CFI Flash - "NOR chip too large" error on uCLinux

Hi,

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I've got to this piece of code but couldn't find where it's set as well. There are several modules which call this function and as 'map' is a parameter I can't be sure where it's coming from.

Also, i don't get the point. What the mapping is? Is it the memory address space allocated to the device or is it probed or derived from hardware?

It's strange I couldn't find anything about it in the whole internet, is it that unusual to have a 64Mb flash on a board running uCLinux?

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I'm using Ver.2.6.30. So maybe my suggestion is beside the point, but if device's configurations are done in the file 'arch/nios2/kernel/config.c', then please search the text with a keyword 'cfi'. For example

static struct resource nios2_flash_resource = {
# if defined(CFI_FLASH_0_BASE)
	.start = CFI_FLASH_0_BASE,
	.end = CFI_FLASH_0_BASE + CFI_FLASH_0_SPAN - 1,
# else
	.start = EXT_FLASH_BASE,
	.end = EXT_FLASH_BASE + EXT_FLASH_SPAN - 1,
# endif
	.flags = IORESOURCE_MEM,
};

determines the CFI flash memory size by 'CFI_FLASH_0_SPAN' or 'EXT_FLASH_SPAN'. Linux kernel will call a function 'platform_add_devices' with these data and register the devices. Inside this function, a special address space for the device is mapped for its use. Of course the space is different from the main memory one.

Kazu