feat(plat/mediatek/mt8186): add CPU hotplug
Implement PSCI platform operations to support CPU hotplug and MCDI.
TEST=bringup 8 CPUs successfully on kernel stage.
BUG=b:202871018
Change-Id: Ibd5423b70b3ca3f91edaa48d7ca5bc094e751510
diff --git a/plat/mediatek/mt8186/drivers/spmc/mtspmc.c b/plat/mediatek/mt8186/drivers/spmc/mtspmc.c
new file mode 100644
index 0000000..91ef096
--- /dev/null
+++ b/plat/mediatek/mt8186/drivers/spmc/mtspmc.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2021, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+
+#include <mcucfg.h>
+#include <mtspmc.h>
+#include <mtspmc_private.h>
+#include <plat/common/platform.h>
+
+void mcucfg_disable_gic_wakeup(unsigned int cluster, unsigned int cpu)
+{
+ mmio_setbits_32(MCUCFG_CPC_FLOW_CTRL_CFG, GIC_WAKEUP_IGNORE(cpu));
+}
+
+void mcucfg_enable_gic_wakeup(unsigned int cluster, unsigned int cpu)
+{
+ mmio_clrbits_32(MCUCFG_CPC_FLOW_CTRL_CFG, GIC_WAKEUP_IGNORE(cpu));
+ /* Clear cpu's cpc sw hint */
+ mmio_write_32(CPC_MCUSYS_CPU_ON_SW_HINT_CLR, BIT(cpu));
+}
+
+void mcucfg_set_bootaddr(unsigned int cluster, unsigned int cpu, uintptr_t bootaddr)
+{
+ assert(cluster == 0U);
+
+ mmio_write_32(per_cpu(cluster, cpu, MCUCFG_BOOTADDR), bootaddr);
+}
+
+uintptr_t mcucfg_get_bootaddr(unsigned int cluster, unsigned int cpu)
+{
+ assert(cluster == 0U);
+
+ return (uintptr_t)mmio_read_32(per_cpu(cluster, cpu, MCUCFG_BOOTADDR));
+}
+
+void mcucfg_init_archstate(unsigned int cluster, unsigned int cpu, bool arm64)
+{
+ uint32_t reg;
+
+ assert(cluster == 0U);
+
+ reg = per_cluster(cluster, MCUCFG_INITARCH);
+
+ if (arm64) {
+ mmio_setbits_32(reg, MCUCFG_INITARCH_CPU_BIT(cpu));
+ } else {
+ mmio_clrbits_32(reg, MCUCFG_INITARCH_CPU_BIT(cpu));
+ }
+}
+
+/*
+ * Return subsystem's power state.
+ *
+ * @mask: mask to SPM_CPU_PWR_STATUS to query the power state
+ * of one subsystem.
+ * RETURNS:
+ * 0 (the subsys was powered off)
+ * 1 (the subsys was powered on)
+ */
+bool spm_get_powerstate(uint32_t mask)
+{
+ return (mmio_read_32(SPM_CPU_PWR_STATUS) & mask);
+}
+
+bool spm_get_cluster_powerstate(unsigned int cluster)
+{
+ assert(cluster == 0U);
+
+ return spm_get_powerstate(MP0_CPUTOP);
+}
+
+bool spm_get_cpu_powerstate(unsigned int cluster, unsigned int cpu)
+{
+ uint32_t mask = BIT(cpu);
+
+ assert(cluster == 0U);
+
+ return spm_get_powerstate(mask);
+}
+
+int spmc_init(void)
+{
+ unsigned int cpu = plat_my_core_pos();
+
+
+ INFO("SPM: enable CPC mode\n");
+
+ mmio_write_32(SPM_POWERON_CONFIG_EN, PROJECT_CODE | BCLK_CG_EN);
+
+ mmio_setbits_32(per_cpu(0, 1, SPM_CPU_PWR), PWR_RST_B);
+ mmio_setbits_32(per_cpu(0, 2, SPM_CPU_PWR), PWR_RST_B);
+ mmio_setbits_32(per_cpu(0, 3, SPM_CPU_PWR), PWR_RST_B);
+ mmio_setbits_32(per_cpu(0, 4, SPM_CPU_PWR), PWR_RST_B);
+ mmio_setbits_32(per_cpu(0, 5, SPM_CPU_PWR), PWR_RST_B);
+ mmio_setbits_32(per_cpu(0, 6, SPM_CPU_PWR), PWR_RST_B);
+ mmio_setbits_32(per_cpu(0, 7, SPM_CPU_PWR), PWR_RST_B);
+
+ mmio_clrbits_32(SPM_MCUSYS_PWR_CON, RESETPWRON_CONFIG);
+ mmio_clrbits_32(SPM_MP0_CPUTOP_PWR_CON, RESETPWRON_CONFIG);
+ mmio_clrbits_32(per_cpu(0, 0, SPM_CPU_PWR), RESETPWRON_CONFIG);
+
+ mmio_setbits_32(MCUCFG_CPC_FLOW_CTRL_CFG, CPC_CTRL_ENABLE);
+
+ /* Clear bootup cpu's cpc sw hint */
+ mmio_write_32(CPC_MCUSYS_CPU_ON_SW_HINT_CLR, BIT(cpu));
+
+ return 0;
+}
+
+/*
+ * Power on a core with specified cluster and core index
+ *
+ * @cluster: the cluster ID of the CPU which to be powered on
+ * @cpu: the CPU ID of the CPU which to be powered on
+ */
+void spm_poweron_cpu(unsigned int cluster, unsigned int cpu)
+{
+ /* info CPC that CPU hotplug on */
+ mmio_setbits_32(MCUCFG_CPC_FLOW_CTRL_CFG, SSPM_ALL_PWR_CTRL_EN);
+
+ /* Set mp0_spmc_pwr_on_cpuX = 1 */
+ mmio_setbits_32(per_cpu(cluster, cpu, SPM_CPU_PWR), PWR_ON);
+
+ /* wait for power on ack */
+ while (!spm_get_cpu_powerstate(cluster, cpu))
+ ;
+
+ /* info CPC that CPU hotplug off */
+ mmio_clrbits_32(MCUCFG_CPC_FLOW_CTRL_CFG, SSPM_ALL_PWR_CTRL_EN);
+}
+
+/*
+ * Power off a core with specified cluster and core index
+ *
+ * @cluster: the cluster ID of the CPU which to be powered off
+ * @cpu: the CPU ID of the CPU which to be powered off
+ */
+void spm_poweroff_cpu(unsigned int cluster, unsigned int cpu)
+{
+ /* Set mp0_spmc_pwr_on_cpuX = 0 */
+ mmio_clrbits_32(per_cpu(cluster, cpu, SPM_CPU_PWR), PWR_ON);
+}
+
+/*
+ * Power off a cluster with specified index
+ *
+ * @cluster: the cluster index which to be powered off
+ */
+void spm_poweroff_cluster(unsigned int cluster)
+{
+ /* No need to power on/off cluster on single cluster platform */
+ assert(false);
+}
+
+/*
+ * Power on a cluster with specified index
+ *
+ * @cluster: the cluster index which to be powered on
+ */
+void spm_poweron_cluster(unsigned int cluster)
+{
+ /* No need to power on/off cluster on single cluster platform */
+ assert(false);
+}