/* * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include #include "opteed_private.h" /******************************************************************************* * The target cpu is being turned on. Allow the OPTEED/OPTEE to perform any * actions needed. Nothing at the moment. ******************************************************************************/ static void opteed_cpu_on_handler(uint64_t target_cpu) { } /******************************************************************************* * This cpu is being turned off. Allow the OPTEED/OPTEE to perform any actions * needed ******************************************************************************/ static int32_t opteed_cpu_off_handler(uint64_t unused) { int32_t rc = 0; uint32_t linear_id = plat_my_core_pos(); optee_context_t *optee_ctx = &opteed_sp_context[linear_id]; assert(optee_vectors); assert(get_optee_pstate(optee_ctx->state) == OPTEE_PSTATE_ON); /* Program the entry point and enter OPTEE */ cm_set_elr_el3(SECURE, (uint64_t) &optee_vectors->cpu_off_entry); rc = opteed_synchronous_sp_entry(optee_ctx); /* * Read the response from OPTEE. A non-zero return means that * something went wrong while communicating with OPTEE. */ if (rc != 0) panic(); /* * Reset OPTEE's context for a fresh start when this cpu is turned on * subsequently. */ set_optee_pstate(optee_ctx->state, OPTEE_PSTATE_OFF); return 0; } /******************************************************************************* * This cpu is being suspended. S-EL1 state must have been saved in the * resident cpu (mpidr format) if it is a UP/UP migratable OPTEE. ******************************************************************************/ static void opteed_cpu_suspend_handler(uint64_t max_off_pwrlvl) { int32_t rc = 0; uint32_t linear_id = plat_my_core_pos(); optee_context_t *optee_ctx = &opteed_sp_context[linear_id]; assert(optee_vectors); assert(get_optee_pstate(optee_ctx->state) == OPTEE_PSTATE_ON); /* Program the entry point and enter OPTEE */ cm_set_elr_el3(SECURE, (uint64_t) &optee_vectors->cpu_suspend_entry); rc = opteed_synchronous_sp_entry(optee_ctx); /* * Read the response from OPTEE. A non-zero return means that * something went wrong while communicating with OPTEE. */ if (rc != 0) panic(); /* Update its context to reflect the state OPTEE is in */ set_optee_pstate(optee_ctx->state, OPTEE_PSTATE_SUSPEND); } /******************************************************************************* * This cpu has been turned on. Enter OPTEE to initialise S-EL1 and other bits * before passing control back to the Secure Monitor. Entry in S-El1 is done * after initialising minimal architectural state that guarantees safe * execution. ******************************************************************************/ static void opteed_cpu_on_finish_handler(uint64_t unused) { int32_t rc = 0; uint32_t linear_id = plat_my_core_pos(); optee_context_t *optee_ctx = &opteed_sp_context[linear_id]; entry_point_info_t optee_on_entrypoint; assert(optee_vectors); assert(get_optee_pstate(optee_ctx->state) == OPTEE_PSTATE_OFF); opteed_init_optee_ep_state(&optee_on_entrypoint, opteed_rw, (uint64_t)&optee_vectors->cpu_on_entry, 0, 0, optee_ctx); /* Initialise this cpu's secure context */ cm_init_my_context(&optee_on_entrypoint); /* Enter OPTEE */ rc = opteed_synchronous_sp_entry(optee_ctx); /* * Read the response from OPTEE. A non-zero return means that * something went wrong while communicating with OPTEE. */ if (rc != 0) panic(); /* Update its context to reflect the state OPTEE is in */ set_optee_pstate(optee_ctx->state, OPTEE_PSTATE_ON); } /******************************************************************************* * This cpu has resumed from suspend. The OPTEED saved the OPTEE context when it * completed the preceding suspend call. Use that context to program an entry * into OPTEE to allow it to do any remaining book keeping ******************************************************************************/ static void opteed_cpu_suspend_finish_handler(uint64_t max_off_pwrlvl) { int32_t rc = 0; uint32_t linear_id = plat_my_core_pos(); optee_context_t *optee_ctx = &opteed_sp_context[linear_id]; assert(optee_vectors); assert(get_optee_pstate(optee_ctx->state) == OPTEE_PSTATE_SUSPEND); /* Program the entry point, max_off_pwrlvl and enter the SP */ write_ctx_reg(get_gpregs_ctx(&optee_ctx->cpu_ctx), CTX_GPREG_X0, max_off_pwrlvl); cm_set_elr_el3(SECURE, (uint64_t) &optee_vectors->cpu_resume_entry); rc = opteed_synchronous_sp_entry(optee_ctx); /* * Read the response from OPTEE. A non-zero return means that * something went wrong while communicating with OPTEE. */ if (rc != 0) panic(); /* Update its context to reflect the state OPTEE is in */ set_optee_pstate(optee_ctx->state, OPTEE_PSTATE_ON); } /******************************************************************************* * Return the type of OPTEE the OPTEED is dealing with. Report the current * resident cpu (mpidr format) if it is a UP/UP migratable OPTEE. ******************************************************************************/ static int32_t opteed_cpu_migrate_info(uint64_t *resident_cpu) { return OPTEE_MIGRATE_INFO; } /******************************************************************************* * System is about to be switched off. Allow the OPTEED/OPTEE to perform * any actions needed. ******************************************************************************/ static void opteed_system_off(void) { uint32_t linear_id = plat_my_core_pos(); optee_context_t *optee_ctx = &opteed_sp_context[linear_id]; assert(optee_vectors); assert(get_optee_pstate(optee_ctx->state) == OPTEE_PSTATE_ON); /* Program the entry point */ cm_set_elr_el3(SECURE, (uint64_t) &optee_vectors->system_off_entry); /* Enter OPTEE. We do not care about the return value because we * must continue the shutdown anyway */ opteed_synchronous_sp_entry(optee_ctx); } /******************************************************************************* * System is about to be reset. Allow the OPTEED/OPTEE to perform * any actions needed. ******************************************************************************/ static void opteed_system_reset(void) { uint32_t linear_id = plat_my_core_pos(); optee_context_t *optee_ctx = &opteed_sp_context[linear_id]; assert(optee_vectors); assert(get_optee_pstate(optee_ctx->state) == OPTEE_PSTATE_ON); /* Program the entry point */ cm_set_elr_el3(SECURE, (uint64_t) &optee_vectors->system_reset_entry); /* Enter OPTEE. We do not care about the return value because we * must continue the reset anyway */ opteed_synchronous_sp_entry(optee_ctx); } /******************************************************************************* * Structure populated by the OPTEE Dispatcher to be given a chance to * perform any OPTEE bookkeeping before PSCI executes a power mgmt. * operation. ******************************************************************************/ const spd_pm_ops_t opteed_pm = { .svc_on = opteed_cpu_on_handler, .svc_off = opteed_cpu_off_handler, .svc_suspend = opteed_cpu_suspend_handler, .svc_on_finish = opteed_cpu_on_finish_handler, .svc_suspend_finish = opteed_cpu_suspend_finish_handler, .svc_migrate = NULL, .svc_migrate_info = opteed_cpu_migrate_info, .svc_system_off = opteed_system_off, .svc_system_reset = opteed_system_reset, };