Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 1 | /* |
Antonio Nino Diaz | 0b32628 | 2017-02-16 16:17:19 +0000 | [diff] [blame] | 2 | * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 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 | |
Dan Handley | 97043ac | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 31 | #include <arch.h> |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 32 | #include <arch_helpers.h> |
Dan Handley | 97043ac | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 33 | #include <assert.h> |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 34 | #include <bl_common.h> |
| 35 | #include <bl31.h> |
Antonio Nino Diaz | 0b32628 | 2017-02-16 16:17:19 +0000 | [diff] [blame] | 36 | #include <console.h> |
Achin Gupta | 7aea908 | 2014-02-01 07:51:28 +0000 | [diff] [blame] | 37 | #include <context_mgmt.h> |
Soby Mathew | b79af93 | 2014-06-12 17:23:58 +0100 | [diff] [blame] | 38 | #include <debug.h> |
Dan Handley | dec5e0d | 2014-05-15 14:11:36 +0100 | [diff] [blame] | 39 | #include <platform.h> |
dp-arm | 872be88 | 2016-09-19 11:18:44 +0100 | [diff] [blame] | 40 | #include <pmf.h> |
| 41 | #include <runtime_instr.h> |
Dan Handley | 97043ac | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 42 | #include <runtime_svc.h> |
Vikram Kanigiri | f05cb4a | 2014-05-28 13:41:51 +0100 | [diff] [blame] | 43 | #include <string.h> |
Achin Gupta | 7aea908 | 2014-02-01 07:51:28 +0000 | [diff] [blame] | 44 | |
dp-arm | 872be88 | 2016-09-19 11:18:44 +0100 | [diff] [blame] | 45 | #if ENABLE_RUNTIME_INSTRUMENTATION |
| 46 | PMF_REGISTER_SERVICE_SMC(rt_instr_svc, PMF_RT_INSTR_SVC_ID, |
| 47 | RT_INSTR_TOTAL_IDS, PMF_STORE_ENABLE) |
| 48 | #endif |
| 49 | |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 50 | /******************************************************************************* |
| 51 | * This function pointer is used to initialise the BL32 image. It's initialized |
| 52 | * by SPD calling bl31_register_bl32_init after setting up all things necessary |
| 53 | * for SP execution. In cases where both SPD and SP are absent, or when SPD |
| 54 | * finds it impossible to execute SP, this pointer is left as NULL |
| 55 | ******************************************************************************/ |
Vikram Kanigiri | 6871c5d | 2014-05-16 18:48:12 +0100 | [diff] [blame] | 56 | static int32_t (*bl32_init)(void); |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 57 | |
Achin Gupta | 7aea908 | 2014-02-01 07:51:28 +0000 | [diff] [blame] | 58 | /******************************************************************************* |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 59 | * Variable to indicate whether next image to execute after BL31 is BL33 |
| 60 | * (non-secure & default) or BL32 (secure). |
| 61 | ******************************************************************************/ |
Vikram Kanigiri | faaa2e7 | 2014-07-15 16:49:22 +0100 | [diff] [blame] | 62 | static uint32_t next_image_type = NON_SECURE; |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 63 | |
Soby Mathew | 58e946a | 2016-09-19 17:21:15 +0100 | [diff] [blame] | 64 | /* |
| 65 | * Implement the ARM Standard Service function to get arguments for a |
| 66 | * particular service. |
| 67 | */ |
| 68 | uintptr_t get_arm_std_svc_args(unsigned int svc_mask) |
| 69 | { |
| 70 | /* Setup the arguments for PSCI Library */ |
| 71 | DEFINE_STATIC_PSCI_LIB_ARGS_V1(psci_args, bl31_warm_entrypoint); |
| 72 | |
| 73 | /* PSCI is the only ARM Standard Service implemented */ |
| 74 | assert(svc_mask == PSCI_FID_MASK); |
| 75 | |
| 76 | return (uintptr_t)&psci_args; |
| 77 | } |
| 78 | |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 79 | /******************************************************************************* |
Achin Gupta | 7aea908 | 2014-02-01 07:51:28 +0000 | [diff] [blame] | 80 | * Simple function to initialise all BL31 helper libraries. |
| 81 | ******************************************************************************/ |
Juan Castillo | 4f2104f | 2014-06-13 17:05:10 +0100 | [diff] [blame] | 82 | void bl31_lib_init(void) |
Achin Gupta | 7aea908 | 2014-02-01 07:51:28 +0000 | [diff] [blame] | 83 | { |
| 84 | cm_init(); |
| 85 | } |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 86 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 87 | /******************************************************************************* |
| 88 | * BL31 is responsible for setting up the runtime services for the primary cpu |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 89 | * before passing control to the bootloader or an Operating System. This |
| 90 | * function calls runtime_svc_init() which initializes all registered runtime |
| 91 | * services. The run time services would setup enough context for the core to |
| 92 | * swtich to the next exception level. When this function returns, the core will |
| 93 | * switch to the programmed exception level via. an ERET. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 94 | ******************************************************************************/ |
| 95 | void bl31_main(void) |
| 96 | { |
Juan Castillo | d178637 | 2015-12-14 09:35:25 +0000 | [diff] [blame] | 97 | NOTICE("BL31: %s\n", version_string); |
| 98 | NOTICE("BL31: %s\n", build_message); |
Dan Handley | 6ad2e46 | 2014-07-29 17:14:00 +0100 | [diff] [blame] | 99 | |
Soby Mathew | 78e6161 | 2015-12-09 11:28:43 +0000 | [diff] [blame] | 100 | /* Perform platform setup in BL31 */ |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 101 | bl31_platform_setup(); |
| 102 | |
Achin Gupta | 7aea908 | 2014-02-01 07:51:28 +0000 | [diff] [blame] | 103 | /* Initialise helper libraries */ |
| 104 | bl31_lib_init(); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 105 | |
Soby Mathew | 58e946a | 2016-09-19 17:21:15 +0100 | [diff] [blame] | 106 | /* Initialize the runtime services e.g. psci. */ |
Juan Castillo | d178637 | 2015-12-14 09:35:25 +0000 | [diff] [blame] | 107 | INFO("BL31: Initializing runtime services\n"); |
Achin Gupta | 7421b46 | 2014-02-01 18:53:26 +0000 | [diff] [blame] | 108 | runtime_svc_init(); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 109 | |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 110 | /* |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 111 | * All the cold boot actions on the primary cpu are done. We now need to |
| 112 | * decide which is the next image (BL32 or BL33) and how to execute it. |
| 113 | * If the SPD runtime service is present, it would want to pass control |
| 114 | * to BL32 first in S-EL1. In that case, SPD would have registered a |
| 115 | * function to intialize bl32 where it takes responsibility of entering |
| 116 | * S-EL1 and returning control back to bl31_main. Once this is done we |
| 117 | * can prepare entry into BL33 as normal. |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 118 | */ |
| 119 | |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 120 | /* |
Vikram Kanigiri | 6871c5d | 2014-05-16 18:48:12 +0100 | [diff] [blame] | 121 | * If SPD had registerd an init hook, invoke it. |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 122 | */ |
Dan Handley | 6ad2e46 | 2014-07-29 17:14:00 +0100 | [diff] [blame] | 123 | if (bl32_init) { |
Juan Castillo | d178637 | 2015-12-14 09:35:25 +0000 | [diff] [blame] | 124 | INFO("BL31: Initializing BL32\n"); |
Vikram Kanigiri | 6871c5d | 2014-05-16 18:48:12 +0100 | [diff] [blame] | 125 | (*bl32_init)(); |
Dan Handley | 6ad2e46 | 2014-07-29 17:14:00 +0100 | [diff] [blame] | 126 | } |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 127 | /* |
| 128 | * We are ready to enter the next EL. Prepare entry into the image |
| 129 | * corresponding to the desired security state after the next ERET. |
| 130 | */ |
| 131 | bl31_prepare_next_image_entry(); |
Soby Mathew | 78e6161 | 2015-12-09 11:28:43 +0000 | [diff] [blame] | 132 | |
Antonio Nino Diaz | 0b32628 | 2017-02-16 16:17:19 +0000 | [diff] [blame] | 133 | console_flush(); |
| 134 | |
Soby Mathew | 78e6161 | 2015-12-09 11:28:43 +0000 | [diff] [blame] | 135 | /* |
| 136 | * Perform any platform specific runtime setup prior to cold boot exit |
| 137 | * from BL31 |
| 138 | */ |
| 139 | bl31_plat_runtime_setup(); |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | /******************************************************************************* |
| 143 | * Accessor functions to help runtime services decide which image should be |
| 144 | * executed after BL31. This is BL33 or the non-secure bootloader image by |
| 145 | * default but the Secure payload dispatcher could override this by requesting |
| 146 | * an entry into BL32 (Secure payload) first. If it does so then it should use |
| 147 | * the same API to program an entry into BL33 once BL32 initialisation is |
| 148 | * complete. |
| 149 | ******************************************************************************/ |
| 150 | void bl31_set_next_image_type(uint32_t security_state) |
| 151 | { |
Juan Castillo | d3280be | 2014-06-05 09:45:36 +0100 | [diff] [blame] | 152 | assert(sec_state_is_valid(security_state)); |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 153 | next_image_type = security_state; |
| 154 | } |
| 155 | |
| 156 | uint32_t bl31_get_next_image_type(void) |
| 157 | { |
| 158 | return next_image_type; |
| 159 | } |
| 160 | |
| 161 | /******************************************************************************* |
| 162 | * This function programs EL3 registers and performs other setup to enable entry |
| 163 | * into the next image after BL31 at the next ERET. |
| 164 | ******************************************************************************/ |
Juan Castillo | 4f2104f | 2014-06-13 17:05:10 +0100 | [diff] [blame] | 165 | void bl31_prepare_next_image_entry(void) |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 166 | { |
Vikram Kanigiri | 4112bfa | 2014-04-15 18:08:08 +0100 | [diff] [blame] | 167 | entry_point_info_t *next_image_info; |
Andrew Thoelke | 167a935 | 2014-06-04 21:10:52 +0100 | [diff] [blame] | 168 | uint32_t image_type; |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 169 | |
Soby Mathew | 8cd16e6 | 2016-05-17 14:01:32 +0100 | [diff] [blame] | 170 | #if CTX_INCLUDE_AARCH32_REGS |
| 171 | /* |
| 172 | * Ensure that the build flag to save AArch32 system registers in CPU |
| 173 | * context is not set for AArch64-only platforms. |
| 174 | */ |
| 175 | if (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL1_SHIFT) |
| 176 | & ID_AA64PFR0_ELX_MASK) == 0x1) { |
| 177 | ERROR("EL1 supports AArch64-only. Please set build flag " |
| 178 | "CTX_INCLUDE_AARCH32_REGS = 0"); |
| 179 | panic(); |
| 180 | } |
| 181 | #endif |
| 182 | |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 183 | /* Determine which image to execute next */ |
| 184 | image_type = bl31_get_next_image_type(); |
| 185 | |
Jeenu Viswambharan | caa8493 | 2014-02-06 10:36:15 +0000 | [diff] [blame] | 186 | /* Program EL3 registers to enable entry into the next EL */ |
Dan Handley | 9865ac1 | 2014-05-27 16:17:21 +0100 | [diff] [blame] | 187 | next_image_info = bl31_plat_get_next_image_ep_info(image_type); |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 188 | assert(next_image_info); |
Vikram Kanigiri | f05cb4a | 2014-05-28 13:41:51 +0100 | [diff] [blame] | 189 | assert(image_type == GET_SECURITY_STATE(next_image_info->h.attr)); |
Achin Gupta | 35ca351 | 2014-02-19 17:58:33 +0000 | [diff] [blame] | 190 | |
Juan Castillo | d178637 | 2015-12-14 09:35:25 +0000 | [diff] [blame] | 191 | INFO("BL31: Preparing for EL3 exit to %s world\n", |
Dan Handley | 6ad2e46 | 2014-07-29 17:14:00 +0100 | [diff] [blame] | 192 | (image_type == SECURE) ? "secure" : "normal"); |
Sandrine Bailleux | 68a68c9 | 2015-09-28 17:03:06 +0100 | [diff] [blame] | 193 | print_entry_point_info(next_image_info); |
Soby Mathew | 85a181c | 2015-07-13 11:21:11 +0100 | [diff] [blame] | 194 | cm_init_my_context(next_image_info); |
Andrew Thoelke | 167a935 | 2014-06-04 21:10:52 +0100 | [diff] [blame] | 195 | cm_prepare_el3_exit(image_type); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 196 | } |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 197 | |
| 198 | /******************************************************************************* |
| 199 | * This function initializes the pointer to BL32 init function. This is expected |
| 200 | * to be called by the SPD after it finishes all its initialization |
| 201 | ******************************************************************************/ |
Vikram Kanigiri | 6871c5d | 2014-05-16 18:48:12 +0100 | [diff] [blame] | 202 | void bl31_register_bl32_init(int32_t (*func)(void)) |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 203 | { |
| 204 | bl32_init = func; |
| 205 | } |