Changeset d0ee0de in mainline for kernel/arch/amd64/include/asm.h

Timestamp:

2010-05-20T21:25:35Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8aa9265

Parents:

3d948be

Message:

Add amd64 interrupts_disabled().

File:

• kernel/arch/amd64/include/asm.h (modified) (2 diffs)

kernel/arch/amd64/include/asm.h

@@ -38 +38 @@
 #include <config.h>
 #include <typedefs.h>
+#include <arch/cpu.h>
 
 extern void asm_delay_loop(uint32_t t);
@@ -269 +270 @@
         return v;
 }
+
+/** Check interrupts state.
+ *
+ * @return True if interrupts are disabled.
+ *
+ */
+static inline bool interrupts_disabled(void)
+{
+        ipl_t v;
+        
+        asm volatile (
+                "pushfq\n"
+                "popq %[v]\n"
+                : [v] "=r" (v)
+        );
+        
+        return ((v & RFLAGS_IF) == 0);
+}
+
 
 /** Write to MSR */