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-rw-r--r--target-i386/cpu.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index d37d857d21..3460b12139 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -337,6 +337,8 @@
#define MSR_MTRRphysBase(reg) (0x200 + 2 * (reg))
#define MSR_MTRRphysMask(reg) (0x200 + 2 * (reg) + 1)
+#define MSR_MTRRphysIndex(addr) ((((addr) & ~1u) - 0x200) / 2)
+
#define MSR_MTRRfix64K_00000 0x250
#define MSR_MTRRfix16K_80000 0x258
#define MSR_MTRRfix16K_A0000 0x259