1 /* 2 * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <string.h> 9 10 #include <platform_def.h> 11 12 #include <arch.h> 13 #include <arch_helpers.h> 14 #include <common/bl_common.h> 15 #include <common/debug.h> 16 #include <lib/mmio.h> 17 #include <lib/xlat_tables/xlat_tables_v2.h> 18 19 #include <k3_console.h> 20 #include <k3_gicv3.h> 21 #include <ti_sci.h> 22 23 /* Table of regions to map using the MMU */ 24 const mmap_region_t plat_k3_mmap[] = { 25 MAP_REGION_FLAT(K3_USART_BASE, K3_USART_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 26 MAP_REGION_FLAT(K3_GIC_BASE, K3_GIC_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 27 MAP_REGION_FLAT(K3_GTC_BASE, K3_GTC_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 28 MAP_REGION_FLAT(SEC_PROXY_RT_BASE, SEC_PROXY_RT_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 29 MAP_REGION_FLAT(SEC_PROXY_SCFG_BASE, SEC_PROXY_SCFG_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 30 MAP_REGION_FLAT(SEC_PROXY_DATA_BASE, SEC_PROXY_DATA_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 31 { /* sentinel */ } 32 }; 33 34 /* 35 * Placeholder variables for maintaining information about the next image(s) 36 */ 37 static entry_point_info_t bl32_image_ep_info; 38 static entry_point_info_t bl33_image_ep_info; 39 40 /******************************************************************************* 41 * Gets SPSR for BL33 entry 42 ******************************************************************************/ 43 static uint32_t k3_get_spsr_for_bl33_entry(void) 44 { 45 unsigned long el_status; 46 unsigned int mode; 47 uint32_t spsr; 48 49 /* Figure out what mode we enter the non-secure world in */ 50 el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT; 51 el_status &= ID_AA64PFR0_ELX_MASK; 52 53 mode = (el_status) ? MODE_EL2 : MODE_EL1; 54 55 spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS); 56 return spsr; 57 } 58 59 /******************************************************************************* 60 * Perform any BL3-1 early platform setup, such as console init and deciding on 61 * memory layout. 62 ******************************************************************************/ 63 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 64 u_register_t arg2, u_register_t arg3) 65 { 66 /* There are no parameters from BL2 if BL31 is a reset vector */ 67 assert(arg0 == 0U); 68 assert(arg1 == 0U); 69 70 bl31_console_setup(); 71 72 #ifdef BL32_BASE 73 /* Populate entry point information for BL32 */ 74 SET_PARAM_HEAD(&bl32_image_ep_info, PARAM_EP, VERSION_1, 0); 75 bl32_image_ep_info.pc = BL32_BASE; 76 bl32_image_ep_info.spsr = SPSR_64(MODE_EL1, MODE_SP_ELX, 77 DISABLE_ALL_EXCEPTIONS); 78 SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE); 79 #endif 80 81 /* Populate entry point information for BL33 */ 82 SET_PARAM_HEAD(&bl33_image_ep_info, PARAM_EP, VERSION_1, 0); 83 bl33_image_ep_info.pc = PRELOADED_BL33_BASE; 84 bl33_image_ep_info.spsr = k3_get_spsr_for_bl33_entry(); 85 SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE); 86 87 #ifdef K3_HW_CONFIG_BASE 88 /* 89 * According to the file ``Documentation/arm64/booting.txt`` of the 90 * Linux kernel tree, Linux expects the physical address of the device 91 * tree blob (DTB) in x0, while x1-x3 are reserved for future use and 92 * must be 0. 93 */ 94 bl33_image_ep_info.args.arg0 = (u_register_t)K3_HW_CONFIG_BASE; 95 bl33_image_ep_info.args.arg1 = 0U; 96 bl33_image_ep_info.args.arg2 = 0U; 97 bl33_image_ep_info.args.arg3 = 0U; 98 #endif 99 } 100 101 void bl31_plat_arch_setup(void) 102 { 103 const mmap_region_t bl_regions[] = { 104 MAP_REGION_FLAT(BL31_START, BL31_END - BL31_START, MT_MEMORY | MT_RW | MT_SECURE), 105 MAP_REGION_FLAT(BL_CODE_BASE, BL_CODE_END - BL_CODE_BASE, MT_CODE | MT_RO | MT_SECURE), 106 MAP_REGION_FLAT(BL_RO_DATA_BASE, BL_RO_DATA_END - BL_RO_DATA_BASE, MT_RO_DATA | MT_RO | MT_SECURE), 107 #if USE_COHERENT_MEM 108 MAP_REGION_FLAT(BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE, MT_DEVICE | MT_RW | MT_SECURE), 109 #endif 110 { /* sentinel */ } 111 }; 112 113 setup_page_tables(bl_regions, plat_k3_mmap); 114 enable_mmu_el3(0); 115 } 116 117 void bl31_platform_setup(void) 118 { 119 k3_gic_driver_init(K3_GIC_BASE); 120 k3_gic_init(); 121 122 ti_sci_init(); 123 } 124 125 void platform_mem_init(void) 126 { 127 /* Do nothing for now... */ 128 } 129 130 unsigned int plat_get_syscnt_freq2(void) 131 { 132 uint32_t gtc_freq; 133 uint32_t gtc_ctrl; 134 135 /* Lets try and provide basic diagnostics - cost is low */ 136 gtc_ctrl = mmio_read_32(K3_GTC_BASE + K3_GTC_CNTCR_OFFSET); 137 /* Did the bootloader fail to enable timer and OS guys are confused? */ 138 if ((gtc_ctrl & K3_GTC_CNTCR_EN_MASK) == 0U) { 139 ERROR("GTC is disabled! Timekeeping broken. Fix Bootloader\n"); 140 } 141 /* 142 * If debug will not pause time, we will have issues like 143 * drivers timing out while debugging, in cases of OS like Linux, 144 * RCU stall errors, which can be hard to differentiate vs real issues. 145 */ 146 if ((gtc_ctrl & K3_GTC_CNTCR_HDBG_MASK) == 0U) { 147 WARN("GTC: Debug access doesn't stop time. Fix Bootloader\n"); 148 } 149 150 gtc_freq = mmio_read_32(K3_GTC_BASE + K3_GTC_CNTFID0_OFFSET); 151 /* Many older bootloaders may have missed programming FID0 register */ 152 if (gtc_freq != 0U) { 153 return gtc_freq; 154 } 155 156 /* 157 * We could have just warned about this, but this can have serious 158 * hard to debug side effects if we are NOT sure what the actual 159 * frequency is. Lets make sure people don't miss this. 160 */ 161 ERROR("GTC_CNTFID0 is 0! Assuming %d Hz. Fix Bootloader\n", 162 SYS_COUNTER_FREQ_IN_TICKS); 163 164 return SYS_COUNTER_FREQ_IN_TICKS; 165 } 166 167 /* 168 * Empty function to prevent the console from being uninitialized after BL33 is 169 * started and allow us to see messages from BL31. 170 */ 171 void bl31_plat_runtime_setup(void) 172 { 173 } 174 175 /******************************************************************************* 176 * Return a pointer to the 'entry_point_info' structure of the next image 177 * for the security state specified. BL3-3 corresponds to the non-secure 178 * image type while BL3-2 corresponds to the secure image type. A NULL 179 * pointer is returned if the image does not exist. 180 ******************************************************************************/ 181 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 182 { 183 entry_point_info_t *next_image_info; 184 185 assert(sec_state_is_valid(type)); 186 next_image_info = (type == NON_SECURE) ? &bl33_image_ep_info : 187 &bl32_image_ep_info; 188 /* 189 * None of the images on the ARM development platforms can have 0x0 190 * as the entrypoint 191 */ 192 if (next_image_info->pc) 193 return next_image_info; 194 195 NOTICE("Requested nonexistent image\n"); 196 return NULL; 197 } 198