On Friday 14 November 2008, Yuri Tikhonov wrote:
Hello,
Please remove this "Hello," from the commit text next time.
This patch enables support for EXT2, and increases the CONFIG_SYS_BOOTMAPSZ size for the default configuration of the katmai boards to use them as the RAID-reference AMCC setups.
EXT2 enabling allows one to boot kernels from the EXT2 formatted Compact Flash cards.
CONFIG_SYS_BOOTMAPSZ increasing allows one to boot the Linux kernels, which use PAGE_SIZE of 256KB. Otherwise, the memory area with DTB file (which is placed at the end of the bootmap area) will turn out to be overlapped with the BSS segment of the 256KB kernel, and zeroed in early_init() of Linux.
Actually, increasing of the bootmap size could be done via setting of the bootm_size U-Boot variable, but it looks like the current U-Boot implementation have some bootm_size- related functionality lost. In many places through the U-Boot code the CONFIG_SYS_BOOTMAPSZ definition is used directly (instead of trying to read the corresponding value from the environment). The same is truth for the boot_jump_linux() function in lib_ppc/bootm.c, where U-Boot transfers control to Linux passing the CONFIG_SYS_BOOTMAPSZ (not bootm_size) value to the booting kernel.
Signed-off-by: Yuri Tikhonov yur@emcraft.com Signed-off-by: Ilya Yanok yanok@emcraft.com
Applied to 4xx/master. Thanks.
Best regards, Stefan
===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de =====================================================================