| # Kconfig - x86 general 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. |
| # |
| |
| config X86_32 |
| def_bool y |
| |
| config ARCH_DEFCONFIG |
| string |
| default "arch/x86/defconfig" |
| |
| source "kernel/Kconfig" |
| |
| source "misc/Kconfig" |
| |
| menu "General Platform Configuration" |
| |
| choice |
| prompt "Platform Selection" |
| default PLATFORM_IA32_PCI |
| |
| config PLATFORM_GALILEO |
| bool "Galileo Gen2" |
| select HPET_TIMER |
| select EOI_HANDLER_SUPPORTED |
| select BOOTLOADER_UNKNOWN |
| select PCI |
| help |
| The Intel® Galileo Gen 2 development board is a microcontroller board |
| based on the Intel® Quark™ SoC X1000 application processor, a 32-bit |
| Intel® Pentium® brand system on a chip (SoC). It is the first board |
| based on Intel® architecture designed to be hardware and software |
| pin-compatible with shields designed for the Arduino Uno* R3. |
| |
| config PLATFORM_IA32_PCI |
| bool "IA32 with PCI" |
| select HPET_TIMER |
| select EOI_HANDLER_SUPPORTED |
| select BOOTLOADER_UNKNOWN |
| select PCI |
| |
| config PLATFORM_IA32 |
| bool "IA32" |
| select EOI_HANDLER_SUPPORTED |
| select BOOTLOADER_UNKNOWN |
| |
| endchoice |
| |
| choice |
| prompt "Intel Processor" |
| default CPU_MINUTEIA |
| |
| config CPU_ATOM |
| bool "Atom" |
| select CMOV |
| help |
| This option signifies the use of a CPU from the Atom family. |
| |
| config CPU_MINUTEIA |
| bool "Minute IA" |
| select CPU_FLOAT_UNSUPPORTED |
| help |
| This option signifies the use of a CPU from the Minute IA family. |
| endchoice |
| |
| config CPU_MIGHT_SUPPORT_CLFLUSH |
| bool |
| default n |
| help |
| If a platform uses a processor that possibly implements CLFLUSH, change |
| the default in that platform's config file. |
| |
| #FIXME This option is not being used in the current code base. |
| config CLFLUSH_INSTRUCTION_SUPPORTED |
| bool |
| prompt "CLFLUSH instruction supported" if CPU_MIGHT_SUPPORT_CLFLUSH |
| depends on CPU_MIGHT_SUPPORT_CLFLUSH |
| default n |
| help |
| Only enable this if the CLFLUSH instruction is supported, so that |
| an implementation of _SysCacheFlush() that uses CLFLUSH is made |
| available, instead of the one using WBINVD. |
| |
| menu "Platform Capabilities" |
| config ADVANCED_IDLE_SUPPORTED |
| bool "Advanced Idle Supported" |
| default n |
| help |
| This option signifies that the target supports the ADVANCED_IDLE |
| configuration option. |
| |
| config BOI_HANDLER_SUPPORTED |
| bool "BOI Handler Supported" |
| default n |
| help |
| This option signifies that the target has one or more devices whose |
| driver utilizes a "beginning of interrupt" handler that gets called |
| before the standard interrupt handling code. This capability |
| can be used by the driver to suppress spurious interrupts generated |
| by the device (or for other purposes). |
| |
| config EOI_HANDLER_SUPPORTED |
| bool "EOI Handler Supported" |
| default n |
| help |
| This option signifies that the target has one or more devices whose |
| driver utilizes an "end of interrupt" handler that gets called |
| after the standard interrupt handling code. This capability |
| can be used by the driver to tell the device that an interrupt |
| has been handled (or for other purposes). |
| |
| config UNALIGNED_WRITE_UNSUPPORTED |
| bool "Unaligned Write Unsupported" |
| default n |
| help |
| This option signifies that the target may not properly decode the |
| IA-32 processor's byte enable (BE) lines, resulting in the inability |
| to read/write unaligned quantities. |
| |
| config LOCK_INSTRUCTION_UNSUPPORTED |
| bool "Lock Instruction Unsupported" |
| default n |
| help |
| This option signifies that the target lacks support for the IA-32 |
| LOCK prefix instruction. Code running on such targets cannot |
| use the LOCK prefix to perform read-modify-write operations in an |
| atomic manner; such targets must utilize other techniques to perform |
| atomic operations (such as locking interrupts). |
| |
| config NUM_DYNAMIC_STUBS |
| int "Number of dynamic int stubs" |
| default 0 |
| help |
| This option specifies the number of interrupt handlers that can be |
| installed dynamically using irq_connect(). |
| |
| config PIC_DISABLE |
| bool "Disable PIC" |
| default n |
| help |
| This option disables all interrupts on the PIC |
| |
| endmenu |
| |
| menu "Processor Capabilities" |
| |
| config ISA_IA32 |
| bool |
| default y |
| help |
| This option signifies the use of a CPU based on the Intel IA-32 |
| instruction set architecture. |
| |
| config IA32_LEGACY_IO_PORTS |
| bool |
| prompt "Support IA32 legacy IO ports" |
| default n |
| depends on ISA_IA32 |
| help |
| This option enables IA32 legacy IO ports. Note these are much slower |
| than memory access, so they should be used in last resort. |
| |
| config CMOV |
| def_bool n |
| help |
| This option signifies the use of an Intel CPU that supports |
| the CMOV instruction. |
| |
| config CPU_FLOAT_UNSUPPORTED |
| def_bool n |
| select CPU_SSE_UNSUPPORTED |
| help |
| This option signifies the use of an Intel CPU that lacks support |
| for floating point operations. |
| |
| config CPU_SSE_UNSUPPORTED |
| def_bool n |
| help |
| This option signifies the use of an Intel CPU that lacks support |
| for SSEx instructions (i.e. those which pre-date Pentium III). |
| |
| config CACHE_LINE_SIZE |
| int "Cache line size" |
| default 64 if CPU_ATOM |
| default 0 |
| help |
| Size in bytes of a CPU cache line. |
| |
| endmenu |
| |
| menu "Floating Point Options" |
| depends on !CPU_FLOAT_UNSUPPORTED |
| |
| config FLOAT |
| bool |
| prompt "Floating point instructions" |
| default n |
| select FP_SHARING if ENHANCED_SECURITY |
| help |
| This option enables the use of x87 FPU and MMX instructions by |
| a task or fiber. |
| |
| Disabling this option means that any task or fiber that uses a |
| floating point instruction will get a fatal exception. |
| |
| config FP_SHARING |
| bool |
| prompt "Floating point resource sharing" if !ENHANCED_SECURITY |
| depends on FLOAT |
| default n |
| select AUTOMATIC_FP_ENABLING if ENHANCED_SECURITY |
| help |
| This option allows multiple tasks and fibers to safely utilize |
| floating point hardware resources. Every task or fiber that wishes |
| to use floating point instructions (i.e. x87 FPU, MMX, or SSEx) must |
| be created with such support already enabled, or must enable this |
| support via task_float_enable() or fiber_float_enable() before |
| executing these instructions. |
| |
| Enabling this option adds 108 bytes to the stack size requirement |
| of each task or fiber that utilizes x87 FPU or MMX instructions, |
| and adds 464 bytes to the stack size requirement of each task or |
| fiber that utilizes SSEx instructions. (The stack size requirement |
| of tasks and fibers that do not utilize floating point instructions |
| remains unchanged.) |
| |
| Disabling this option means that only a single task or fiber may |
| utilize x87 FPU, MMX, or SSEx instructions. (The stack size |
| requirement of all tasks and fibers remains unchanged.) |
| |
| config AUTOMATIC_FP_ENABLING |
| bool |
| prompt "Automatically enable floating point resource sharing" \ |
| if !ENHANCED_SECURITY |
| depends on FP_SHARING |
| default n |
| help |
| This option allows tasks and fibers to safely utilize floating |
| point hardware resources without requiring them to first indicate |
| their intention to do so. The system automatically detects when |
| a task or fiber that does not currently have floating point support |
| enabled uses a floating point instruction, and automatically executes |
| task_float_enable() or fiber_float_enable() on its behalf. The |
| task or fiber is enabled for using x87 FPU, MMX, or SSEx instructions |
| if SSE is configured, otherwise it is enabled for using x87 FPU or |
| MMX instructions only. |
| |
| config SSE |
| bool |
| prompt "SSEx instructions" |
| depends on FLOAT && !CPU_SSE_UNSUPPORTED |
| default n |
| help |
| This option enables the use of SSEx instructions by a task or fiber. |
| |
| Disabling this option means that no task or fiber may use SSEx |
| instructions; any such use will result in undefined behavior. |
| |
| config SSE_FP_MATH |
| bool |
| prompt "Compiler-generated SSEx instructions" if FP_SHARING |
| depends on SSE |
| default n if FP_SHARING |
| default y if !FP_SHARING |
| help |
| This option allows the compiler to generate SSEx instructions for |
| performing floating point math. This can greatly improve performance |
| when exactly the same operations are to be performed on multiple |
| data objects; however, it can also significantly reduce performance |
| when pre-emptive task switches occur because of the larger register |
| set that must be saved and restored. |
| |
| Disabling this option means that the compiler utilizes only the |
| x87 instruction set for floating point operations. |
| |
| config XIP |
| default n |
| |
| endmenu |
| |
| |
| source "arch/x86/core/Kconfig" |
| |
| endmenu |
| |
| if PLATFORM_IA32 |
| source "arch/x86/platforms/ia32/Kconfig" |
| endif |
| |
| if PLATFORM_IA32_PCI |
| source "arch/x86/platforms/ia32_pci/Kconfig" |
| endif |
| |
| if PLATFORM_GALILEO |
| source "arch/x86/platforms/galileo/Kconfig" |
| endif |
| |
| source "drivers/Kconfig" |
| |
| source "net/Kconfig" |
