patch-2.1.99 linux/include/asm-i386/mtrr.h

• Lines: 104
• Date: Wed Apr 29 22:46:59 1998
• Orig file: v2.1.98/linux/include/asm-i386/mtrr.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.98/linux/include/asm-i386/mtrr.h linux/include/asm-i386/mtrr.h
@@ -0,0 +1,103 @@
+/*  Generic MTRR (Memory Type Range Register) ioctls.
+
+    Copyright (C) 1997-1998  Richard Gooch
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
+    The postal address is:
+      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
+*/
+#ifndef _LINUX_MTRR_H
+#define _LINUX_MTRR_H
+
+#include <linux/config.h>
+#include <linux/ioctl.h>
+
+#define	MTRR_IOCTL_BASE	'M'
+
+struct mtrr_sentry
+{
+    unsigned long base;    /*  Base address     */
+    unsigned long size;    /*  Size of region   */
+    unsigned int type;     /*  Type of region   */
+};
+
+struct mtrr_gentry
+{
+    unsigned int regnum;   /*  Register number  */
+    unsigned long base;    /*  Base address     */
+    unsigned long size;    /*  Size of region   */
+    unsigned int type;     /*  Type of region   */
+};
+
+/*  These are the various ioctls  */
+#define MTRRIOC_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
+#define MTRRIOC_SET_ENTRY        _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
+#define MTRRIOC_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
+#define MTRRIOC_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
+
+/*  These are the region types  */
+#define MTRR_TYPE_UNCACHABLE 0
+#define MTRR_TYPE_WRCOMB     1
+/*#define MTRR_TYPE_         2*/
+/*#define MTRR_TYPE_         3*/
+#define MTRR_TYPE_WRTHROUGH  4
+#define MTRR_TYPE_WRPROT     5
+#define MTRR_TYPE_WRBACK     6
+#define MTRR_NUM_TYPES       7
+
+#ifdef MTRR_NEED_STRINGS
+static char *mtrr_strings[MTRR_NUM_TYPES] =
+{
+    "uncachable",               /* 0 */
+    "write-combining",          /* 1 */
+    "?",                        /* 2 */
+    "?",                        /* 3 */
+    "write-through",            /* 4 */
+    "write-protect",            /* 5 */
+    "write-back",               /* 6 */
+};
+#endif
+
+#ifdef __KERNEL__
+
+/*  The following functions are for use by other drivers  */
+# if defined(CONFIG_MTRR) || defined(CONFIG_MTRR_MODULE)
+extern int mtrr_add (unsigned long base, unsigned long size,
+		     unsigned int type, char increment);
+extern int mtrr_del (int reg, unsigned long base, unsigned long size);
+#  else
+static __inline__ int mtrr_add (unsigned long base, unsigned long size,
+				unsigned int type, char increment)
+{
+    return -ENODEV;
+}
+static __inline__ mtrr_del (int reg, unsigned long base, unsigned long size)
+{
+    return -ENODEV;
+}
+#  endif
+
+/*  The following functions are for initialisation: don't use them!  */
+extern int mtrr_init (void);
+#  if defined(__SMP__) && defined(CONFIG_MTRR)
+extern void mtrr_init_boot_cpu (void);
+extern void mtrr_init_secondary_cpu (void);
+#  endif
+
+#endif
+
+#endif  /*  _LINUX_MTRR_H  */