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133 lines
4.6 KiB
133 lines
4.6 KiB
/* 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 [email protected] |
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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/memtype.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("PAT support disabled because CONFIG_MTRR is disabled in the kernel."); |
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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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