1 /* 2 * Copyright (c) 2020-2024, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <libfdt.h> 10 #include <tc_plat.h> 11 12 #include <arch_helpers.h> 13 #include <common/bl_common.h> 14 #include <common/debug.h> 15 #include <drivers/arm/css/css_mhu_doorbell.h> 16 #include <drivers/arm/css/scmi.h> 17 #include <drivers/arm/sbsa.h> 18 #include <lib/fconf/fconf.h> 19 #include <lib/fconf/fconf_dyn_cfg_getter.h> 20 #include <plat/arm/common/plat_arm.h> 21 #include <plat/common/platform.h> 22 23 #ifdef PLATFORM_TEST_TFM_TESTSUITE 24 #include <psa/crypto_platform.h> 25 #include <psa/crypto_types.h> 26 #include <psa/crypto_values.h> 27 #endif /* PLATFORM_TEST_TFM_TESTSUITE */ 28 29 #ifdef PLATFORM_TEST_TFM_TESTSUITE 30 /* 31 * We pretend using an external RNG (through MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG 32 * mbedTLS config option) so we need to provide an implementation of 33 * mbedtls_psa_external_get_random(). Provide a fake one, since we do not 34 * actually use any of external RNG and this function is only needed during 35 * the execution of TF-M testsuite during exporting the public part of the 36 * delegated attestation key. 37 */ 38 psa_status_t mbedtls_psa_external_get_random( 39 mbedtls_psa_external_random_context_t *context, 40 uint8_t *output, size_t output_size, 41 size_t *output_length) 42 { 43 for (size_t i = 0U; i < output_size; i++) { 44 output[i] = (uint8_t)(read_cntpct_el0() & 0xFFU); 45 } 46 47 *output_length = output_size; 48 49 return PSA_SUCCESS; 50 } 51 #endif /* PLATFORM_TEST_TFM_TESTSUITE */ 52 53 static scmi_channel_plat_info_t tc_scmi_plat_info[] = { 54 { 55 .scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE, 56 .db_reg_addr = PLAT_CSS_MHU_BASE + SENDER_REG_SET(0), 57 .db_preserve_mask = 0xfffffffe, 58 .db_modify_mask = 0x1, 59 .ring_doorbell = &mhuv2_ring_doorbell, 60 } 61 }; 62 63 void bl31_platform_setup(void) 64 { 65 tc_bl31_common_platform_setup(); 66 } 67 68 scmi_channel_plat_info_t *plat_css_get_scmi_info(unsigned int channel_id) 69 { 70 71 return &tc_scmi_plat_info[channel_id]; 72 73 } 74 75 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 76 u_register_t arg2, u_register_t arg3) 77 { 78 /* 79 * Pass the hw_config to BL33 in R0. You'll notice that 80 * arm_bl31_early_platform_setup does something similar but only behind 81 * ARM_LINUX_KERNEL_AS_BL33 and we want to pass the DTB even to a 82 * bootloader. Lucky for us, it copies the ep_info BL2 gave us to BL33 83 * unconditionally in the generic case so hijack that. 84 * TODO: this goes away with firmware handoff when it will be proper 85 */ 86 87 bl_params_node_t *bl_params = ((bl_params_t *)arg0)->head; 88 89 while (bl_params != NULL) { 90 if (bl_params->image_id == BL33_IMAGE_ID) { 91 bl_params->ep_info->args.arg0 = arg2; 92 break; 93 } 94 bl_params = bl_params->next_params_info; 95 } 96 97 arm_bl31_early_platform_setup((void *)arg0, arg1, arg2, (void *)arg3); 98 99 /* Fill the properties struct with the info from the config dtb */ 100 fconf_populate("FW_CONFIG", arg1); 101 } 102 103 #ifdef PLATFORM_TESTS 104 static __dead2 void tc_run_platform_tests(void) 105 { 106 int tests_failed; 107 108 printf("\nStarting platform tests...\n"); 109 110 #ifdef PLATFORM_TEST_NV_COUNTERS 111 tests_failed = nv_counter_test(); 112 #elif PLATFORM_TEST_ROTPK 113 tests_failed = rotpk_test(); 114 #elif PLATFORM_TEST_TFM_TESTSUITE 115 tests_failed = run_platform_tests(); 116 #endif 117 118 printf("Platform tests %s.\n", 119 (tests_failed != 0) ? "failed" : "succeeded"); 120 121 /* Suspend booting, no matter the tests outcome. */ 122 printf("Suspend booting...\n"); 123 plat_error_handler(-1); 124 } 125 #endif 126 127 void tc_bl31_common_platform_setup(void) 128 { 129 arm_bl31_platform_setup(); 130 131 #ifdef PLATFORM_TESTS 132 tc_run_platform_tests(); 133 #endif 134 } 135 136 const plat_psci_ops_t *plat_arm_psci_override_pm_ops(plat_psci_ops_t *ops) 137 { 138 return css_scmi_override_pm_ops(ops); 139 } 140 141 void __init bl31_plat_arch_setup(void) 142 { 143 arm_bl31_plat_arch_setup(); 144 145 /* HW_CONFIG was also loaded by BL2 */ 146 const struct dyn_cfg_dtb_info_t *hw_config_info; 147 148 hw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, HW_CONFIG_ID); 149 assert(hw_config_info != NULL); 150 151 fconf_populate("HW_CONFIG", hw_config_info->config_addr); 152 } 153 154 #if defined(SPD_spmd) && (SPMC_AT_EL3 == 0) 155 void tc_bl31_plat_runtime_setup(void) 156 { 157 /* Start secure watchdog timer. */ 158 plat_arm_secure_wdt_start(); 159 160 arm_bl31_plat_runtime_setup(); 161 } 162 163 void bl31_plat_runtime_setup(void) 164 { 165 tc_bl31_plat_runtime_setup(); 166 } 167 168 /* 169 * Platform handler for Group0 secure interrupt. 170 */ 171 int plat_spmd_handle_group0_interrupt(uint32_t intid) 172 { 173 /* Trusted Watchdog timer is the only source of Group0 interrupt now. */ 174 if (intid == SBSA_SECURE_WDOG_INTID) { 175 /* Refresh the timer. */ 176 plat_arm_secure_wdt_refresh(); 177 178 return 0; 179 } 180 181 return -1; 182 } 183 #endif /*defined(SPD_spmd) && (SPMC_AT_EL3 == 0)*/ 184