tree 154592d3b2e580412bc833eba99c50772e1f13a0
parent 92ed0223aefa795d1873427e25599cb70b2148ee
author Antonino A. Daplas <[EMAIL PROTECTED]> Sat, 30 Jul 2005 12:59:21 -0700
committer Linus Torvalds <[EMAIL PROTECTED]> Sun, 31 Jul 2005 00:14:47 -0700
[PATCH] vesafb: Document mtrr boot option usage
Document mtrr boot option usage to Documentation/fb/vesafb.txt.
Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
Documentation/fb/vesafb.txt | 16 +++++++++++++++-
1 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt
--- a/Documentation/fb/vesafb.txt
+++ b/Documentation/fb/vesafb.txt
@@ -144,7 +144,21 @@ vgapal Use the standard vga registers fo
This is the default.
pmipal Use the protected mode interface for palette changes.
-mtrr setup memory type range registers for the vesafb framebuffer.
+mtrr:n setup memory type range registers for the vesafb framebuffer
+ where n:
+ 0 - disabled (equivalent to nomtrr)
+ 1 - uncachable
+ 2 - write-back
+ 3 - write-combining (default)
+ 4 - write-through
+
+ If you see the following in dmesg, choose the type that matches the
+ old one. In this example, use "mtrr:2".
+...
+mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining
+...
+
+nomtrr disable mtrr
vremap:n
remap 'n' MiB of video RAM. If 0 or not specified, remap memory
-
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