<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.14.3"> </HEAD> <BODY> Hi all, Finally, got this question fixed. <TT>> --- xc.old/programs/Xserver/hw/xfree86/os-support/linux/lnx_video.c</TT> <TT>> 2005-09-20 02:38:26.000000000 +0800</TT> <TT>> +++ xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_video.c</TT> <TT>> 2006-08-31 18:34:13.000000000 +0800</TT> <TT>> @@ -542,7 +542,7 @@</TT> <TT>> Bool</TT> <TT>> xf86EnableIO(void)</TT> <TT>> {</TT> <TT>> -#if defined(__powerpc__)</TT> <TT>> +#if defined(__powerpc__) || defined(__mips__)</TT> <TT>> int fd;</TT> <TT>> unsigned int ioBase_phys;</TT> <TT>> #endif</TT> <TT>> @@ -582,6 +582,25 @@</TT> <TT>> ioperm(0x40,4,0); /* trap access to the timer chip */</TT> <TT>> ioperm(0x60,4,0); /* trap access to the keyboard controller */</TT> <TT>> # endif</TT> <TT>> +#else</TT> <TT>> +</TT> <TT>> + fd = open("/dev/mem", O_RDWR);</TT> <TT>> + if (IOPortBase == NULL) {</TT> <TT>> + IOPortBase = (volatile unsigned char *)mmap(0, 0x20000,</TT> <TT>> + PROT_READ | PROT_WRITE, MAP_SHARED, fd,</TT> <TT>> + 0x1fd00000);</TT> <TT>> + }</TT> <TT>> + close(fd);</TT> <TT>> +</TT> <TT>> #endif</TT> <TT>> ExtendedEnabled = TRUE;</TT> It is very clear that compiled Xorg with MIPS, IOPortBase hasn't been initialized while it is used by outb() and inb(). Don't know why. Now, Xorg works. On Wed, 2008-03-26 at 23:11 -0400, Michael Lorenz wrote: <BLOCKQUOTE TYPE=CITE> <PRE> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, On Mar 26, 2008, at 22:56, belcon zhao wrote: > Just find that Xorg compiled xf86EnableIO() of hw/xfree86/os- > support/linux/lnx_video.c. IOPortBase wasn't initialized in that > file. That's why IOPortBase is 0. So, it should be compiling > mistake. Did I do extra work while compile Xorg with mips? I don't know about linux but what you need is: - - figure out at which physical address your PCI host bridge puts IO space - - mmap() it, on linux you'd probably use /dev/mem for that - - set IOPortBase accordingly Xorg probably doesn't know about your particular hardware and you didn't give any details either. As far as I can tell the problem isn't MIPS, it's accessing IO space on your machine. On MIPS that would be memory-mapped somewhere. I can't tell you where, you need to figure that out on your own or tell us what exactly you're dealing with. have fun Michael -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) iQEVAwUBR+sQgMpnzkX8Yg2nAQIhbggAkjwL3FgJLM1arnjWOkdzC7+uVJS9zDiQ vFPdr9mcMqryXT+t2h6arg7jzcHDZqgwg2h++ew1/Az1dSKQYxlaZ8ZqPaNL4XD0 lEZ4hRU+m2LnK4CjYWmJlcooX6hUmB2qd7tA6t4zo8J4lUr4gcdp2FSJ/Qxe8yT3 8rWE2/z45WkkogOpznyPBxB0bOghYnwHLwb6Ltq0pPHdCtpfQIThx+LfEQealfwH hkDbtyYfRMJt1Ru5Cpm9PNNl0ZRts34i3VBbxtPdhzAMBibfCbmEzerjGjzlq1Ke 0fhWNH3cHCAQ3R2gxlyXt2api+cNrpKjTdC9nZO5GkIleV0nCUScdQ== =RqnM -----END PGP SIGNATURE----- </PRE> </BLOCKQUOTE> </BODY> </HTML>