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 <arm_def.h> 34 #include <arm_gic.h> 35 #include <assert.h> 36 #include <bl_common.h> 37 #include <cci.h> 38 #include <console.h> 39 #include <debug.h> 40 #include <mmio.h> 41 #include <plat_arm.h> 42 #include <platform.h> 43 44 45 /* 46 * The next 3 constants identify the extents of the code, RO data region and the 47 * limit of the BL3-1 image. These addresses are used by the MMU setup code and 48 * therefore they must be page-aligned. It is the responsibility of the linker 49 * script to ensure that __RO_START__, __RO_END__ & __BL31_END__ linker symbols 50 * refer to page-aligned addresses. 51 */ 52 #define BL31_RO_BASE (unsigned long)(&__RO_START__) 53 #define BL31_RO_LIMIT (unsigned long)(&__RO_END__) 54 #define BL31_END (unsigned long)(&__BL31_END__) 55 56 #if USE_COHERENT_MEM 57 /* 58 * The next 2 constants identify the extents of the coherent memory region. 59 * These addresses are used by the MMU setup code and therefore they must be 60 * page-aligned. It is the responsibility of the linker script to ensure that 61 * __COHERENT_RAM_START__ and __COHERENT_RAM_END__ linker symbols 62 * refer to page-aligned addresses. 63 */ 64 #define BL31_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__) 65 #define BL31_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__) 66 #endif 67 68 /* 69 * Placeholder variables for copying the arguments that have been passed to 70 * BL3-1 from BL2. 71 */ 72 static entry_point_info_t bl32_image_ep_info; 73 static entry_point_info_t bl33_image_ep_info; 74 75 76 /* Weak definitions may be overridden in specific ARM standard platform */ 77 #pragma weak bl31_early_platform_setup 78 #pragma weak bl31_platform_setup 79 #pragma weak bl31_plat_arch_setup 80 #pragma weak bl31_plat_get_next_image_ep_info 81 #pragma weak plat_get_syscnt_freq 82 83 84 /******************************************************************************* 85 * Return a pointer to the 'entry_point_info' structure of the next image for the 86 * security state specified. BL3-3 corresponds to the non-secure image type 87 * while BL3-2 corresponds to the secure image type. A NULL pointer is returned 88 * if the image does not exist. 89 ******************************************************************************/ 90 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 91 { 92 entry_point_info_t *next_image_info; 93 94 assert(sec_state_is_valid(type)); 95 next_image_info = (type == NON_SECURE) 96 ? &bl33_image_ep_info : &bl32_image_ep_info; 97 /* 98 * None of the images on the ARM development platforms can have 0x0 99 * as the entrypoint 100 */ 101 if (next_image_info->pc) 102 return next_image_info; 103 else 104 return NULL; 105 } 106 107 /******************************************************************************* 108 * Perform any BL3-1 early platform setup common to ARM standard platforms. 109 * Here is an opportunity to copy parameters passed by the calling EL (S-EL1 110 * in BL2 & S-EL3 in BL1) before they are lost (potentially). This needs to be 111 * done before the MMU is initialized so that the memory layout can be used 112 * while creating page tables. BL2 has flushed this information to memory, so 113 * we are guaranteed to pick up good data. 114 ******************************************************************************/ 115 void arm_bl31_early_platform_setup(bl31_params_t *from_bl2, 116 void *plat_params_from_bl2) 117 { 118 /* Initialize the console to provide early debug support */ 119 console_init(PLAT_ARM_BOOT_UART_BASE, PLAT_ARM_BOOT_UART_CLK_IN_HZ, 120 ARM_CONSOLE_BAUDRATE); 121 122 #if RESET_TO_BL31 123 /* There are no parameters from BL2 if BL3-1 is a reset vector */ 124 assert(from_bl2 == NULL); 125 assert(plat_params_from_bl2 == NULL); 126 127 #ifdef BL32_BASE 128 /* Populate entry point information for BL3-2 */ 129 SET_PARAM_HEAD(&bl32_image_ep_info, 130 PARAM_EP, 131 VERSION_1, 132 0); 133 SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE); 134 bl32_image_ep_info.pc = BL32_BASE; 135 bl32_image_ep_info.spsr = arm_get_spsr_for_bl32_entry(); 136 #endif /* BL32_BASE */ 137 138 /* Populate entry point information for BL3-3 */ 139 SET_PARAM_HEAD(&bl33_image_ep_info, 140 PARAM_EP, 141 VERSION_1, 142 0); 143 /* 144 * Tell BL3-1 where the non-trusted software image 145 * is located and the entry state information 146 */ 147 bl33_image_ep_info.pc = plat_get_ns_image_entrypoint(); 148 bl33_image_ep_info.spsr = arm_get_spsr_for_bl33_entry(); 149 SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE); 150 151 #else 152 /* 153 * Check params passed from BL2 should not be NULL, 154 */ 155 assert(from_bl2 != NULL); 156 assert(from_bl2->h.type == PARAM_BL31); 157 assert(from_bl2->h.version >= VERSION_1); 158 /* 159 * In debug builds, we pass a special value in 'plat_params_from_bl2' 160 * to verify platform parameters from BL2 to BL3-1. 161 * In release builds, it's not used. 162 */ 163 assert(((unsigned long long)plat_params_from_bl2) == 164 ARM_BL31_PLAT_PARAM_VAL); 165 166 /* 167 * Copy BL3-2 (if populated by BL2) and BL3-3 entry point information. 168 * They are stored in Secure RAM, in BL2's address space. 169 */ 170 if (from_bl2->bl32_ep_info) 171 bl32_image_ep_info = *from_bl2->bl32_ep_info; 172 bl33_image_ep_info = *from_bl2->bl33_ep_info; 173 #endif 174 } 175 176 void bl31_early_platform_setup(bl31_params_t *from_bl2, 177 void *plat_params_from_bl2) 178 { 179 arm_bl31_early_platform_setup(from_bl2, plat_params_from_bl2); 180 181 /* 182 * Initialize CCI for this cluster during cold boot. 183 * No need for locks as no other CPU is active. 184 */ 185 arm_cci_init(); 186 187 /* 188 * Enable CCI coherency for the primary CPU's cluster. 189 * Earlier bootloader stages might already do this (e.g. Trusted 190 * Firmware's BL1 does it) but we can't assume so. There is no harm in 191 * executing this code twice anyway. 192 * Platform specific PSCI code will enable coherency for other 193 * clusters. 194 */ 195 cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr())); 196 } 197 198 /******************************************************************************* 199 * Perform any BL3-1 platform setup common to ARM standard platforms 200 ******************************************************************************/ 201 void arm_bl31_platform_setup(void) 202 { 203 /* Initialize the gic cpu and distributor interfaces */ 204 plat_arm_gic_init(); 205 arm_gic_setup(); 206 207 #if RESET_TO_BL31 208 /* 209 * Do initial security configuration to allow DRAM/device access 210 * (if earlier BL has not already done so). 211 */ 212 plat_arm_security_setup(); 213 214 #endif /* RESET_TO_BL31 */ 215 216 /* Enable and initialize the System level generic timer */ 217 mmio_write_32(ARM_SYS_CNTCTL_BASE + CNTCR_OFF, 218 CNTCR_FCREQ(0) | CNTCR_EN); 219 220 /* Allow access to the System counter timer module */ 221 arm_configure_sys_timer(); 222 223 /* Initialize power controller before setting up topology */ 224 plat_arm_pwrc_setup(); 225 } 226 227 void bl31_platform_setup(void) 228 { 229 arm_bl31_platform_setup(); 230 } 231 232 /******************************************************************************* 233 * Perform the very early platform specific architectural setup here. At the 234 * moment this is only intializes the mmu in a quick and dirty way. 235 ******************************************************************************/ 236 void arm_bl31_plat_arch_setup(void) 237 { 238 arm_configure_mmu_el3(BL31_RO_BASE, 239 (BL31_END - BL31_RO_BASE), 240 BL31_RO_BASE, 241 BL31_RO_LIMIT 242 #if USE_COHERENT_MEM 243 , BL31_COHERENT_RAM_BASE, 244 BL31_COHERENT_RAM_LIMIT 245 #endif 246 ); 247 } 248 249 void bl31_plat_arch_setup(void) 250 { 251 arm_bl31_plat_arch_setup(); 252 } 253 254 uint64_t plat_get_syscnt_freq(void) 255 { 256 uint64_t counter_base_frequency; 257 258 /* Read the frequency from Frequency modes table */ 259 counter_base_frequency = mmio_read_32(ARM_SYS_CNTCTL_BASE + CNTFID_OFF); 260 261 /* The first entry of the frequency modes table must not be 0 */ 262 if (counter_base_frequency == 0) 263 panic(); 264 265 return counter_base_frequency; 266 } 267