added locking primitives

[palacios.git] / palacios / include / palacios / vmm_lowlevel.h

diff --git a/palacios/include/palacios/vmm_lowlevel.h b/palacios/include/palacios/vmm_lowlevel.h
index 687069f..7863d19 100644 (file)
--- a/palacios/include/palacios/vmm_lowlevel.h
+++ b/palacios/include/palacios/vmm_lowlevel.h
@@ -81,3 +81,57 @@ static void __inline__ v3_disable_ints() {
     __asm__ __volatile__ ("cli");
 }
 
+
+
+
+#ifdef __V3_32BIT__
+
+static addr_t __inline__ v3_irq_save() {
+    addr_t state;
+
+    __asm__ __volatile__ ("pushf \n\t"
+                         "popl %0 \n\t"
+                         "cli \n\t"
+                         :"=g" (x)
+                         : 
+                         :"memory"
+                         ); 
+    return state;
+}
+
+static void __inline__ v3_irq_restore(addr_t state) {
+    __asm__ __volatile__("pushl %0 \n\t"
+                        "popfl \n\t"
+                        : 
+                        :"g" (state)
+                        :"memory", "cc"
+                        );
+}
+
+#elif __V3_64BIT__
+
+static addr_t __inline__ v3_irq_save() {
+    addr_t state; 
+
+    __asm__ __volatile__ ("pushfq \n\t"
+                         "popq %0 \n\t"
+                         "cli \n\t"
+                         :"=g" (state)
+                         : 
+                         :"memory"
+                         ); 
+
+    return state;
+}
+
+
+static void __inline__ v3_irq_restore(addr_t state) {
+    __asm__ __volatile__("pushq %0 \n\t"
+                        "popfq \n\t"
+                        : 
+                        :"g" (state)
+                        :"memory", "cc"
+                        );
+}
+
+#endif