diff options
Diffstat (limited to 'services/std_svc/psci/psci_afflvl_off.c')
| -rw-r--r-- | services/std_svc/psci/psci_afflvl_off.c | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/services/std_svc/psci/psci_afflvl_off.c b/services/std_svc/psci/psci_afflvl_off.c deleted file mode 100644 index 7eb96889..00000000 --- a/services/std_svc/psci/psci_afflvl_off.c +++ /dev/null @@ -1,248 +0,0 @@ -/* - * Copyright (c) 2013-2014, 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 <debug.h> -#include <string.h> -#include "psci_private.h" - -typedef void (*afflvl_off_handler_t)(aff_map_node_t *node); - -/******************************************************************************* - * The next three functions implement a handler for each supported affinity - * level which is called when that affinity level is turned off. - ******************************************************************************/ -static void psci_afflvl0_off(aff_map_node_t *cpu_node) -{ - assert(cpu_node->level == MPIDR_AFFLVL0); - - /* - * Arch. management. Perform the necessary steps to flush all - * cpu caches. - */ - psci_do_pwrdown_cache_maintenance(MPIDR_AFFLVL0); - - /* - * Plat. management: Perform platform specific actions to turn this - * cpu off e.g. exit cpu coherency, program the power controller etc. - */ - psci_plat_pm_ops->affinst_off(cpu_node->level, - psci_get_phys_state(cpu_node)); -} - -static void psci_afflvl1_off(aff_map_node_t *cluster_node) -{ - /* Sanity check the cluster level */ - assert(cluster_node->level == MPIDR_AFFLVL1); - - /* - * Arch. Management. Flush all levels of caches to PoC if - * the cluster is to be shutdown. - */ - psci_do_pwrdown_cache_maintenance(MPIDR_AFFLVL1); - - /* - * Plat. Management. Allow the platform to do its cluster - * specific bookeeping e.g. turn off interconnect coherency, - * program the power controller etc. - */ - psci_plat_pm_ops->affinst_off(cluster_node->level, - psci_get_phys_state(cluster_node)); -} - -static void psci_afflvl2_off(aff_map_node_t *system_node) -{ - /* Cannot go beyond this level */ - assert(system_node->level == MPIDR_AFFLVL2); - - /* - * Keep the physical state of the system handy to decide what - * action needs to be taken - */ - - /* - * Arch. Management. Flush all levels of caches to PoC if - * the system is to be shutdown. - */ - psci_do_pwrdown_cache_maintenance(MPIDR_AFFLVL2); - - /* - * Plat. Management : Allow the platform to do its bookeeping - * at this affinity level - */ - psci_plat_pm_ops->affinst_off(system_node->level, - psci_get_phys_state(system_node)); -} - -static const afflvl_off_handler_t psci_afflvl_off_handlers[] = { - psci_afflvl0_off, - psci_afflvl1_off, - psci_afflvl2_off, -}; - -/******************************************************************************* - * This function takes an array of pointers to affinity instance nodes in the - * topology tree and calls the off handler for the corresponding affinity - * levels - ******************************************************************************/ -static void psci_call_off_handlers(aff_map_node_t *mpidr_nodes[], - int start_afflvl, - int end_afflvl) -{ - int level; - aff_map_node_t *node; - - for (level = start_afflvl; level <= end_afflvl; level++) { - node = mpidr_nodes[level]; - if (node == NULL) - continue; - - psci_afflvl_off_handlers[level](node); - } -} - -/******************************************************************************* - * Top level handler which is called when a cpu wants to power itself down. - * It's assumed that along with turning the cpu off, higher affinity levels will - * be turned off as far as possible. It traverses through all the affinity - * levels performing generic, architectural, platform setup and state management - * e.g. for a cluster that's to be powered off, it will call the platform - * specific code which will disable coherency at the interconnect level if the - * cpu is the last in the cluster. For a cpu it could mean programming the power - * the power controller etc. - * - * The state of all the relevant affinity levels is changed prior to calling the - * affinity level specific handlers as their actions would depend upon the state - * the affinity level is about to enter. - * - * The affinity level specific handlers are called in ascending order i.e. from - * the lowest to the highest affinity level implemented by the platform because - * to turn off affinity level X it is neccesary to turn off affinity level X - 1 - * first. - ******************************************************************************/ -int psci_afflvl_off(int start_afflvl, - int end_afflvl) -{ - int rc; - mpidr_aff_map_nodes_t mpidr_nodes; - unsigned int max_phys_off_afflvl; - - /* - * This function must only be called on platforms where the - * CPU_OFF platform hooks have been implemented. - */ - assert(psci_plat_pm_ops->affinst_off); - - /* - * Collect the pointers to the nodes in the topology tree for - * each affinity instance in the mpidr. If this function does - * not return successfully then either the mpidr or the affinity - * levels are incorrect. Either way, this an internal TF error - * therefore assert. - */ - rc = psci_get_aff_map_nodes(read_mpidr_el1() & MPIDR_AFFINITY_MASK, - start_afflvl, - end_afflvl, - mpidr_nodes); - assert(rc == PSCI_E_SUCCESS); - - /* - * This function acquires the lock corresponding to each affinity - * level so that by the time all locks are taken, the system topology - * is snapshot and state management can be done safely. - */ - psci_acquire_afflvl_locks(start_afflvl, - end_afflvl, - mpidr_nodes); - - - /* - * Call the cpu off handler registered by the Secure Payload Dispatcher - * to let it do any bookkeeping. Assume that the SPD always reports an - * E_DENIED error if SP refuse to power down - */ - if (psci_spd_pm && psci_spd_pm->svc_off) { - rc = psci_spd_pm->svc_off(0); - if (rc) - goto exit; - } - - /* - * This function updates the state of each affinity instance - * corresponding to the mpidr in the range of affinity levels - * specified. - */ - psci_do_afflvl_state_mgmt(start_afflvl, - end_afflvl, - mpidr_nodes, - PSCI_STATE_OFF); - - max_phys_off_afflvl = psci_find_max_phys_off_afflvl(start_afflvl, - end_afflvl, - mpidr_nodes); - assert(max_phys_off_afflvl != PSCI_INVALID_DATA); - - /* Stash the highest affinity level that will enter the OFF state. */ - psci_set_max_phys_off_afflvl(max_phys_off_afflvl); - - /* Perform generic, architecture and platform specific handling */ - psci_call_off_handlers(mpidr_nodes, - start_afflvl, - end_afflvl); - - /* - * Invalidate the entry for the highest affinity level stashed earlier. - * This ensures that any reads of this variable outside the power - * up/down sequences return PSCI_INVALID_DATA. - * - */ - psci_set_max_phys_off_afflvl(PSCI_INVALID_DATA); - -exit: - /* - * Release the locks corresponding to each affinity level in the - * reverse order to which they were acquired. - */ - psci_release_afflvl_locks(start_afflvl, - end_afflvl, - mpidr_nodes); - - /* - * Check if all actions needed to safely power down this cpu have - * successfully completed. Enter a wfi loop which will allow the - * power controller to physically power down this cpu. - */ - if (rc == PSCI_E_SUCCESS) - psci_power_down_wfi(); - - return rc; -} |