Merge remote-tracking branch 'lsk/v3.10/topic/gator' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / arch / arm64 / include / asm / irqflags.h

diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h
index aa11943b850213c77a32f87c1ce22c8aac87bf83..0ed52c691868ee5aa6a67390d7f7afa1b52b5bb7 100644 (file)
--- a/arch/arm64/include/asm/irqflags.h
+++ b/arch/arm64/include/asm/irqflags.h
@@ -87,5 +87,28 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
        return flags & PSR_I_BIT;
 }
 
+/*
+ * save and restore debug state
+ */
+#define local_dbg_save(flags)                                          \
+       do {                                                            \
+               typecheck(unsigned long, flags);                        \
+               asm volatile(                                           \
+               "mrs    %0, daif                // local_dbg_save\n"    \
+               "msr    daifset, #8"                                    \
+               : "=r" (flags) : : "memory");                           \
+       } while (0)
+
+#define local_dbg_restore(flags)                                       \
+       do {                                                            \
+               typecheck(unsigned long, flags);                        \
+               asm volatile(                                           \
+               "msr    daif, %0                // local_dbg_restore\n" \
+               : : "r" (flags) : "memory");                            \
+       } while (0)
+
+#define local_dbg_enable()     asm("msr        daifclr, #8" : : : "memory")
+#define local_dbg_disable()    asm("msr        daifset, #8" : : : "memory")
+
 #endif
 #endif