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Diffstat (limited to 'services/std_svc/psci/psci_on.c')
| -rw-r--r-- | services/std_svc/psci/psci_on.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/services/std_svc/psci/psci_on.c b/services/std_svc/psci/psci_on.c deleted file mode 100644 index c8c36cd0..00000000 --- a/services/std_svc/psci/psci_on.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * Neither the name of ARM nor the names of its contributors may be used - * to endorse or promote products derived from this software without specific - * prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <arch.h> -#include <arch_helpers.h> -#include <assert.h> -#include <bl_common.h> -#include <bl31.h> -#include <debug.h> -#include <context_mgmt.h> -#include <platform.h> -#include <runtime_svc.h> -#include <stddef.h> -#include "psci_private.h" - -/******************************************************************************* - * This function checks whether a cpu which has been requested to be turned on - * is OFF to begin with. - ******************************************************************************/ -static int cpu_on_validate_state(aff_info_state_t aff_state) -{ - if (aff_state == AFF_STATE_ON) - return PSCI_E_ALREADY_ON; - - if (aff_state == AFF_STATE_ON_PENDING) - return PSCI_E_ON_PENDING; - - assert(aff_state == AFF_STATE_OFF); - return PSCI_E_SUCCESS; -} - -/******************************************************************************* - * Generic handler which is called to physically power on a cpu identified by - * its mpidr. It performs the generic, architectural, platform setup and state - * management to power on the target cpu e.g. it will ensure that - * enough information is stashed for it to resume execution in the non-secure - * security state. - * - * The state of all the relevant power domains are changed after calling the - * platform handler as it can return error. - ******************************************************************************/ -int psci_cpu_on_start(u_register_t target_cpu, - entry_point_info_t *ep) -{ - int rc; - unsigned int target_idx = plat_core_pos_by_mpidr(target_cpu); - aff_info_state_t target_aff_state; - - /* Calling function must supply valid input arguments */ - assert((int) target_idx >= 0); - assert(ep != NULL); - - /* - * This function must only be called on platforms where the - * CPU_ON platform hooks have been implemented. - */ - assert(psci_plat_pm_ops->pwr_domain_on && - psci_plat_pm_ops->pwr_domain_on_finish); - - /* Protect against multiple CPUs trying to turn ON the same target CPU */ - psci_spin_lock_cpu(target_idx); - - /* - * Generic management: Ensure that the cpu is off to be - * turned on. - */ - rc = cpu_on_validate_state(psci_get_aff_info_state_by_idx(target_idx)); - if (rc != PSCI_E_SUCCESS) - goto exit; - - /* - * Call the cpu on handler registered by the Secure Payload Dispatcher - * to let it do any bookeeping. If the handler encounters an error, it's - * expected to assert within - */ - if (psci_spd_pm && psci_spd_pm->svc_on) - psci_spd_pm->svc_on(target_cpu); - - /* - * Set the Affinity info state of the target cpu to ON_PENDING. - * Flush aff_info_state as it will be accessed with caches - * turned OFF. - */ - psci_set_aff_info_state_by_idx(target_idx, AFF_STATE_ON_PENDING); - flush_cpu_data_by_index(target_idx, psci_svc_cpu_data.aff_info_state); - - /* - * The cache line invalidation by the target CPU after setting the - * state to OFF (see psci_do_cpu_off()), could cause the update to - * aff_info_state to be invalidated. Retry the update if the target - * CPU aff_info_state is not ON_PENDING. - */ - target_aff_state = psci_get_aff_info_state_by_idx(target_idx); - if (target_aff_state != AFF_STATE_ON_PENDING) { - assert(target_aff_state == AFF_STATE_OFF); - psci_set_aff_info_state_by_idx(target_idx, AFF_STATE_ON_PENDING); - flush_cpu_data_by_index(target_idx, psci_svc_cpu_data.aff_info_state); - - assert(psci_get_aff_info_state_by_idx(target_idx) == AFF_STATE_ON_PENDING); - } - - /* - * Perform generic, architecture and platform specific handling. - */ - /* - * Plat. management: Give the platform the current state - * of the target cpu to allow it to perform the necessary - * steps to power on. - */ - rc = psci_plat_pm_ops->pwr_domain_on(target_cpu); - assert(rc == PSCI_E_SUCCESS || rc == PSCI_E_INTERN_FAIL); - - if (rc == PSCI_E_SUCCESS) - /* Store the re-entry information for the non-secure world. */ - cm_init_context_by_index(target_idx, ep); - else { - /* Restore the state on error. */ - psci_set_aff_info_state_by_idx(target_idx, AFF_STATE_OFF); - flush_cpu_data_by_index(target_idx, psci_svc_cpu_data.aff_info_state); - } - -exit: - psci_spin_unlock_cpu(target_idx); - return rc; -} - -/******************************************************************************* - * The following function finish an earlier power on request. They - * are called by the common finisher routine in psci_common.c. The `state_info` - * is the psci_power_state from which this CPU has woken up from. - ******************************************************************************/ -void psci_cpu_on_finish(unsigned int cpu_idx, - psci_power_state_t *state_info) -{ - /* - * Plat. management: Perform the platform specific actions - * for this cpu e.g. enabling the gic or zeroing the mailbox - * register. The actual state of this cpu has already been - * changed. - */ - psci_plat_pm_ops->pwr_domain_on_finish(state_info); - - /* - * Arch. management: Enable data cache and manage stack memory - */ - psci_do_pwrup_cache_maintenance(); - - /* - * All the platform specific actions for turning this cpu - * on have completed. Perform enough arch.initialization - * to run in the non-secure address space. - */ - bl31_arch_setup(); - - /* - * Lock the CPU spin lock to make sure that the context initialization - * is done. Since the lock is only used in this function to create - * a synchronization point with cpu_on_start(), it can be released - * immediately. - */ - psci_spin_lock_cpu(cpu_idx); - psci_spin_unlock_cpu(cpu_idx); - - /* Ensure we have been explicitly woken up by another cpu */ - assert(psci_get_aff_info_state() == AFF_STATE_ON_PENDING); - - /* - * Call the cpu on finish handler registered by the Secure Payload - * Dispatcher to let it do any bookeeping. If the handler encounters an - * error, it's expected to assert within - */ - if (psci_spd_pm && psci_spd_pm->svc_on_finish) - psci_spd_pm->svc_on_finish(0); - - /* Populate the mpidr field within the cpu node array */ - /* This needs to be done only once */ - psci_cpu_pd_nodes[cpu_idx].mpidr = read_mpidr() & MPIDR_AFFINITY_MASK; - - /* - * Generic management: Now we just need to retrieve the - * information that we had stashed away during the cpu_on - * call to set this cpu on its way. - */ - cm_prepare_el3_exit(NON_SECURE); -} |