Changeset dd4d6b0 in mainline for arch/amd64/include/asm.h

Timestamp:

2006-02-06T23:47:47Z (19 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

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

Children:

37b451f7

Parents:

40ca402

Message:

Basic amd syscall support.

File:

• arch/amd64/include/asm.h (modified) (1 diff)

arch/amd64/include/asm.h

@@ -189 +189 @@
 }
 
+/** Write to MSR */
+static inline void write_msr(__u32 msr, __u64 value)
+{
+        __asm__ volatile (
+                "wrmsr;" : : "c" (msr), 
+                "a" ((__u32)(value)),
+                "d" ((__u32)(value >> 32))
+                );
+}
+
+static inline __native read_msr(__u32 msr)
+{
+        __u32 ax, dx;
+
+        __asm__ volatile (
+                "rdmsr;" : "=a"(ax), "=d"(dx) : "c" (msr)
+                );
+        return ((__u64)dx << 32) | ax;
+}
+
 
 /** Enable local APIC