[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / mtrr.h

/*  Generic MTRR (Memory Type Range Register) ioctls.

    Copyright (C) 1997-1999  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 _ASM_X86_MTRR_H
#define _ASM_X86_MTRR_H

#include <linux/ioctl.h>
#include <linux/errno.h>

#define	MTRR_IOCTL_BASE	'M'

struct mtrr_sentry {
    unsigned long base;    /*  Base address     */
    unsigned int size;    /*  Size of region   */
    unsigned int type;     /*  Type of region   */
};

/* Warning: this structure has a different order from i386
   on x86-64. The 32bit emulation code takes care of that.
   But you need to use this for 64bit, otherwise your X server
   will break. */

#ifdef __i386__
struct mtrr_gentry {
    unsigned int regnum;   /*  Register number  */
    unsigned long base;    /*  Base address     */
    unsigned int size;    /*  Size of region   */
    unsigned int type;     /*  Type of region   */
};

#else /* __i386__ */

struct mtrr_gentry {
    unsigned long base;    /*  Base address     */
    unsigned int size;    /*  Size of region   */
    unsigned int regnum;   /*  Register number  */
    unsigned int type;     /*  Type of region   */
};
#endif /* !__i386__ */

/*  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)
#define MTRRIOC_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry)
#define MTRRIOC_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry)
#define MTRRIOC_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry)
#define MTRRIOC_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry)
#define MTRRIOC_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
#define MTRRIOC_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry)

/*  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 __KERNEL__

/*  The following functions are for use by other drivers  */
# ifdef CONFIG_MTRR
extern u8 mtrr_type_lookup(u64 addr, u64 end);
extern void mtrr_save_fixed_ranges(void *);
extern void mtrr_save_state(void);
extern int mtrr_add(unsigned long base, unsigned long size,
		    unsigned int type, bool increment);
extern int mtrr_add_page(unsigned long base, unsigned long size,
			 unsigned int type, bool increment);
extern int mtrr_del(int reg, unsigned long base, unsigned long size);
extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
extern void mtrr_ap_init(void);
extern void mtrr_bp_init(void);
extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
extern int amd_special_default_mtrr(void);
#  else
static inline u8 mtrr_type_lookup(u64 addr, u64 end)
{
	/*
	 * Return no-MTRRs:
	 */
	return 0xff;
}
#define mtrr_save_fixed_ranges(arg) do {} while (0)
#define mtrr_save_state() do {} while (0)
static inline int mtrr_add(unsigned long base, unsigned long size,
			   unsigned int type, bool increment)
{
    return -ENODEV;
}
static inline int mtrr_add_page(unsigned long base, unsigned long size,
				unsigned int type, bool increment)
{
    return -ENODEV;
}
static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
{
    return -ENODEV;
}
static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
{
    return -ENODEV;
}
static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
{
	return 0;
}
static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
{
}

#define mtrr_ap_init() do {} while (0)
#define mtrr_bp_init() do {} while (0)
#  endif

#ifdef CONFIG_COMPAT
#include <linux/compat.h>

struct mtrr_sentry32 {
    compat_ulong_t base;    /*  Base address     */
    compat_uint_t size;    /*  Size of region   */
    compat_uint_t type;     /*  Type of region   */
};

struct mtrr_gentry32 {
    compat_ulong_t regnum;   /*  Register number  */
    compat_uint_t base;    /*  Base address     */
    compat_uint_t size;    /*  Size of region   */
    compat_uint_t type;     /*  Type of region   */
};

#define MTRR_IOCTL_BASE 'M'

#define MTRRIOC32_ADD_ENTRY      _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry32)
#define MTRRIOC32_SET_ENTRY      _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry32)
#define MTRRIOC32_DEL_ENTRY      _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry32)
#define MTRRIOC32_GET_ENTRY      _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
#define MTRRIOC32_KILL_ENTRY     _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry32)
#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry32)
#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry32)
#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry32)
#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
#define MTRRIOC32_KILL_PAGE_ENTRY		\
				 _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry32)
#endif /* CONFIG_COMPAT */

#endif /* __KERNEL__ */

#endif /* _ASM_X86_MTRR_H */
Commit	Line	Data
297a99e1 TG	1	/* Generic MTRR (Memory Type Range Register) ioctls.
	2
	3	Copyright (C) 1997-1999 Richard Gooch
	4
	5	This library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Library General Public
	7	License as published by the Free Software Foundation; either
	8	version 2 of the License, or (at your option) any later version.
	9
	10	This library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Library General Public License for more details.
	14
	15	You should have received a copy of the GNU Library General Public
	16	License along with this library; if not, write to the Free
	17	Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18
	19	Richard Gooch may be reached by email at rgooch@atnf.csiro.au
	20	The postal address is:
	21	Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
	22	*/
1965aae3 PA	23	#ifndef _ASM_X86_MTRR_H
1965aae3 PA	24	#define _ASM_X86_MTRR_H
297a99e1 TG	25
	26	#include <linux/ioctl.h>
	27	#include <linux/errno.h>
	28
	29	#define MTRR_IOCTL_BASE 'M'
	30
9969b440	31	struct mtrr_sentry {
297a99e1 TG	32	unsigned long base; /* Base address */
	33	unsigned int size; /* Size of region */
	34	unsigned int type; /* Type of region */
	35	};
	36
	37	/* Warning: this structure has a different order from i386
	38	on x86-64. The 32bit emulation code takes care of that.
	39	But you need to use this for 64bit, otherwise your X server
	40	will break. */
	41
	42	#ifdef __i386__
9969b440	43	struct mtrr_gentry {
297a99e1 TG	44	unsigned int regnum; /* Register number */
	45	unsigned long base; /* Base address */
	46	unsigned int size; /* Size of region */
	47	unsigned int type; /* Type of region */
	48	};
	49
	50	#else /* __i386__ */
	51
9969b440	52	struct mtrr_gentry {
297a99e1 TG	53	unsigned long base; /* Base address */
	54	unsigned int size; /* Size of region */
	55	unsigned int regnum; /* Register number */
	56	unsigned int type; /* Type of region */
	57	};
	58	#endif /* !__i386__ */
	59
	60	/* These are the various ioctls */
	61	#define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
	62	#define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
	63	#define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
	64	#define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
	65	#define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
	66	#define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
	67	#define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
	68	#define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
	69	#define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
	70	#define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
	71
	72	/* These are the region types */
	73	#define MTRR_TYPE_UNCACHABLE 0
	74	#define MTRR_TYPE_WRCOMB 1
	75	/#define MTRR_TYPE_ 2/
	76	/#define MTRR_TYPE_ 3/
	77	#define MTRR_TYPE_WRTHROUGH 4
	78	#define MTRR_TYPE_WRPROT 5
	79	#define MTRR_TYPE_WRBACK 6
	80	#define MTRR_NUM_TYPES 7
	81
96a388de	82	#ifdef __KERNEL__
297a99e1 TG	83
	84	/* The following functions are for use by other drivers */
	85	# ifdef CONFIG_MTRR
52783fa8	86	extern u8 mtrr_type_lookup(u64 addr, u64 end);
297a99e1 TG	87	extern void mtrr_save_fixed_ranges(void *);
297a99e1 TG	88	extern void mtrr_save_state(void);
9969b440 JP	89	extern int mtrr_add(unsigned long base, unsigned long size,
	90	unsigned int type, bool increment);
	91	extern int mtrr_add_page(unsigned long base, unsigned long size,
	92	unsigned int type, bool increment);
	93	extern int mtrr_del(int reg, unsigned long base, unsigned long size);
	94	extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
297a99e1 TG	95	extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
	96	extern void mtrr_ap_init(void);
	97	extern void mtrr_bp_init(void);
99fc8d42	98	extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
35605a10	99	extern int amd_special_default_mtrr(void);
297a99e1	100	# else
52783fa8 IM	101	static inline u8 mtrr_type_lookup(u64 addr, u64 end)
	102	{
	103	/*
	104	* Return no-MTRRs:
	105	*/
	106	return 0xff;
	107	}
297a99e1 TG	108	#define mtrr_save_fixed_ranges(arg) do {} while (0)
297a99e1 TG	109	#define mtrr_save_state() do {} while (0)
9969b440 JP	110	static inline int mtrr_add(unsigned long base, unsigned long size,
9969b440 JP	111	unsigned int type, bool increment)
297a99e1 TG	112	{
	113	return -ENODEV;
	114	}
9969b440	115	static inline int mtrr_add_page(unsigned long base, unsigned long size,
2d2ee8de	116	unsigned int type, bool increment)
297a99e1 TG	117	{
	118	return -ENODEV;
	119	}
9969b440	120	static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
297a99e1 TG	121	{
	122	return -ENODEV;
	123	}
9969b440	124	static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
297a99e1 TG	125	{
	126	return -ENODEV;
	127	}
99fc8d42 JB	128	static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
	129	{
	130	return 0;
	131	}
9969b440 JP	132	static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
	133	{
	134	}
297a99e1 TG	135
	136	#define mtrr_ap_init() do {} while (0)
	137	#define mtrr_bp_init() do {} while (0)
	138	# endif
	139
	140	#ifdef CONFIG_COMPAT
	141	#include <linux/compat.h>
	142
9969b440	143	struct mtrr_sentry32 {
297a99e1 TG	144	compat_ulong_t base; /* Base address */
	145	compat_uint_t size; /* Size of region */
	146	compat_uint_t type; /* Type of region */
	147	};
	148
9969b440	149	struct mtrr_gentry32 {
297a99e1 TG	150	compat_ulong_t regnum; /* Register number */
	151	compat_uint_t base; /* Base address */
	152	compat_uint_t size; /* Size of region */
	153	compat_uint_t type; /* Type of region */
	154	};
	155
	156	#define MTRR_IOCTL_BASE 'M'
	157
9969b440 JP	158	#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
	159	#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
	160	#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
	161	#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
	162	#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
	163	#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
	164	#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
	165	#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
	166	#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
	167	#define MTRRIOC32_KILL_PAGE_ENTRY \
	168	_IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
297a99e1 TG	169	#endif /* CONFIG_COMPAT */
	170
	171	#endif /* __KERNEL__ */
	172
1965aae3	173	#endif /* _ASM_X86_MTRR_H */