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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 05:20:03 -0400
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 05:20:03 -0400
commit96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42 (patch)
treed947a467aa2da3140279617bc4b9b101640d7bf4 /include/asm-x86/processor-cyrix.h
parent27bd0c955648646abf2a353a8371d28c37bcd982 (diff)
i386/x86_64: move headers to include/asm-x86
Move the headers to include/asm-x86 and fixup the header install make rules Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/processor-cyrix.h')
-rw-r--r--include/asm-x86/processor-cyrix.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-x86/processor-cyrix.h b/include/asm-x86/processor-cyrix.h
new file mode 100644
index 000000000000..97568ada1f97
--- /dev/null
+++ b/include/asm-x86/processor-cyrix.h
@@ -0,0 +1,30 @@
1/*
2 * NSC/Cyrix CPU indexed register access. Must be inlined instead of
3 * macros to ensure correct access ordering
4 * Access order is always 0x22 (=offset), 0x23 (=value)
5 *
6 * When using the old macros a line like
7 * setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x88);
8 * gets expanded to:
9 * do {
10 * outb((CX86_CCR2), 0x22);
11 * outb((({
12 * outb((CX86_CCR2), 0x22);
13 * inb(0x23);
14 * }) | 0x88), 0x23);
15 * } while (0);
16 *
17 * which in fact violates the access order (= 0x22, 0x22, 0x23, 0x23).
18 */
19
20static inline u8 getCx86(u8 reg)
21{
22 outb(reg, 0x22);
23 return inb(0x23);
24}
25
26static inline void setCx86(u8 reg, u8 data)
27{
28 outb(reg, 0x22);
29 outb(data, 0x23);
30}