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SkyEye的Flash模拟的进展及存在的问题
欢迎测试并积极参与
[email protected]
请到
http://gro.clinux.org/frs/?group_id=327&release_id=666
下载Flash模拟测试套件
skyeye-flash.tar.bz2
陈老师已经放假回家，能成功进行Flash模拟的测试套件可能要能到春节后发布了！
前言：
SkyEye的Flash模拟首先是建立了一个Flash模拟框架，然后对ipaqsim（[email protected]）的Flash模拟模块的代码进行了部分修改并移植到SkyEye的Flash模拟框架中。
以下是ipaqsim的README文件对ipaqsim的介绍。
iPAQ Simulator (ipaqsim)
Sep 09, 2004
---------------------------------------------------------------------
This is a full machine simulation for iPAQ device. The CPU simulation
code is based on Skyeye (www.skyeye.org) project. However, all the code
is re-written in C++ and much more organized. Important peripherals are
added: Flash, microcontroller, sleeve, wireless PC card, etc... to enable
the boot of Familiar Linux (familiar.handhelds.org).
。。。 。。。
---------------------------------------------------------------------
Ipaqsim模拟的Flash是INTEL 28F640J3A，SkyEye目前模拟的Flash是Lubbock采用的INTEL 28F128J3A。SkyEye计划在Flash模拟框架下模拟更多厂商更多型号的Flash，这一工作需要大家的热情和积极参与。
内容：
一 目前的进展
二 目前存在的问题
三 详细的输出信息
四 u-boot-1.1.2 for Lubbock的编译
五 linux-2.6.10 for Lubbock的编译
六 SkyEye调试armlinux内核的方法
一 目前的进展
（1）对u-boot的Flash操作的支持
 u-boot启动时能探测到Flash的类型(INTEL 28F128J3A)及大小（（16M+16M）+（16M+16M））
 u-boot的flinfo能打印出所有的Flash扇区信息。
 支持u-boot对Flash的读，写，擦除操作。
（2）对armlinux的MTD驱动的支持
 armlinux启动时能能探测到Flash的存在并创建4个MTD分区（3+1）。
Creating 3 MTD partitions on "Lubbock Boot ROM":
0x00000000-0x00040000 : "Bootloader"
0x00040000-0x00140000 : "Kernel"
0x00140000-0x02000000 : "Filesystem"
Registering Lubbock Application Flash as whole device
 如果先挂上ramdisk，内核正常启动并进入shell，Linux-2.6.10/.config中对应的CONFIG_CMDLINE是：
CONFIG_CMDLINE=”root=/dev/ram rw initrd=0xa1000000,0x00800000 console=ttyS0,115200 mem=64M”
在/proc/mtd下能看到4个MTD设备。
/> cat /proc/mtd
dev: size erasesize name
mtd0: 00040000 00040000 "Bootloader"
mtd1: 00100000 00040000 "Kernel"
mtd2: 01ec0000 00040000 "Filesystem"
mtd3: 02000000 00040000 "Lubbock Application Flash"
 可以将Flash上的第二个MTD分区中的JFFS2文件系统挂载到位于RAM中的ramdisk文件系统上。
/> mount -t jffs2 /dev/mtdblock2 /mnt
/> cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / ext2 rw 0 0
proc /proc proc rw,nodiratime 0 0
/dev/mtdblock2 /mnt jffs2 rw,noatime 0 0
 其他操作
（未验证）如果用arm-linux-gcc编译erase, mkfs.jffs2,应该可以进行如下操作：
/>mkdir –p jffs2-dir/test
/> mkfs.jffs2 -d jffs2-dir -o jffs2.img
/> erase /dev/mtd3
/> cp jffs2.img /dev/mtd3
/>mount –t jffs2 /dev/mtdblock3 /mnt
/>ls /mnt
test
/>
二 目前存在的问题
（1）内核无法在启动时挂载位于第一块Flash（Lubbock Boot ROM）上的JFFS2文件系统。Linux-2.6.10/.config中对应的CONFIG_CMDLINE是：
CONFIG_CMDLINE =“root=/dev/mtdblock2 rw console=ttyS0,115200 mem=64M”
内核启动到如下位置就停止了：
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
（2）如果先挂上ramdisk ,shell启动后将位于Flash上的一个MTD分区mount之后，虽然能够对Flash进行读写操作，不断有如下信息输出，一部分由MTD驱动打印的，另一部分由Flash模拟模块打印，原因早找中。
Chip reports voltage low on erase: status 0xa8
Erase at 0x01100000 failed immediately: errno -5
Flash: can't erase when VPEN low
Chip reports voltage low on erase: status 0xa8
Erase at 0x010c0000 failed immediately: errno -5
Flash: can't erase when VPEN low
Chip reports voltage low on erase: status 0xa8
Erase at 0x01080000 failed immediately: errno -5
Flash: can't erase when VPEN low
… …
三 详细的输出信息（省略了自己加入的打印信息及上面的提到的问题信息）
-bash-2.05b$ cat skyeye.conf
cpu: xscale
mach: pxa_lubbock
mem_bank: map=F, type=RW, addr=0x00000000, size=0x00040000, file=./u-boot.bin, boot=yes
#mem_bank: map=F, type=RW, addr=0x00000000, size=0x00040000
mem_bank: map=F, type=RW, addr=0x00040000, size=0x00100000, file=./zImage
#mem_bank: map=F, type=RW, addr=0x00040000, size=0x00100000
mem_bank: map=F, type=RW, addr=0x00140000, size=0x01ec0000, file=./sitsang_fs.jffs2
mem_bank: map=F, type=RW, addr=0x04000000, size=0x02000000
mem_bank: map=I, type=RW, addr=0x40000000, size=0x0c000000
#mem_bank: map=M, type=RW, addr=0xa0000000, size=0x00200000
#mem_bank: map=M, type=RW, addr=0xa0200000, size=0x00100000
#mem_bank: map=M, type=RW, addr=0xa0200000, size=0x00100000,file=./zImage, boot=yes
#mem_bank: map=M, type=RW, addr=0xa0300000, size=0x00d00000
mem_bank: map=M, type=RW, addr=0xa0000000, size=0x01000000
#mem_bank: map=M, type=RW, addr=0xa0000000, size=0x00008000
#mem_bank: map=M, type=RW, addr=0xa0008000, size=0x00ff8000, file=./piggy
#mem_bank: map=M, type=RW, addr=0xa0008000, size=0x00ff8000, file=../linux-2.6.10/piggy
mem_bank: map=M, type=RW, addr=0xa1000000, size=0x03000000, file=./initrd4M.img
#mem_bank: map=M, type=RW, addr=0xa1800000, size=0x02800000
-bash-2.05b$ ./skyeye-0.8.6-flash.rh9.bin
***************************************************************
**** ****
**** SkyEye Simulator Ver 0.8.6 with GDB 5.3 Interface ****
**** ****
***************************************************************
GNU gdb 5.3
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This SkyEye was configured as "--host=i686-pc-linux-gnu --target=arm-elf".
(SkyEye) tar s
cpu info: xscale, xscale, 69052100, fffffff0, 2
mach info: name pxa_lubbock, mach_init addr 0x8145258
SKYEYE: use xscale mmu ops
Loaded FLASH ./u-boot.bin
Loaded FLASH ./zImage
Loaded FLASH ./sitsang_fs.jffs2
Loaded RAM ./initrd4M.img
0x8248e00
Connected to the simulator.
(SkyEye) r
Starting program:
warning: No executable file specified.
warning: No program loaded.
SKYEYE: xscale_cp15_mcr wrote UNKNOWN - reg 14, reg15 0x698
SKYEYE: xscale_cp15_mcr wrote UNKNOWN - reg 14, reg15 0x69c
SKYEYE: xscale_cp15_mcr wrote UNKNOWN - reg 14, reg15 0x6a0
SKYEYE: cp14_mcr unknown cp14 regs!!!!!!
U-Boot 1.1.2 (Jan 21 2005 - 18:02:07)
U-Boot code: A3080000 -> A309C72C BSS: -> A30D12EC
RAM Configuration:
Bank #0: a0000000 64 MB
Bank #1: a4000000 0 kB
Bank #2: a8000000 0 kB
Bank #3: ac000000 0 kB
Flash: 64 MB
*** Warning - bad CRC, using default environment
Hit any key to stop autoboot: 0
$ flinfo
Bank # 1: INTEL 28F128J3A
Size: 32 MB in 128 Sectors
Sector Start Addresses:
00000000 (RO) 00040000 00080000 000C0000 00100000
00140000 00180000 001C0000 00200000 00240000
00280000 002C0000 00300000 00340000 00380000
003C0000 00400000 00440000 00480000 004C0000
00500000 00540000 00580000 005C0000 00600000
00640000 00680000 006C0000 00700000 00740000
00780000 007C0000 00800000 00840000 00880000
008C0000 00900000 00940000 00980000 009C0000
00A00000 00A40000 00A80000 00AC0000 00B00000
00B40000 00B80000 00BC0000 00C00000 00C40000
00C80000 00CC0000 00D00000 00D40000 00D80000
00DC0000 00E00000 00E40000 00E80000 00EC0000
00F00000 00F40000 00F80000 00FC0000 01000000
01040000 01080000 010C0000 01100000 01140000
01180000 011C0000 01200000 01240000 01280000
012C0000 01300000 01340000 01380000 013C0000
01400000 01440000 01480000 014C0000 01500000
01540000 01580000 015C0000 01600000 01640000
01680000 016C0000 01700000 01740000 01780000
017C0000 01800000 01840000 01880000 018C0000
01900000 01940000 01980000 019C0000 01A00000
01A40000 01A80000 01AC0000 01B00000 01B40000
01B80000 01BC0000 01C00000 01C40000 01C80000
01CC0000 01D00000 01D40000 01D80000 01DC0000
01E00000 01E40000 01E80000 01EC0000 01F00000
01F40000 01F80000 01FC0000
Bank # 2: INTEL 28F128J3A
Size: 32 MB in 128 Sectors
Sector Start Addresses:
04000000 04040000 04080000 040C0000 04100000
04140000 04180000 041C0000 04200000 04240000
04280000 042C0000 04300000 04340000 04380000
043C0000 04400000 04440000 04480000 044C0000
04500000 04540000 04580000 045C0000 04600000
04640000 04680000 046C0000 04700000 04740000
04780000 047C0000 04800000 04840000 04880000
048C0000 04900000 04940000 04980000 049C0000
04A00000 04A40000 04A80000 04AC0000 04B00000
04B40000 04B80000 04BC0000 04C00000 04C40000
04C80000 04CC0000 04D00000 04D40000 04D80000
04DC0000 04E00000 04E40000 04E80000 04EC0000
04F00000 04F40000 04F80000 04FC0000 05000000
05040000 05080000 050C0000 05100000 05140000
05180000 051C0000 05200000 05240000 05280000
052C0000 05300000 05340000 05380000 053C0000
05400000 05440000 05480000 054C0000 05500000
05540000 05580000 055C0000 05600000 05640000
05680000 056C0000 05700000 05740000 05780000
057C0000 05800000 05840000 05880000 058C0000
05900000 05940000 05980000 059C0000 05A00000
05A40000 05A80000 05AC0000 05B00000 05B40000
05B80000 05BC0000 05C00000 05C40000 05C80000
05CC0000 05D00000 05D40000 05D80000 05DC0000
05E00000 05E40000 05E80000 05EC0000 05F00000
05F40000 05F80000 05FC0000
$ cp 00040000 a0200000 00100000
$ go a0200000
Uncompressing Linux.................................................................. done, booting the kernel.
Linux version 2.6.10 ([email protected]) (gcc version 3.3.2) #40 Mon Jan 31 14:01:18 EST 2005
CPU: XScale-PXA250 [69052100] revision 0 (ARMv5TE)
CPU: D VIVT undefined 5 cache
CPU: I cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
CPU: D cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
Machine: Intel DBPXA250 Development Platform (aka Lubbock)
Memory policy: ECC disabled, Data cache writeback
Memory clock: 99.53MHz (*27)
Run Mode clock: 199.07MHz (*2)
Turbo Mode clock: 199.07MHz (*1.0, inactive)
Built 1 zonelists
Kernel command line: root=/dev/ram rw initrd=0xa1000000,0x00800000 console=ttyS0,115200 mem=64M
PID hash table entries: 512 (order: 9, 8192 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 64MB = 64MB total
Memory: 54528KB available (1645K code, 330K data, 96K init)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
checking if image is initramfs...it isn't (bad gzip magic numbers); looks like an initrd
Freeing initrd memory: 8192K
NET: Registered protocol family 16
NetWinder Floating Point Emulator V0.97 (double precision)
JFFS2 version 2.2. (C) 2001-2003 Red Hat, Inc.
ttyS0 at MMIO 0x40100000 (irq = 15) is a FFUART
ttyS1 at MMIO 0x40200000 (irq = 14) is a BTUART
ttyS2 at MMIO 0x40700000 (irq = 13) is a STUART
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
smc91x: not found (-19).
elevator: using anticipatory as default io scheduler
Lubbock configured to boot from ROM (bank 0)
Probing Lubbock Boot ROM at physical address 0x00000000 (32-bit bankwidth)
Lubbock Boot ROM: Found 2 x16 devices at 0x0 in 32-bit bank
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
No RedBoot partition table detected in Lubbock Boot ROM
cmdlinepart partition parsing not available
Probing Lubbock Application Flash at physical address 0x04000000 (32-bit bankwidth)
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
No RedBoot partition table detected in Lubbock Application Flash
cmdlinepart partition parsing not available
Using static partitions on Lubbock Boot ROM
Creating 3 MTD partitions on "Lubbock Boot ROM":
0x00000000-0x00040000 : "Bootloader"
0x00040000-0x00140000 : "Kernel"
0x00140000-0x02000000 : "Filesystem"
Registering Lubbock Application Flash as whole device
pxa2xx_udc: version 14-Dec-2003
gs_bind: Gadget Serial v2.0 bound
gs_module_init: Gadget Serial v2.0 loaded
mice: PS/2 mouse device common for all mice
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 8192)
NET: Registered protocol family 1
RAMDISK: ext2 filesystem found at block 0
RAMDISK: Loading 4096KiB [1 disk] into ram disk... done.
EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended
VFS: Mounted root (ext2 filesystem).
Freeing init memory: 96K
Shell invoked to run file: /bin/init
Command: #!/bin/sh
Command: /etc/rc
Shell invoked to run file: /etc/rc
Command: #!/bin/sh
Command: hostname ARMLinux
Command: mount -t proc proc /proc
Command: mkdir /var/tmp
Command: mkdir /var/log
Command: mkdir /var/run
Command: mkdir /var/lock
Command: cat /etc/motd
Welcome to
_ _____ __ __ _ _
/ \ / __ \ / \_/ \ | | | _ |
/ _ \ | | | | / /\ /\ \ | | _ ____ _ _ _ _
/ / _ \ \ | | __ | | / / \_/ \ \ | | | | _ \ | | | | \ \/ /
/ / ___ \ \ | | __ \ \ | | | | | |___ | | | _ | | | _ | | / \
/_ / \ _ \ | | \ _ \ | _ | | _ | |_____ | | _ | _ | | _ | \____ | \ _ / \ _ /
ARMLinux for Skyeye
For further information check:
http://hpclab.cs.tsinghua.edu.cn/~skyeye/
Execution Finished, Exiting
Command: /bin/sh
Sash command shell (version 1.1.1)
/>
/> cat /proc/mtd
dev: size erasesize name
mtd0: 00040000 00040000 "Bootloader"
mtd1: 00100000 00040000 "Kernel"
mtd2: 01ec0000 00040000 "Filesystem"
mtd3: 02000000 00040000 "Lubbock Application Flash"
/>
/> mount -t jffs2 /dev/mtdblock2 /mnt
/>
/> cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / ext2 rw 0 0
proc /proc proc rw,nodiratime 0 0
/dev/mtdblock2 /mnt jffs2 rw,noatime 0 0
/>ls
bin
dev
etc
home
lib
lost+found
mnt
proc
tmp
usr
var
/>
\>cd /mnt
\>mkdir hello-flash
SR.4 or SR.5 bits set in buffer write (status a800a . Clearing.
SR.4 or SR.5 bits set in buffer write (status 98009. Clearing.
SR.4 or SR.5 bits set in buffer write (status 98009. Clearing.
SR.4 or SR.5 bits set in buffer write (status 98009. Clearing.
SR.4 or SR.5 bits set in buffer write (status 98009. Clearing.
\>ls
bin
dev
etc
hello-flash
home
lib
mnt
opt
proc
rd
root
sbin
sys
tmp
usr
var
\>
四 u-boot-1.1.2 for Lubbock的编译
$tar jxf u-boot-1.1.2.tar.bz2
$make CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux- lubbock_conifg
$make CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux- all
五 linux-2.6.10 for Lubbock的编译
（1）
$tar zxf linux-2.6.10.tar.gz
（2）
$make ARCH=arm CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux- lubbock_defconfig
（3）
$make ARCH=arm CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux- menuconfig
1）选择与MTD相关的选项
采用lubbock_defconfig中默认的MTD选项
2）选择与ramdisk 相关的选项
Block devices --->
x x < > Normal floppy disk support x x
x x < > Loopback device support x x
x x < > Network block device support x x
x x <*> RAM disk support x x
x x (16) Default number of RAM disks x x
x x (4096) Default RAM disk size (kbytes) x x
x x Initial RAM disk (initrd) support x x
x x () Source directory of cpio_list x x
x x < > Packet writing on CD/DVD media x x
x x IO Schedulers --->
（4）
修改linux-2.6.10/.config中的
CONFIG_CMDLINE= “root=/dev/nfs ip=bootp console=ttyS0,115200 mem=64M”
为
CONFIG_CMDLINE=”root=/dev/ram rw initrd=0xa1000000,0x00400000 console=ttyS0,115200 mem=64M”
（5）
$make ARCH=arm CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux-
生成压缩内核Linux-2.6.10/arm/arm/boot/zImage和带调试信息的内核Linux-2.6.10/vmlinux
六 SkyEye调试armlinux内核的方法 |
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