Qin, Laigui (GE EntSol, Security) wrote:
I am facing a MMU related problem when porting Linux to my custom board
with Coldfire M5445x processor. The observation is that* the nand Bus
chip select/WE/RE become 100 times longer than normal when MMU enabled*.
I just can not understand this...
Coldfire is m68k; this list is for powerpc.
Look into my driver codes, I use the virtual address (0xe0000000)
applied from ioremap() kernel function.
136 /* map physical address */
137 this->IO_ADDR_R = this->IO_ADDR_W = ioremap(0x00000000, 1024);
138 if (!this->IO_ADDR_R) {
139 printk(KERN_WARNING "ioremap micron NAND @0x00000000
failed\n");
Is it really at address zero, or is that where your RAM is?
-Scott
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