-/*
- * Copyright (C) 1997 Massachusetts Institute of Technology
- *
- * This software is being provided by the copyright holders under the
- * following license. By obtaining, using and/or copying this software,
- * you agree that you have read, understood, and will comply with the
- * following terms and conditions:
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose and without fee or royalty is
- * hereby granted, provided that the full text of this NOTICE appears on
- * ALL copies of the software and documentation or portions thereof,
- * including modifications, that you make.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE NO
- * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF EXAMPLE,
- * BUT NOT LIMITATION, COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS OR
- * WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR
- * THAT THE USE OF THE SOFTWARE OR DOCUMENTATION WILL NOT INFRINGE ANY
- * THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS. COPYRIGHT
- * HOLDERS WILL BEAR NO LIABILITY FOR ANY USE OF THIS SOFTWARE OR
- * DOCUMENTATION.
- *
- * The name and trademarks of copyright holders may NOT be used in
- * advertising or publicity pertaining to the software without specific,
- * written prior permission. Title to copyright in this software and any
- * associated documentation will at all times remain with copyright
- * holders. See the file AUTHORS which should have accompanied this software
- * for a list of all copyright holders.
- *
- * This file may be derived from previously copyrighted software. This
- * copyright applies only to those changes made by the copyright
- * holders listed in the AUTHORS file. The rest of this file is covered by
- * the copyright notices, if any, listed below.
- */
-
-
-#ifndef _MMU_H_
-#define _MMU_H_
+#ifndef HEADER_MMU_H
+#define HEADER_MMU_H 1
#ifndef __ASSEMBLER__
#include <stdint.h>
-#include "debug.h"
+#include "lib/debug.h"
#endif
#include "loader.h"
/* Returns kernel virtual address at which physical address PADDR
is mapped. */
static inline void *
-ptov (uintptr_t paddr)
+ptov (uintptr_t paddr)
{
ASSERT ((void *) paddr < PHYS_BASE);
/* Returns physical address at which kernel virtual address VADDR
is mapped. */
static inline uintptr_t
-vtop (void *vaddr)
+vtop (void *vaddr)
{
ASSERT (vaddr >= PHYS_BASE);
}
#endif
-/* Page Table/Directory Entry flags
- * these are defined by the hardware
- */
-#define PG_P 0x1 /* Present */
-#define PG_W 0x2 /* Writeable */
-#define PG_U 0x4 /* User */
-#define PG_A 0x20 /* Accessed */
-#define PG_D 0x40 /* Dirty */
+/* Page Directory Entry (PDE) and Page Table Entry (PTE) flags. */
+#define PG_P 0x1 /* 1=present, 0=not present. */
+#define PG_W 0x2 /* 1=read/write, 0=read-only. */
+#define PG_U 0x4 /* 1=user/kernel, 0=kernel only. */
+#define PG_A 0x20 /* 1=accessed, 0=not acccessed. */
+#define PG_D 0x40 /* 1=dirty, 0=not dirty. */
/* EFLAGS Register. */
#define FLAG_MBS 0x00000002 /* Must be set. */
#define FLAG_IF 0x00000200 /* Interrupt Flag. */
-/* Page fault error codes */
-#define FEC_PR 0x1 /* Page fault caused by protection violation */
-#define FEC_WR 0x2 /* Page fault caused by a write */
-#define FEC_U 0x4 /* Page fault occured while in user mode */
-
-
-/* Application segment type bits */
-#define STA_X 0x8 /* Executable segment */
-#define STA_A 0x1 /* Accessed */
-
-#define STA_C 0x4 /* Conforming code segment (executable only) */
-#define STA_R 0x2 /* Readable (executable segments) */
-
-#define STA_E 0x4 /* Expand down (non-executable segments) */
-#define STA_W 0x2 /* Writeable (non-executable segments) */
-
-
-
-#endif /* !_MMU_H_ */
+#endif /* mmu.h */
projects / pintos-anon / blobdiff