/* * Generic MTRR (Memory Type Range Register) ioctls. * Taken from the Linux kernel * * (C) Copyright 2012 * Graeme Russ, * * Copyright (C) 1997-1999 Richard Gooch * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef _ASM_X86_MTRR_H #define _ASM_X86_MTRR_H #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg)) #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1) #ifndef __ASSEMBLY__ #include #include #include #define MTRR_IOCTL_BASE 'M' struct mtrr_sentry { unsigned long base; /* Base address */ unsigned int size; /* Size of region */ unsigned int type; /* Type of region */ }; /* * Warning: this structure has a different order from i386 * on x86-64. The 32bit emulation code takes care of that. * But you need to use this for 64bit, otherwise your X server * will break. */ #ifdef __i386__ struct mtrr_gentry { unsigned int regnum; /* Register number */ unsigned long base; /* Base address */ unsigned int size; /* Size of region */ unsigned int type; /* Type of region */ }; #else /* __i386__ */ struct mtrr_gentry { unsigned long base; /* Base address */ unsigned int size; /* Size of region */ unsigned int regnum; /* Register number */ unsigned int type; /* Type of region */ }; #endif /* !__i386__ */ struct mtrr_var_range { __u32 base_lo; __u32 base_hi; __u32 mask_lo; __u32 mask_hi; }; /* * In the Intel processor's MTRR interface, the MTRR type is always held in * an 8 bit field: */ typedef __u8 mtrr_type; #define MTRR_NUM_FIXED_RANGES 88 #define MTRR_MAX_VAR_RANGES 256 struct mtrr_state_type { struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES]; mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES]; unsigned char enabled; unsigned char have_fixed; mtrr_type def_type; }; /* These are the various ioctls */ #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) /* These are the region types */ #define MTRR_TYPE_UNCACHABLE 0 #define MTRR_TYPE_WRCOMB 1 /*#define MTRR_TYPE_ 2*/ /*#define MTRR_TYPE_ 3*/ #define MTRR_TYPE_WRTHROUGH 4 #define MTRR_TYPE_WRPROT 5 #define MTRR_TYPE_WRBACK 6 #define MTRR_NUM_TYPES 7 #ifdef __KERNEL__ /* The following functions are for use by other drivers */ # 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); # 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_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) { } #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 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 /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_MTRR_H */