1 # 2 # For a description of the syntax of this configuration file, 3 # see Documentation/kbuild/kconfig-language.txt. 4 # 5 mainmenu "U-Boot $UBOOTVERSION Configuration" 6 7 config UBOOTVERSION 8 string 9 option env="UBOOTVERSION" 10 11 # Allow defaults in arch-specific code to override any given here 12 source "arch/Kconfig" 13 14 menu "General setup" 15 16 config 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 26 config 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 46 config 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 55 config 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 64 config 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 74 menuconfig 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 83 if 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. 99 endif 100 endmenu # General setup 101 102 menu "Boot images" 103 104 config SUPPORT_SPL 105 bool 106 107 config SUPPORT_TPL 108 bool 109 110 config 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. 116 117 config SPL_STACK_R 118 depends on SPL 119 bool "Enable SDRAM location for SPL stack" 120 help 121 SPL starts off execution in SRAM and thus typically has only a small 122 stack available. Since SPL sets up DRAM while in its board_init_f() 123 function, it is possible for the stack to move there before 124 board_init_r() is reached. This option enables a special SDRAM 125 location for the SPL stack. U-Boot SPL switches to this after 126 board_init_f() completes, and before board_init_r() starts. 127 128 config SPL_STACK_R_ADDR 129 depends on SPL_STACK_R 130 hex "SDRAM location for SPL stack" 131 help 132 Specify the address in SDRAM for the SPL stack. This will be set up 133 before board_init_r() is called. 134 135 config TPL 136 bool 137 depends on SPL && SUPPORT_TPL 138 prompt "Enable TPL" 139 help 140 If you want to build TPL as well as the normal image and SPL, say Y. 141 142 config FIT 143 bool "Support Flattened Image Tree" 144 help 145 This option allows to boot the new uImage structrure, 146 Flattened Image Tree. FIT is formally a FDT, which can include 147 images of various types (kernel, FDT blob, ramdisk, etc.) 148 in a single blob. To boot this new uImage structure, 149 pass the the address of the blob to the "bootm" command. 150 151 config FIT_VERBOSE 152 bool "Display verbose messages on FIT boot" 153 depends on FIT 154 155 config FIT_SIGNATURE 156 bool "Enable signature verification of FIT uImages" 157 depends on FIT 158 depends on DM 159 select RSA 160 help 161 This option enables signature verification of FIT uImages, 162 using a hash signed and verified using RSA. If 163 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive 164 hashing is available using hardware, RSA library will use it. 165 See doc/uImage.FIT/signature.txt for more details. 166 167 config SYS_EXTRA_OPTIONS 168 string "Extra Options (DEPRECATED)" 169 help 170 The old configuration infrastructure (= mkconfig + boards.cfg) 171 provided the extra options field. If you have something like 172 "HAS_BAR,BAZ=64", the optional options 173 #define CONFIG_HAS 174 #define CONFIG_BAZ 64 175 will be defined in include/config.h. 176 This option was prepared for the smooth migration from the old 177 configuration to Kconfig. Since this option will be removed sometime, 178 new boards should not use this option. 179 180 config SYS_TEXT_BASE 181 depends on SPARC || ARC || X86 || ARCH_UNIPHIER 182 hex "Text Base" 183 help 184 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture 185 186 config SYS_CLK_FREQ 187 depends on ARC || ARCH_SUNXI 188 int "CPU clock frequency" 189 help 190 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture 191 192 endmenu # Boot images 193 194 source "common/Kconfig" 195 196 source "dts/Kconfig" 197 198 source "net/Kconfig" 199 200 source "drivers/Kconfig" 201 202 source "fs/Kconfig" 203 204 source "lib/Kconfig" 205 206 source "test/Kconfig" 207