134 lines
4.6 KiB
C
134 lines
4.6 KiB
C
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/* Generic MTRR (Memory Type Range Register) ioctls.
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Copyright (C) 1997-1999 Richard Gooch
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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Richard Gooch may be reached by email at rgooch@atnf.csiro.au
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The postal address is:
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Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
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*/
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#ifndef _ASM_X86_MTRR_H
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#define _ASM_X86_MTRR_H
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#include <uapi/asm/mtrr.h>
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#include <asm/pat.h>
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/*
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* The following functions are for use by other drivers that cannot use
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* arch_phys_wc_add and arch_phys_wc_del.
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*/
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# ifdef CONFIG_MTRR
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extern u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform);
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extern void mtrr_save_fixed_ranges(void *);
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extern void mtrr_save_state(void);
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extern int mtrr_add(unsigned long base, unsigned long size,
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unsigned int type, bool increment);
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extern int mtrr_add_page(unsigned long base, unsigned long size,
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unsigned int type, bool increment);
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extern int mtrr_del(int reg, unsigned long base, unsigned long size);
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extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
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extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
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extern void mtrr_ap_init(void);
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extern void mtrr_bp_init(void);
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extern void set_mtrr_aps_delayed_init(void);
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extern void mtrr_aps_init(void);
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extern void mtrr_bp_restore(void);
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extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
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extern int amd_special_default_mtrr(void);
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# else
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static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform)
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{
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/*
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* Return no-MTRRs:
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*/
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return MTRR_TYPE_INVALID;
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}
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#define mtrr_save_fixed_ranges(arg) do {} while (0)
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#define mtrr_save_state() do {} while (0)
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static inline int mtrr_add(unsigned long base, unsigned long size,
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unsigned int type, bool increment)
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{
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return -ENODEV;
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}
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static inline int mtrr_add_page(unsigned long base, unsigned long size,
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unsigned int type, bool increment)
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{
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return -ENODEV;
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}
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static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
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{
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return -ENODEV;
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}
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static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
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{
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return -ENODEV;
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}
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static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
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{
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return 0;
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}
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static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
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{
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}
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static inline void mtrr_bp_init(void)
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{
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pat_disable("MTRRs disabled, skipping PAT initialization too.");
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}
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#define mtrr_ap_init() do {} while (0)
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#define set_mtrr_aps_delayed_init() do {} while (0)
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#define mtrr_aps_init() do {} while (0)
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#define mtrr_bp_restore() do {} while (0)
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# endif
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#ifdef CONFIG_COMPAT
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#include <linux/compat.h>
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struct mtrr_sentry32 {
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compat_ulong_t base; /* Base address */
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compat_uint_t size; /* Size of region */
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compat_uint_t type; /* Type of region */
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};
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struct mtrr_gentry32 {
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compat_ulong_t regnum; /* Register number */
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compat_uint_t base; /* Base address */
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compat_uint_t size; /* Size of region */
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compat_uint_t type; /* Type of region */
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};
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#define MTRR_IOCTL_BASE 'M'
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#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
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#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
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#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
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#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
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#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
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#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
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#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
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#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
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#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
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#define MTRRIOC32_KILL_PAGE_ENTRY \
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_IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
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#endif /* CONFIG_COMPAT */
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/* Bit fields for enabled in struct mtrr_state_type */
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#define MTRR_STATE_MTRR_FIXED_ENABLED 0x01
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#define MTRR_STATE_MTRR_ENABLED 0x02
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#endif /* _ASM_X86_MTRR_H */
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