194 lines
5.9 KiB
C
194 lines
5.9 KiB
C
/*
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* Generic MTRR (Memory Type Range Register) ioctls.
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* Taken from the Linux kernel
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*
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* (C) Copyright 2012
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* Copyright (C) 1997-1999 Richard Gooch <rgooch@atnf.csiro.au>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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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#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
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#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <errno.h>
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#define MTRR_IOCTL_BASE 'M'
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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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/*
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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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*/
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#ifdef __i386__
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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_gentry {
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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 regnum; /* Register number */
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unsigned int type; /* Type of region */
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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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/*
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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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*/
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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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/* 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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/* These are the region types */
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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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#ifdef __KERNEL__
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/* The following functions are for use by other drivers */
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# ifdef CONFIG_MTRR
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extern u8 mtrr_type_lookup(u64 addr, u64 end);
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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)
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{
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/*
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* Return no-MTRRs:
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*/
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return 0xff;
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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_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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#define mtrr_ap_init() do {} while (0)
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#define mtrr_bp_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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#endif /* __KERNEL__ */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_MTRR_H */
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