arch: mach-k3: common: Add support to shutdown MCU R5 Core 1
During boot, ROM can bring up the MCU R5F cores in either lockstep or
split mode based on X509 certificate flags. If booted in split mode,
core 0 will run DM firmware and second core sits in WFI. Add support to
shut down core 1 so that other firmwares can later be loaded on them.
The shutdown of MCU R5 Core 1 is invoked at A72 SPL init, as by that
time Device Manager (DM) is up and running on R5 Core 0. The shutdown
request of Core 1 is handled by Device Manager itself.
Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index fc230f1..43ff114 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -31,6 +31,11 @@
#include <dm/uclass-internal.h>
#include <dm/device-internal.h>
+#define PROC_BOOT_CTRL_FLAG_R5_CORE_HALT 0x00000001
+#define PROC_BOOT_STATUS_FLAG_R5_WFI 0x00000002
+#define PROC_ID_MCU_R5FSS0_CORE1 0x02
+#define PROC_BOOT_CFG_FLAG_R5_LOCKSTEP 0x00000100
+
#include <asm/arch/k3-qos.h>
struct ti_sci_handle *get_ti_sci_handle(void)
@@ -328,3 +333,67 @@
writel(qos_data[i].val, (uintptr_t)qos_data[i].reg);
}
#endif
+
+int __maybe_unused shutdown_mcu_r5_core1(void)
+{
+ struct ti_sci_handle *ti_sci = get_ti_sci_handle();
+ struct ti_sci_dev_ops *dev_ops = &ti_sci->ops.dev_ops;
+ struct ti_sci_proc_ops *proc_ops = &ti_sci->ops.proc_ops;
+ u32 dev_id_mcu_r5_core1 = put_core_ids[0];
+ u64 boot_vector;
+ u32 cfg, ctrl, sts, halted;
+ int cluster_mode_lockstep, ret;
+ bool r_state = false, c_state = false;
+
+ ret = proc_ops->proc_request(ti_sci, PROC_ID_MCU_R5FSS0_CORE1);
+ if (ret) {
+ printf("Unable to request processor control for MCU1_1 core, %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = dev_ops->is_on(ti_sci, dev_id_mcu_r5_core1, &r_state, &c_state);
+ if (ret) {
+ printf("Unable to get device status for MCU1_1 core, %d\n", ret);
+ return ret;
+ }
+
+ ret = proc_ops->get_proc_boot_status(ti_sci, PROC_ID_MCU_R5FSS0_CORE1,
+ &boot_vector, &cfg, &ctrl, &sts);
+ if (ret) {
+ printf("Unable to get Processor boot status for MCU1_1 core, %d\n",
+ ret);
+ goto release_proc_ctrl;
+ }
+
+ halted = !!(sts & PROC_BOOT_STATUS_FLAG_R5_WFI);
+ cluster_mode_lockstep = !!(cfg & PROC_BOOT_CFG_FLAG_R5_LOCKSTEP);
+
+ /*
+ * Shutdown MCU R5F Core 1 only if:
+ * - cluster is booted in SplitMode
+ * - core is powered on
+ * - core is in WFI (halted)
+ */
+ if (cluster_mode_lockstep || !c_state || !halted) {
+ ret = -EINVAL;
+ goto release_proc_ctrl;
+ }
+
+ ret = proc_ops->set_proc_boot_ctrl(ti_sci, PROC_ID_MCU_R5FSS0_CORE1,
+ PROC_BOOT_CTRL_FLAG_R5_CORE_HALT, 0);
+ if (ret) {
+ printf("Unable to Halt MCU1_1 core, %d\n", ret);
+ goto release_proc_ctrl;
+ }
+
+ ret = dev_ops->put_device(ti_sci, dev_id_mcu_r5_core1);
+ if (ret) {
+ printf("Unable to assert reset on MCU1_1 core, %d\n", ret);
+ return ret;
+ }
+
+release_proc_ctrl:
+ proc_ops->proc_release(ti_sci, PROC_ID_MCU_R5FSS0_CORE1);
+ return ret;
+}
diff --git a/arch/arm/mach-k3/common.h b/arch/arm/mach-k3/common.h
index 02c7473..6e33f57 100644
--- a/arch/arm/mach-k3/common.h
+++ b/arch/arm/mach-k3/common.h
@@ -49,6 +49,7 @@
struct ti_sci_handle *get_ti_sci_handle(void);
void do_board_detect(void);
void ti_secure_image_check_binary(void **p_image, size_t *p_size);
+int shutdown_mcu_r5_core1(void);
#if (IS_ENABLED(CONFIG_K3_QOS))
void setup_qos(void);
diff --git a/arch/arm/mach-k3/j721e/j721e_init.c b/arch/arm/mach-k3/j721e/j721e_init.c
index f31c20f..edca263 100644
--- a/arch/arm/mach-k3/j721e/j721e_init.c
+++ b/arch/arm/mach-k3/j721e/j721e_init.c
@@ -296,9 +296,9 @@
void board_init_f(ulong dummy)
{
+ int ret;
#if defined(CONFIG_K3_J721E_DDRSS) || defined(CONFIG_K3_LOAD_SYSFW)
struct udevice *dev;
- int ret;
#endif
/*
* Cannot delay this further as there is a chance that
@@ -371,6 +371,13 @@
preloader_console_init();
#endif
+ /* Shutdown MCU_R5 Core 1 in Split mode at A72 SPL Stage */
+ if (IS_ENABLED(CONFIG_ARM64)) {
+ ret = shutdown_mcu_r5_core1();
+ if (ret)
+ printf("Unable to shutdown MCU R5 core 1, %d\n", ret);
+ }
+
/* Output System Firmware version info */
k3_sysfw_print_ver();
diff --git a/arch/arm/mach-k3/j721s2/j721s2_init.c b/arch/arm/mach-k3/j721s2/j721s2_init.c
index 5941fa2..6342161 100644
--- a/arch/arm/mach-k3/j721s2/j721s2_init.c
+++ b/arch/arm/mach-k3/j721s2/j721s2_init.c
@@ -230,6 +230,13 @@
remove_fwl_configs(navss_cbass0_fwls, ARRAY_SIZE(navss_cbass0_fwls));
}
+ /* Shutdown MCU_R5 Core 1 in Split mode at A72 SPL Stage */
+ if (IS_ENABLED(CONFIG_ARM64)) {
+ ret = shutdown_mcu_r5_core1();
+ if (ret)
+ printf("Unable to shutdown MCU R5 core 1, %d\n", ret);
+ }
+
/* Output System Firmware version info */
k3_sysfw_print_ver();
}
diff --git a/arch/arm/mach-k3/j784s4/j784s4_init.c b/arch/arm/mach-k3/j784s4/j784s4_init.c
index 787cf62..2756acc 100644
--- a/arch/arm/mach-k3/j784s4/j784s4_init.c
+++ b/arch/arm/mach-k3/j784s4/j784s4_init.c
@@ -206,6 +206,13 @@
writel(AUDIO_REFCLK1_DEFAULT, (uintptr_t)CTRL_MMR_CFG0_AUDIO_REFCLK1_CTRL);
+ /* Shutdown MCU_R5 Core 1 in Split mode at A72 SPL Stage */
+ if (IS_ENABLED(CONFIG_ARM64)) {
+ ret = shutdown_mcu_r5_core1();
+ if (ret)
+ printf("Unable to shutdown MCU R5 core 1, %d\n", ret);
+ }
+
/* Output System Firmware version info */
k3_sysfw_print_ver();
}