This is for xorg-server support. Currently, xorg-server on loongson need a patch: http://www.gentoo-cn.org/gitweb/?p=loongson;a=blob;f=x11-base/xorg-server/files/xorg-server-1.5.3-loongson.patch;h=9c48b3752b7f14b6603524f46ae832f312e7c6fe;hb=HEAD#l37 Please note that line 37, the last parameter to mmap, which is the ioBase_phys, is hardcoded. This patch no long applies to xorg-server git master. So I took at look at the code trying to find out why. And then I found powerpc has implemented this syscall: pciconfig_iobase Please take a look at the following code: http://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/os-support/linux/lnx_video.c#n517 At the first glance, it is absolutely a good idea to implement this for mips, too. However when I read pciconfig_iobase's manpage, I found this sentence: Most of the interaction with PCI devices is already handled by the kernel PCI layer, and thus these calls should not normally need to be accessed from userspace. So I decided to bring this issue here, so that you guys could give me some advice. Thanks in advance! Zhang, Le
