GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/plat/amlogic/gxbb/gxbb_pm.c

@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <assert.h>
+#include <common/debug.h>
+#include <drivers/arm/gicv2.h>
+#include <drivers/console.h>
+#include <errno.h>
+#include <lib/mmio.h>
+#include <lib/psci/psci.h>
+#include <plat/common/platform.h>
+#include <platform_def.h>
+
+#include "aml_private.h"
+
+#define SCPI_POWER_ON		0
+#define SCPI_POWER_RETENTION	1
+#define SCPI_POWER_OFF		3
+
+#define SCPI_SYSTEM_SHUTDOWN	0
+#define SCPI_SYSTEM_REBOOT	1
+
+static uintptr_t gxbb_sec_entrypoint;
+static volatile uint32_t gxbb_cpu0_go;
+
+static void gxbb_program_mailbox(u_register_t mpidr, uint64_t value)
+{
+	unsigned int core = plat_calc_core_pos(mpidr);
+	uintptr_t cpu_mailbox_addr = AML_PSCI_MAILBOX_BASE + (core << 4);
+
+	mmio_write_64(cpu_mailbox_addr, value);
+	flush_dcache_range(cpu_mailbox_addr, sizeof(uint64_t));
+}
+
+static void __dead2 gxbb_system_reset(void)
+{
+	INFO("BL31: PSCI_SYSTEM_RESET\n");
+
+	uint32_t status = mmio_read_32(AML_AO_RTI_STATUS_REG3);
+
+	NOTICE("BL31: Reboot reason: 0x%x\n", status);
+
+	status &= 0xFFFF0FF0;
+
+	console_flush();
+
+	mmio_write_32(AML_AO_RTI_STATUS_REG3, status);
+
+	int ret = aml_scpi_sys_power_state(SCPI_SYSTEM_REBOOT);
+
+	if (ret != 0) {
+		ERROR("BL31: PSCI_SYSTEM_RESET: SCP error: %u\n", ret);
+		panic();
+	}
+
+	wfi();
+
+	ERROR("BL31: PSCI_SYSTEM_RESET: Operation not handled\n");
+	panic();
+}
+
+static void __dead2 gxbb_system_off(void)
+{
+	INFO("BL31: PSCI_SYSTEM_OFF\n");
+
+	unsigned int ret = aml_scpi_sys_power_state(SCPI_SYSTEM_SHUTDOWN);
+
+	if (ret != 0) {
+		ERROR("BL31: PSCI_SYSTEM_OFF: SCP error %u\n", ret);
+		panic();
+	}
+
+	gxbb_program_mailbox(read_mpidr_el1(), 0);
+
+	wfi();
+
+	ERROR("BL31: PSCI_SYSTEM_OFF: Operation not handled\n");
+	panic();
+}
+
+static int32_t gxbb_pwr_domain_on(u_register_t mpidr)
+{
+	unsigned int core = plat_calc_core_pos(mpidr);
+
+	/* CPU0 can't be turned OFF, emulate it with a WFE loop */
+	if (core == AML_PRIMARY_CPU) {
+		VERBOSE("BL31: Releasing CPU0 from wait loop...\n");
+
+		gxbb_cpu0_go = 1;
+		flush_dcache_range((uintptr_t)&gxbb_cpu0_go, sizeof(gxbb_cpu0_go));
+		dsb();
+		isb();
+
+		sev();
+
+		return PSCI_E_SUCCESS;
+	}
+
+	gxbb_program_mailbox(mpidr, gxbb_sec_entrypoint);
+	aml_scpi_set_css_power_state(mpidr,
+				     SCPI_POWER_ON, SCPI_POWER_ON, SCPI_POWER_ON);
+	dmbsy();
+	sev();
+
+	return PSCI_E_SUCCESS;
+}
+
+static void gxbb_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+	unsigned int core = plat_calc_core_pos(read_mpidr_el1());
+
+	assert(target_state->pwr_domain_state[MPIDR_AFFLVL0] ==
+					PLAT_LOCAL_STATE_OFF);
+
+	if (core == AML_PRIMARY_CPU) {
+		gxbb_cpu0_go = 0;
+		flush_dcache_range((uintptr_t)&gxbb_cpu0_go, sizeof(gxbb_cpu0_go));
+		dsb();
+		isb();
+	}
+
+	gicv2_pcpu_distif_init();
+	gicv2_cpuif_enable();
+}
+
+static void gxbb_pwr_domain_off(const psci_power_state_t *target_state)
+{
+	u_register_t mpidr = read_mpidr_el1();
+	unsigned int core = plat_calc_core_pos(mpidr);
+	uintptr_t addr = AML_PSCI_MAILBOX_BASE + 8 + (core << 4);
+
+	mmio_write_32(addr, 0xFFFFFFFF);
+	flush_dcache_range(addr, sizeof(uint32_t));
+
+	gicv2_cpuif_disable();
+
+	/* CPU0 can't be turned OFF, emulate it with a WFE loop */
+	if (core == AML_PRIMARY_CPU)
+		return;
+
+	aml_scpi_set_css_power_state(mpidr,
+				     SCPI_POWER_OFF, SCPI_POWER_ON, SCPI_POWER_ON);
+}
+
+static void __dead2 gxbb_pwr_domain_pwr_down_wfi(const psci_power_state_t
+						 *target_state)
+{
+	unsigned int core = plat_calc_core_pos(read_mpidr_el1());
+
+	/* CPU0 can't be turned OFF, emulate it with a WFE loop */
+	if (core == AML_PRIMARY_CPU) {
+		VERBOSE("BL31: CPU0 entering wait loop...\n");
+
+		while (gxbb_cpu0_go == 0)
+			wfe();
+
+		VERBOSE("BL31: CPU0 resumed.\n");
+
+		write_rmr_el3(RMR_EL3_RR_BIT | RMR_EL3_AA64_BIT);
+	}
+
+	dsbsy();
+
+	for (;;)
+		wfi();
+}
+
+/*******************************************************************************
+ * Platform handlers and setup function.
+ ******************************************************************************/
+static const plat_psci_ops_t gxbb_ops = {
+	.pwr_domain_on			= gxbb_pwr_domain_on,
+	.pwr_domain_on_finish		= gxbb_pwr_domain_on_finish,
+	.pwr_domain_off			= gxbb_pwr_domain_off,
+	.pwr_domain_pwr_down_wfi	= gxbb_pwr_domain_pwr_down_wfi,
+	.system_off			= gxbb_system_off,
+	.system_reset			= gxbb_system_reset,
+};
+
+int plat_setup_psci_ops(uintptr_t sec_entrypoint,
+			const plat_psci_ops_t **psci_ops)
+{
+	gxbb_sec_entrypoint = sec_entrypoint;
+	*psci_ops = &gxbb_ops;
+	gxbb_cpu0_go = 0;
+	return 0;
+}