Index: arch/amd64/include/pm.h
===================================================================
--- arch/amd64/include/pm.h	(revision 1141c1acbca81894d031f82ef77daf4f75d1b87a)
+++ arch/amd64/include/pm.h	(revision a6f889981680d139ce46a5e36dd9d64fe4b49a2a)
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2001-2004 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PM_H__
+#define __PM_H__
+
+#include <arch/types.h>
+#include <typedefs.h>
+#include <arch/context.h>
+
+#define IDT_ITEMS 64
+#define GDT_ITEMS 6
+
+#define NULL_DES	0
+#define KTEXT_DES	1
+#define	KDATA_DES	2
+#define UTEXT_DES	3
+#define UDATA_DES	4
+#define TSS_DES		5
+
+#define selector(des)	((des)<<3)
+
+#define PL_KERNEL	0
+#define PL_USER		3
+
+#define AR_PRESENT	(1<<7)
+#define AR_DATA		(2<<3)
+#define AR_CODE		(3<<3)
+#define AR_WRITABLE	(1<<1)
+#define AR_INTERRUPT	(0xe)
+#define AR_TSS		(0x9)
+
+#define DPL_KERNEL	(PL_KERNEL<<5)
+#define DPL_USER	(PL_USER<<5)
+
+#define IO_MAP_BASE	(104)
+
+struct ptr_16_32 {
+	__u16 limit;
+	__u32 base;
+} __attribute__ ((packed));
+
+struct descriptor {
+	unsigned limit_0_15: 16;
+	unsigned base_0_15: 16;
+	unsigned base_16_23: 8;
+	unsigned access: 8;
+	unsigned limit_16_19: 4;
+	unsigned available: 1;
+	unsigned longmode: 1;
+	unsigned special: 1;
+	unsigned granularity : 1;
+	unsigned base_24_31: 8;
+} __attribute__ ((packed));
+
+struct idescriptor {
+	unsigned offset_0_15: 16;
+	unsigned selector: 16;
+	unsigned unused: 8;
+	unsigned access: 8;
+	unsigned offset_16_31: 16;
+} __attribute__ ((packed));
+
+
+struct tss {
+	__u16 link;
+	unsigned : 16;
+	__u32 esp0;
+	__u16 ss0;
+	unsigned : 16;
+	__u32 esp1;
+	__u16 ss1;
+	unsigned : 16;
+	__u32 esp2;
+	__u16 ss2;
+	unsigned : 16;
+	__u32 cr3;
+	__u32 eip;
+	__u32 eflags;
+	__u32 eax;
+	__u32 ecx;
+	__u32 edx;
+	__u32 ebx;
+	__u32 esp;
+	__u32 ebp;
+	__u32 esi;
+	__u32 edi;
+	__u16 es;
+	unsigned : 16;
+	__u16 cs;
+	unsigned : 16;
+	__u16 ss;
+	unsigned : 16;
+	__u16 ds;
+	unsigned : 16;
+	__u16 fs;
+	unsigned : 16;
+	__u16 gs;
+	unsigned : 16;
+	__u16 ldtr;
+	unsigned : 16;
+	unsigned : 16;
+	__u16 io_map_base;
+} __attribute__ ((packed));
+
+extern struct ptr_16_32 gdtr;
+extern struct tss *tss_p;
+
+extern struct descriptor gdt[];
+extern struct idescriptor idt[];
+
+extern void pm_init(void);
+
+extern void gdt_setbase(struct descriptor *d, __address base);
+extern void gdt_setlimit(struct descriptor *d, __u32 limit);
+
+extern void idt_init(void);
+extern void idt_setoffset(struct idescriptor *d, __address offset);
+
+extern void tss_initialize(struct tss *t);
+
+#endif