mediatek: mt8195: Add CPU hotplug and MCDI support
Implement PSCI platform OPs to support CPU hotplug and MCDI.
Change-Id: I1321f7989c8a3d116d698768a7146e8f180ee9c0
diff --git a/plat/mediatek/mt8195/plat_pm.c b/plat/mediatek/mt8195/plat_pm.c
index 61d2cc9..48ab6ae 100644
--- a/plat/mediatek/mt8195/plat_pm.c
+++ b/plat/mediatek/mt8195/plat_pm.c
@@ -4,15 +4,361 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
+/* common headers */
+#include <assert.h>
+
+#include <arch_helpers.h>
+#include <common/debug.h>
#include <lib/psci/psci.h>
+/* platform specific headers */
+#include <mt_gic_v3.h>
+#include <mtspmc.h>
+#include <plat/common/platform.h>
+#include <plat_mtk_lpm.h>
+#include <plat_pm.h>
+
+/*
+ * Cluster state request:
+ * [0] : The CPU requires cluster power down
+ * [1] : The CPU requires cluster power on
+ */
+#define coordinate_cluster(onoff) write_clusterpwrdn_el1(onoff)
+#define coordinate_cluster_pwron() coordinate_cluster(1)
+#define coordinate_cluster_pwroff() coordinate_cluster(0)
+
+/* platform secure entry point */
+static uintptr_t secure_entrypoint;
+/* per-CPU power state */
+static unsigned int plat_power_state[PLATFORM_CORE_COUNT];
+
+/* platform CPU power domain - ops */
+static const struct mt_lpm_tz *plat_mt_pm;
+
+#define plat_mt_pm_invoke(_name, _cpu, _state) ({ \
+ int ret = -1; \
+ if (plat_mt_pm != NULL && plat_mt_pm->_name != NULL) { \
+ ret = plat_mt_pm->_name(_cpu, _state); \
+ } \
+ ret; })
+
+#define plat_mt_pm_invoke_no_check(_name, _cpu, _state) ({ \
+ if (plat_mt_pm != NULL && plat_mt_pm->_name != NULL) { \
+ (void) plat_mt_pm->_name(_cpu, _state); \
+ } \
+ })
+
+/*
+ * Common MTK_platform operations to power on/off a
+ * CPU in response to a CPU_ON, CPU_OFF or CPU_SUSPEND request.
+ */
+
+static void plat_cpu_pwrdwn_common(unsigned int cpu,
+ const psci_power_state_t *state, unsigned int req_pstate)
+{
+ assert(cpu == plat_my_core_pos());
+
+ plat_mt_pm_invoke_no_check(pwr_cpu_dwn, cpu, state);
+
+ if ((psci_get_pstate_pwrlvl(req_pstate) >= MTK_AFFLVL_CLUSTER) ||
+ (req_pstate == 0U)) { /* hotplug off */
+ coordinate_cluster_pwroff();
+ }
+
+ /* Prevent interrupts from spuriously waking up this CPU */
+ mt_gic_rdistif_save();
+ gicv3_cpuif_disable(cpu);
+ gicv3_rdistif_off(cpu);
+}
+
+static void plat_cpu_pwron_common(unsigned int cpu,
+ const psci_power_state_t *state, unsigned int req_pstate)
+{
+ assert(cpu == plat_my_core_pos());
+
+ plat_mt_pm_invoke_no_check(pwr_cpu_on, cpu, state);
+
+ coordinate_cluster_pwron();
+
+ /* Enable the GIC CPU interface */
+ gicv3_rdistif_on(cpu);
+ gicv3_cpuif_enable(cpu);
+ mt_gic_rdistif_init();
+
+ /*
+ * If mcusys does power down before then restore
+ * all CPUs' GIC Redistributors
+ */
+ if (IS_MCUSYS_OFF_STATE(state)) {
+ mt_gic_rdistif_restore_all();
+ } else {
+ mt_gic_rdistif_restore();
+ }
+}
+
+/*
+ * Common MTK_platform operations to power on/off a
+ * cluster in response to a CPU_ON, CPU_OFF or CPU_SUSPEND request.
+ */
+
+static void plat_cluster_pwrdwn_common(unsigned int cpu,
+ const psci_power_state_t *state, unsigned int req_pstate)
+{
+ assert(cpu == plat_my_core_pos());
+
+ if (plat_mt_pm_invoke(pwr_cluster_dwn, cpu, state) != 0) {
+ coordinate_cluster_pwron();
+
+ /* TODO: return on fail.
+ * Add a 'return' here before adding any code following
+ * the if-block.
+ */
+ }
+}
+
+static void plat_cluster_pwron_common(unsigned int cpu,
+ const psci_power_state_t *state, unsigned int req_pstate)
+{
+ assert(cpu == plat_my_core_pos());
+
+ if (plat_mt_pm_invoke(pwr_cluster_on, cpu, state) != 0) {
+ /* TODO: return on fail.
+ * Add a 'return' here before adding any code following
+ * the if-block.
+ */
+ }
+}
+
+/*
+ * Common MTK_platform operations to power on/off a
+ * mcusys in response to a CPU_ON, CPU_OFF or CPU_SUSPEND request.
+ */
+
+static void plat_mcusys_pwrdwn_common(unsigned int cpu,
+ const psci_power_state_t *state, unsigned int req_pstate)
+{
+ assert(cpu == plat_my_core_pos());
+
+ if (plat_mt_pm_invoke(pwr_mcusys_dwn, cpu, state) != 0) {
+ return; /* return on fail */
+ }
+
+ mt_gic_distif_save();
+ gic_sgi_save_all();
+}
+
+static void plat_mcusys_pwron_common(unsigned int cpu,
+ const psci_power_state_t *state, unsigned int req_pstate)
+{
+ assert(cpu == plat_my_core_pos());
+
+ if (plat_mt_pm_invoke(pwr_mcusys_on, cpu, state) != 0) {
+ return; /* return on fail */
+ }
+
+ mt_gic_init();
+ mt_gic_distif_restore();
+ gic_sgi_restore_all();
+
+ plat_mt_pm_invoke_no_check(pwr_mcusys_on_finished, cpu, state);
+}
+
+/*
+ * plat_psci_ops implementation
+ */
+
+static void plat_cpu_standby(plat_local_state_t cpu_state)
+{
+ uint64_t scr;
+
+ scr = read_scr_el3();
+ write_scr_el3(scr | SCR_IRQ_BIT | SCR_FIQ_BIT);
+
+ isb();
+ dsb();
+ wfi();
+
+ write_scr_el3(scr);
+}
+
+static int plat_power_domain_on(u_register_t mpidr)
+{
+ unsigned int cpu = (unsigned int)plat_core_pos_by_mpidr(mpidr);
+ unsigned int cluster = 0U;
+
+ if (cpu >= PLATFORM_CORE_COUNT) {
+ return PSCI_E_INVALID_PARAMS;
+ }
+
+ if (!spm_get_cluster_powerstate(cluster)) {
+ spm_poweron_cluster(cluster);
+ }
+
+ /* init CPU reset arch as AARCH64 */
+ mcucfg_init_archstate(cluster, cpu, true);
+ mcucfg_set_bootaddr(cluster, cpu, secure_entrypoint);
+ spm_poweron_cpu(cluster, cpu);
+
+ return PSCI_E_SUCCESS;
+}
+
+static void plat_power_domain_on_finish(const psci_power_state_t *state)
+{
+ unsigned long mpidr = read_mpidr_el1();
+ unsigned int cpu = (unsigned int)plat_core_pos_by_mpidr(mpidr);
+
+ assert(cpu < PLATFORM_CORE_COUNT);
+
+ /* Allow IRQs to wakeup this core in IDLE flow */
+ mcucfg_enable_gic_wakeup(0U, cpu);
+
+ if (IS_CLUSTER_OFF_STATE(state)) {
+ plat_cluster_pwron_common(cpu, state, 0U);
+ }
+
+ plat_cpu_pwron_common(cpu, state, 0U);
+}
+
+static void plat_power_domain_off(const psci_power_state_t *state)
+{
+ unsigned long mpidr = read_mpidr_el1();
+ unsigned int cpu = (unsigned int)plat_core_pos_by_mpidr(mpidr);
+
+ assert(cpu < PLATFORM_CORE_COUNT);
+
+ plat_cpu_pwrdwn_common(cpu, state, 0U);
+ spm_poweroff_cpu(0U, cpu);
+
+ /* prevent unintended IRQs from waking up the hot-unplugged core */
+ mcucfg_disable_gic_wakeup(0U, cpu);
+
+ if (IS_CLUSTER_OFF_STATE(state)) {
+ plat_cluster_pwrdwn_common(cpu, state, 0U);
+ }
+}
+
+static void plat_power_domain_suspend(const psci_power_state_t *state)
+{
+ unsigned int cpu = plat_my_core_pos();
+
+ assert(cpu < PLATFORM_CORE_COUNT);
+
+ plat_mt_pm_invoke_no_check(pwr_prompt, cpu, state);
+
+ /* Perform the common CPU specific operations */
+ plat_cpu_pwrdwn_common(cpu, state, plat_power_state[cpu]);
+
+ if (IS_CLUSTER_OFF_STATE(state)) {
+ /* Perform the common cluster specific operations */
+ plat_cluster_pwrdwn_common(cpu, state, plat_power_state[cpu]);
+ }
+
+ if (IS_MCUSYS_OFF_STATE(state)) {
+ /* Perform the common mcusys specific operations */
+ plat_mcusys_pwrdwn_common(cpu, state, plat_power_state[cpu]);
+ }
+}
+
+static void plat_power_domain_suspend_finish(const psci_power_state_t *state)
+{
+ unsigned int cpu = plat_my_core_pos();
+
+ assert(cpu < PLATFORM_CORE_COUNT);
+
+ if (IS_MCUSYS_OFF_STATE(state)) {
+ /* Perform the common mcusys specific operations */
+ plat_mcusys_pwron_common(cpu, state, plat_power_state[cpu]);
+ }
+
+ if (IS_CLUSTER_OFF_STATE(state)) {
+ /* Perform the common cluster specific operations */
+ plat_cluster_pwron_common(cpu, state, plat_power_state[cpu]);
+ }
+
+ /* Perform the common CPU specific operations */
+ plat_cpu_pwron_common(cpu, state, plat_power_state[cpu]);
+
+ plat_mt_pm_invoke_no_check(pwr_reflect, cpu, state);
+}
+
+static int plat_validate_power_state(unsigned int power_state,
+ psci_power_state_t *req_state)
+{
+ unsigned int pstate = psci_get_pstate_type(power_state);
+ unsigned int aff_lvl = psci_get_pstate_pwrlvl(power_state);
+ unsigned int cpu = plat_my_core_pos();
+
+ if (aff_lvl > PLAT_MAX_PWR_LVL) {
+ return PSCI_E_INVALID_PARAMS;
+ }
+
+ if (pstate == PSTATE_TYPE_STANDBY) {
+ req_state->pwr_domain_state[0] = PLAT_MAX_RET_STATE;
+ } else {
+ unsigned int i;
+ unsigned int pstate_id = psci_get_pstate_id(power_state);
+ plat_local_state_t s = MTK_LOCAL_STATE_OFF;
+
+ /* Use pstate_id to be power domain state */
+ if (pstate_id > s) {
+ s = (plat_local_state_t)pstate_id;
+ }
+
+ for (i = 0U; i <= aff_lvl; i++) {
+ req_state->pwr_domain_state[i] = s;
+ }
+ }
+
+ plat_power_state[cpu] = power_state;
+ return PSCI_E_SUCCESS;
+}
+
+static void plat_get_sys_suspend_power_state(psci_power_state_t *req_state)
+{
+ unsigned int lv;
+ unsigned int cpu = plat_my_core_pos();
+
+ for (lv = PSCI_CPU_PWR_LVL; lv <= PLAT_MAX_PWR_LVL; lv++) {
+ req_state->pwr_domain_state[lv] = PLAT_MAX_OFF_STATE;
+ }
+
+ plat_power_state[cpu] =
+ psci_make_powerstate(
+ MT_PLAT_PWR_STATE_SYSTEM_SUSPEND,
+ PSTATE_TYPE_POWERDOWN, PLAT_MAX_PWR_LVL);
+
+ flush_dcache_range((uintptr_t)
+ &plat_power_state[cpu],
+ sizeof(plat_power_state[cpu]));
+}
+
static const plat_psci_ops_t plat_psci_ops = {
+ .cpu_standby = plat_cpu_standby,
+ .pwr_domain_on = plat_power_domain_on,
+ .pwr_domain_on_finish = plat_power_domain_on_finish,
+ .pwr_domain_off = plat_power_domain_off,
+ .pwr_domain_suspend = plat_power_domain_suspend,
+ .pwr_domain_suspend_finish = plat_power_domain_suspend_finish,
+ .validate_power_state = plat_validate_power_state,
+ .get_sys_suspend_power_state = plat_get_sys_suspend_power_state
};
int plat_setup_psci_ops(uintptr_t sec_entrypoint,
const plat_psci_ops_t **psci_ops)
{
*psci_ops = &plat_psci_ops;
+ secure_entrypoint = sec_entrypoint;
+
+ /*
+ * init the warm reset config for boot CPU
+ * reset arch as AARCH64
+ * reset addr as function bl31_warm_entrypoint()
+ */
+ mcucfg_init_archstate(0U, 0U, true);
+ mcucfg_set_bootaddr(0U, 0U, secure_entrypoint);
+
+ spmc_init();
+ plat_mt_pm = mt_plat_cpu_pm_init();
return 0;
}