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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2008-03-18 17:47:56 -0400
committerRalf Baechle <ralf@linux-mips.org>2008-07-15 13:44:32 -0400
commit7a2852e49fe2d19296812c0f0f833b0ee3043bbb (patch)
treeecee76f7532b5478109d4ee38b7da93522c3084c /include/asm-mips
parentc3dd3de789630b9b1ac8f5175f1c21bbf1cca939 (diff)
[MIPS] IP28: switch to "normal" mode after PROM no longer needed
SGI-IP28 is running in so called slow mode, when kernel is started from the PROM. PROM calls must be done in slow mode otherwise the PROM will issue an error. To get better memory performance we now switch to normal mode, when the PROM is no longer needed. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
-rw-r--r--include/asm-mips/barrier.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-mips/barrier.h b/include/asm-mips/barrier.h
index 9d8cfbb5e796..8e9ac313ca3b 100644
--- a/include/asm-mips/barrier.h
+++ b/include/asm-mips/barrier.h
@@ -92,11 +92,25 @@
92#define fast_wmb() __sync() 92#define fast_wmb() __sync()
93#define fast_rmb() __sync() 93#define fast_rmb() __sync()
94#define fast_mb() __sync() 94#define fast_mb() __sync()
95#ifdef CONFIG_SGI_IP28
96#define fast_iob() \
97 __asm__ __volatile__( \
98 ".set push\n\t" \
99 ".set noreorder\n\t" \
100 "lw $0,%0\n\t" \
101 "sync\n\t" \
102 "lw $0,%0\n\t" \
103 ".set pop" \
104 : /* no output */ \
105 : "m" (*(int *)CKSEG1ADDR(0x1fa00004)) \
106 : "memory")
107#else
95#define fast_iob() \ 108#define fast_iob() \
96 do { \ 109 do { \
97 __sync(); \ 110 __sync(); \
98 __fast_iob(); \ 111 __fast_iob(); \
99 } while (0) 112 } while (0)
113#endif
100 114
101#ifdef CONFIG_CPU_HAS_WB 115#ifdef CONFIG_CPU_HAS_WB
102 116