diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-01-29 13:54:51 +0000 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-02-01 22:13:25 +0100 |
| commit | 8ac493cd65ea2af5f9b79f7f71edf543b46da112 (patch) | |
| tree | d3ceb7058061c13d6eb897010bcd2d1ef94335bf | |
| parent | fbb0de088b86a0f87e876531b5ae6077cc0ab14c (diff) | |
MIPS: Remove SLOW_DOWN_IO
CONF_SLOWDOWN_IO is never set for any target, so remove the dead code in
the SLOW_DOWN_IO macro. This is done in preparation for changes to
mips_io_port_base which can be avoided in this path by removing it
entirely.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
| -rw-r--r-- | arch/mips/include/asm/io.h | 40 |
1 files changed, 3 insertions, 37 deletions
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h index f71e34231bc..4f9ec194b14 100644 --- a/arch/mips/include/asm/io.h +++ b/arch/mips/include/asm/io.h @@ -26,11 +26,6 @@ #include <spaces.h> /* - * Slowdown I/O port space accesses for antique hardware. - */ -#undef CONF_SLOWDOWN_IO - -/* * Raw operations are never swapped in software. OTOH values that raw * operations are working on may or may not have been swapped by the bus * hardware. An example use would be for flash memory that's used for @@ -72,33 +67,6 @@ static inline void set_io_port_base(unsigned long base) } /* - * Thanks to James van Artsdalen for a better timing-fix than - * the two short jumps: using outb's to a nonexistent port seems - * to guarantee better timings even on fast machines. - * - * On the other hand, I'd like to be sure of a non-existent port: - * I feel a bit unsafe about using 0x80 (should be safe, though) - * - * Linus - * - */ - -#define __SLOW_DOWN_IO \ - __asm__ __volatile__( \ - "sb\t$0,0x80(%0)" \ - : : "r" (mips_io_port_base)); - -#ifdef CONF_SLOWDOWN_IO -#ifdef REALLY_SLOW_IO -#define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; } -#else -#define SLOW_DOWN_IO __SLOW_DOWN_IO -#endif -#else -#define SLOW_DOWN_IO -#endif - -/* * virt_to_phys - map virtual addresses to physical * @address: address to remap * @@ -316,7 +284,7 @@ static inline type pfx##read##bwlq(const volatile void __iomem *mem) \ return pfx##ioswab##bwlq(__mem, __val); \ } -#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p, slow) \ +#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p) \ \ static inline void pfx##out##bwlq##p(type val, unsigned long port) \ { \ @@ -333,7 +301,6 @@ static inline void pfx##out##bwlq##p(type val, unsigned long port) \ BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \ \ *__addr = __val; \ - slow; \ } \ \ static inline type pfx##in##bwlq##p(unsigned long port) \ @@ -346,7 +313,6 @@ static inline type pfx##in##bwlq##p(unsigned long port) \ BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \ \ __val = *__addr; \ - slow; \ \ return pfx##ioswab##bwlq(__addr, __val); \ } @@ -367,8 +333,8 @@ BUILDIO_MEM(l, u32) BUILDIO_MEM(q, u64) #define __BUILD_IOPORT_PFX(bus, bwlq, type) \ - __BUILD_IOPORT_SINGLE(bus, bwlq, type, ,) \ - __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO) + __BUILD_IOPORT_SINGLE(bus, bwlq, type, ) \ + __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p) #define BUILDIO_IOPORT(bwlq, type) \ __BUILD_IOPORT_PFX(, bwlq, type) \ |