zynqmp: pm: Provide state argument to the pm_self_suspend API call
The state argument of the pm_self_suspend API encodes the state to which the APU intends to suspend. The state can be: - PM_APU_STATE_CPU_IDLE - processor power down, all memories remain on - PM_APU_STATE_SUSPEND_TO_RAM - all processors powered down, L2$ powered down, all OCM banks in retention and DDR in self-refresh. The calls for setting requirements for L2$ and OCM banks are now redundant and removed. Signed-off-by: Filip Drazic <filip.drazic@aggios.com> [ sb - remove redundant #defines ] Signed-off-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
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@ -147,7 +147,7 @@ static void zynqmp_pwr_domain_off(const psci_power_state_t *target_state)
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* invoking CPU_on function, during which resume address will
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* be set.
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*/
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pm_self_suspend(proc->node_id, MAX_LATENCY, 0, 0);
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pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0);
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}
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static void zynqmp_nopmu_pwr_domain_suspend(const psci_power_state_t *target_state)
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@ -179,6 +179,7 @@ static void zynqmp_nopmu_pwr_domain_suspend(const psci_power_state_t *target_sta
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static void zynqmp_pwr_domain_suspend(const psci_power_state_t *target_state)
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{
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unsigned int state;
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unsigned int cpu_id = plat_my_core_pos();
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const struct pm_proc *proc = pm_get_proc(cpu_id);
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@ -186,15 +187,14 @@ static void zynqmp_pwr_domain_suspend(const psci_power_state_t *target_state)
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VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
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__func__, i, target_state->pwr_domain_state[i]);
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state = target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE ?
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PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE;
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/* Send request to PMU to suspend this core */
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pm_self_suspend(proc->node_id, MAX_LATENCY, 0, zynqmp_sec_entry);
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pm_self_suspend(proc->node_id, MAX_LATENCY, state, zynqmp_sec_entry);
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/* APU is to be turned off */
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if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
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/* Power down L2 cache */
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pm_set_requirement(NODE_L2, 0, 0, REQ_ACK_NO);
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/* Send request for OCM retention state */
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set_ocm_retention();
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/* disable coherency */
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plat_arm_interconnect_exit_coherency();
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}
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@ -76,7 +76,7 @@
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* pm_self_suspend() - PM call for processor to suspend itself
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* @nid Node id of the processor or subsystem
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* @latency Requested maximum wakeup latency (not supported)
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* @state Requested state (not supported)
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* @state Requested state
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* @address Resume address
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*
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* This is a blocking call, it will return only once PMU has responded.
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@ -43,16 +43,10 @@
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#include "pm_ipi.h"
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#include "../zynqmp_def.h"
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#define OCM_BANK_0 0xFFFC0000
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#define OCM_BANK_1 (OCM_BANK_0 + 0x10000)
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#define OCM_BANK_2 (OCM_BANK_1 + 0x10000)
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#define OCM_BANK_3 (OCM_BANK_2 + 0x10000)
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#define UNDEFINED_CPUID (~0)
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DEFINE_BAKERY_LOCK(pm_client_secure_lock);
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/* Declaration of linker defined symbol */
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extern unsigned long __BL31_END__;
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extern const struct pm_ipi apu_ipi;
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/* Order in pm_procs_all array must match cpu ids */
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@ -79,38 +73,6 @@ static const struct pm_proc const pm_procs_all[] = {
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},
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};
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/**
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* set_ocm_retention() - Configure OCM memory banks for retention
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*
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* APU specific requirements for suspend action:
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* OCM has to enter retention state in order to preserve saved
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* context after suspend request. OCM banks are determined by
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* __BL31_END__ linker symbol.
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*
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* Return: Returns status, either success or error+reason
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*/
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enum pm_ret_status set_ocm_retention(void)
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{
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enum pm_ret_status ret;
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/* OCM_BANK_0 will always be occupied */
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ret = pm_set_requirement(NODE_OCM_BANK_0, PM_CAP_CONTEXT, 0,
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REQ_ACK_NO);
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/* Check for other OCM banks */
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if ((unsigned long)&__BL31_END__ >= OCM_BANK_1)
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ret = pm_set_requirement(NODE_OCM_BANK_1, PM_CAP_CONTEXT, 0,
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REQ_ACK_NO);
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if ((unsigned long)&__BL31_END__ >= OCM_BANK_2)
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ret = pm_set_requirement(NODE_OCM_BANK_2, PM_CAP_CONTEXT, 0,
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REQ_ACK_NO);
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if ((unsigned long)&__BL31_END__ >= OCM_BANK_3)
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ret = pm_set_requirement(NODE_OCM_BANK_3, PM_CAP_CONTEXT, 0,
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REQ_ACK_NO);
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return ret;
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}
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/**
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* pm_get_proc() - returns pointer to the proc structure
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* @cpuid: id of the cpu whose proc struct pointer should be returned
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@ -53,6 +53,10 @@
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#define MAX_LATENCY (~0U)
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#define MAX_QOS 100U
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/* State arguments of the self suspend */
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#define PM_STATE_CPU_IDLE 0x0U
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#define PM_STATE_SUSPEND_TO_RAM 0xFU
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/*********************************************************************
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* Enum definitions
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********************************************************************/
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