/* 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 <uapi/asm/mtrr.h>


/*
* The following functions are for use by other drivers that cannot use
* arch_phys_wc_add and arch_phys_wc_del.
*/
# 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 void set_mtrr_aps_delayed_init(void);
extern void mtrr_aps_init(void);
extern void mtrr_bp_restore(void);
extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
extern int amd_special_default_mtrr(void);
extern int phys_wc_to_mtrr_index(int handle);
# 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)
{
}
static inline int phys_wc_to_mtrr_index(int handle)
{
return -1;
}

#define mtrr_ap_init() do {} while (0)
#define mtrr_bp_init() do {} while (0)
#define set_mtrr_aps_delayed_init() do {} while (0)
#define mtrr_aps_init() do {} while (0)
#define mtrr_bp_restore() 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 /* _ASM_X86_MTRR_H */