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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 | # Kconfig - miscellany configuration options # # Copyright (c) 2014-2015 Wind River Systems, Inc. # # SPDX-License-Identifier: Apache-2.0 # menu "Compile and Link Features" menu "Linker Options" config HAS_FLASH_LOAD_OFFSET bool help This option is selected by targets having a FLASH_LOAD_OFFSET and FLASH_LOAD_SIZE. if !HAS_DTS config FLASH_LOAD_OFFSET hex "Kernel load offset" default 0 depends on HAS_FLASH_LOAD_OFFSET help This option specifies the byte offset from the beginning of flash that the kernel should be loaded into. Changing this value from zero will affect the Zephyr image's link, and will decrease the total amount of flash available for use by application code. If unsure, leave at the default value 0. config FLASH_LOAD_SIZE hex "Kernel load size" default 0 depends on HAS_FLASH_LOAD_OFFSET help If non-zero, this option specifies the size, in bytes, of the flash area that the Zephyr image will be allowed to occupy. If zero, the image will be able to occupy from the FLASH_LOAD_OFFSET to the end of the device. If unsure, leave at the default value 0. endif config TEXT_SECTION_OFFSET hex "TEXT section offset" default 0 help This sets and offset before the text section and allows booting images with custom headers that are inserted at the beginning of the image. config HAVE_CUSTOM_LINKER_SCRIPT prompt "Custom linker scripts provided" def_bool n help Set this option if you have a custom linker script which needed to be define in CUSTOM_LINKER_SCRIPT. config CUSTOM_LINKER_SCRIPT string "Path to custom linker script" default "" depends on HAVE_CUSTOM_LINKER_SCRIPT help Path to the linker script to be used instead of the one define by the board. The linker script must be based on a version provided by Zephyr since the kernel can expect a certain layout/certain regions. This is useful when an application needs to add sections into the linker script and avoid having to change the script provided by Zephyr. config CUSTOM_RODATA_LD bool "Include custom-rodata.ld" default n help Include a customized linker script fragment for inserting additional data and linker directives into the rodata section. config CUSTOM_RWDATA_LD bool "Include custom-rwdata.ld" default n help Include a customized linker script fragment for inserting additional data and linker directives into the data section. config CUSTOM_SECTIONS_LD bool "Include custom-sections.ld" default n help Include a customized linker script fragment for inserting additional arbitrary sections. config LINK_WHOLE_ARCHIVE bool "Allow linking with --whole-archive" default n help This options allows linking external libraries with the --whole-archive option to keep all symbols. endmenu menu "Compiler Options" config CROSS_COMPILE string "Cross-compiler tool prefix" help Same as running 'make CROSS_COMPILE=prefix-' but stored for default make runs in this kernel build directory. You don't need to set this unless you want the configured kernel build directory to select the cross-compiler automatically. config COMPILER_OPT string prompt "Custom compiler options" default "" help This option is a free-form string that is passed to the compiler when building all parts of a project (i.e. kernel). The compiler options specified by this string supplement the predefined set of compiler supplied by the build system, and can be used to change compiler optimization, warning and error messages, and so on. config TOOLCHAIN_VARIANT string "Cross-compiler variant name" help For optimized compilers with reduced features, specify the name of the variant. endmenu config GDB_INFO bool prompt "Task-aware debugging with GDB" default n help This option enables the kernel to collect additional information during interrupts, exceptions, and context switches. This information is required for task-aware debugging with GDB. config KERNEL_BIN_NAME string "The kernel binary name" default "zephyr" help This option sets the name of the generated kernel binary. endmenu menu "System Monitoring Options" config PERFORMANCE_METRICS bool prompt "Enable performance metrics [EXPERIMENTAL]" default n help Enable Performance Metrics. config BOOT_TIME_MEASUREMENT bool prompt "Boot time measurements [EXPERIMENTAL]" default n depends on PERFORMANCE_METRICS help This option enables the recording of timestamps during system start up. The global variable __start_time_stamp records the time kernel begins executing, while __main_time_stamp records when main() begins executing, and __idle_time_stamp records when the CPU becomes idle. All values are recorded in terms of CPU clock cycles since system reset. config CPU_CLOCK_FREQ_MHZ int prompt "CPU Clock Frequency in MHz" default 20 depends on BOOT_TIME_MEASUREMENT help This option specifies the CPU Clock Frequency in MHz in order to convert Intel RDTSC timestamp to microseconds. endmenu menu "Boot Options" config IS_BOOTLOADER bool "Act as a bootloader" default n depends on XIP depends on ARM 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 depends on ARM help This option specifies the amount of SRAM (measure in kB) reserved for when Zephyr is to act as a bootloader. config BOOTLOADER_KEXEC bool prompt "Boot using Linux kexec() system call" depends on X86 default n help This option signifies that Linux boots the kernel using kexec system call and utility. This method is used to boot the kernel over the network. config BOOTLOADER_UNKNOWN bool prompt "Generic boot loader support" default n depends on X86 help This option signifies that the target has a generic bootloader or that it supports multiple ways of booting and it isn't clear at build time which method is to be used. When this option is enabled the board may have to do extra work to ensure a proper startup. config BOOTLOADER_CONTEXT_RESTORE bool prompt "Boot loader has context restore support" default y depends on SYS_POWER_DEEP_SLEEP && BOOTLOADER_CONTEXT_RESTORE_SUPPORTED help This option signifies that the target has a bootloader that restores CPU context upon resuming from deep sleep power state. config REBOOT bool "Reboot functionality" default n select SYSTEM_CLOCK_DISABLE help Enable the sys_reboot() API. Enabling this can drag in other subsystems needed to perform a "safe" reboot (e.g. SYSTEM_CLOCK_DISABLE, to stop the system clock before issuing a reset). endmenu |