Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 1 | /* |
Dan Handley | e83b0ca | 2014-01-14 18:17:09 +0000 | [diff] [blame] | 2 | * Copyright (c) 2013-2014, 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 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 31 | #include <assert.h> |
Dan Handley | 2bd4ef2 | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 32 | #include <bl_common.h> |
| 33 | #include <arch.h> |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 34 | #include <arch_helpers.h> |
Dan Handley | 2bd4ef2 | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 35 | #include <context.h> |
Achin Gupta | ef7a28c | 2014-02-01 08:59:56 +0000 | [diff] [blame] | 36 | #include <context_mgmt.h> |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 37 | #include <cpu_data.h> |
Soby Mathew | 2ed46e9 | 2014-07-04 16:02:26 +0100 | [diff] [blame] | 38 | #include <platform.h> |
Dan Handley | bcd60ba | 2014-04-17 18:53:42 +0100 | [diff] [blame] | 39 | #include <runtime_svc.h> |
Dan Handley | 2bd4ef2 | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 40 | #include <stddef.h> |
Dan Handley | 714a0d2 | 2014-04-09 13:13:04 +0100 | [diff] [blame] | 41 | #include "psci_private.h" |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 42 | |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 43 | typedef int (*afflvl_suspend_handler_t)(aff_map_node_t *node, |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 44 | unsigned int power_state); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 45 | |
| 46 | /******************************************************************************* |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 47 | * This function saves the power state parameter passed in the current PSCI |
| 48 | * cpu_suspend call in the per-cpu data array. |
Achin Gupta | a45e397 | 2013-12-05 15:10:48 +0000 | [diff] [blame] | 49 | ******************************************************************************/ |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 50 | void psci_set_suspend_power_state(unsigned int power_state) |
Achin Gupta | a45e397 | 2013-12-05 15:10:48 +0000 | [diff] [blame] | 51 | { |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 52 | set_cpu_data(psci_svc_cpu_data.power_state, power_state); |
| 53 | flush_cpu_data(psci_svc_cpu_data.power_state); |
Achin Gupta | a45e397 | 2013-12-05 15:10:48 +0000 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | /******************************************************************************* |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 57 | * This function gets the affinity level till which the current cpu could be |
| 58 | * powered down during a cpu_suspend call. Returns PSCI_INVALID_DATA if the |
| 59 | * power state is invalid. |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 60 | ******************************************************************************/ |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 61 | int psci_get_suspend_afflvl() |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 62 | { |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 63 | unsigned int power_state; |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 64 | |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 65 | power_state = get_cpu_data(psci_svc_cpu_data.power_state); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 66 | |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 67 | return ((power_state == PSCI_INVALID_DATA) ? |
| 68 | power_state : psci_get_pstate_afflvl(power_state)); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 69 | } |
| 70 | |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 71 | /******************************************************************************* |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 72 | * This function gets the state id of the current cpu from the power state |
| 73 | * parameter saved in the per-cpu data array. Returns PSCI_INVALID_DATA if the |
| 74 | * power state saved is invalid. |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 75 | ******************************************************************************/ |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 76 | int psci_get_suspend_stateid() |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 77 | { |
| 78 | unsigned int power_state; |
| 79 | |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 80 | power_state = get_cpu_data(psci_svc_cpu_data.power_state); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 81 | |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 82 | return ((power_state == PSCI_INVALID_DATA) ? |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 83 | power_state : psci_get_pstate_id(power_state)); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | /******************************************************************************* |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 87 | * This function gets the state id of the cpu specified by the 'mpidr' parameter |
| 88 | * from the power state parameter saved in the per-cpu data array. Returns |
| 89 | * PSCI_INVALID_DATA if the power state saved is invalid. |
Achin Gupta | a45e397 | 2013-12-05 15:10:48 +0000 | [diff] [blame] | 90 | ******************************************************************************/ |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 91 | int psci_get_suspend_stateid_by_mpidr(unsigned long mpidr) |
Achin Gupta | a45e397 | 2013-12-05 15:10:48 +0000 | [diff] [blame] | 92 | { |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 93 | unsigned int power_state; |
| 94 | |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 95 | power_state = get_cpu_data_by_mpidr(mpidr, |
| 96 | psci_svc_cpu_data.power_state); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 97 | |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 98 | return ((power_state == PSCI_INVALID_DATA) ? |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 99 | power_state : psci_get_pstate_id(power_state)); |
Achin Gupta | a45e397 | 2013-12-05 15:10:48 +0000 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | /******************************************************************************* |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 103 | * The next three functions implement a handler for each supported affinity |
| 104 | * level which is called when that affinity level is about to be suspended. |
| 105 | ******************************************************************************/ |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 106 | static int psci_afflvl0_suspend(aff_map_node_t *cpu_node, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 107 | unsigned int power_state) |
| 108 | { |
Achin Gupta | e1aa516 | 2014-06-26 09:58:52 +0100 | [diff] [blame] | 109 | unsigned long psci_entrypoint; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 110 | |
| 111 | /* Sanity check to safeguard against data corruption */ |
| 112 | assert(cpu_node->level == MPIDR_AFFLVL0); |
| 113 | |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 114 | /* Save PSCI power state parameter for the core in suspend context */ |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 115 | psci_set_suspend_power_state(power_state); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 116 | |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 117 | /* |
Soby Mathew | 8595b87 | 2015-01-06 15:36:38 +0000 | [diff] [blame^] | 118 | * Generic management: Allow the Secure world to suspend itself |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 119 | */ |
| 120 | |
| 121 | /* |
| 122 | * Call the cpu suspend handler registered by the Secure Payload |
| 123 | * Dispatcher to let it do any bookeeping. If the handler encounters an |
| 124 | * error, it's expected to assert within |
| 125 | */ |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 126 | if (psci_spd_pm && psci_spd_pm->svc_suspend) |
| 127 | psci_spd_pm->svc_suspend(power_state); |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 128 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 129 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 130 | /* Set the secure world (EL3) re-entry point after BL1 */ |
| 131 | psci_entrypoint = (unsigned long) psci_aff_suspend_finish_entry; |
| 132 | |
| 133 | /* |
| 134 | * Arch. management. Perform the necessary steps to flush all |
| 135 | * cpu caches. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 136 | */ |
Achin Gupta | e1aa516 | 2014-06-26 09:58:52 +0100 | [diff] [blame] | 137 | psci_do_pwrdown_cache_maintenance(MPIDR_AFFLVL0); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 138 | |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 139 | if (!psci_plat_pm_ops->affinst_suspend) |
| 140 | return PSCI_E_SUCCESS; |
| 141 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 142 | /* |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 143 | * Plat. management: Allow the platform to perform the |
| 144 | * necessary actions to turn off this cpu e.g. set the |
| 145 | * platform defined mailbox with the psci entrypoint, |
| 146 | * program the power controller etc. |
| 147 | */ |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 148 | return psci_plat_pm_ops->affinst_suspend(psci_entrypoint, |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 149 | cpu_node->level, |
| 150 | psci_get_phys_state(cpu_node)); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 151 | } |
| 152 | |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 153 | static int psci_afflvl1_suspend(aff_map_node_t *cluster_node, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 154 | unsigned int power_state) |
| 155 | { |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 156 | unsigned int plat_state; |
| 157 | unsigned long psci_entrypoint; |
| 158 | |
| 159 | /* Sanity check the cluster level */ |
| 160 | assert(cluster_node->level == MPIDR_AFFLVL1); |
| 161 | |
| 162 | /* |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 163 | * Arch. management: Flush all levels of caches to PoC if the |
Achin Gupta | f6b9e99 | 2014-07-31 11:19:11 +0100 | [diff] [blame] | 164 | * cluster is to be shutdown. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 165 | */ |
Achin Gupta | f6b9e99 | 2014-07-31 11:19:11 +0100 | [diff] [blame] | 166 | psci_do_pwrdown_cache_maintenance(MPIDR_AFFLVL1); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 167 | |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 168 | if (!psci_plat_pm_ops->affinst_suspend) |
| 169 | return PSCI_E_SUCCESS; |
| 170 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 171 | /* |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 172 | * Plat. Management. Allow the platform to do its cluster specific |
| 173 | * bookeeping e.g. turn off interconnect coherency, program the power |
| 174 | * controller etc. Sending the psci entrypoint is currently redundant |
| 175 | * beyond affinity level 0 but one never knows what a platform might |
| 176 | * do. Also it allows us to keep the platform handler prototype the |
| 177 | * same. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 178 | */ |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 179 | plat_state = psci_get_phys_state(cluster_node); |
| 180 | psci_entrypoint = (unsigned long) psci_aff_suspend_finish_entry; |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 181 | return psci_plat_pm_ops->affinst_suspend(psci_entrypoint, |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 182 | cluster_node->level, |
| 183 | plat_state); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 187 | static int psci_afflvl2_suspend(aff_map_node_t *system_node, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 188 | unsigned int power_state) |
| 189 | { |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 190 | unsigned int plat_state; |
| 191 | unsigned long psci_entrypoint; |
| 192 | |
| 193 | /* Cannot go beyond this */ |
| 194 | assert(system_node->level == MPIDR_AFFLVL2); |
| 195 | |
| 196 | /* |
| 197 | * Keep the physical state of the system handy to decide what |
| 198 | * action needs to be taken |
| 199 | */ |
Achin Gupta | 75f7367 | 2013-12-05 16:33:10 +0000 | [diff] [blame] | 200 | plat_state = psci_get_phys_state(system_node); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 201 | |
| 202 | /* |
Achin Gupta | f6b9e99 | 2014-07-31 11:19:11 +0100 | [diff] [blame] | 203 | * Arch. management: Flush all levels of caches to PoC if the |
| 204 | * system is to be shutdown. |
| 205 | */ |
| 206 | psci_do_pwrdown_cache_maintenance(MPIDR_AFFLVL2); |
| 207 | |
| 208 | /* |
Achin Gupta | 3140a9e | 2013-12-02 16:23:12 +0000 | [diff] [blame] | 209 | * Plat. Management : Allow the platform to do its bookeeping |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 210 | * at this affinity level |
| 211 | */ |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 212 | if (!psci_plat_pm_ops->affinst_suspend) |
| 213 | return PSCI_E_SUCCESS; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 214 | |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 215 | /* |
| 216 | * Sending the psci entrypoint is currently redundant |
| 217 | * beyond affinity level 0 but one never knows what a |
| 218 | * platform might do. Also it allows us to keep the |
| 219 | * platform handler prototype the same. |
| 220 | */ |
| 221 | plat_state = psci_get_phys_state(system_node); |
| 222 | psci_entrypoint = (unsigned long) psci_aff_suspend_finish_entry; |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 223 | return psci_plat_pm_ops->affinst_suspend(psci_entrypoint, |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 224 | system_node->level, |
| 225 | plat_state); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 226 | } |
| 227 | |
Dan Handley | e2712bc | 2014-04-10 15:37:22 +0100 | [diff] [blame] | 228 | static const afflvl_suspend_handler_t psci_afflvl_suspend_handlers[] = { |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 229 | psci_afflvl0_suspend, |
| 230 | psci_afflvl1_suspend, |
| 231 | psci_afflvl2_suspend, |
| 232 | }; |
| 233 | |
| 234 | /******************************************************************************* |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 235 | * This function takes an array of pointers to affinity instance nodes in the |
| 236 | * topology tree and calls the suspend handler for the corresponding affinity |
| 237 | * levels |
| 238 | ******************************************************************************/ |
Achin Gupta | 56bcdc2 | 2014-07-28 00:15:23 +0100 | [diff] [blame] | 239 | static int psci_call_suspend_handlers(aff_map_node_t *mpidr_nodes[], |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 240 | int start_afflvl, |
| 241 | int end_afflvl, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 242 | unsigned int power_state) |
| 243 | { |
| 244 | int rc = PSCI_E_INVALID_PARAMS, level; |
Dan Handley | e2712bc | 2014-04-10 15:37:22 +0100 | [diff] [blame] | 245 | aff_map_node_t *node; |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 246 | |
| 247 | for (level = start_afflvl; level <= end_afflvl; level++) { |
| 248 | node = mpidr_nodes[level]; |
| 249 | if (node == NULL) |
| 250 | continue; |
| 251 | |
| 252 | /* |
| 253 | * TODO: In case of an error should there be a way |
| 254 | * of restoring what we might have torn down at |
| 255 | * lower affinity levels. |
| 256 | */ |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 257 | rc = psci_afflvl_suspend_handlers[level](node, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 258 | power_state); |
| 259 | if (rc != PSCI_E_SUCCESS) |
| 260 | break; |
| 261 | } |
| 262 | |
| 263 | return rc; |
| 264 | } |
| 265 | |
| 266 | /******************************************************************************* |
| 267 | * Top level handler which is called when a cpu wants to suspend its execution. |
| 268 | * It is assumed that along with turning the cpu off, higher affinity levels |
| 269 | * until the target affinity level will be turned off as well. It traverses |
| 270 | * through all the affinity levels performing generic, architectural, platform |
| 271 | * setup and state management e.g. for a cluster that's to be suspended, it will |
| 272 | * call the platform specific code which will disable coherency at the |
| 273 | * interconnect level if the cpu is the last in the cluster. For a cpu it could |
| 274 | * mean programming the power controller etc. |
| 275 | * |
| 276 | * The state of all the relevant affinity levels is changed prior to calling the |
| 277 | * affinity level specific handlers as their actions would depend upon the state |
| 278 | * the affinity level is about to enter. |
| 279 | * |
| 280 | * The affinity level specific handlers are called in ascending order i.e. from |
| 281 | * the lowest to the highest affinity level implemented by the platform because |
| 282 | * to turn off affinity level X it is neccesary to turn off affinity level X - 1 |
| 283 | * first. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 284 | ******************************************************************************/ |
Soby Mathew | 8595b87 | 2015-01-06 15:36:38 +0000 | [diff] [blame^] | 285 | int psci_afflvl_suspend(entry_point_info_t *ep, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 286 | unsigned int power_state, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 287 | int start_afflvl, |
| 288 | int end_afflvl) |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 289 | { |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 290 | int rc = PSCI_E_SUCCESS; |
Dan Handley | e2712bc | 2014-04-10 15:37:22 +0100 | [diff] [blame] | 291 | mpidr_aff_map_nodes_t mpidr_nodes; |
Achin Gupta | f6b9e99 | 2014-07-31 11:19:11 +0100 | [diff] [blame] | 292 | unsigned int max_phys_off_afflvl; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 293 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 294 | /* |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 295 | * Collect the pointers to the nodes in the topology tree for |
| 296 | * each affinity instance in the mpidr. If this function does |
| 297 | * not return successfully then either the mpidr or the affinity |
| 298 | * levels are incorrect. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 299 | */ |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 300 | rc = psci_get_aff_map_nodes(read_mpidr_el1() & MPIDR_AFFINITY_MASK, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 301 | start_afflvl, |
| 302 | end_afflvl, |
| 303 | mpidr_nodes); |
| 304 | if (rc != PSCI_E_SUCCESS) |
| 305 | return rc; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 306 | |
| 307 | /* |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 308 | * This function acquires the lock corresponding to each affinity |
| 309 | * level so that by the time all locks are taken, the system topology |
| 310 | * is snapshot and state management can be done safely. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 311 | */ |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 312 | psci_acquire_afflvl_locks(start_afflvl, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 313 | end_afflvl, |
| 314 | mpidr_nodes); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 315 | |
Achin Gupta | cab78e4 | 2014-07-28 00:09:01 +0100 | [diff] [blame] | 316 | /* |
| 317 | * This function updates the state of each affinity instance |
| 318 | * corresponding to the mpidr in the range of affinity levels |
| 319 | * specified. |
| 320 | */ |
| 321 | psci_do_afflvl_state_mgmt(start_afflvl, |
| 322 | end_afflvl, |
| 323 | mpidr_nodes, |
| 324 | PSCI_STATE_SUSPEND); |
Achin Gupta | f6b9e99 | 2014-07-31 11:19:11 +0100 | [diff] [blame] | 325 | |
| 326 | max_phys_off_afflvl = psci_find_max_phys_off_afflvl(start_afflvl, |
| 327 | end_afflvl, |
| 328 | mpidr_nodes); |
| 329 | assert(max_phys_off_afflvl != PSCI_INVALID_DATA); |
| 330 | |
| 331 | /* Stash the highest affinity level that will be turned off */ |
| 332 | psci_set_max_phys_off_afflvl(max_phys_off_afflvl); |
| 333 | |
Soby Mathew | 8595b87 | 2015-01-06 15:36:38 +0000 | [diff] [blame^] | 334 | /* |
| 335 | * Store the re-entry information for the non-secure world. |
| 336 | */ |
| 337 | cm_init_context(read_mpidr_el1(), ep); |
| 338 | |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 339 | /* Perform generic, architecture and platform specific handling */ |
| 340 | rc = psci_call_suspend_handlers(mpidr_nodes, |
| 341 | start_afflvl, |
| 342 | end_afflvl, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 343 | power_state); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 344 | |
| 345 | /* |
Achin Gupta | f6b9e99 | 2014-07-31 11:19:11 +0100 | [diff] [blame] | 346 | * Invalidate the entry for the highest affinity level stashed earlier. |
| 347 | * This ensures that any reads of this variable outside the power |
| 348 | * up/down sequences return PSCI_INVALID_DATA. |
| 349 | */ |
| 350 | psci_set_max_phys_off_afflvl(PSCI_INVALID_DATA); |
| 351 | |
| 352 | /* |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 353 | * Release the locks corresponding to each affinity level in the |
| 354 | * reverse order to which they were acquired. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 355 | */ |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 356 | psci_release_afflvl_locks(start_afflvl, |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 357 | end_afflvl, |
| 358 | mpidr_nodes); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 359 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 360 | return rc; |
| 361 | } |
| 362 | |
| 363 | /******************************************************************************* |
| 364 | * The following functions finish an earlier affinity suspend request. They |
| 365 | * are called by the common finisher routine in psci_common.c. |
| 366 | ******************************************************************************/ |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 367 | static unsigned int psci_afflvl0_suspend_finish(aff_map_node_t *cpu_node) |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 368 | { |
Andrew Thoelke | 4e12607 | 2014-06-04 21:10:52 +0100 | [diff] [blame] | 369 | unsigned int plat_state, state, rc; |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 370 | int32_t suspend_level; |
Soby Mathew | 2ed46e9 | 2014-07-04 16:02:26 +0100 | [diff] [blame] | 371 | uint64_t counter_freq; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 372 | |
| 373 | assert(cpu_node->level == MPIDR_AFFLVL0); |
| 374 | |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 375 | /* Ensure we have been woken up from a suspended state */ |
Achin Gupta | 75f7367 | 2013-12-05 16:33:10 +0000 | [diff] [blame] | 376 | state = psci_get_state(cpu_node); |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 377 | assert(state == PSCI_STATE_SUSPEND); |
| 378 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 379 | /* |
| 380 | * Plat. management: Perform the platform specific actions |
| 381 | * before we change the state of the cpu e.g. enabling the |
| 382 | * gic or zeroing the mailbox register. If anything goes |
| 383 | * wrong then assert as there is no way to recover from this |
| 384 | * situation. |
| 385 | */ |
| 386 | if (psci_plat_pm_ops->affinst_suspend_finish) { |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 387 | |
| 388 | /* Get the physical state of this cpu */ |
Achin Gupta | 75f7367 | 2013-12-05 16:33:10 +0000 | [diff] [blame] | 389 | plat_state = get_phys_state(state); |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 390 | rc = psci_plat_pm_ops->affinst_suspend_finish(cpu_node->level, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 391 | plat_state); |
| 392 | assert(rc == PSCI_E_SUCCESS); |
| 393 | } |
| 394 | |
| 395 | /* Get the index for restoring the re-entry information */ |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 396 | /* |
Achin Gupta | e1aa516 | 2014-06-26 09:58:52 +0100 | [diff] [blame] | 397 | * Arch. management: Enable the data cache, manage stack memory and |
| 398 | * restore the stashed EL3 architectural context from the 'cpu_context' |
| 399 | * structure for this cpu. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 400 | */ |
Achin Gupta | e1aa516 | 2014-06-26 09:58:52 +0100 | [diff] [blame] | 401 | psci_do_pwrup_cache_maintenance(); |
Soby Mathew | 2ed46e9 | 2014-07-04 16:02:26 +0100 | [diff] [blame] | 402 | |
| 403 | /* Re-init the cntfrq_el0 register */ |
| 404 | counter_freq = plat_get_syscnt_freq(); |
| 405 | write_cntfrq_el0(counter_freq); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 406 | |
| 407 | /* |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 408 | * Call the cpu suspend finish handler registered by the Secure Payload |
| 409 | * Dispatcher to let it do any bookeeping. If the handler encounters an |
| 410 | * error, it's expected to assert within |
| 411 | */ |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 412 | if (psci_spd_pm && psci_spd_pm->svc_suspend) { |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 413 | suspend_level = psci_get_suspend_afflvl(); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 414 | assert (suspend_level != PSCI_INVALID_DATA); |
Jeenu Viswambharan | 7f36660 | 2014-02-20 17:11:00 +0000 | [diff] [blame] | 415 | psci_spd_pm->svc_suspend_finish(suspend_level); |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 418 | /* Invalidate the suspend context for the node */ |
Achin Gupta | f3ccbab | 2014-07-25 14:52:47 +0100 | [diff] [blame] | 419 | psci_set_suspend_power_state(PSCI_INVALID_DATA); |
Vikram Kanigiri | f100f41 | 2014-04-01 19:26:26 +0100 | [diff] [blame] | 420 | |
Achin Gupta | 607084e | 2014-02-09 18:24:19 +0000 | [diff] [blame] | 421 | /* |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 422 | * Generic management: Now we just need to retrieve the |
| 423 | * information that we had stashed away during the suspend |
Achin Gupta | 3140a9e | 2013-12-02 16:23:12 +0000 | [diff] [blame] | 424 | * call to set this cpu on its way. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 425 | */ |
Andrew Thoelke | 4e12607 | 2014-06-04 21:10:52 +0100 | [diff] [blame] | 426 | cm_prepare_el3_exit(NON_SECURE); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 427 | |
| 428 | /* Clean caches before re-entering normal world */ |
| 429 | dcsw_op_louis(DCCSW); |
| 430 | |
Andrew Thoelke | 4e12607 | 2014-06-04 21:10:52 +0100 | [diff] [blame] | 431 | rc = PSCI_E_SUCCESS; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 432 | return rc; |
| 433 | } |
| 434 | |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 435 | static unsigned int psci_afflvl1_suspend_finish(aff_map_node_t *cluster_node) |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 436 | { |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 437 | unsigned int plat_state, rc = PSCI_E_SUCCESS; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 438 | |
| 439 | assert(cluster_node->level == MPIDR_AFFLVL1); |
| 440 | |
| 441 | /* |
| 442 | * Plat. management: Perform the platform specific actions |
| 443 | * as per the old state of the cluster e.g. enabling |
| 444 | * coherency at the interconnect depends upon the state with |
| 445 | * which this cluster was powered up. If anything goes wrong |
| 446 | * then assert as there is no way to recover from this |
| 447 | * situation. |
| 448 | */ |
| 449 | if (psci_plat_pm_ops->affinst_suspend_finish) { |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 450 | |
| 451 | /* Get the physical state of this cpu */ |
Achin Gupta | 75f7367 | 2013-12-05 16:33:10 +0000 | [diff] [blame] | 452 | plat_state = psci_get_phys_state(cluster_node); |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 453 | rc = psci_plat_pm_ops->affinst_suspend_finish(cluster_node->level, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 454 | plat_state); |
| 455 | assert(rc == PSCI_E_SUCCESS); |
| 456 | } |
| 457 | |
| 458 | return rc; |
| 459 | } |
| 460 | |
| 461 | |
Andrew Thoelke | 2bc0785 | 2014-06-09 12:44:21 +0100 | [diff] [blame] | 462 | static unsigned int psci_afflvl2_suspend_finish(aff_map_node_t *system_node) |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 463 | { |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 464 | unsigned int plat_state, rc = PSCI_E_SUCCESS;; |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 465 | |
| 466 | /* Cannot go beyond this affinity level */ |
| 467 | assert(system_node->level == MPIDR_AFFLVL2); |
| 468 | |
| 469 | /* |
| 470 | * Currently, there are no architectural actions to perform |
| 471 | * at the system level. |
| 472 | */ |
| 473 | |
| 474 | /* |
| 475 | * Plat. management: Perform the platform specific actions |
| 476 | * as per the old state of the cluster e.g. enabling |
| 477 | * coherency at the interconnect depends upon the state with |
| 478 | * which this cluster was powered up. If anything goes wrong |
| 479 | * then assert as there is no way to recover from this |
| 480 | * situation. |
| 481 | */ |
| 482 | if (psci_plat_pm_ops->affinst_suspend_finish) { |
Achin Gupta | 0959db5 | 2013-12-02 17:33:04 +0000 | [diff] [blame] | 483 | |
| 484 | /* Get the physical state of the system */ |
Achin Gupta | 75f7367 | 2013-12-05 16:33:10 +0000 | [diff] [blame] | 485 | plat_state = psci_get_phys_state(system_node); |
Soby Mathew | ffb4ab1 | 2014-09-26 15:08:52 +0100 | [diff] [blame] | 486 | rc = psci_plat_pm_ops->affinst_suspend_finish(system_node->level, |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 487 | plat_state); |
| 488 | assert(rc == PSCI_E_SUCCESS); |
| 489 | } |
| 490 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 491 | return rc; |
| 492 | } |
| 493 | |
Dan Handley | e2712bc | 2014-04-10 15:37:22 +0100 | [diff] [blame] | 494 | const afflvl_power_on_finisher_t psci_afflvl_suspend_finishers[] = { |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 495 | psci_afflvl0_suspend_finish, |
| 496 | psci_afflvl1_suspend_finish, |
| 497 | psci_afflvl2_suspend_finish, |
| 498 | }; |