If you want to include support for linear addressing into the server binaries, you have to define
#define HasSVR3mmapDrv YESin xf86site.def. This is necessary to get the correct setup to be defined for the build.
You need the mmap-2.2.3 driver installed on your system. If you don't have the mmap-2.2.3 driver installed, you could use the driver source in the file
xc/programs/Xserver/hw/xfree86/etc/mmapSVR3.sharBuild and install the driver as instructed. You'll need the file /usr/include/sys/mmap.h for compiling the X11R6/XFree86 source tree, with linear addressing enabled.
To use the linear address-mapping of the framebuffer you need the mmap Driver by Thomas Wolfram (Version 2.2.3) installed in your Kernel. If you have installed it, most servers will use linear addressing by default. Others may require setting the
Option "linear"in your XF86Config. Check the appropriate manual pages for details. Maybe you need also the MemBase specified in XF86Config. Please refer to the appropriate README of your Card/Server, for How to use... Note that the P9000 server will not work at all unless linear addressing is available.
I could only test two cards against the linear addressing.
with 32MB MainMemory installed I couldn't use it. My tests with different mappings into the address space results in no Graphics displayed or a spontaneous reboot.
with 32MB MainMemory installed I could map the CardMemory at MemBase 0x06400000 ~ 100MB. I could work with all clients until I try to activate a Motif 1.1.1 InputField inside a Motif Client like Mosaic-2.4 or xplan. This results in a crash of the XServer.
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