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/*
* mtrrs.c: Intel(r) TXT MTRR-related definitions
*
* Copyright (c) 2003-2010, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __TXT_MTRRS_H__
#define __TXT_MTRRS_H__
#include <txt/acmod.h>
enum fix_mtrr_t {
MTRR_FIX64K_00000 = 0x250,
MTRR_FIX16K_80000 = 0x258,
MTRR_FIX16K_A0000 = 0x259,
MTRR_FIX4K_C0000 = 0x268,
MTRR_FIX4K_C8000 = 0x269,
MTRR_FIX4K_D0000 = 0x26A,
MTRR_FIX4K_D8000 = 0x26B,
MTRR_FIX4K_E0000 = 0x26C,
MTRR_FIX4K_E8000 = 0x26D,
MTRR_FIX4K_F0000 = 0x26E,
MTRR_FIX4K_F8000 = 0x26F
};
typedef union {
uint64_t raw;
uint8_t type[8];
} mtrr_fix_types_t;
enum var_mtrr_t {
MTRR_PHYS_BASE0_MSR = 0x200,
MTRR_PHYS_MASK0_MSR = 0x201,
MTRR_PHYS_BASE1_MSR = 0x202,
MTRR_PHYS_MASK1_MSR = 0x203,
MTRR_PHYS_BASE2_MSR = 0x204,
MTRR_PHYS_MASK2_MSR = 0x205,
MTRR_PHYS_BASE3_MSR = 0x206,
MTRR_PHYS_MASK3_MSR = 0x207,
MTRR_PHYS_BASE4_MSR = 0x208,
MTRR_PHYS_MASK4_MSR = 0x209,
MTRR_PHYS_BASE5_MSR = 0x20A,
MTRR_PHYS_MASK5_MSR = 0x20B,
MTRR_PHYS_BASE6_MSR = 0x20C,
MTRR_PHYS_MASK6_MSR = 0x20D,
MTRR_PHYS_BASE7_MSR = 0x20E,
MTRR_PHYS_MASK7_MSR = 0x20F
};
typedef union {
uint64_t raw;
struct {
uint64_t vcnt : 8; /* num variable MTRR pairs */
uint64_t fix : 1; /* fixed range MTRRs are supported */
uint64_t reserved1 : 1;
uint64_t wc : 1; /* write-combining mem type supported */
uint64_t reserved2 : 53;
};
} mtrr_cap_t;
typedef union {
uint64_t raw;
struct {
uint64_t type : 8;
uint64_t reserved1 : 2;
uint64_t fe : 1; /* fixed MTRR enable */
uint64_t e : 1; /* (all) MTRR enable */
uint64_t reserved2 : 52;
};
} mtrr_def_type_t;
typedef union {
uint64_t raw;
struct {
uint64_t type : 8;
uint64_t reserved1 : 4;
uint64_t base : 52; /* define as max width and mask w/ */
/* MAXPHYADDR when using */
};
} mtrr_physbase_t;
typedef union {
uint64_t raw;
struct {
uint64_t reserved1 : 11;
uint64_t v : 1; /* valid */
uint64_t mask : 52; /* define as max width and mask w/ */
/* MAXPHYADDR when using */
};
} mtrr_physmask_t;
/* current procs only have 8, so this should hold us for a while */
#define MAX_VARIABLE_MTRRS 16
typedef struct {
mtrr_def_type_t mtrr_def_type;
unsigned int num_var_mtrrs;
mtrr_physbase_t mtrr_physbases[MAX_VARIABLE_MTRRS];
mtrr_physmask_t mtrr_physmasks[MAX_VARIABLE_MTRRS];
} mtrr_state_t;
bool set_mtrrs_for_acmod(const acm_hdr_t *hdr);
void save_mtrrs(mtrr_state_t *saved_state);
void set_all_mtrrs(bool enable);
bool set_mem_type(const void *base, uint32_t size, uint32_t mem_type);
void restore_mtrrs(const mtrr_state_t *saved_state);
bool validate_mtrrs(const mtrr_state_t *saved_state);
#endif /*__TXT_MTRRS_H__ */
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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