Still have questions, thanks ahead!
According to DATASHEET
"BMS -
Boot memory space. Defines the initial value for BR0[BA]. There are two possible bootmemory regions, HIMEM and LOMEM 0 0xFE00_0000 -- 0xFFFF_FFFF 1 0x0000_0000 -- 0x1FFF_FFFF "
1) So if let BMS=0, - Does this mean the BR0[BA] have the exact address of 0xFE00_00000
or - Does this mean the BR0[BA] could be one of the address between range 0XFE00_00000 and 0xFFFF_FFFFF, if this is the case, so how can i determine the specific value of BR0[BA]?
2) With BMS=0 and CIP=0
According to the datasheet,
BR0[BA] = 0xFE00_0000 (Right?) START_VECTOR = 0xFFF0_0100
The span is START_VECTOR-BR0[BA] = 0xFFF0_0100 - 0xFE00_0000 = 0x1F00100 > 16M, So if my flash is 8M bytes, i can't use this configuration, right?
3) I pull-down the RSTCONF, it doesn't work, only with BDI2000 attached and config-file from BDI2000 (RSTCONF up of cuz), U-BOOT can start correctly. I.e.
Thanks ahead!
Best Regards Raymond
So With BMS=0, and CIP=0, my flash should be
bigger
than 0xFFFn_nnnn - 0xFE00_00000 > 16M, right?
No. It just narrows your choose scope. If your FLASH on board hasn't reached 32MByte, you can fit the whole
--- Sam Song samsongshu@yahoo.com.cn wrote:
raymond yang raymond_yang95134@yahoo.com wrote:
- Given BMS = 0
Does this mean, the FLASH(on CS0) are given the
base
address as 0xFE00_0000?
Not exactly. 0xFE00_0000 is just one of workable configuration.
- Given CIP = 0
Does this meman, the vector should be placed at 0xFFFn_nnnn?
Correct. This is HIGH BOOT location of 8272.
So With BMS=0, and CIP=0, my flash should be
bigger
than 0xFFFn_nnnn - 0xFE00_00000 > 16M, right?
No. It just narrows your choose scope. If your FLASH on board hasn't reached 32MByte, you can fit the whole FLASH space in the setting scope as you like.
- Given my flash is 8M byte, 16bit-bus-width, is
it
a valid HRCW word for 08_82_32_45 My image got the following configurations MONITOR_BASE=TEXT_ADDR=0xFFF00000 CFG_FLASH_BASE = 0XFE800000
Seems good. But CFG_FLASH_BASE = 0xff800000 is also OK.
I tried many times, with BDI plugged, u-boot works fine.However, without BDI and RSTCN pull-up, looks
like the image never got run.
Ummm, try to program the same image at 0xff800000 and pull down RSTCN to see what would happen:-)
Best regards,
Sam
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