linux/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  [email protected]
    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/bits.h>
#include <uapi/asm/mtrr.h>

/* Defines for hardware MTRR registers. */
#define MTRR_CAP_VCNT …
#define MTRR_CAP_FIX …
#define MTRR_CAP_WC …

#define MTRR_DEF_TYPE_TYPE …
#define MTRR_DEF_TYPE_FE …
#define MTRR_DEF_TYPE_E …

#define MTRR_DEF_TYPE_ENABLE …
#define MTRR_DEF_TYPE_DISABLE …

#define MTRR_PHYSBASE_TYPE …
#define MTRR_PHYSBASE_RSVD …

#define MTRR_PHYSMASK_RSVD …
#define MTRR_PHYSMASK_V …

struct mtrr_state_type { … };

/*
 * The following functions are for use by other drivers that cannot use
 * arch_phys_wc_add and arch_phys_wc_del.
 */
# ifdef CONFIG_MTRR
void mtrr_bp_init(void);
void mtrr_overwrite_state(struct mtrr_var_range *var, unsigned int num_var,
			  mtrr_type def_type);
extern u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform);
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_bp_restore(void);
extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
extern int amd_special_default_mtrr(void);
void mtrr_disable(void);
void mtrr_enable(void);
void mtrr_generic_set_state(void);
#  else
static inline void mtrr_overwrite_state(struct mtrr_var_range *var,
					unsigned int num_var,
					mtrr_type def_type)
{
}

static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform)
{
	/*
	 * Return the default MTRR type, without any known other types in
	 * that range.
	 */
	*uniform = 1;

	return MTRR_TYPE_UNCACHABLE;
}
#define mtrr_save_fixed_ranges …
#define mtrr_save_state …
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;
}
#define mtrr_bp_init …
#define mtrr_bp_restore …
#define mtrr_disable …
#define mtrr_enable …
#define mtrr_generic_set_state …
#  endif

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

struct mtrr_sentry32 { … };

struct mtrr_gentry32 { … };

#define MTRR_IOCTL_BASE …

#define MTRRIOC32_ADD_ENTRY …
#define MTRRIOC32_SET_ENTRY …
#define MTRRIOC32_DEL_ENTRY …
#define MTRRIOC32_GET_ENTRY …
#define MTRRIOC32_KILL_ENTRY …
#define MTRRIOC32_ADD_PAGE_ENTRY …
#define MTRRIOC32_SET_PAGE_ENTRY …
#define MTRRIOC32_DEL_PAGE_ENTRY …
#define MTRRIOC32_GET_PAGE_ENTRY …
#define MTRRIOC32_KILL_PAGE_ENTRY …
#endif /* CONFIG_COMPAT */

/* Bit fields for enabled in struct mtrr_state_type */
#define MTRR_STATE_SHIFT …
#define MTRR_STATE_MTRR_FIXED_ENABLED …
#define MTRR_STATE_MTRR_ENABLED …

#endif /* _ASM_X86_MTRR_H */