On Sun, 15 Jul 2007 21:06:27 +0200
Juergen Beisert <[EMAIL PROTECTED]> wrote:
> Replace NSC/Cyrix specific chipset access macros by inlined functions.
> With the 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.
I don't get it. Why would the macros behave differently from inlined
functions?
diff -puN /dev/null include/asm-i386/processor-cyrix.h
> --- /dev/null
> +++ a/include/asm-i386/processor-cyrix.h
> @@ -0,0 +1,20 @@
> +#ifndef __ASM_I386_PROCESSOR_CYRIX_H
> +#define __ASM_I386_PROCESSOR_CYRIX
> +
> +#include <asm/processor-flags.h>
> +/*
> + * NSC/Cyrix CPU indexed register access
> + */
> +static inline u8 getCx86(u8 reg)
> +{
> + outb(reg, 0x22);
> + return inb(0x23);
> +}
> +
> +static inline void setCx86(u8 reg, u8 data)
> +{
> + outb(reg, 0x22);
> + outb(data, 0x23);
> +}
> +
> +#endif
> diff -puN
> include/asm-i386/processor.h~i386-geodes-tsc-is-not-neccessary-to-mark-tu-unstable
> include/asm-i386/processor.h
> ---
> a/include/asm-i386/processor.h~i386-geodes-tsc-is-not-neccessary-to-mark-tu-unstable
> +++ a/include/asm-i386/processor.h
> @@ -168,17 +168,6 @@ static inline void clear_in_cr4 (unsigne
> write_cr4(cr4);
> }
>
> -/*
> - * 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)
> -
> /* Stop speculative execution */
> static inline void sync_core(void)
> {
> diff -puN
> include/asm-x86_64/processor.h~i386-geodes-tsc-is-not-neccessary-to-mark-tu-unstable
> include/asm-x86_64/processor.h
> ---
> a/include/asm-x86_64/processor.h~i386-geodes-tsc-is-not-neccessary-to-mark-tu-unstable
> +++ a/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");
>
-
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