Dears, For my ppc405EP based custom board I would like to make few changes to the u-boot memory map, so that every time I update the u-boot, environment variables in the flash remain untouched.
Flash Memory used:S29GL128M(spansion 16MB Flash with 128 uniform sectors of 128KB each)
Current mapping U-Boot Start Flash Address 0xFFF60000 - 2 sectors U-Bot Env Variable Start Addr 0xFFFA000 - 1 sector U-Bot Env Variable(Redundant)Start Addr 0xFFFC000 - 1 sector U-Boot End sector - 1 sector
Size of the binary output of u-boot(u-boot.bin) after build is 128kb*5sectors=648Kbytes.
Current settings in the source tree:
U-boot-1.1.4/include/configs/my_board.h #define CFG_FLASH_BASE 0xFFF60000 #define CFG_MONITOR_BASE CFG_FLASH_BASE #define CFG_MONITOR_LEN (640 * 1024)
#define CFG_ENV_IS_IN_FLASH 1 #define CFG_ENV_ADDR 0xFFFA0000 #define CFG_ENV_SECT_SIZE 0x20000 #define CFG_ENV_ADDR_REDUND 0xFFFC0000 #define CFG_ENV_SIZE_REDUND 0x20000
U-boot-1.1.4/my_board/config.mk TEXT_BASE = 0xFFF60000
U-boot-1.1.4/my_board/u-boot.lds ppcenv_assert = ASSERT(. < 0xFFFA0000, ".bss section too big, overlaps .ppcenv section. Please update your confguration: CFG_MONITOR_BASE, CFG_MONITOR_LEN and TEXT_BASE may need to be modified."); . = 0xFFFA0000; .ppcenv : { common/environment.o(.ppcenv); }
Required mapping: U-Bot Env Variable Start Addr 0xFFF8000 - 1 sector U-Bot Env Variable(Redundant)Start Addr 0xFFFA000 - 1 sector U-Boot Start Flash Address 0xFFFC0000 - 2 sectors
Required Size of the binary output of u-boot(u-boot.bin) after build is 128kb*2sectors=256Kbytes.
I have already tried to modify the above specified files to:
U-boot-1.1.4/include/configs/my_board.h #define CFG_FLASH_BASE 0xFFFC0000 #define CFG_MONITOR_BASE CFG_FLASH_BASE #define CFG_MONITOR_LEN (256 * 1024)
#define CFG_ENV_IS_IN_FLASH 1 #define CFG_ENV_ADDR 0xFFF80000 #define CFG_ENV_SECT_SIZE 0x20000 #define CFG_ENV_ADDR_REDUND 0xFFFA0000 #define CFG_ENV_SIZE_REDUND 0x20000
U-boot-1.1.4/my_board/config.mk TEXT_BASE = 0xFFFC0000
U-boot-1.1.4/my_board/u-boot.lds ppcenv_assert = ASSERT(. < 0xFFF80000, ".bss section too big, overlaps .ppcenv section. Please update your confguration: CFG_MONITOR_BASE, CFG_MONITOR_LEN and TEXT_BASE may need to be modified."); . = 0xFFF80000; .ppcenv : { common/environment.o(.ppcenv); }
But after doing "make all" I get the message ppc_4xx-ld:.bss section too big, overlaps .ppcenv section. Please update your confguration: CFG_MONITOR_BASE, CFG_MONITOR_LEN and TEXT_BASE may need to be modified.
In a simple term, I wanted to build my u-boot by excluding environment variable section of the memory..
Can any one help me?
Where am I going wrong??
Is there any other modification needs to be done other than the above specified changes?
Thanks in advance for your support, With best regards, Albert.