skyeye下修改uboot支持2410从nand启动

creatorwu 发表于 2008-1-29 20:42:13

creator [email protected]

我的2440开发板没有norflash，是从nand引导的，但是扬创不提供U-BOOT的源代码，
所以决定移植一个，但是一直因为没有一个很好的调试方法。一直没有完成。最近看到
skyeye支持nand启动，同时支持u-boot。随决定移植一下，目前初期阶段是移植2410的
版本，ok之后再移植2440的版本。
我上一篇《在cygwin下面用skyeye调试u-boot》有写u-boot需要下载1.1.4版本或
1.1.2版本的。我采用的是1.1.4版本。主要修改如下几个地方：
以下参考（U-BOOT FOR 阳初2410 v2.3 BY wmmwang 8/29/2007），我本来写了
，是直接copy 2440的，我以为一样的，结果吃了大亏，nand寄存器不一样，搞的我很烦，
怪自己啊。

1、在cpu/arm920t/start.s中修改如下：
#define STACK_BASE 0x33f00000
#define STACK_SIZE 0x8000
DW_STACK_START:
.word STACK_BASE+STACK_SIZE-4

#ifndef CONFIG_SKIP_RELOCATE_UBOOT
relocate: /* relocate U-Boot to RAM    */
adr r0, _start /* r0 <- current position of code */
ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
cmp r0, r1                /* don't reloc during debug       */
beq stack_setup

@ ldr r2, _armboot_start
@ ldr r3, _bss_start
@ sub r2, r3, r2 /* r2 <- size of armboot          */
@ add r2, r0, r2 /* r2 <- source end address       */

@copy_loop:
@ ldmia r0!, {r3-r10} /* copy from source address */
@ stmia r1!, {r3-r10} /* copy to target address */
@ cmp r0, r2 /* until source end addreee */
@ ble copy_loop

#ifdef CONFIG_S3C2410_NAND_BOOT
bl copy_myself
#endif /*CONFIG_S3C2410_NAND_BOOT*/

#endif /*CONFIG_SKIP_RELOCATE_UBOOT*/
……
……
……
/**************************************************************************
*
* copy u-boot to ram
*
*************************************************************************
*/
#ifdef CONFIG_S3C2410_NAND_BOOT
@
@ copy_myself: copy u-boot to ram
@
copy_myself:
mov r10, lr

@ reset NAND
mov r1, #NAND_CTL_BASE
ldr r2, =0xf830 @ initial value
str r2,
ldr r2,
bic r2, r2, #0x800 @ enable chip
str r2,
mov r2, #0xff @ RESET command
strb r2,
mov r3, #0 @ wait
1: add r3, r3, #0x1
cmp r3, #0xa
blt 1b
2: ldr r2, @ wait ready
tst r2, #0x1
beq 2b
ldr r2,
orr r2, r2, #0x800 @ disable chip
str r2,

@ get read to call C functions
ldr sp, DW_STACK_START @ setup stack pointer
mov fp, #0 @ no previous frame, so fp=0

@ copy UBOOT to RAM
ldr r0, _TEXT_BASE
mov r1, #0x0
mov r2, #0x20000
bl nand_read_ll

teq r0, #0x0
beq ok_nand_read

bad_nand_read:
1: b 1b @ infinite loop

ok_nand_read:

@ verify

mov r0, #0
ldr r1, _TEXT_BASE
mov r2, #0x400 @ 4 bytes * 1024 = 4K-bytes
go_next:
ldr r3, , #4
ldr r4, , #4
teq r3, r4
bne notmatch
subs r2, r2, #4
beq done_nand_read
bne go_next
notmatch:
1: b 1b
done_nand_read:

mov pc, r10

#endif
@ CONFIG_S3C2440_NAND_BOOT

3、在board/smdk2410/中添加nand_read.c文件：
#include <config.h>
#include "linux/mtd/mtd.h"
#include "linux/mtd/nand.h"

//#define LARGEPAGE_FLASH

#define __REGb(x) (*(volatile unsigned char *)(x))
#define __REGi(x) (*(volatile unsigned int *)(x))
#define NF_BASE 0x4e000000
#define NFCONF __REGi(NF_BASE + 0x0)
#define NFCMD __REGb(NF_BASE + 0x4)
#define NFADDR __REGb(NF_BASE + 0x8)
#define NFDATA __REGb(NF_BASE + 0xc)
#define NFSTAT __REGb(NF_BASE + 0x10)

#define BUSY 1
inline void wait_idle(void) {
int i;

while(!(NFSTAT & BUSY))
   for(i=0; i<10; i++);
}

#ifndef LARGEPAGE_FLASH
#define NAND_SECTOR_SIZE    512
#else
#define NAND_SECTOR_SIZE    2048
#endif
#define NAND_BLOCK_MASK       (NAND_SECTOR_SIZE - 1)

/* low level nand read function */
int
nand_read_ll(unsigned char *buf, unsigned long start_addr, int size)
{
int i, j;

if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)){
//if ((start_addr & NAND_BLOCK_MASK) /*|| (size > SZ_1M)*/) {
   return -1;    /* invalid alignment */
}

/* chip Enable */
NFCONF &= ~0x800;
for(i=0; i<10; i++);

for(i=start_addr; i < (start_addr + size);) {
   /* READ0 */
   NFCMD = NAND_CMD_READ0;

   /* Write Address */
#ifndef LARGEPAGE_FLASH
   NFADDR = i & 0xff;
   NFADDR = (i >> 9) & 0xff;
   NFADDR = (i >> 17) & 0xff;
   NFADDR = (i >> 25) & 0xff;
#else
   NFADDR = i & 0xff;
   NFADDR = (i >> 8) & 0x07;
   NFADDR = (i >> 11) & 0xff;
   NFADDR = (i >> 19) & 0xff;
   NFADDR = (i >> 27) & 0x3;

   NFCMD = NAND_CMD_READSTART;
#endif
   wait_idle();

   for(j=0; j < NAND_SECTOR_SIZE; j++) {
   *buf = (NFDATA & 0xff);
   buf++;
   }
   i += NAND_SECTOR_SIZE;
}

/* chip Disable */
NFCONF |= 0x800; /* chip disable */

return 0;
}
4、修改board/smdk2410/Makefile：
COBJS := smdk2410.o flash.o nand_read.o //添加nand_read.o

编译就可以了。

以下是采用skyeye进行调试。
首先是生成nand.dump文件。
在skyeye-1.2.4\device\nandflash\tools下面有个mknandflashdump.c。
在cygwin下面编译 gcc mknandflashdump.c 生成a.exe
copy 刚才生成的u-boot.bin
执行./a.exe u-boot.bin nand.dump 0x0
就生成了nand.dump了。

修改skyeye.conf文件：
# skyeye config file for S3C2410X

cpu: arm920t
mach: s3c2410x

# physical memory
mem_bank: map=M, type=RW, addr=0x00000000, size=0x00004000, file=./u-boot.bin,boot=yes
mem_bank: map=M, type=RW, addr=0x30000000, size=0x04000000
#mem_bank: map=M, type=RW, addr=0xC0000000, size=0x04000000,file=./vmlinux
#mem_bank: map=M, type=RW, addr=0x30000000, size=0x03F80000
#mem_bank: map=M, type=RW, addr=0x33F80000, size=0x00080000, file=./u-boot.bin,boot=yes
#mem_bank: map=M, type=RW, addr=0xc1000000, size=0x01000000

# all peripherals I/O mapping area
mem_bank: map=I, type=RW, addr=0x48000000, size=0x20000000

mem_bank: map=I, type=RW, addr=0x19000300, size=0x00000020
#net: type=cs8900a, base=0x19000300, size=0x20,int=9, mac=08:00:3E:26:0A:5B, ethmod=tuntap, hostip=10.0.0.1
nandflash: type=s3c2410x,name=K9F1208U0B,dump=./nand.dump
#lcd: type=s3c2410x, mod=gtk
dbct:state=on

cygwin下面输入：skyeye 就ok。
注：我在copy_myself之后有个验证一直不通过，目前还在测试中。
后续我再改改
下一步：
移植到2440中，目前好像skyeye不支持2440 nand启动，看是否可以修改一下skyeye。
再下一步：
移植ecos到2440，当然也是在skyeye模拟、
先用skyeye模拟。
发现skyeye真是个好软件，特别是在bootloader移植和操作系统移植。

ksh 发表于 2008-1-31 12:48:24

Great contribution! I will add it to skyeye wiki document. If someone can translate your document into an engish version. That will be useful for some foreigners.....

There is also some instructions related to nand flash.
http://lists.gro.clinux.org/pipermail/skyeye-developer/2007-September/001517.html

Could you read/write nand flash in 2410 linux of skyeye?? I mean to use nand flash driver provided by linux to do something.

I ever tried ecos of at91 and 2410 on SkyEye.But not succeed to run them. Anyway , I am not familar with eCos internals.

shinety53 发表于 2008-5-1 15:58:26

终于在lz你的方法下执行成功了。。。。。。好无语阿，就这个nand就弄了几天。
不为什么结果是这样的呢？
shinety@shinety:~/arm/rom6$ sudo skyeye -e u-boot
big_endian is false.
arch: arm
cpu info: armv4, arm920t, 41009200, ff00fff0, 2
mach info: name s3c2410x, mach_init addr 0x805f420
nandflash: dump ./nand.dump
file size:69206016
dbct info: Note: DBCT not compiled in. This option will be ignored
uart_mod:0, desc_in:, desc_out:, converter:
SKYEYE: use arm920t mmu ops
Loaded RAM ./u-boot.bin
start addr is set to 0x33f80000 by exec file.
ERROR: s3c2410x_io_write_word(0x4c000000) = 0x00ffffff
ERROR: s3c2410x_io_write_word(0x4c000008) = 0x00048032

U-Boot 1.1.6 (May1 2008 - 15:51:07)

DRAM:64 MB
Flash: 512 kB
*** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
ERROR: s3c2410x_io_write_word(0x1900030a) = 0x00000000
SMDK2410 #
+Stopped sudo skyeye -e u-boot
shinety@shinety:~/arm/rom6$ sudo skyeye

**************************** WARNING **********************************
If you want to run ELF image, you should use -e option to indicate
your elf-format image filename. Or you only want to run binary image,
you need to set the filename of the image and its entry in skyeye.conf.
***********************************************************************

big_endian is false.
arch: arm
cpu info: armv4, arm920t, 41009200, ff00fff0, 2
mach info: name s3c2410x, mach_init addr 0x805f420
nandflash: dump ./nand.dump
file size:69206016
dbct info: Note: DBCT not compiled in. This option will be ignored
uart_mod:0, desc_in:, desc_out:, converter:
SKYEYE: use arm920t mmu ops
Loaded RAM ./u-boot.bin

+Stopped sudo skyeye

执行sudo skyeye会在 Loaded RAM ./u-boot.bin停下来了呢？
而sudo skyeye -e u-boot却不成功呢？

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skyeye下修改uboot支持2410从nand启动