X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=7f2506a9b9c2335fdfd9ef3644797bb1b60509e3;hb=a5796c51ce87870cde39c0b9cd29ac775d0fb514;hp=a620f0a474465bf64b6f3a2bf9a795b9bf5a6316;hpb=632efa744013205c5f9a2a5fe21bfd0f968d00c7;p=u-boot diff --git a/README b/README index a620f0a474..7f2506a9b9 100644 --- a/README +++ b/README @@ -485,6 +485,16 @@ The following options need to be configured: Thumb2 this flag will result in Thumb2 code generated by GCC. + CONFIG_ARM_ERRATA_742230 + CONFIG_ARM_ERRATA_743622 + CONFIG_ARM_ERRATA_751472 + + If set, the workarounds for these ARM errata are applied early + during U-Boot startup. Note that these options force the + workarounds to be applied; no CPU-type/version detection + exists, unlike the similar options in the Linux kernel. Do not + set these options unless they apply! + - Linux Kernel Interface: CONFIG_CLOCKS_IN_MHZ @@ -1533,6 +1543,17 @@ CBFS (Coreboot Filesystem) support allows for a "silent" boot where a splash screen is loaded very quickly after power-on. + CONFIG_SPLASHIMAGE_GUARD + + If this option is set, then U-Boot will prevent the environment + variable "splashimage" from being set to a problematic address + (see README.displaying-bmps and README.arm-unaligned-accesses). + This option is useful for targets where, due to alignment + restrictions, an improperly aligned BMP image will cause a data + abort. If you think you will not have problems with unaligned + accesses (for example because your toolchain prevents them) + there is no need to set this option. + CONFIG_SPLASH_SCREEN_ALIGN If this option is set the splash image can be freely positioned @@ -1553,6 +1574,14 @@ CBFS (Coreboot Filesystem) support => vertically centered image at x = dspWidth - bmpWidth - 9 + CONFIG_SPLASH_SCREEN_PREPARE + + If this option is set then the board_splash_screen_prepare() + function, which must be defined in your code, is called as part + of the splash screen display sequence. It gives the board an + opportunity to prepare the splash image data before it is + processed and sent to the frame buffer by U-Boot. + - Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP If this option is set, additionally to standard BMP