Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2015 Intel Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #include <arch/cpu.h> |
| 17 | #include <console/console.h> |
| 18 | #include <cpu/x86/msr.h> |
| 19 | #include <cpu/x86/mtrr.h> |
| 20 | #include <soc/intel/common/util.h> |
| 21 | #include <stddef.h> |
| 22 | |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 23 | uint32_t soc_get_variable_mtrr_count(uint64_t *msr) |
| 24 | { |
| 25 | union { |
| 26 | uint64_t u64; |
| 27 | msr_t s; |
| 28 | } mttrcap; |
| 29 | |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 30 | mttrcap.s = rdmsr(MTRR_CAP_MSR); |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 31 | if (msr != NULL) |
| 32 | *msr = mttrcap.u64; |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 33 | return mttrcap.u64 & MTRR_CAP_VCNT; |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | static const char *soc_display_mtrr_type(uint32_t type) |
| 37 | { |
| 38 | switch (type) { |
| 39 | default: return "reserved"; |
| 40 | case 0: return "UC"; |
| 41 | case 1: return "WC"; |
| 42 | case 4: return "WT"; |
| 43 | case 5: return "WP"; |
| 44 | case 6: return "WB"; |
| 45 | case 7: return "UC-"; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | static void soc_display_mtrr_fixed_types(uint64_t msr, |
| 50 | uint32_t starting_address, uint32_t memory_size) |
| 51 | { |
| 52 | uint32_t base_address; |
| 53 | uint32_t index; |
| 54 | uint32_t next_address; |
| 55 | uint32_t next_type; |
| 56 | uint32_t type; |
| 57 | |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 58 | type = msr & MTRR_DEF_TYPE_MASK; |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 59 | base_address = starting_address; |
| 60 | next_address = base_address; |
| 61 | for (index = 0; index < 64; index += 8) { |
| 62 | next_address = starting_address + (memory_size * |
| 63 | ((index >> 3) + 1)); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 64 | next_type = (msr >> index) & MTRR_DEF_TYPE_MASK; |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 65 | if (next_type != type) { |
| 66 | printk(BIOS_DEBUG, " 0x%08x - 0x%08x: %s\n", |
| 67 | base_address, next_address - 1, |
| 68 | soc_display_mtrr_type(type)); |
| 69 | base_address = next_address; |
| 70 | type = next_type; |
| 71 | } |
| 72 | } |
| 73 | if (base_address != next_address) |
| 74 | printk(BIOS_DEBUG, " 0x%08x - 0x%08x: %s\n", |
| 75 | base_address, next_address - 1, |
| 76 | soc_display_mtrr_type(type)); |
| 77 | } |
| 78 | |
| 79 | static void soc_display_4k_mtrr(uint32_t msr_reg, uint32_t starting_address, |
| 80 | const char *name) |
| 81 | { |
| 82 | union { |
| 83 | uint64_t u64; |
| 84 | msr_t s; |
| 85 | } msr; |
| 86 | |
| 87 | msr.s = rdmsr(msr_reg); |
| 88 | printk(BIOS_DEBUG, "0x%016llx: %s\n", msr.u64, name); |
| 89 | soc_display_mtrr_fixed_types(msr.u64, starting_address, 0x1000); |
| 90 | } |
| 91 | |
| 92 | static void soc_display_16k_mtrr(uint32_t msr_reg, uint32_t starting_address, |
| 93 | const char *name) |
| 94 | { |
| 95 | union { |
| 96 | uint64_t u64; |
| 97 | msr_t s; |
| 98 | } msr; |
| 99 | |
| 100 | msr.s = rdmsr(msr_reg); |
| 101 | printk(BIOS_DEBUG, "0x%016llx: %s\n", msr.u64, name); |
| 102 | soc_display_mtrr_fixed_types(msr.u64, starting_address, 0x4000); |
| 103 | } |
| 104 | |
| 105 | static void soc_display_64k_mtrr(void) |
| 106 | { |
| 107 | union { |
| 108 | uint64_t u64; |
| 109 | msr_t s; |
| 110 | } msr; |
| 111 | |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 112 | msr.s = rdmsr(MTRR_FIX_64K_00000); |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 113 | printk(BIOS_DEBUG, "0x%016llx: IA32_MTRR_FIX64K_00000\n", msr.u64); |
| 114 | soc_display_mtrr_fixed_types(msr.u64, 0, 0x10000); |
| 115 | } |
| 116 | |
| 117 | static uint32_t soc_display_mtrrcap(void) |
| 118 | { |
| 119 | uint64_t msr; |
| 120 | uint32_t variable_mtrrs; |
| 121 | |
| 122 | variable_mtrrs = soc_get_variable_mtrr_count(&msr); |
| 123 | printk(BIOS_DEBUG, |
| 124 | "0x%016llx: IA32_MTRRCAP: %s%s%s%d variable MTRRs\n", |
| 125 | msr, |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 126 | (msr & MTRR_CAP_SMRR) ? "SMRR, " : "", |
| 127 | (msr & MTRR_CAP_WC) ? "WC, " : "", |
| 128 | (msr & MTRR_CAP_FIX) ? "FIX, " : "", |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 129 | variable_mtrrs); |
| 130 | return variable_mtrrs; |
| 131 | } |
| 132 | |
| 133 | static void soc_display_mtrr_def_type(void) |
| 134 | { |
| 135 | union { |
| 136 | uint64_t u64; |
| 137 | msr_t s; |
| 138 | } msr; |
| 139 | |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 140 | msr.s = rdmsr(MTRR_DEF_TYPE_MSR); |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 141 | printk(BIOS_DEBUG, "0x%016llx: IA32_MTRR_DEF_TYPE:%s%s %s\n", |
| 142 | msr.u64, |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 143 | (msr.u64 & MTRR_DEF_TYPE_EN) ? " E," : "", |
| 144 | (msr.u64 & MTRR_DEF_TYPE_FIX_EN) ? " FE," : "", |
| 145 | soc_display_mtrr_type((uint32_t)(msr.u64 & MTRR_DEF_TYPE_MASK))); |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | static void soc_display_variable_mtrr(uint32_t msr_reg, int index, |
| 149 | uint64_t address_mask) |
| 150 | { |
| 151 | uint64_t base_address; |
| 152 | uint64_t length; |
| 153 | uint64_t mask; |
| 154 | union { |
| 155 | uint64_t u64; |
| 156 | msr_t s; |
| 157 | } msr_a; |
| 158 | union { |
| 159 | uint64_t u64; |
| 160 | msr_t s; |
| 161 | } msr_m; |
| 162 | |
| 163 | msr_a.s = rdmsr(msr_reg); |
| 164 | msr_m.s = rdmsr(msr_reg + 1); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 165 | if (msr_m.u64 & MTRR_PHYS_MASK_VALID) { |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 166 | base_address = (msr_a.u64 & 0xfffffffffffff000ULL) |
| 167 | & address_mask; |
| 168 | printk(BIOS_DEBUG, |
| 169 | "0x%016llx: PHYBASE%d: Address = 0x%016llx, %s\n", |
| 170 | msr_a.u64, index, base_address, |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 171 | soc_display_mtrr_type(msr_a.u64 & MTRR_DEF_TYPE_MASK)); |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 172 | mask = (msr_m.u64 & 0xfffffffffffff000ULL) & address_mask; |
| 173 | length = (~mask & address_mask) + 1; |
| 174 | printk(BIOS_DEBUG, |
| 175 | "0x%016llx: PHYMASK%d: Length = 0x%016llx, Valid\n", |
| 176 | msr_m.u64, index, length); |
| 177 | } else { |
| 178 | printk(BIOS_DEBUG, "0x%016llx: PHYBASE%d\n", msr_a.u64, index); |
| 179 | printk(BIOS_DEBUG, "0x%016llx: PHYMASK%d: Disabled\n", |
| 180 | msr_m.u64, index); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | asmlinkage void soc_display_mtrrs(void) |
| 185 | { |
| 186 | if (IS_ENABLED(CONFIG_DISPLAY_MTRRS)) { |
| 187 | uint32_t address_bits; |
| 188 | uint64_t address_mask; |
| 189 | int i; |
| 190 | int variable_mtrrs; |
| 191 | |
| 192 | /* Display the fixed MTRRs */ |
| 193 | variable_mtrrs = soc_display_mtrrcap(); |
| 194 | soc_display_mtrr_def_type(); |
| 195 | soc_display_64k_mtrr(); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 196 | soc_display_16k_mtrr(MTRR_FIX_16K_80000, 0x80000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 197 | "IA32_MTRR_FIX16K_80000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 198 | soc_display_16k_mtrr(MTRR_FIX_16K_A0000, 0xa0000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 199 | "IA32_MTRR_FIX16K_A0000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 200 | soc_display_4k_mtrr(MTRR_FIX_4K_C0000, 0xc0000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 201 | "IA32_MTRR_FIX4K_C0000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 202 | soc_display_4k_mtrr(MTRR_FIX_4K_C8000, 0xc8000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 203 | "IA32_MTRR_FIX4K_C8000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 204 | soc_display_4k_mtrr(MTRR_FIX_4K_D0000, 0xd0000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 205 | "IA32_MTRR_FIX4K_D0000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 206 | soc_display_4k_mtrr(MTRR_FIX_4K_D8000, 0xd8000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 207 | "IA32_MTRR_FIX4K_D8000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 208 | soc_display_4k_mtrr(MTRR_FIX_4K_E0000, 0xe0000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 209 | "IA32_MTRR_FIX4K_E0000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 210 | soc_display_4k_mtrr(MTRR_FIX_4K_E8000, 0xe8000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 211 | "IA32_MTRR_FIX4K_E8000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 212 | soc_display_4k_mtrr(MTRR_FIX_4K_F0000, 0xf0000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 213 | "IA32_MTRR_FIX4K_F0000"); |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 214 | soc_display_4k_mtrr(MTRR_FIX_4K_F8000, 0xf8000, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 215 | "IA32_MTRR_FIX4K_F8000"); |
| 216 | address_bits = cpu_phys_address_size(); |
| 217 | address_mask = (1ULL << address_bits) - 1; |
| 218 | |
| 219 | /* Display the variable MTRRs */ |
| 220 | for (i = 0; i < variable_mtrrs; i++) |
Alexandru Gagniuc | 86091f9 | 2015-09-30 20:23:09 -0700 | [diff] [blame] | 221 | soc_display_variable_mtrr(MTRR_PHYS_BASE(i), i, |
Lee Leahy | 0946ec3 | 2015-04-20 15:24:54 -0700 | [diff] [blame] | 222 | address_mask); |
| 223 | } |
| 224 | } |