# Kconfig - ARM architecture configuration options # # Copyright (c) 2014-2015 Wind River Systems, Inc. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # 1) Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # # 2) Redistributions in binary form must reproduce the above copyright notice, # this list of conditions and the following disclaimer in the documentation # and/or other materials provided with the distribution. # # 3) Neither the name of Wind River Systems nor the names of its contributors # may be used to endorse or promote products derived from this software without # specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # source "kernel/Kconfig" source "misc/Kconfig" menu "ARM family options" config ARM bool default y help This option signifies the use of an ARM system. config XIP default n config ISA_THUMB2 bool "Thumb-2 Technology" default y 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. endmenu source "arch/arm/bsp/Kconfig" if BSP_TI_LM3S6965 source "arch/arm/ti_lm3s6965/Kconfig" endif if BSP_FSL_FRDM_K64F source "arch/arm/fsl_frdm_k64f/Kconfig" endif source "drivers/Kconfig" source "net/Kconfig"