Cleanups.
Ralf Baechle [Thu, 14 Jul 2005 13:25:05 +0000 (13:25 +0000)]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

include/asm-mips/hazards.h

index f63d824..6bd265b 100644 (file)
@@ -148,15 +148,13 @@ __asm__(
 #endif
 
 /*
- * mtc0->mfc0 hazard
- * The 24K has a 2 cycle mtc0/mfc0 execution hazard.
- * It is a MIPS32R2 processor so ehb will clear the hazard.
+ * Interrupt enable/disable hazards
+ * Some processors have hazards when modifying
+ * the status register to change the interrupt state
  */
 
 #ifdef CONFIG_CPU_MIPSR2
-/*
- * Use a macro for ehb unless explicit support for MIPSR2 is enabled
- */
+
 __asm__(
        "       .macro\tirq_enable_hazard                       \n\t"
        "       _ehb                                            \n\t"
@@ -164,19 +162,23 @@ __asm__(
        "                                                       \n\t"
        "       .macro\tirq_disable_hazard                      \n\t"
        "       _ehb                                            \n\t"
+       "       .endm                                           \n\t"
+       "                                                       \n\t"
+       "       .macro\tback_to_back_c0_hazard                  \n\t"
+       "       _ehb                                            \n\t"
        "       .endm");
 
 #define irq_enable_hazard()                                            \
        __asm__ __volatile__(                                           \
-       "_ehb\t\t\t\t# irq_enable_hazard")
+       "irq_enable_hazard")
 
 #define irq_disable_hazard()                                           \
        __asm__ __volatile__(                                           \
-       "_ehb\t\t\t\t# irq_disable_hazard")
+       "irq_disable_hazard")
 
 #define back_to_back_c0_hazard()                                       \
        __asm__ __volatile__(                                           \
-       "_ehb\t\t\t\t# back_to_back_c0_hazard")
+       "back_to_back_c0_hazard")
 
 #elif defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_RM9000)
 
@@ -218,7 +220,7 @@ __asm__(
 #define irq_enable_hazard()    do { } while (0)
 #define irq_disable_hazard()                                           \
        __asm__ __volatile__(                                           \
-       "_ssnop; _ssnop; _ssnop;\t\t# irq_disable_hazard")
+       "irq_disable_hazard")
 
 #define back_to_back_c0_hazard()                                       \
        __asm__ __volatile__(                                           \