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124 lines
4.1 KiB
124 lines
4.1 KiB
/* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */ |
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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 [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 _UAPI_ASM_X86_MTRR_H |
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#define _UAPI_ASM_X86_MTRR_H |
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#include <linux/types.h> |
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#include <linux/ioctl.h> |
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#include <linux/errno.h> |
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#define MTRR_IOCTL_BASE 'M' |
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/* Warning: this structure has a different order from i386 |
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on x86-64. The 32bit emulation code takes care of that. |
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But you need to use this for 64bit, otherwise your X server |
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will break. */ |
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#ifdef __i386__ |
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struct mtrr_sentry { |
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unsigned long base; /* Base address */ |
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unsigned int size; /* Size of region */ |
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unsigned int type; /* Type of region */ |
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}; |
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struct mtrr_gentry { |
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unsigned int regnum; /* Register number */ |
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unsigned long base; /* Base address */ |
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unsigned int size; /* Size of region */ |
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unsigned int type; /* Type of region */ |
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}; |
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#else /* __i386__ */ |
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struct mtrr_sentry { |
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__u64 base; /* Base address */ |
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__u32 size; /* Size of region */ |
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__u32 type; /* Type of region */ |
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}; |
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struct mtrr_gentry { |
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__u64 base; /* Base address */ |
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__u32 size; /* Size of region */ |
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__u32 regnum; /* Register number */ |
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__u32 type; /* Type of region */ |
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__u32 _pad; /* Unused */ |
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}; |
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#endif /* !__i386__ */ |
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struct mtrr_var_range { |
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__u32 base_lo; |
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__u32 base_hi; |
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__u32 mask_lo; |
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__u32 mask_hi; |
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}; |
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/* In the Intel processor's MTRR interface, the MTRR type is always held in |
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an 8 bit field: */ |
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typedef __u8 mtrr_type; |
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#define MTRR_NUM_FIXED_RANGES 88 |
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#define MTRR_MAX_VAR_RANGES 256 |
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struct mtrr_state_type { |
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struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES]; |
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mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES]; |
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unsigned char enabled; |
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unsigned char have_fixed; |
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mtrr_type def_type; |
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}; |
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#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg)) |
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#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1) |
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/* These are the various ioctls */ |
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#define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) |
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#define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) |
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#define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) |
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#define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) |
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#define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) |
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#define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) |
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#define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) |
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#define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) |
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#define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) |
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#define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) |
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/* MTRR memory types, which are defined in SDM */ |
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#define MTRR_TYPE_UNCACHABLE 0 |
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#define MTRR_TYPE_WRCOMB 1 |
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/*#define MTRR_TYPE_ 2*/ |
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/*#define MTRR_TYPE_ 3*/ |
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#define MTRR_TYPE_WRTHROUGH 4 |
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#define MTRR_TYPE_WRPROT 5 |
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#define MTRR_TYPE_WRBACK 6 |
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#define MTRR_NUM_TYPES 7 |
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/* |
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* Invalid MTRR memory type. mtrr_type_lookup() returns this value when |
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* MTRRs are disabled. Note, this value is allocated from the reserved |
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* values (0x7-0xff) of the MTRR memory types. |
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*/ |
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#define MTRR_TYPE_INVALID 0xff |
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#endif /* _UAPI_ASM_X86_MTRR_H */
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