ARCv2: SMP: Emulate IPI to self using software triggered interrupt

[firefly-linux-kernel-4.4.55.git] / arch / arc / include / asm / irqflags-arcv2.h

diff --git a/arch/arc/include/asm/irqflags-arcv2.h b/arch/arc/include/asm/irqflags-arcv2.h
index 258b0e5ad3329a614e59204df55d91873e969623..68b6092349d7e2ac41d5375613bbd84872eb2d90 100644 (file)
--- a/arch/arc/include/asm/irqflags-arcv2.h
+++ b/arch/arc/include/asm/irqflags-arcv2.h
@@ -22,6 +22,7 @@
 #define AUX_IRQ_CTRL           0x00E
 #define AUX_IRQ_ACT            0x043   /* Active Intr across all levels */
 #define AUX_IRQ_LVL_PEND       0x200   /* Pending Intr across all levels */
+#define AUX_IRQ_HINT           0x201   /* For generating Soft Interrupts */
 #define AUX_IRQ_PRIORITY       0x206
 #define ICAUSE                 0x40a
 #define AUX_IRQ_SELECT         0x40b
@@ -112,6 +113,16 @@ static inline int arch_irqs_disabled(void)
        return arch_irqs_disabled_flags(arch_local_save_flags());
 }
 
+static inline void arc_softirq_trigger(int irq)
+{
+       write_aux_reg(AUX_IRQ_HINT, irq);
+}
+
+static inline void arc_softirq_clear(int irq)
+{
+       write_aux_reg(AUX_IRQ_HINT, 0);
+}
+
 #else
 
 .macro IRQ_DISABLE  scratch