static int psci_afflvl2_off(unsigned long mpidr, aff_map_node *system_node)
{
int rc = PSCI_E_SUCCESS;
unsigned int plat_state;
/* Cannot go beyond this level */
assert(system_node->level == MPIDR_AFFLVL2);
/* State management: Decrement the system reference count */
psci_set_state(system_node, PSCI_STATE_OFF);
/*
* Keep the physical state of the system handy to decide what
* action needs to be taken
*/
plat_state = psci_get_phys_state(system_node);
/* No arch. and generic bookeeping to do here currently */
/*
* Plat. Management : Allow the platform to do its bookeeping
* at this affinity level
*/
if (psci_plat_pm_ops->affinst_off)
rc = psci_plat_pm_ops->affinst_off(mpidr,
system_node->level,
plat_state);
return rc;
}
/*******************************************************************************
* This function is passed an array of pointers to affinity level nodes in the
* topology tree for an mpidr and the state which each node should transition
* to. It updates the state of each node between the specified affinity levels.
******************************************************************************/
void psci_do_afflvl_state_mgmt(uint32_t start_afflvl,
uint32_t end_afflvl,
aff_map_node_t *mpidr_nodes[],
uint32_t state)
{
uint32_t level;
for (level = start_afflvl; level <= end_afflvl; level++) {
if (mpidr_nodes[level] == NULL)
continue;
psci_set_state(mpidr_nodes[level], state);
}
}
static int psci_afflvl1_off(unsigned long mpidr, aff_map_node *cluster_node)
{
int rc = PSCI_E_SUCCESS;
unsigned int plat_state;
/* Sanity check the cluster level */
assert(cluster_node->level == MPIDR_AFFLVL1);
/* State management: Decrement the cluster reference count */
psci_set_state(cluster_node, PSCI_STATE_OFF);
/*
* Keep the physical state of this cluster handy to decide
* what action needs to be taken
*/
plat_state = psci_get_phys_state(cluster_node);
/*
* Arch. Management. Flush all levels of caches to PoC if
* the cluster is to be shutdown
*/
if (plat_state == PSCI_STATE_OFF)
dcsw_op_all(DCCISW);
/*
* Plat. Management. Allow the platform to do its cluster
* specific bookeeping e.g. turn off interconnect coherency,
* program the power controller etc.
*/
if (psci_plat_pm_ops->affinst_off)
rc = psci_plat_pm_ops->affinst_off(mpidr,
cluster_node->level,
plat_state);
return rc;
}
/*******************************************************************************
* The next three functions implement a handler for each supported affinity
* level which is called when that affinity level is turned off.
******************************************************************************/
static int psci_afflvl0_off(unsigned long mpidr, aff_map_node *cpu_node)
{
unsigned int index, plat_state;
int rc = PSCI_E_SUCCESS;
unsigned long sctlr;
assert(cpu_node->level == MPIDR_AFFLVL0);
/* State management: mark this cpu as turned off */
psci_set_state(cpu_node, PSCI_STATE_OFF);
/*
* Generic management: Get the index for clearing any lingering re-entry
* information and allow the secure world to switch itself off
*/
/*
* Call the cpu off handler registered by the Secure Payload Dispatcher
* to let it do any bookeeping. 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)
return rc;
}
index = cpu_node->data;
memset(&psci_ns_entry_info[index], 0, sizeof(psci_ns_entry_info[index]));
/*
* Arch. management. Perform the necessary steps to flush all
* cpu caches.
*
* TODO: This power down sequence varies across cpus so it needs to be
* abstracted out on the basis of the MIDR like in cpu_reset_handler().
* Do the bare minimal for the time being. Fix this before porting to
* Cortex models.
*/
sctlr = read_sctlr_el3();
sctlr &= ~SCTLR_C_BIT;
write_sctlr_el3(sctlr);
/*
* CAUTION: This flush to the level of unification makes an assumption
* about the cache hierarchy at affinity level 0 (cpu) in the platform.
* Ideally the platform should tell psci which levels to flush to exit
* coherency.
*/
dcsw_op_louis(DCCISW);
/*
* Plat. management: Perform platform specific actions to turn this
* cpu off e.g. exit cpu coherency, program the power controller etc.
*/
if (psci_plat_pm_ops->affinst_off) {
/* Get the current physical state of this cpu */
plat_state = psci_get_phys_state(cpu_node);
rc = psci_plat_pm_ops->affinst_off(mpidr,
cpu_node->level,
plat_state);
}
return rc;
}
