From: Meelis Roos <mroos@xxxxxxxx> Date: Thu, 6 Sep 2012 17:41:13 +0300 (EEST) > And here the machine hangs. Debugging printk-s reveal that it does not > find any active I/O port resources and then continues into initializing > the card. Down in igp_read_bios_from_vram() it successfully ioremaps > memory region 0 (vram_base=1ff08000000 and size=40000) and tries to read > 2 bytes from there and hangs on reading bios[0]. Mappings obtained from ioremap() may not be derefenced directly. What you get back from ioremap() isn't a pointer. It's an opaque __iomem cookie, which must only be used via readl() et al. On sparc64 ioremap() happens to return a physical address, that's why this non-portable code crashes. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
