Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0b6249567b4ecf6e9d5a8efcf149f3e7cf788cc0
Commit: 0b6249567b4ecf6e9d5a8efcf149f3e7cf788cc0
Parent: d725cf3818b12a17d78b87a2de19e8eec17126ae
Author: Chris Dearman <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 16:09:13 2007 +0100
Committer: Ralf Baechle <[EMAIL PROTECTED]>
CommitDate: Fri May 11 14:28:31 2007 +0100
[MIPS] FPU hazard handling
Move FPU hazard handling to hazards.h and provide proper support for
MIPSR2 processors
Signed-off-by: Chris Dearman <[EMAIL PROTECTED]>
Signed-off-by: Ralf Baechle <[EMAIL PROTECTED]>
---
include/asm-mips/fpu.h | 23 +++--------------------
include/asm-mips/hazards.h | 32 ++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+), 20 deletions(-)
diff --git a/include/asm-mips/fpu.h b/include/asm-mips/fpu.h
index b414a7d..483685b 100644
--- a/include/asm-mips/fpu.h
+++ b/include/asm-mips/fpu.h
@@ -16,6 +16,7 @@
#include <asm/mipsregs.h>
#include <asm/cpu.h>
#include <asm/cpu-features.h>
+#include <asm/hazards.h>
#include <asm/bitops.h>
#include <asm/processor.h>
#include <asm/current.h>
@@ -38,34 +39,16 @@ extern void _init_fpu(void);
extern void _save_fp(struct task_struct *);
extern void _restore_fp(struct task_struct *);
-#if defined(CONFIG_CPU_SB1)
-#define __enable_fpu_hazard() \
-do { \
- asm(".set push \n\t" \
- ".set mips64 \n\t" \
- ".set noreorder \n\t" \
- "ssnop \n\t" \
- "bnezl $0, .+4 \n\t" \
- "ssnop \n\t" \
- ".set pop"); \
-} while (0)
-#else
-#define __enable_fpu_hazard() \
-do { \
- asm("nop;nop;nop;nop"); /* max. hazard */ \
-} while (0)
-#endif
-
#define __enable_fpu() \
do { \
set_c0_status(ST0_CU1);
\
- __enable_fpu_hazard(); \
+ enable_fpu_hazard(); \
} while (0)
#define __disable_fpu()
\
do { \
clear_c0_status(ST0_CU1); \
- /* We don't care about the c0 hazard here */ \
+ disable_fpu_hazard(); \
} while (0)
#define enable_fpu() \
diff --git a/include/asm-mips/hazards.h b/include/asm-mips/hazards.h
index e50c77e..1542f23 100644
--- a/include/asm-mips/hazards.h
+++ b/include/asm-mips/hazards.h
@@ -178,4 +178,36 @@ ASMMACRO(back_to_back_c0_hazard,
#endif
+
+/* FPU hazards */
+
+#if defined(CONFIG_CPU_SB1)
+ASMMACRO(enable_fpu_hazard,
+ .set push;
+ .set mips64;
+ .set noreorder;
+ _ssnop;
+ bnezl $0,.+4;
+ _ssnop
+ .set pop
+)
+ASMMACRO(disable_fpu_hazard,
+)
+
+#elif defined(CONFIG_CPU_MIPSR2)
+ASMMACRO(enable_fpu_hazard,
+ _ehb
+)
+ASMMACRO(disable_fpu_hazard,
+ _ehb
+)
+#else
+ASMMACRO(enable_fpu_hazard,
+ nop; nop; nop; nop
+)
+ASMMACRO(disable_fpu_hazard,
+ _ehb
+)
+#endif
+
#endif /* _ASM_HAZARDS_H */
-
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