1 /* 2 * Copyright (c) 2015-2019, 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 /* 59 * Check params passed from BL2 60 */ 61 bl_params_t *params_from_bl2 = (bl_params_t *)arg0; 62 63 assert(params_from_bl2); 64 assert(params_from_bl2->h.type == PARAM_BL_PARAMS); 65 assert(params_from_bl2->h.version >= VERSION_2); 66 67 bl_params_node_t *bl_params = params_from_bl2->head; 68 69 /* 70 * Copy BL33 and BL32 (if present), entry point information. 71 * They are stored in Secure RAM, in BL2's address space. 72 */ 73 while (bl_params) { 74 if (bl_params->image_id == BL32_IMAGE_ID) 75 bl32_image_ep_info = *bl_params->ep_info; 76 77 if (bl_params->image_id == BL33_IMAGE_ID) 78 bl33_image_ep_info = *bl_params->ep_info; 79 80 bl_params = bl_params->next_params_info; 81 } 82 83 if (!bl33_image_ep_info.pc) 84 panic(); 85 } 86 87 void bl31_plat_arch_setup(void) 88 { 89 const mmap_region_t bl_regions[] = { 90 MAP_BL31_TOTAL, 91 MAP_BL31_RO, 92 #if USE_COHERENT_MEM 93 MAP_BL_COHERENT_RAM, 94 #endif 95 {0} 96 }; 97 98 setup_page_tables(bl_regions, plat_qemu_get_mmap()); 99 100 enable_mmu_el3(0); 101 } 102 103 static void qemu_gpio_init(void) 104 { 105 #ifdef SECURE_GPIO_BASE 106 pl061_gpio_init(); 107 pl061_gpio_register(SECURE_GPIO_BASE, 0); 108 #endif 109 } 110 111 void bl31_platform_setup(void) 112 { 113 plat_qemu_gic_init(); 114 qemu_gpio_init(); 115 } 116 117 unsigned int plat_get_syscnt_freq2(void) 118 { 119 return SYS_COUNTER_FREQ_IN_TICKS; 120 } 121 122 /******************************************************************************* 123 * Return a pointer to the 'entry_point_info' structure of the next image 124 * for the security state specified. BL3-3 corresponds to the non-secure 125 * image type while BL3-2 corresponds to the secure image type. A NULL 126 * pointer is returned if the image does not exist. 127 ******************************************************************************/ 128 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 129 { 130 entry_point_info_t *next_image_info; 131 132 assert(sec_state_is_valid(type)); 133 next_image_info = (type == NON_SECURE) 134 ? &bl33_image_ep_info : &bl32_image_ep_info; 135 /* 136 * None of the images on the ARM development platforms can have 0x0 137 * as the entrypoint 138 */ 139 if (next_image_info->pc) 140 return next_image_info; 141 else 142 return NULL; 143 } 144