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Diffstat (limited to 'tboot/include/txt/mtrrs.h')
| -rw-r--r-- | tboot/include/txt/mtrrs.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/tboot/include/txt/mtrrs.h b/tboot/include/txt/mtrrs.h new file mode 100644 index 0000000..8b61f6e --- /dev/null +++ b/tboot/include/txt/mtrrs.h @@ -0,0 +1,149 @@ +/* + * 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: + */ |