Dear Albert ARIBAUD,
In message 4CCEF2E4.5080003@free.fr you wrote:
Also, I understand why the second RFC change I did was harmful to tx25. Contrary to u-boot itself, u-boot-spl is not compiled to be position independent; it actually loads at a given address then copies itself, without relocating, to its home location.
It copies _itself_? Not the U-Boot payload?
Heiko, is this intentional? Do we really first load the whole image, then copy the U-Boot payload to some other address, then relocate it to yet another one?
I also think I might have found out what hit tx25.
include/configs/tx25 defines the size of u-boot which SPL will use to load from NAND into RAM. currently it is defined thus:
#define CONFIG_SYS_NAND_U_BOOT_SIZE 0x30000
Arghh...
Wolfgang, please try the following:
- on u-boot-testing, branch reloc_tests, revert commit 7fab02d...
(that's "arm926ejs: fix jump to RAM nand_boot") as this 'fix' is a mistake.
- in include/configs/tx25.h, increasing CONFIG_SYS_NAND_U_BOOT_SIZE to
0x31000
Let me know if building tx25 after these two corrections makes things better.
Bingo.
Both the ELDK and the CS compiled versions run fine now:
with ELDK:
U-Boot 2010.12-rc1-00030-g7fec359 (Nov 01 2010 - 20:13:53)
U-Boot code: 81200000 -> 81224E64 BSS: -> 8122DF68 CPU: Freescale i.MX25 at 399 MHz
monitor len: 0002DF68 ramsize: 02000000 TLB table at: 81ff0000 Top of RAM usable for U-Boot at: 81ff0000 Reserving 183k for U-Boot at: 81fc2000 Reserving 1024k for malloc() at: 81ec2000 Reserving 24 Bytes for Board Info at: 81ec1fe8 Reserving 92 Bytes for Global Data at: 81ec1f8c New Stack Pointer is: 81ec1f88 RAM Configuration: Bank #0: 80000000 32 MiB relocation Offset is: 00dc2000 monitor flash len: 00024E64 Now running in RAM - U-Boot at: 81fc2000 ...
with CS:
U-Boot 2010.12-rc1-00030-g7fec359 (Nov 01 2010 - 20:18:09)
U-Boot code: 81200000 -> 812237E8 BSS: -> 8122C8F0 CPU: Freescale i.MX25 at 399 MHz
monitor len: 0002C8F0 ramsize: 02000000 TLB table at: 81ff0000 Top of RAM usable for U-Boot at: 81ff0000 Reserving 178k for U-Boot at: 81fc3000 Reserving 1024k for malloc() at: 81ec3000 Reserving 24 Bytes for Board Info at: 81ec2fe8 Reserving 92 Bytes for Global Data at: 81ec2f8c New Stack Pointer is: 81ec2f88 RAM Configuration: Bank #0: 80000000 32 MiB relocation Offset is: 00dc3000 monitor flash len: 000237E8 Now running in RAM - U-Boot at: 81fc3000 ...
Note that the CS tool chain gives somewhat smaller code...
Thanks a lot!
Guess we should submit the temporary changes now as formal patches?
Best regards,
Wolfgang Denk