kernel/Kconfig.init

# Kernel init hook options

# Copyright (c) 2024 Intel Corporation
# SPDX-License-Identifier: Apache-2.0


menu "SoC and Board Hooks"

config SOC_EARLY_RESET_HOOK
	bool "Run SoC-specific early reset hook"
	help
	  Run a SoC-specific hook early in the reset/startup code (__start).
	  A custom hook soc_early_reset_hook() will be executed at the beginning
	  of the architecture-specific startup code, after hardware has been
	  configured (as required by CONFIG_INIT_ARCH_HW_AT_BOOT) but before
	  architecture's own resume logic.

	  Returning from this hook is not mandatory: it can be used to implement
	  special logic to resume execution in some scenarios (for example, when
	  a bootloader is used).

	  The stack pointer register should be considered as not initialized upon
	  call to this hook. In particular, this means that the hook is NOT allowed
	  to "push" any data using this stack pointer value. However, the hook may
	  use an implementation-specific area as stack if desired; in such case,
	  the original value of the stack pointer needs not to be "restored" before
	  returning control to the hook's caller.

	  Additional constraints may be imposed on the hook by the architecture.

config SOC_RESET_HOOK
	bool "Run SoC-specific reset hook"
	help
	  Run a SoC-specific hook in the reset/startup code (__start).

	  A custom hook soc_reset_hook() will be executed near the beginning
	  of the architecture-specific startup code, after hardware has been
	  configured (as required by CONFIG_INIT_ARCH_HW_AT_BOOT), a stack
	  pointer has been loaded and the architecture's own resume logic
	  has executed (if CONFIG_PM_S2RAM is enabled). Because this hook
	  runs after the resume logic, it is not called when the system
	  resumes from a suspend-to-RAM power state.

config SOC_PREP_HOOK
	bool "Run early SoC preparation hook"
	help
	  Run an early SoC preparation hook.

	  A custom hook soc_prep_hook() is executed at the beginning of the
	  c prep code (prep_c). soc_prep_hook() must be implemented by the SoC.

config SOC_EARLY_INIT_HOOK
	bool "Run early SoC hook"
	help
	  Run an early SoC initialization hook.

	  A custom SoC hook soc_early_init_hook() is executed before the kernel and
	  devices are initialized

config SOC_LATE_INIT_HOOK
	bool "Run late SoC hook"
	help
	  Run a late SoC initialization hook.

	  A custom SoC hook soc_late_init_hook() is executed after the kernel and
	  devices are initialized

config SOC_PER_CORE_INIT_HOOK
	bool "Run SoC per-core initialization hook"
	help
	  Run an SoC initialization hook for every core

	  A custom SoC hook soc_per_core_init_hook() is executeds at the end of
	  arch_kernel_init() for the primary core, and at the end of arch_secondary_cpu_init()
	  for secondary cores.

config BOARD_EARLY_INIT_HOOK
	bool "Run early board hook"
	help
	  Run an early board initialization hook.

	  A custom board hook board_early_init_hook() is executed before the kernel and
	  devices are initialized

config BOARD_LATE_INIT_HOOK
	bool "Run late board hook"
	help
	  Run a late board initialization hook.

	  A custom board hook board_late_init_hook() is executed after the kernel and
	  devices are initialized

endmenu