1# 2# For a description of the syntax of this configuration file, 3# see Documentation/kbuild/kconfig-language.txt. 4# 5mainmenu "U-Boot $UBOOTVERSION Configuration" 6 7config UBOOTVERSION 8 string 9 option env="UBOOTVERSION" 10 11# Allow defaults in arch-specific code to override any given here 12source "arch/Kconfig" 13 14menu "General setup" 15 16config LOCALVERSION 17 string "Local version - append to U-Boot release" 18 help 19 Append an extra string to the end of your U-Boot version. 20 This will show up on your boot log, for example. 21 The string you set here will be appended after the contents of 22 any files with a filename matching localversion* in your 23 object and source tree, in that order. Your total string can 24 be a maximum of 64 characters. 25 26config LOCALVERSION_AUTO 27 bool "Automatically append version information to the version string" 28 default y 29 help 30 This will try to automatically determine if the current tree is a 31 release tree by looking for git tags that belong to the current 32 top of tree revision. 33 34 A string of the format -gxxxxxxxx will be added to the localversion 35 if a git-based tree is found. The string generated by this will be 36 appended after any matching localversion* files, and after the value 37 set in CONFIG_LOCALVERSION. 38 39 (The actual string used here is the first eight characters produced 40 by running the command: 41 42 $ git rev-parse --verify HEAD 43 44 which is done within the script "scripts/setlocalversion".) 45 46config CC_OPTIMIZE_FOR_SIZE 47 bool "Optimize for size" 48 default y 49 help 50 Enabling this option will pass "-Os" instead of "-O2" to gcc 51 resulting in a smaller U-Boot image. 52 53 This option is enabled by default for U-Boot. 54 55config SYS_MALLOC_F 56 bool "Enable malloc() pool before relocation" 57 default y if DM 58 help 59 Before relocation memory is very limited on many platforms. Still, 60 we can provide a small malloc() pool if needed. Driver model in 61 particular needs this to operate, so that it can allocate the 62 initial serial device and any others that are needed. 63 64config SYS_MALLOC_F_LEN 65 hex "Size of malloc() pool before relocation" 66 depends on SYS_MALLOC_F 67 default 0x400 68 help 69 Before relocation memory is very limited on many platforms. Still, 70 we can provide a small malloc() pool if needed. Driver model in 71 particular needs this to operate, so that it can allocate the 72 initial serial device and any others that are needed. 73 74menuconfig EXPERT 75 bool "Configure standard U-Boot features (expert users)" 76 default y 77 help 78 This option allows certain base U-Boot options and settings 79 to be disabled or tweaked. This is for specialized 80 environments which can tolerate a "non-standard" U-Boot. 81 Only use this if you really know what you are doing. 82 83if EXPERT 84 config SYS_MALLOC_CLEAR_ON_INIT 85 bool "Init with zeros the memory reserved for malloc (slow)" 86 default y 87 help 88 This setting is enabled by default. The reserved malloc 89 memory is initialized with zeros, so first malloc calls 90 will return the pointer to the zeroed memory. But this 91 slows the boot time. 92 93 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN 94 value, has more than few MiB, e.g. when uses bzip2 or bmp logo. 95 Then the boot time can be significantly reduced. 96 Warning: 97 When disabling this, please check if malloc calls, maybe 98 should be replaced by calloc - if expects zeroed memory. 99endif 100endmenu # General setup 101 102menu "Boot images" 103 104config SUPPORT_SPL 105 bool 106 107config SUPPORT_TPL 108 bool 109 110config SPL 111 bool 112 depends on SUPPORT_SPL 113 prompt "Enable SPL" 114 help 115 If you want to build SPL as well as the normal image, say Y. 116 117config SPL_SYS_MALLOC_SIMPLE 118 bool 119 depends on SPL 120 prompt "Only use malloc_simple functions in the spl" 121 help 122 Say Y here to only use the *_simple malloc functions from 123 malloc_simple.c, rather then using the versions from dlmalloc.c 124 this will make the SPL binary smaller at the cost of more heap 125 usage as the *_simple malloc functions do not re-use free-ed mem. 126 127config SPL_STACK_R 128 depends on SPL 129 bool "Enable SDRAM location for SPL stack" 130 help 131 SPL starts off execution in SRAM and thus typically has only a small 132 stack available. Since SPL sets up DRAM while in its board_init_f() 133 function, it is possible for the stack to move there before 134 board_init_r() is reached. This option enables a special SDRAM 135 location for the SPL stack. U-Boot SPL switches to this after 136 board_init_f() completes, and before board_init_r() starts. 137 138config SPL_STACK_R_ADDR 139 depends on SPL_STACK_R 140 hex "SDRAM location for SPL stack" 141 help 142 Specify the address in SDRAM for the SPL stack. This will be set up 143 before board_init_r() is called. 144 145config SPL_STACK_R_MALLOC_SIMPLE_LEN 146 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE 147 hex "Size of malloc_simple heap after switching to DRAM SPL stack" 148 default 0x100000 149 help 150 Specify the amount of the stack to use as memory pool for 151 malloc_simple after switching the stack to DRAM. This may be set 152 to give board_init_r() a larger heap then the initial heap in 153 SRAM which is limited to SYS_MALLOC_F_LEN bytes. 154 155config TPL 156 bool 157 depends on SPL && SUPPORT_TPL 158 prompt "Enable TPL" 159 help 160 If you want to build TPL as well as the normal image and SPL, say Y. 161 162config FIT 163 bool "Support Flattened Image Tree" 164 help 165 This option allows to boot the new uImage structrure, 166 Flattened Image Tree. FIT is formally a FDT, which can include 167 images of various types (kernel, FDT blob, ramdisk, etc.) 168 in a single blob. To boot this new uImage structure, 169 pass the address of the blob to the "bootm" command. 170 171config FIT_VERBOSE 172 bool "Display verbose messages on FIT boot" 173 depends on FIT 174 175config FIT_SIGNATURE 176 bool "Enable signature verification of FIT uImages" 177 depends on FIT 178 depends on DM 179 select RSA 180 help 181 This option enables signature verification of FIT uImages, 182 using a hash signed and verified using RSA. If 183 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 184 hashing is available using hardware, RSA library will use it. 185 See doc/uImage.FIT/signature.txt for more details. 186 187config SYS_EXTRA_OPTIONS 188 string "Extra Options (DEPRECATED)" 189 help 190 The old configuration infrastructure (= mkconfig + boards.cfg) 191 provided the extra options field. If you have something like 192 "HAS_BAR,BAZ=64", the optional options 193 #define CONFIG_HAS 194 #define CONFIG_BAZ 64 195 will be defined in include/config.h. 196 This option was prepared for the smooth migration from the old 197 configuration to Kconfig. Since this option will be removed sometime, 198 new boards should not use this option. 199 200config SYS_TEXT_BASE 201 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP 202 depends on !EFI_APP 203 hex "Text Base" 204 help 205 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 206 207config SYS_CLK_FREQ 208 depends on ARC || ARCH_SUNXI 209 int "CPU clock frequency" 210 help 211 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 212 213endmenu # Boot images 214 215source "common/Kconfig" 216 217source "dts/Kconfig" 218 219source "net/Kconfig" 220 221source "drivers/Kconfig" 222 223source "fs/Kconfig" 224 225source "lib/Kconfig" 226 227source "test/Kconfig" 228