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authorJuergen Beisert <juergen@kreuzholzen.de>2007-07-22 11:12:38 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-22 11:03:38 -0700
commitf25f64ed5bd3c2932493681bdfdb483ea707da0a (patch)
tree17d5151d79cbb0b53ddde80157950a2788ac947f /include/asm-x86_64
parentbdda1561ffda764583a295229db66d94cf6038a3 (diff)
downloadlinux-f25f64ed5bd3c2932493681bdfdb483ea707da0a.tar.gz
x86: Replace NSC/Cyrix specific chipset access macros by inlined functions.
Due to index register access ordering problems, when using macros a line like this fails (and does nothing): setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x88); With inlined functions this line will work as expected. Note about a side effect: Seems on Geode GX1 based systems the "suspend on halt power saving feature" was never enabled due to this wrong macro expansion. With inlined functions it will be enabled, but this will stop the TSC when the CPU runs into a HLT instruction. Kernel output something like this: Clocksource tsc unstable (delta = -472746897 ns) This is the 3rd version of this patch. - Adding missed arch/i386/kernel/cpu/mtrr/state.c Thanks to Andres Salomon - Adding some big fat comments into the new header file Suggested by Andi Kleen AK: fixed x86-64 compilation Signed-off-by: Juergen Beisert <juergen@kreuzholzen.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/processor.h11
1 files changed, 0 insertions, 11 deletions
diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h
index a1645bbc03b..19525175b91 100644
--- a/include/asm-x86_64/processor.h
+++ b/include/asm-x86_64/processor.h
@@ -389,17 +389,6 @@ static inline void prefetchw(void *x)
#define cpu_relax() rep_nop()
-/*
- * NSC/Cyrix CPU indexed register access macros
- */
-
-#define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); })
-
-#define setCx86(reg, data) do { \
- outb((reg), 0x22); \
- outb((data), 0x23); \
-} while (0)
-
static inline void serialize_cpu(void)
{
__asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");