amlogic: axg: Add support for the A113D (AXG) platform
Introduce the preliminary support for the Amlogic A113D (AXG) SoC.
This port is a minimal implementation of BL31 capable of booting
mainline U-Boot, Linux and chainloading BL32 (ATOS).
Tested on a A113D board.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Ic4548fa2f7c48d61b485b2a6517ec36c53c20809
diff --git a/plat/amlogic/axg/axg_pm.c b/plat/amlogic/axg/axg_pm.c
new file mode 100644
index 0000000..e67f263
--- /dev/null
+++ b/plat/amlogic/axg/axg_pm.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2020, 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 axg_sec_entrypoint;
+
+static void axg_pm_set_reset_addr(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);
+}
+
+static void axg_pm_reset(u_register_t mpidr, uint32_t value)
+{
+ unsigned int core = plat_calc_core_pos(mpidr);
+ uintptr_t cpu_mailbox_addr = AML_PSCI_MAILBOX_BASE + (core << 4) + 8;
+
+ mmio_write_32(cpu_mailbox_addr, value);
+}
+
+static void __dead2 axg_system_reset(void)
+{
+ u_register_t mpidr = read_mpidr_el1();
+ int ret;
+
+ INFO("BL31: PSCI_SYSTEM_RESET\n");
+
+ ret = aml_scpi_sys_power_state(SCPI_SYSTEM_REBOOT);
+ if (ret != 0) {
+ ERROR("BL31: PSCI_SYSTEM_RESET: SCP error: %i\n", ret);
+ panic();
+ }
+
+ axg_pm_reset(mpidr, 0);
+
+ wfi();
+
+ ERROR("BL31: PSCI_SYSTEM_RESET: Operation not handled\n");
+ panic();
+}
+
+static void __dead2 axg_system_off(void)
+{
+ u_register_t mpidr = read_mpidr_el1();
+ int ret;
+
+ INFO("BL31: PSCI_SYSTEM_OFF\n");
+
+ ret = aml_scpi_sys_power_state(SCPI_SYSTEM_SHUTDOWN);
+ if (ret != 0) {
+ ERROR("BL31: PSCI_SYSTEM_OFF: SCP error %i\n", ret);
+ panic();
+ }
+
+ axg_pm_set_reset_addr(mpidr, 0);
+ axg_pm_reset(mpidr, 0);
+
+ dmbsy();
+ wfi();
+
+ ERROR("BL31: PSCI_SYSTEM_OFF: Operation not handled\n");
+ panic();
+}
+
+static int32_t axg_pwr_domain_on(u_register_t mpidr)
+{
+ axg_pm_set_reset_addr(mpidr, axg_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 axg_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+ assert(target_state->pwr_domain_state[MPIDR_AFFLVL0] ==
+ PLAT_LOCAL_STATE_OFF);
+
+ gicv2_pcpu_distif_init();
+ gicv2_cpuif_enable();
+
+ axg_pm_set_reset_addr(read_mpidr_el1(), 0);
+}
+
+static void axg_pwr_domain_off(const psci_power_state_t *target_state)
+{
+ u_register_t mpidr = read_mpidr_el1();
+ uint32_t system_state = SCPI_POWER_ON;
+ uint32_t cluster_state = SCPI_POWER_ON;
+
+ assert(target_state->pwr_domain_state[MPIDR_AFFLVL0] ==
+ PLAT_LOCAL_STATE_OFF);
+
+ axg_pm_reset(mpidr, -1);
+
+ gicv2_cpuif_disable();
+
+ if (target_state->pwr_domain_state[MPIDR_AFFLVL2] ==
+ PLAT_LOCAL_STATE_OFF)
+ system_state = SCPI_POWER_OFF;
+
+ if (target_state->pwr_domain_state[MPIDR_AFFLVL1] ==
+ PLAT_LOCAL_STATE_OFF)
+ cluster_state = SCPI_POWER_OFF;
+
+
+ aml_scpi_set_css_power_state(mpidr,
+ SCPI_POWER_OFF, cluster_state,
+ system_state);
+}
+
+static void __dead2 axg_pwr_domain_pwr_down_wfi(const psci_power_state_t
+ *target_state)
+{
+ dsbsy();
+ axg_pm_reset(read_mpidr_el1(), 0);
+
+ for (;;)
+ wfi();
+}
+
+/*******************************************************************************
+ * Platform handlers and setup function.
+ ******************************************************************************/
+static const plat_psci_ops_t axg_ops = {
+ .pwr_domain_on = axg_pwr_domain_on,
+ .pwr_domain_on_finish = axg_pwr_domain_on_finish,
+ .pwr_domain_off = axg_pwr_domain_off,
+ .pwr_domain_pwr_down_wfi = axg_pwr_domain_pwr_down_wfi,
+ .system_off = axg_system_off,
+ .system_reset = axg_system_reset
+};
+
+int plat_setup_psci_ops(uintptr_t sec_entrypoint,
+ const plat_psci_ops_t **psci_ops)
+{
+ axg_sec_entrypoint = sec_entrypoint;
+ *psci_ops = &axg_ops;
+ return 0;
+}