diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 05:20:03 -0400 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 05:20:03 -0400 |
commit | 96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42 (patch) | |
tree | d947a467aa2da3140279617bc4b9b101640d7bf4 /include/asm-x86/processor-cyrix.h | |
parent | 27bd0c955648646abf2a353a8371d28c37bcd982 (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.h | 30 |
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 | |||
20 | static inline u8 getCx86(u8 reg) | ||
21 | { | ||
22 | outb(reg, 0x22); | ||
23 | return inb(0x23); | ||
24 | } | ||
25 | |||
26 | static inline void setCx86(u8 reg, u8 data) | ||
27 | { | ||
28 | outb(reg, 0x22); | ||
29 | outb(data, 0x23); | ||
30 | } | ||