X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-mips%2Firqflags.h;h=af3b07dfad4be2fea39a75522347ac81ed0a8b3f;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=43ca09a3a3d0ca2735b6f0b364c0190cee2569c4;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/include/asm-mips/irqflags.h b/include/asm-mips/irqflags.h
index 43ca09a3a..af3b07dfa 100644
--- a/include/asm-mips/irqflags.h
+++ b/include/asm-mips/irqflags.h
@@ -15,6 +15,27 @@
 
 #include <asm/hazards.h>
 
+/*
+ * CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY does prompt replay of deferred IPIs,
+ * at the cost of branch and call overhead on each local_irq_restore()
+ */
+
+#ifdef CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY
+
+extern void smtc_ipi_replay(void);
+
+#define irq_restore_epilog(flags)				\
+do {								\
+	if (!(flags & 0x0400))					\
+		smtc_ipi_replay();				\
+} while (0)
+
+#else
+
+#define irq_restore_epilog(ignore) do { } while (0)
+
+#endif /* CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY */
+
 __asm__ (
 	"	.macro	raw_local_irq_enable				\n"
 	"	.set	push						\n"
@@ -193,6 +214,7 @@ do {									\
 		: "=r" (__tmp1)						\
 		: "0" (flags)						\
 		: "memory");						\
+	irq_restore_epilog(flags);					\
 } while(0)
 
 static inline int raw_irqs_disabled_flags(unsigned long flags)
@@ -213,12 +235,37 @@ static inline int raw_irqs_disabled_flags(unsigned long flags)
  * Do the CPU's IRQ-state tracing from assembly code.
  */
 #ifdef CONFIG_TRACE_IRQFLAGS
+/* Reload some registers clobbered by trace_hardirqs_on */
+#ifdef CONFIG_64BIT
+# define TRACE_IRQS_RELOAD_REGS						\
+	LONG_L	$11, PT_R11(sp);					\
+	LONG_L	$10, PT_R10(sp);					\
+	LONG_L	$9, PT_R9(sp);						\
+	LONG_L	$8, PT_R8(sp);						\
+	LONG_L	$7, PT_R7(sp);						\
+	LONG_L	$6, PT_R6(sp);						\
+	LONG_L	$5, PT_R5(sp);						\
+	LONG_L	$4, PT_R4(sp);						\
+	LONG_L	$2, PT_R2(sp)
+#else
+# define TRACE_IRQS_RELOAD_REGS						\
+	LONG_L	$7, PT_R7(sp);						\
+	LONG_L	$6, PT_R6(sp);						\
+	LONG_L	$5, PT_R5(sp);						\
+	LONG_L	$4, PT_R4(sp);						\
+	LONG_L	$2, PT_R2(sp)
+#endif
 # define TRACE_IRQS_ON							\
+	CLI;	/* make sure trace_hardirqs_on() is called in kernel level */ \
 	jal	trace_hardirqs_on
+# define TRACE_IRQS_ON_RELOAD						\
+	TRACE_IRQS_ON;							\
+	TRACE_IRQS_RELOAD_REGS
 # define TRACE_IRQS_OFF							\
 	jal	trace_hardirqs_off
 #else
 # define TRACE_IRQS_ON
+# define TRACE_IRQS_ON_RELOAD
 # define TRACE_IRQS_OFF
 #endif