1menu "Boot timing" 2 3config BOOTSTAGE 4 bool "Boot timing and reporting" 5 help 6 Enable recording of boot time while booting. To use it, insert 7 calls to bootstage_mark() with a suitable BOOTSTAGE_ID from 8 bootstage.h. Only a single entry is recorded for each ID. You can 9 give the entry a name with bootstage_mark_name(). You can also 10 record elapsed time in a particular stage using bootstage_start() 11 before starting and bootstage_accum() when finished. Bootstage will 12 add up all the accumulated time and report it. 13 14 Normally, IDs are defined in bootstage.h but a small number of 15 additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC 16 as the ID. 17 18 Calls to show_boot_progress() will also result in log entries but 19 these will not have names. 20 21config BOOTSTAGE_REPORT 22 bool "Display a detailed boot timing report before booting the OS" 23 depends on BOOTSTAGE 24 help 25 Enable output of a boot time report just before the OS is booted. 26 This shows how long it took U-Boot to go through each stage of the 27 boot process. The report looks something like this: 28 29 Timer summary in microseconds: 30 Mark Elapsed Stage 31 0 0 reset 32 3,575,678 3,575,678 board_init_f start 33 3,575,695 17 arch_cpu_init A9 34 3,575,777 82 arch_cpu_init done 35 3,659,598 83,821 board_init_r start 36 3,910,375 250,777 main_loop 37 29,916,167 26,005,792 bootm_start 38 30,361,327 445,160 start_kernel 39 40config BOOTSTAGE_USER_COUNT 41 hex "Number of boot ID numbers available for user use" 42 default 20 43 help 44 This is the number of available user bootstage records. 45 Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 46 a new ID will be allocated from this stash. If you exceed 47 the limit, recording will stop. 48 49config BOOTSTAGE_FDT 50 bool "Store boot timing information in the OS device tree" 51 depends on BOOTSTAGE 52 help 53 Stash the bootstage information in the FDT. A root 'bootstage' 54 node is created with each bootstage id as a child. Each child 55 has a 'name' property and either 'mark' containing the 56 mark time in microseconds, or 'accum' containing the 57 accumulated time for that bootstage id in microseconds. 58 For example: 59 60 bootstage { 61 154 { 62 name = "board_init_f"; 63 mark = <3575678>; 64 }; 65 170 { 66 name = "lcd"; 67 accum = <33482>; 68 }; 69 }; 70 71 Code in the Linux kernel can find this in /proc/devicetree. 72 73config BOOTSTAGE_STASH 74 bool "Stash the boot timing information in memory before booting OS" 75 depends on BOOTSTAGE 76 help 77 Some OSes do not support device tree. Bootstage can instead write 78 the boot timing information in a binary format at a given address. 79 This happens through a call to bootstage_stash(), typically in 80 the CPU's cleanup_before_linux() function. You can use the 81 'bootstage stash' and 'bootstage unstash' commands to do this on 82 the command line. 83 84config BOOTSTAGE_STASH_ADDR 85 hex "Address to stash boot timing information" 86 default 0 87 help 88 Provide an address which will not be overwritten by the OS when it 89 starts, so that it can read this information when ready. 90 91config BOOTSTAGE_STASH_SIZE 92 hex "Size of boot timing stash region" 93 default 4096 94 help 95 This should be large enough to hold the bootstage stash. A value of 96 4096 (4KiB) is normally plenty. 97 98endmenu 99 100menu "Boot media" 101 102config NOR_BOOT 103 bool "Support for booting from NOR flash" 104 depends on NOR 105 help 106 Enabling this will make a U-Boot binary that is capable of being 107 booted via NOR. In this case we will enable certain pinmux early 108 as the ROM only partially sets up pinmux. We also default to using 109 NOR for environment. 110 111config NAND_BOOT 112 bool "Support for booting from NAND flash" 113 default n 114 help 115 Enabling this will make a U-Boot binary that is capable of being 116 booted via NAND flash. This is not a must, some SoCs need this, 117 some not. 118 119config ONENAND_BOOT 120 bool "Support for booting from ONENAND" 121 default n 122 help 123 Enabling this will make a U-Boot binary that is capable of being 124 booted via ONENAND. This is not a must, some SoCs need this, 125 some not. 126 127config QSPI_BOOT 128 bool "Support for booting from QSPI flash" 129 default n 130 help 131 Enabling this will make a U-Boot binary that is capable of being 132 booted via QSPI flash. This is not a must, some SoCs need this, 133 some not. 134 135config SATA_BOOT 136 bool "Support for booting from SATA" 137 default n 138 help 139 Enabling this will make a U-Boot binary that is capable of being 140 booted via SATA. This is not a must, some SoCs need this, 141 some not. 142 143config SD_BOOT 144 bool "Support for booting from SD/EMMC" 145 default n 146 help 147 Enabling this will make a U-Boot binary that is capable of being 148 booted via SD/EMMC. This is not a must, some SoCs need this, 149 some not. 150 151config SPI_BOOT 152 bool "Support for booting from SPI flash" 153 default n 154 help 155 Enabling this will make a U-Boot binary that is capable of being 156 booted via SPI flash. This is not a must, some SoCs need this, 157 some not. 158 159endmenu 160 161config BOOTDELAY 162 int "delay in seconds before automatically booting" 163 default 2 164 depends on AUTOBOOT 165 help 166 Delay before automatically running bootcmd; 167 set to 0 to autoboot with no delay, but you can stop it by key input. 168 set to -1 to disable autoboot. 169 set to -2 to autoboot with no delay and not check for abort 170 171 See doc/README.autoboot for details. 172 173menu "Console" 174 175config MENU 176 bool 177 help 178 This is the library functionality to provide a text-based menu of 179 choices for the user to make choices with. 180 181config CONSOLE_RECORD 182 bool "Console recording" 183 help 184 This provides a way to record console output (and provide console 185 input) through circular buffers. This is mostly useful for testing. 186 Console output is recorded even when the console is silent. 187 To enable console recording, call console_record_reset_enable() 188 from your code. 189 190config CONSOLE_RECORD_OUT_SIZE 191 hex "Output buffer size" 192 depends on CONSOLE_RECORD 193 default 0x400 if CONSOLE_RECORD 194 help 195 Set the size of the console output buffer. When this fills up, no 196 more data will be recorded until some is removed. The buffer is 197 allocated immediately after the malloc() region is ready. 198 199config CONSOLE_RECORD_IN_SIZE 200 hex "Input buffer size" 201 depends on CONSOLE_RECORD 202 default 0x100 if CONSOLE_RECORD 203 help 204 Set the size of the console input buffer. When this contains data, 205 tstc() and getc() will use this in preference to real device input. 206 The buffer is allocated immediately after the malloc() region is 207 ready. 208 209config IDENT_STRING 210 string "Board specific string to be added to uboot version string" 211 help 212 This options adds the board specific name to u-boot version. 213 214config SILENT_CONSOLE 215 bool "Support a silent console" 216 help 217 This option allows the console to be silenced, meaning that no 218 output will appear on the console devices. This is controlled by 219 setting the environment vaariable 'silent' to a non-empty value. 220 Note this also silences the console when booting Linux. 221 222 When the console is set up, the variable is checked, and the 223 GD_FLG_SILENT flag is set. Changing the environment variable later 224 will update the flag. 225 226config SILENT_U_BOOT_ONLY 227 bool "Only silence the U-Boot console" 228 depends on SILENT_CONSOLE 229 help 230 Normally when the U-Boot console is silenced, Linux's console is 231 also silenced (assuming the board boots into Linux). This option 232 allows the linux console to operate normally, even if U-Boot's 233 is silenced. 234 235config SILENT_CONSOLE_UPDATE_ON_SET 236 bool "Changes to the 'silent' environment variable update immediately" 237 depends on SILENT_CONSOLE 238 default y if SILENT_CONSOLE 239 help 240 When the 'silent' environment variable is changed, update the 241 console silence flag immediately. This allows 'setenv' to be used 242 to silence or un-silence the console. 243 244 The effect is that any change to the variable will affect the 245 GD_FLG_SILENT flag. 246 247config SILENT_CONSOLE_UPDATE_ON_RELOC 248 bool "Allow flags to take effect on relocation" 249 depends on SILENT_CONSOLE 250 help 251 In some cases the environment is not available until relocation 252 (e.g. NAND). This option makes the value of the 'silent' 253 environment variable take effect at relocation. 254 255config PRE_CONSOLE_BUFFER 256 bool "Buffer characters before the console is available" 257 help 258 Prior to the console being initialised (i.e. serial UART 259 initialised etc) all console output is silently discarded. 260 Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 261 buffer any console messages prior to the console being 262 initialised to a buffer. The buffer is a circular buffer, so 263 if it overflows, earlier output is discarded. 264 265 Note that this is not currently supported in SPL. It would be 266 useful to be able to share the pre-console buffer with SPL. 267 268config PRE_CON_BUF_SZ 269 int "Sets the size of the pre-console buffer" 270 depends on PRE_CONSOLE_BUFFER 271 default 4096 272 help 273 The size of the pre-console buffer affects how much console output 274 can be held before it overflows and starts discarding earlier 275 output. Normally there is very little output at this early stage, 276 unless debugging is enabled, so allow enough for ~10 lines of 277 text. 278 279 This is a useful feature if you are using a video console and 280 want to see the full boot output on the console. Without this 281 option only the post-relocation output will be displayed. 282 283config PRE_CON_BUF_ADDR 284 hex "Address of the pre-console buffer" 285 depends on PRE_CONSOLE_BUFFER 286 default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I 287 default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I 288 help 289 This sets the start address of the pre-console buffer. This must 290 be in available memory and is accessed before relocation and 291 possibly before DRAM is set up. Therefore choose an address 292 carefully. 293 294 We should consider removing this option and allocating the memory 295 in board_init_f_init_reserve() instead. 296 297config CONSOLE_MUX 298 bool "Enable console multiplexing" 299 default y if DM_VIDEO || VIDEO || LCD 300 help 301 This allows multiple devices to be used for each console 'file'. 302 For example, stdout can be set to go to serial and video. 303 Similarly, stdin can be set to come from serial and keyboard. 304 Input can be provided from either source. Console multiplexing 305 adds a small amount of size to U-Boot. Changes to the environment 306 variables stdout, stdin and stderr will take effect immediately. 307 308config SYS_CONSOLE_IS_IN_ENV 309 bool "Select console devices from the environment" 310 default y if CONSOLE_MUX 311 help 312 This allows multiple input/output devices to be set at boot time. 313 For example, if stdout is set to "serial,video" then output will 314 be sent to both the serial and video devices on boot. The 315 environment variables can be updated after boot to change the 316 input/output devices. 317 318config SYS_CONSOLE_OVERWRITE_ROUTINE 319 bool "Allow board control over console overwriting" 320 help 321 If this is enabled, and the board-specific function 322 overwrite_console() returns 1, the stdin, stderr and stdout are 323 switched to the serial port, else the settings in the environment 324 are used. If this is not enabled, the console will not be switched 325 to serial. 326 327config SYS_CONSOLE_ENV_OVERWRITE 328 bool "Update environment variables during console init" 329 help 330 The console environment variables (stdout, stdin, stderr) can be 331 used to determine the correct console devices on start-up. This 332 option writes the console devices to these variables on console 333 start-up (after relocation). This causes the environment to be 334 updated to match the console devices actually chosen. 335 336config SYS_CONSOLE_INFO_QUIET 337 bool "Don't display the console devices on boot" 338 help 339 Normally U-Boot displays the current settings for stdout, stdin 340 and stderr on boot when the post-relocation console is set up. 341 Enable this option to supress this output. It can be obtained by 342 calling stdio_print_current_devices() from board code. 343 344config SYS_STDIO_DEREGISTER 345 bool "Allow deregistering stdio devices" 346 default y if USB_KEYBOARD 347 help 348 Generally there is no need to deregister stdio devices since they 349 are never deactivated. But if a stdio device is used which can be 350 removed (for example a USB keyboard) then this option can be 351 enabled to ensure this is handled correctly. 352 353endmenu 354 355config DEFAULT_FDT_FILE 356 string "Default fdt file" 357 help 358 This option is used to set the default fdt file to boot OS. 359 360config SYS_NO_FLASH 361 bool "Disable support for parallel NOR flash" 362 default n 363 help 364 This option is used to disable support for parallel NOR flash. 365 366config VERSION_VARIABLE 367 bool "add U-Boot environment variable vers" 368 default n 369 help 370 If this variable is defined, an environment variable 371 named "ver" is created by U-Boot showing the U-Boot 372 version as printed by the "version" command. 373 Any change to this variable will be reverted at the 374 next reset. 375 376config BOARD_LATE_INIT 377 bool 378 help 379 Sometimes board require some initialization code that might 380 require once the actual init done, example saving board specific env, 381 boot-modes etc. which eventually done at late. 382 383 So this config enable the late init code with the help of board_late_init 384 function which should defined on respective boards. 385 386config DISPLAY_CPUINFO 387 bool "Display information about the CPU during start up" 388 default y if ARM || BLACKFIN || NIOS2 || X86 || XTENSA || MPC5xxx 389 help 390 Display information about the CPU that U-Boot is running on 391 when U-Boot starts up. The function print_cpuinfo() is called 392 to do this. 393 394config DISPLAY_BOARDINFO 395 bool "Display information about the board during start up" 396 default y if ARM || M68K || MIPS || PPC || SPARC || XTENSA 397 help 398 Display information about the board that U-Boot is running on 399 when U-Boot starts up. The board function checkboard() is called 400 to do this. 401 402menu "Start-up hooks" 403 404config ARCH_EARLY_INIT_R 405 bool "Call arch-specific init soon after relocation" 406 default y if X86 407 help 408 With this option U-Boot will call arch_early_init_r() soon after 409 relocation. Driver model is running by this point, and the cache 410 is on. Note that board_early_init_r() is called first, if 411 enabled. This can be used to set up architecture-specific devices. 412 413config ARCH_MISC_INIT 414 bool "Call arch-specific init after relocation, when console is ready" 415 help 416 With this option U-Boot will call arch_misc_init() after 417 relocation to allow miscellaneous arch-dependent initialisation 418 to be performed. This function should be defined by the board 419 and will be called after the console is set up, after relocaiton. 420 421config BOARD_EARLY_INIT_F 422 bool "Call board-specific init before relocation" 423 default y if X86 424 help 425 Some boards need to perform initialisation as soon as possible 426 after boot. With this option, U-Boot calls board_early_init_f() 427 after driver model is ready in the pre-relocation init sequence. 428 Note that the normal serial console is not yet set up, but the 429 debug UART will be available if enabled. 430 431endmenu 432 433source "common/spl/Kconfig" 434