1 /* 2 * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch.h> 8 #include <arch_helpers.h> 9 #include <assert.h> 10 #include <common/bl_common.h> 11 #include <context.h> 12 #include <lib/el3_runtime/context_mgmt.h> 13 #include <common/debug.h> 14 #include <denver.h> 15 #include <mce.h> 16 #include <mce_private.h> 17 #include <platform_def.h> 18 #include <stdbool.h> 19 #include <string.h> 20 #include <errno.h> 21 #include <t194_nvg.h> 22 #include <tegra_def.h> 23 #include <tegra_platform.h> 24 #include <tegra_private.h> 25 26 /* Handler to check if MCE firmware is supported */ 27 static bool mce_firmware_not_supported(void) 28 { 29 bool status; 30 31 /* these platforms do not load MCE firmware */ 32 status = tegra_platform_is_linsim() || tegra_platform_is_qt() || 33 tegra_platform_is_virt_dev_kit(); 34 35 return status; 36 } 37 38 /******************************************************************************* 39 * Common handler for all MCE commands 40 ******************************************************************************/ 41 int32_t mce_command_handler(uint64_t cmd, uint64_t arg0, uint64_t arg1, 42 uint64_t arg2) 43 { 44 int32_t ret = 0; 45 46 switch (cmd) { 47 case (uint64_t)MCE_CMD_ENTER_CSTATE: 48 ret = nvg_enter_cstate((uint32_t)arg0, (uint32_t)arg1); 49 if (ret < 0) { 50 ERROR("%s: enter_cstate failed(%d)\n", __func__, ret); 51 } 52 53 break; 54 55 case (uint64_t)MCE_CMD_IS_SC7_ALLOWED: 56 ret = nvg_is_sc7_allowed(); 57 if (ret < 0) { 58 ERROR("%s: is_sc7_allowed failed(%d)\n", __func__, ret); 59 } 60 61 break; 62 63 case (uint64_t)MCE_CMD_ONLINE_CORE: 64 ret = nvg_online_core((uint32_t)arg0); 65 if (ret < 0) { 66 ERROR("%s: online_core failed(%d)\n", __func__, ret); 67 } 68 69 break; 70 71 default: 72 ERROR("unknown MCE command (%llu)\n", cmd); 73 ret = -EINVAL; 74 break; 75 } 76 77 return ret; 78 } 79 80 /******************************************************************************* 81 * Handler to update carveout values for Video Memory Carveout region 82 ******************************************************************************/ 83 int32_t mce_update_gsc_videomem(void) 84 { 85 int32_t ret; 86 87 /* 88 * MCE firmware is not running on simulation platforms. 89 */ 90 if (mce_firmware_not_supported()) { 91 ret = -EINVAL; 92 } else { 93 ret = nvg_update_ccplex_gsc((uint32_t)TEGRA_NVG_CHANNEL_UPDATE_GSC_VPR); 94 } 95 96 return ret; 97 } 98 99 /******************************************************************************* 100 * Handler to update carveout values for TZDRAM aperture 101 ******************************************************************************/ 102 int32_t mce_update_gsc_tzdram(void) 103 { 104 int32_t ret; 105 106 /* 107 * MCE firmware is not running on simulation platforms. 108 */ 109 if (mce_firmware_not_supported()) { 110 ret = -EINVAL; 111 } else { 112 ret = nvg_update_ccplex_gsc((uint32_t)TEGRA_NVG_CHANNEL_UPDATE_GSC_TZ_DRAM); 113 } 114 115 return ret; 116 } 117 118 /******************************************************************************* 119 * Handler to update carveout values for TZ SysRAM aperture 120 ******************************************************************************/ 121 int32_t mce_update_gsc_tzram(void) 122 { 123 int32_t ret; 124 125 /* 126 * MCE firmware is not running on simulation platforms. 127 */ 128 if (mce_firmware_not_supported()) { 129 ret = -EINVAL; 130 } else { 131 ret = nvg_update_ccplex_gsc((uint32_t)TEGRA_NVG_CHANNEL_UPDATE_GSC_TZRAM); 132 } 133 134 return ret; 135 } 136 137 /******************************************************************************* 138 * Handler to issue the UPDATE_CSTATE_INFO request 139 ******************************************************************************/ 140 void mce_update_cstate_info(const mce_cstate_info_t *cstate) 141 { 142 /* issue the UPDATE_CSTATE_INFO request */ 143 nvg_update_cstate_info(cstate->cluster, cstate->ccplex, cstate->system, 144 cstate->wake_mask, cstate->update_wake_mask); 145 } 146 147 /******************************************************************************* 148 * Handler to read the MCE firmware version and check if it is compatible 149 * with interface header the BL3-1 was compiled against 150 ******************************************************************************/ 151 void mce_verify_firmware_version(void) 152 { 153 uint64_t version; 154 uint32_t major, minor; 155 156 /* 157 * MCE firmware is not running on simulation platforms. 158 */ 159 if (mce_firmware_not_supported()) { 160 return; 161 } 162 163 /* 164 * Read the MCE firmware version and extract the major and minor 165 * version fields 166 */ 167 version = nvg_get_version(); 168 minor = (uint32_t)version; 169 major = (uint32_t)(version >> 32); 170 171 INFO("MCE Version - HW=%u:%u, SW=%u:%u\n", major, minor, 172 TEGRA_NVG_VERSION_MAJOR, TEGRA_NVG_VERSION_MINOR); 173 174 /* 175 * Verify that the MCE firmware version and the interface header 176 * match 177 */ 178 if (major != (uint32_t)TEGRA_NVG_VERSION_MAJOR) { 179 ERROR("MCE major version mismatch\n"); 180 panic(); 181 } 182 183 if (minor < (uint32_t)TEGRA_NVG_VERSION_MINOR) { 184 ERROR("MCE minor version mismatch\n"); 185 panic(); 186 } 187 } 188 189 /******************************************************************************* 190 * Handler to enable the strict checking mode 191 ******************************************************************************/ 192 void mce_enable_strict_checking(void) 193 { 194 uint64_t sctlr = read_sctlr_el3(); 195 int32_t ret = 0; 196 197 if (tegra_platform_is_silicon() || tegra_platform_is_fpga()) { 198 /* 199 * Step1: TZ-DRAM and TZRAM should be setup before the MMU is 200 * enabled. 201 * 202 * The common code makes sure that TZDRAM/TZRAM are already 203 * enabled before calling into this handler. If this is not the 204 * case, the following sequence must be executed before moving 205 * on to step 2. 206 * 207 * tlbialle1is(); 208 * tlbialle3is(); 209 * dsbsy(); 210 * isb(); 211 * 212 */ 213 if ((sctlr & (uint64_t)SCTLR_M_BIT) == (uint64_t)SCTLR_M_BIT) { 214 tlbialle1is(); 215 tlbialle3is(); 216 dsbsy(); 217 isb(); 218 } 219 220 /* 221 * Step2: SCF flush - Clean and invalidate caches and clear the 222 * TR-bits 223 */ 224 ret = nvg_roc_clean_cache_trbits(); 225 if (ret < 0) { 226 ERROR("%s: flush cache_trbits failed(%d)\n", __func__, 227 ret); 228 return; 229 } 230 231 /* 232 * Step3: Issue the SECURITY_CONFIG request to MCE to enable 233 * strict checking mode. 234 */ 235 nvg_enable_strict_checking_mode(); 236 } 237 } 238