[U-Boot-Users] [T-Engine] UBoot configuration for T-Engine/SH7727 MS7727CP02 DevKit

[Nobuhiro Iwamatsu]

Hi, thaoth .

2008/8/7 thaoth <thaoth at cybersoft-vn.com>:

> Here is configuration of UBoot
> \board\ms7727se\config.mk :            TEXT_BASE = 0x8DFC0000
> \board\ms7727se\u-boot.lds
>
> OUTPUT_FORMAT("elf32-sh-tkernel", "elf32-sh-tkernel", "elf32-sh-tkernel")
> SECTIONS
> {
>        . = 0x8C000000 + (32*1024*1024) - (256*1024);
>
> \include\configs\ms7727se.h
> /* MEMORY */
> #define MS7720SE_SDRAM_BASE             0x8C000000
> #define MS7720SE_FLASH_BASE_1           0x80000000 //0xA0000000
> #define MS7720SE_FLASH_BANK_SIZE        (8 * 1024 * 1024)
>
> #define CFG_MEMTEST_START       MS7720SE_SDRAM_BASE
> #define CFG_MEMTEST_END         (CFG_MEMTEST_START + (60 * 1024 * 1024))
>
> #define CFG_SDRAM_BASE          MS7720SE_SDRAM_BASE
> #define CFG_SDRAM_SIZE          (32 * 1024 * 1024)
>
> #define CFG_LOAD_ADDR           (CFG_SDRAM_BASE + 32 * 1024 * 1024)
> #define CFG_MONITOR_BASE        MS7720SE_FLASH_BASE_1
> #define CFG_MONITOR_LEN         (128 * 1024)
> #define CFG_MALLOC_LEN          (256 * 1024)
> #define CFG_GBL_DATA_SIZE       256
> #define CFG_BOOTMAPSZ           (8 * 1024 * 1024)
>
>
> /* FLASH */
> #define CFG_FLASH_CFI
> #define CFG_FLASH_CFI_DRIVER
> #undef  CFG_FLASH_QUIET_TEST
> #define CFG_FLASH_EMPTY_INFO    /* print 'E' for empty sector on flinfo */
>
> #define CFG_FLASH_BASE          MS7720SE_FLASH_BASE_1
>
>
>
> Would you please help me have a look this setting?
> 1. Is this setting correct ? I am confusing about TEXT_BASE with
> CFG_LOAD_ADDR. Here is definition
> - CFG_FLASH_BASE:
>                Physical start address of Flash memory.
>
> - CFG_MONITOR_BASE:
>                Physical start address of boot monitor code (set by
>                make config files to be same as the text base address
>                (TEXT_BASE) used when linking) - same as
>                CFG_FLASH_BASE when booting from flash.

Yes, you are right.
If you use *make config_xx ; make* , you can make an u-boot.srec file starting
from the memory (May be address is 0x8DFC000).

I think that you know it, T-engine has a monitor program.
The T-engine user uses this monitor program and writes in it at a flash bulb.
However, as for this program, only a SREC file is usable.

If you want make SREC file to Flash, you need to use objcopy command.
shX-linux-objcopy -Ibinary -Osrec u-boot.bin u-boot.flash.srec
Please check doc/README.sh.

>
> If I am wrong, please tell me how to correct these setting.
>
> 2. "ld" T-Engine toolchain only supports elf32-sh-tkernel target, but
> reference implementation (example) tell "elf32-sh-linux" is expected target.
> Is the setting correct?
>
> \board\ms7727se\u-boot.lds
> Original :
> OUTPUT_FORMAT("elf32-sh-linux", "elf32-sh-linux", "elf32-sh-linux")
> -> My changes
> OUTPUT_FORMAT("elf32-sh-tkernel", "elf32-sh-tkernel", "elf32-sh-tkernel")

Hmmm, I have not used the tool-chain for t-kernel.
However, as for me, there is an acquaintance using t-kernel.
I can ask him. And, I will reply about this matter.

>
>
> I am newbie in embedded system. I am appreciating your helping.
> Thank you a lot.

I think that I want to support t-kernel and other OS to U-boot-sh.
I cooperate with you.

Best regards,
 Nobuhiro