i writed a led driver for PQ2FADS(a ppc board). but i can't read/write 0x04500000 where led register addr locate in. i tested two ways to do that. first, p=0x04500000; *p=0x12; .... second, outb(0x12,0x04500000); ... two ways both didn't work.they had a some wrong:kernel access of bad area. how can i know which area is bad area or good area? and what can i do next? thanks.
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