diff options
Diffstat (limited to 'arch/arm/mach-k3/am6_init.c')
| -rw-r--r-- | arch/arm/mach-k3/am6_init.c | 60 |
1 files changed, 58 insertions, 2 deletions
diff --git a/arch/arm/mach-k3/am6_init.c b/arch/arm/mach-k3/am6_init.c index cb96581bfbb..6558fe0ef4b 100644 --- a/arch/arm/mach-k3/am6_init.c +++ b/arch/arm/mach-k3/am6_init.c @@ -16,6 +16,7 @@ #include <dm.h> #include <dm/uclass-internal.h> #include <dm/pinctrl.h> +#include <linux/soc/ti/ti_sci_protocol.h> #ifdef CONFIG_SPL_BUILD static void mmr_unlock(u32 base, u32 partition) @@ -209,8 +210,63 @@ u32 spl_boot_device(void) } #endif -#ifndef CONFIG_SYSRESET -void reset_cpu(ulong ignored) +#ifdef CONFIG_SYS_K3_SPL_ATF + +#define AM6_DEV_MCU_RTI0 134 +#define AM6_DEV_MCU_RTI1 135 +#define AM6_DEV_MCU_ARMSS0_CPU0 159 +#define AM6_DEV_MCU_ARMSS0_CPU1 245 + +void release_resources_for_core_shutdown(void) { + struct udevice *dev; + struct ti_sci_handle *ti_sci; + struct ti_sci_dev_ops *dev_ops; + struct ti_sci_proc_ops *proc_ops; + int ret; + u32 i; + + const u32 put_device_ids[] = { + AM6_DEV_MCU_RTI0, + AM6_DEV_MCU_RTI1, + }; + + /* Get handle to Device Management and Security Controller (SYSFW) */ + ret = uclass_get_device_by_name(UCLASS_FIRMWARE, "dmsc", &dev); + if (ret) + panic("Failed to get handle to SYSFW (%d)\n", ret); + + ti_sci = (struct ti_sci_handle *)(ti_sci_get_handle_from_sysfw(dev)); + dev_ops = &ti_sci->ops.dev_ops; + proc_ops = &ti_sci->ops.proc_ops; + + /* Iterate through list of devices to put (shutdown) */ + for (i = 0; i < ARRAY_SIZE(put_device_ids); i++) { + u32 id = put_device_ids[i]; + + ret = dev_ops->put_device(ti_sci, id); + if (ret) + panic("Failed to put device %u (%d)\n", id, ret); + } + + const u32 put_core_ids[] = { + AM6_DEV_MCU_ARMSS0_CPU1, + AM6_DEV_MCU_ARMSS0_CPU0, /* Handle CPU0 after CPU1 */ + }; + + /* Iterate through list of cores to put (shutdown) */ + for (i = 0; i < ARRAY_SIZE(put_core_ids); i++) { + u32 id = put_core_ids[i]; + + /* + * Queue up the core shutdown request. Note that this call + * needs to be followed up by an actual invocation of an WFE + * or WFI CPU instruction. + */ + ret = proc_ops->proc_shutdown_no_wait(ti_sci, id); + if (ret) + panic("Failed sending core %u shutdown message (%d)\n", + id, ret); + } } #endif |