel image in the kernel by a simple &ldquo;cp&rdquo; command line.<pre class="code">
root:~&gt; cat /proc/cmdline
root=/dev/mtdblock2 rw rootfstype=yaffs
root:~&gt; cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00800000 00001000 &quot;EXT2fs&quot;
mtd1: 00400000 00004000 &quot;linux kernel&quot;
mtd2: 00c00000 00004000 &quot;file system&quot;
root:~&gt; ls
bin         home        mnt         sbin        uImage
dev         lib         proc        sys         usr
etc         lost+found  root        tmp         var
root:~&gt; cp uImage /dev/mtd1
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</li>
</ul>

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