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Moving memory map of Linux on M5485evb based board
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James Kimble
Oct 7, 2007, 11:56:10 AM10/7/07
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I'm attempting to port a Linux BSP distributed with the M5485evb board
to a custom board based on the same hardware. The primary difference
between the boards is the memory map and the flash chips. The
Freescale (I should say Logic, who makes the board) board has SDRAM
starting at address 0x0 and FLASH at 0xF0000000. My board has Flash
starting at address 0x0 and SDRAM starting at 0x30000000. I've ported
Colilo and am able
to initialize everything (RAM, FLASH, serial ports, console, Ethernet)
but Linux will not boot (doesn't fail, just nothing). I've adjusted
the SDRAM_BASE and FLASH_BASE parameters in the kernel code but still
no luck.
Can anyone give me some idea what might be going wrong here? Is it
easy to move Linux
around in memory or does everyone leave it at 0x0 just because?
to a custom board based on the same hardware. The primary difference
between the boards is the memory map and the flash chips. The
Freescale (I should say Logic, who makes the board) board has SDRAM
starting at address 0x0 and FLASH at 0xF0000000. My board has Flash
starting at address 0x0 and SDRAM starting at 0x30000000. I've ported
Colilo and am able
to initialize everything (RAM, FLASH, serial ports, console, Ethernet)
but Linux will not boot (doesn't fail, just nothing). I've adjusted
the SDRAM_BASE and FLASH_BASE parameters in the kernel code but still
no luck.
Can anyone give me some idea what might be going wrong here? Is it
easy to move Linux
around in memory or does everyone leave it at 0x0 just because?
Any help would be GREATLY APPRECIATED!!
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