zephyr/arch/arm/Kconfig

# Kconfig - ARM architecture configuration options

#
# Copyright (c) 2014-2015 Wind River Systems, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#


menu "ARM architecture"
	depends on ARM

config ARCH
	default "arm"

config ARCH_DEFCONFIG
	string
	default "arch/arm/defconfig"

menu "General Platform Configuration"

choice
prompt "SoC Selection"
default SOC_FSL_FRDM_K64F
source "arch/arm/soc/*/Kconfig.soc"
endchoice

config IS_BOOTLOADER
	bool "Act as a bootloader"
	default n
	depends on XIP
	help
	This option indicates that Zephyr will act as a bootloader to execute
	a separate Zephyr image payload.

config BOOTLOADER_SRAM_SIZE
	int "SRAM reserved for when Zephyr acts as a bootloader"
	default 16
	depends on !XIP || IS_BOOTLOADER
	help
	This option specifies the amount of SRAM (measure in kB) reserved for
	when Zephyr is to act as a bootloader.

config ISA_THUMB2
	bool
	# Omit prompt to signify "hidden" option
	default n
	help
	From: http://www.arm.com/products/processors/technologies/instruction-set-architectures.php

	Thumb-2 technology is the instruction set underlying the ARM Cortex
	architecture which provides enhanced levels of performance, energy
	efficiency, and code density for a wide range of embedded
	applications.

	Thumb-2 technology builds on the success of Thumb, the innovative
	high code density instruction set for ARM microprocessor cores, to
	increase the power of the ARM microprocessor core available to
	developers of low cost, high performance systems.

	The technology is backwards compatible with existing ARM and Thumb
	solutions, while significantly extending the features available to
	the Thumb instructions set. This allows more of the application to
	benefit from the best in class code density of Thumb.

	For performance optimised code Thumb-2 technology uses 31 percent
	less memory to reduce system cost, while providing up to 38 percent
	higher performance than existing high density code, which can be used
	to prolong battery-life or to enrich the product feature set. Thumb-2
	technology is featured in the  processor, and in all ARMv7
	architecture-based processors.

source "arch/arm/core/Kconfig"

endmenu

source "arch/arm/soc/*/Kconfig"

endmenu