[U-Boot-Users] u-boot flash for yellowstone board with external programmer
Hello, for some reason we need to replace flash chip on yellowstone board and program it with external programmer. The question is that for external programmer flash is visible as 0-64M, and I'm not sure where should I program 512k of u-boot? I assume that at the end of the chip (CPU is looking at the end, at 0xfffffffc),am I right? Also concerning endianness -as board has swapped data and address signals (flash_A0->cpu_A30, flash_D0->cpu_D15) I assume that image can be programmed "as is" - 16-bit word-by-word without any conversion? Please fix me if I'm wrong.
Best regards, Andriy Korud
In message 60E856FD577CC04BA3727AF4122D3F160123856C@3bit.vector.com.pl you wrote:
for some reason we need to replace flash chip on yellowstone board and program it with external programmer. The question is that for external programmer flash is visible as 0-64M, and I'm not sure where should I program 512k of u-boot? I assume that at the end of the chip (CPU is looking at the end, at 0xfffffffc),am I right?
The normale image address for U-Boot on the yelowstone is FFF80000 (flash being mapped ion the FC000000 ... FFFFFFFF area); so if you see 0 ... 64M = 04000000, then you will have to program the image at 0x3F80000
Also concerning endianness -as board has swapped data and address signals (flash_A0->cpu_A30, flash_D0->cpu_D15) I assume that image
There are no swapped signals. Just keep in mind that on PowerPC MSB = Bit 0.
can be programmed "as is" - 16-bit word-by-word without any conversion? Please fix me if I'm wrong.
Right.
Best regards,
Wolfgang Denk
participants (2)
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Andriy Korud -
Wolfgang Denk