1 /* 2 * Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <common/bl_common.h> 10 #include <drivers/arm/pl061_gpio.h> 11 #include <plat/common/platform.h> 12 13 #include "qemu_private.h" 14 15 #define MAP_BL31_TOTAL MAP_REGION_FLAT( \ 16 BL31_BASE, \ 17 BL31_END - BL31_BASE, \ 18 MT_MEMORY | MT_RW | EL3_PAS) 19 #define MAP_BL31_RO MAP_REGION_FLAT( \ 20 BL_CODE_BASE, \ 21 BL_CODE_END - BL_CODE_BASE, \ 22 MT_CODE | EL3_PAS), \ 23 MAP_REGION_FLAT( \ 24 BL_RO_DATA_BASE, \ 25 BL_RO_DATA_END \ 26 - BL_RO_DATA_BASE, \ 27 MT_RO_DATA | EL3_PAS) 28 29 #if USE_COHERENT_MEM 30 #define MAP_BL_COHERENT_RAM MAP_REGION_FLAT( \ 31 BL_COHERENT_RAM_BASE, \ 32 BL_COHERENT_RAM_END \ 33 - BL_COHERENT_RAM_BASE, \ 34 MT_DEVICE | MT_RW | EL3_PAS) 35 #endif 36 37 /* 38 * Placeholder variables for copying the arguments that have been passed to 39 * BL3-1 from BL2. 40 */ 41 static entry_point_info_t bl32_image_ep_info; 42 static entry_point_info_t bl33_image_ep_info; 43 44 /******************************************************************************* 45 * Perform any BL3-1 early platform setup. Here is an opportunity to copy 46 * parameters passed by the calling EL (S-EL1 in BL2 & EL3 in BL1) before 47 * they are lost (potentially). This needs to be done before the MMU is 48 * initialized so that the memory layout can be used while creating page 49 * tables. BL2 has flushed this information to memory, so we are guaranteed 50 * to pick up good data. 51 ******************************************************************************/ 52 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 53 u_register_t arg2, u_register_t arg3) 54 { 55 /* Initialize the console to provide early debug support */ 56 qemu_console_init(); 57 58 /* Platform names have to be lowercase. */ 59 #ifdef PLAT_qemu_sbsa 60 sip_svc_init(); 61 #endif 62 63 /* 64 * Check params passed from BL2 65 */ 66 bl_params_t *params_from_bl2 = (bl_params_t *)arg0; 67 68 assert(params_from_bl2); 69 assert(params_from_bl2->h.type == PARAM_BL_PARAMS); 70 assert(params_from_bl2->h.version >= VERSION_2); 71 72 bl_params_node_t *bl_params = params_from_bl2->head; 73 74 /* 75 * Copy BL33 and BL32 (if present), entry point information. 76 * They are stored in Secure RAM, in BL2's address space. 77 */ 78 while (bl_params) { 79 if (bl_params->image_id == BL32_IMAGE_ID) 80 bl32_image_ep_info = *bl_params->ep_info; 81 82 if (bl_params->image_id == BL33_IMAGE_ID) 83 bl33_image_ep_info = *bl_params->ep_info; 84 85 bl_params = bl_params->next_params_info; 86 } 87 88 if (!bl33_image_ep_info.pc) 89 panic(); 90 } 91 92 void bl31_plat_arch_setup(void) 93 { 94 const mmap_region_t bl_regions[] = { 95 MAP_BL31_TOTAL, 96 MAP_BL31_RO, 97 #if USE_COHERENT_MEM 98 MAP_BL_COHERENT_RAM, 99 #endif 100 {0} 101 }; 102 103 setup_page_tables(bl_regions, plat_qemu_get_mmap()); 104 105 enable_mmu_el3(0); 106 } 107 108 static void qemu_gpio_init(void) 109 { 110 #ifdef SECURE_GPIO_BASE 111 pl061_gpio_init(); 112 pl061_gpio_register(SECURE_GPIO_BASE, 0); 113 #endif 114 } 115 116 void bl31_platform_setup(void) 117 { 118 plat_qemu_gic_init(); 119 qemu_gpio_init(); 120 } 121 122 unsigned int plat_get_syscnt_freq2(void) 123 { 124 return SYS_COUNTER_FREQ_IN_TICKS; 125 } 126 127 /******************************************************************************* 128 * Return a pointer to the 'entry_point_info' structure of the next image 129 * for the security state specified. BL3-3 corresponds to the non-secure 130 * image type while BL3-2 corresponds to the secure image type. A NULL 131 * pointer is returned if the image does not exist. 132 ******************************************************************************/ 133 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 134 { 135 entry_point_info_t *next_image_info; 136 137 assert(sec_state_is_valid(type)); 138 next_image_info = (type == NON_SECURE) 139 ? &bl33_image_ep_info : &bl32_image_ep_info; 140 /* 141 * None of the images on the ARM development platforms can have 0x0 142 * as the entrypoint 143 */ 144 if (next_image_info->pc) 145 return next_image_info; 146 else 147 return NULL; 148 } 149