1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <arch.h> 32 #include <arch_helpers.h> 33 #include <assert.h> 34 #include <bl31.h> 35 #include <bl_common.h> 36 #include <console.h> 37 #include <cortex_a57.h> 38 #include <cortex_a53.h> 39 #include <debug.h> 40 #include <errno.h> 41 #include <memctrl.h> 42 #include <mmio.h> 43 #include <platform.h> 44 #include <platform_def.h> 45 #include <stddef.h> 46 #include <tegra_private.h> 47 48 /******************************************************************************* 49 * Declarations of linker defined symbols which will help us find the layout 50 * of trusted SRAM 51 ******************************************************************************/ 52 extern unsigned long __RO_START__; 53 extern unsigned long __RO_END__; 54 extern unsigned long __BL31_END__; 55 56 #if USE_COHERENT_MEM 57 extern unsigned long __COHERENT_RAM_START__; 58 extern unsigned long __COHERENT_RAM_END__; 59 #endif 60 61 extern uint64_t tegra_bl31_phys_base; 62 63 /* 64 * The next 3 constants identify the extents of the code, RO data region and the 65 * limit of the BL3-1 image. These addresses are used by the MMU setup code and 66 * therefore they must be page-aligned. It is the responsibility of the linker 67 * script to ensure that __RO_START__, __RO_END__ & __BL31_END__ linker symbols 68 * refer to page-aligned addresses. 69 */ 70 #define BL31_RO_BASE (unsigned long)(&__RO_START__) 71 #define BL31_RO_LIMIT (unsigned long)(&__RO_END__) 72 #define BL31_END (unsigned long)(&__BL31_END__) 73 74 #if USE_COHERENT_MEM 75 /* 76 * The next 2 constants identify the extents of the coherent memory region. 77 * These addresses are used by the MMU setup code and therefore they must be 78 * page-aligned. It is the responsibility of the linker script to ensure that 79 * __COHERENT_RAM_START__ and __COHERENT_RAM_END__ linker symbols 80 * refer to page-aligned addresses. 81 */ 82 #define BL31_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__) 83 #define BL31_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__) 84 #endif 85 86 static entry_point_info_t bl33_image_ep_info; 87 static plat_params_from_bl2_t plat_bl31_params_from_bl2 = { 88 (uint64_t)TZDRAM_SIZE, (uintptr_t)NULL 89 }; 90 91 /******************************************************************************* 92 * This variable holds the non-secure image entry address 93 ******************************************************************************/ 94 extern uint64_t ns_image_entrypoint; 95 96 /******************************************************************************* 97 * Return a pointer to the 'entry_point_info' structure of the next image for 98 * security state specified. BL33 corresponds to the non-secure image type 99 * while BL32 corresponds to the secure image type. 100 ******************************************************************************/ 101 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 102 { 103 if (type == NON_SECURE) 104 return &bl33_image_ep_info; 105 106 return NULL; 107 } 108 109 /******************************************************************************* 110 * Return a pointer to the 'plat_params_from_bl2_t' structure. The BL2 image 111 * passes this platform specific information. 112 ******************************************************************************/ 113 plat_params_from_bl2_t *bl31_get_plat_params(void) 114 { 115 return &plat_bl31_params_from_bl2; 116 } 117 118 /******************************************************************************* 119 * Perform any BL31 specific platform actions. Populate the BL33 and BL32 image 120 * info. 121 ******************************************************************************/ 122 void bl31_early_platform_setup(bl31_params_t *from_bl2, 123 void *plat_params_from_bl2) 124 { 125 plat_params_from_bl2_t *plat_params = 126 (plat_params_from_bl2_t *)plat_params_from_bl2; 127 128 /* 129 * Configure the UART port to be used as the console 130 */ 131 console_init(TEGRA_BOOT_UART_BASE, TEGRA_BOOT_UART_CLK_IN_HZ, 132 TEGRA_CONSOLE_BAUDRATE); 133 134 /* Initialise crash console */ 135 plat_crash_console_init(); 136 137 /* 138 * Copy BL3-3 entry point information. 139 * They are stored in Secure RAM, in BL2's address space. 140 */ 141 bl33_image_ep_info = *from_bl2->bl33_ep_info; 142 143 /* 144 * Parse platform specific parameters - TZDRAM aperture size and 145 * pointer to BL32 params. 146 */ 147 if (plat_params) { 148 plat_bl31_params_from_bl2.tzdram_size = plat_params->tzdram_size; 149 plat_bl31_params_from_bl2.bl32_params = plat_params->bl32_params; 150 } 151 } 152 153 /******************************************************************************* 154 * Initialize the gic, configure the SCR. 155 ******************************************************************************/ 156 void bl31_platform_setup(void) 157 { 158 uint32_t tmp_reg; 159 160 /* 161 * Setup secondary CPU POR infrastructure. 162 */ 163 plat_secondary_setup(); 164 165 /* 166 * Initial Memory Controller configuration. 167 */ 168 tegra_memctrl_setup(); 169 170 /* 171 * Do initial security configuration to allow DRAM/device access. 172 */ 173 tegra_memctrl_tzdram_setup(tegra_bl31_phys_base, 174 plat_bl31_params_from_bl2.tzdram_size); 175 176 /* Set the next EL to be AArch64 */ 177 tmp_reg = SCR_RES1_BITS | SCR_RW_BIT; 178 write_scr(tmp_reg); 179 180 /* Initialize the gic cpu and distributor interfaces */ 181 tegra_gic_setup(); 182 } 183 184 /******************************************************************************* 185 * Perform the very early platform specific architectural setup here. At the 186 * moment this only intializes the mmu in a quick and dirty way. 187 ******************************************************************************/ 188 void bl31_plat_arch_setup(void) 189 { 190 unsigned long bl31_base_pa = tegra_bl31_phys_base; 191 unsigned long total_base = bl31_base_pa; 192 unsigned long total_size = TZDRAM_END - BL31_RO_BASE; 193 unsigned long ro_start = bl31_base_pa; 194 unsigned long ro_size = BL31_RO_LIMIT - BL31_RO_BASE; 195 unsigned long coh_start = 0; 196 unsigned long coh_size = 0; 197 const mmap_region_t *plat_mmio_map = NULL; 198 199 #if USE_COHERENT_MEM 200 coh_start = total_base + (BL31_COHERENT_RAM_BASE - BL31_RO_BASE); 201 coh_size = BL31_COHERENT_RAM_LIMIT - BL31_COHERENT_RAM_BASE; 202 #endif 203 204 /* add memory regions */ 205 mmap_add_region(total_base, total_base, 206 total_size, 207 MT_MEMORY | MT_RW | MT_SECURE); 208 mmap_add_region(ro_start, ro_start, 209 ro_size, 210 MT_MEMORY | MT_RO | MT_SECURE); 211 #if USE_COHERENT_MEM 212 mmap_add_region(coh_start, coh_start, 213 coh_size, 214 MT_DEVICE | MT_RW | MT_SECURE); 215 #endif 216 217 /* add MMIO space */ 218 plat_mmio_map = plat_get_mmio_map(); 219 if (plat_mmio_map) 220 mmap_add(plat_mmio_map); 221 else 222 WARN("MMIO map not available\n"); 223 224 /* set up translation tables */ 225 init_xlat_tables(); 226 227 /* enable the MMU */ 228 enable_mmu_el3(0); 229 } 230 231 /******************************************************************************* 232 * Check if the given NS DRAM range is valid 233 ******************************************************************************/ 234 int bl31_check_ns_address(uint64_t base, uint64_t size_in_bytes) 235 { 236 uint64_t end = base + size_in_bytes - 1; 237 238 /* 239 * Check if the NS DRAM address is valid 240 */ 241 if ((base < TEGRA_DRAM_BASE) || (end > TEGRA_DRAM_END) || 242 (base >= end)) { 243 ERROR("NS address is out-of-bounds!\n"); 244 return -EFAULT; 245 } 246 247 /* 248 * TZDRAM aperture contains the BL31 and BL32 images, so we need 249 * to check if the NS DRAM range overlaps the TZDRAM aperture. 250 */ 251 if ((base < TZDRAM_END) && (end > tegra_bl31_phys_base)) { 252 ERROR("NS address overlaps TZDRAM!\n"); 253 return -ENOTSUP; 254 } 255 256 /* valid NS address */ 257 return 0; 258 } 259