xref: /src/sys/arch/amd64/include/specialreg.h

/*	$NetBSD: specialreg.h,v 1.3 2005/12/11 12:16:25 christos Exp $	*/

#include <x86/specialreg.h>

/*
 * Extended Feature Enable Register of the x86-64
 */

#define MSR_EFER	0xc0000080

#define EFER_SCE	0x00000001	/* SYSCALL extension */
#define EFER_LME	0x00000100	/* Long Mode Active */
#define EFER_LMA	0x00000400	/* Long Mode Enabled */
#define EFER_NXE	0x00000800	/* No-Execute Enabled */

#define MSR_STAR	0xc0000081		/* 32 bit syscall gate addr */
#define MSR_LSTAR	0xc0000082		/* 64 bit syscall gate addr */
#define MSR_CSTAR	0xc0000083		/* compat syscall gate addr */
#define MSR_SFMASK	0xc0000084		/* flags to clear on syscall */

#define MSR_FSBASE		0xc0000100	/* 64bit offset for fs: */
#define MSR_GSBASE		0xc0000101	/* 64bit offset for gs: */
#define MSR_KERNELGSBASE	0xc0000102	/* storage for swapgs ins */