Hello Reinhard,
Reinhard Meyer wrote:
Hello,
after enabling relocation I get the following output:
U-Boot 2010.09-00106-g6e135b9-dirty (Sep 30 2010 - 16:57:43)
U-Boot code: 21F00000 -> 21F3C140 BSS: -> 21F7D700 CPU: AT91SAM9XE Crystal frequency: 18.432 MHz CPU clock : 198.656 MHz Master clock : 99.328 MHz I2C: ready monitor len: 0007D700 <<<< this must be wrong, the binary is short of 256k large ramsize: 04000000 <<<< correct Top of RAM usable for U-Boot at: 24000000 <<<< correct Reserving 501k for U-Boot at: 23f82000 Reserving 143k for malloc() at: 23f5e100 Reserving 24 Bytes for Board Info at: 23f5e0e8 Reserving 88 Bytes for Global Data at: 23f5e090 New Stack Pointer is: 23f5e088 RAM Configuration: Bank #0: 20000000 64 MiB <<< correct relocation Offset is: 02082000 <<<< could be right
<<< system hangs here >>>
Details: initial bootstrap loads u-boot to RAM at 21f00000 (1MiB short of 32 MiB which is the minimum RAM populated)
I have set the following values: #define CONFIG_SKIP_LOWLEVEL_INIT #define CONFIG_SKIP_RELOCATE_UBOOT
With this, your TEXT_BASE must be == relocation address, Probably this is not the case ...
/*#define CONFIG_SYS_ARM_WITHOUT_RELOC*/ #define CONFIG_SYS_NO_ICACHE #define CONFIG_SYS_NO_DCACHE
and
/* SDRAM: min 32, upto 128 MB */ #define CONFIG_NR_DRAM_BANKS 1 #define PHYS_SDRAM 0x20000000 #define PHYS_SDRAM_MAX_SIZE 0x08000000 #define CONFIG_SYS_MEMTEST_START PHYS_SDRAM #define CONFIG_SYS_MEMTEST_END 0x21e00000 #define CONFIG_SYS_LOAD_ADDR (PHYS_SDRAM+0x01000000) /* 16 MB into RAM */ #define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + 0x1000 - CONFIG_SYS_GBL_DATA_SIZE)
and in config.mk:
TEXT_BASE = 0x21f00000
and
int dram_init(void) { gd->ram_size = get_ram_size((void*)PHYS_SDRAM, PHYS_SDRAM_MAX_SIZE); return 0; }
void dram_init_banksize(void) { gd->bd->bi_dram[0].start = PHYS_SDRAM; gd->bd->bi_dram[0].size = get_ram_size((void*)PHYS_SDRAM, PHYS_SDRAM_MAX_SIZE); }
This function is not necessary, because it is equal to the default in arch/arm/lib/board.c
I do probably have a simple misunderstanding of the concept.
- should CONFIG_SKIP_RELOCATE_UBOOT be not defined anymore?
If TEXT_BASE == relocation address it could be defined, never tested.
- TEXT_BASE must be the address where the u-boot is loaded
by 1st loader and startet, right?
Yep.
bye, Heiko