Add ARMv7-A irqdisable() inline function

2013-07-30 11:37:09 -06:00 · 2013-07-30 11:37:09 -06:00 · b75a0cf8be
parent 84150fd7ed
commit b75a0cf8be
1 changed files with 18 additions and 0 deletions
--- a/arch/arm/include/armv7-a/irq.h
+++ b/arch/arm/include/armv7-a/irq.h
@ -286,6 +286,24 @@ static inline irqstate_t irqenable(void)
  return cpsr;
 }

+/* Disable IRQs and return the previous IRQ state */
+
+static inline irqstate_t irqdisable(void)
+{
+  unsigned int cpsr;
+
+  __asm__ __volatile__
+    (
+      "\tmrs    %0, cpsr\n"
+      "\tcpsid  i\n"
+      : "=r" (cpsr)
+      :
+      : "memory"
+    );
+
+  return cpsr;
+}
+
 /* Restore saved IRQ & FIQ state */

 static inline void irqrestore(irqstate_t flags)