X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=README;h=fe21bbf9824a72ace81215579f4028c5f91d1802;hb=4831141e23d195cb6de08d5c34f68afbdd67fcff;hp=d0869a8b558b13a95a3af94e8fb5945cdf08a80c;hpb=5f404075f19d51b646ac163e29f22f516ecafd59;p=karo-tx-uboot.git diff --git a/README b/README index d0869a8b55..fe21bbf982 100644 --- a/README +++ b/README @@ -1058,6 +1058,9 @@ The following options need to be configured: bytes are output before the console is initialised, the earlier bytes are discarded. + Note that when printing the buffer a copy is made on the + stack so CONFIG_PRE_CON_BUF_SZ must fit on the stack. + 'Sane' compilers will generate smaller code if CONFIG_PRE_CON_BUF_SZ is a power of 2 @@ -1084,8 +1087,6 @@ The following options need to be configured: CONFIG_AUTOBOOT_PROMPT CONFIG_AUTOBOOT_DELAY_STR CONFIG_AUTOBOOT_STOP_STR - CONFIG_AUTOBOOT_DELAY_STR2 - CONFIG_AUTOBOOT_STOP_STR2 CONFIG_ZERO_BOOTDELAY_CHECK CONFIG_RESET_TO_RETRY @@ -1157,9 +1158,7 @@ The following options need to be configured: Monitor commands can be included or excluded from the build by using the #include files and #undef'ing unwanted - commands, or using - and augmenting with additional #define's - for wanted commands. + commands, or adding #define's for wanted commands. The default command configuration includes all commands except those marked below with a "*". @@ -1782,7 +1781,7 @@ The following options need to be configured: key for the Replay Protection Memory Block partition in eMMC. - USB Device Firmware Update (DFU) class support: - CONFIG_DFU_FUNCTION + CONFIG_USB_FUNCTION_DFU This enables the USB portion of the DFU USB class CONFIG_CMD_DFU @@ -1827,6 +1826,9 @@ The following options need to be configured: sending again an USB request to the device. - USB Device Android Fastboot support: + CONFIG_USB_FUNCTION_FASTBOOT + This enables the USB part of the fastboot gadget + CONFIG_CMD_FASTBOOT This enables the command "fastboot" which enables the Android fastboot mode for the platform's USB device. Fastboot is a USB @@ -1838,12 +1840,12 @@ The following options need to be configured: This enables support for booting images which use the Android image format header. - CONFIG_USB_FASTBOOT_BUF_ADDR + CONFIG_FASTBOOT_BUF_ADDR The fastboot protocol requires a large memory buffer for downloads. Define this to the starting RAM address to use for downloaded images. - CONFIG_USB_FASTBOOT_BUF_SIZE + CONFIG_FASTBOOT_BUF_SIZE The fastboot protocol requires a large memory buffer for downloads. This buffer should be as large as possible for a platform. Define this to the size available RAM for fastboot. @@ -2217,18 +2219,6 @@ CBFS (Coreboot Filesystem) support Some PHY like Intel LXT971A need extra delay after command issued before MII status register can be read -- Ethernet address: - CONFIG_ETHADDR - CONFIG_ETH1ADDR - CONFIG_ETH2ADDR - CONFIG_ETH3ADDR - CONFIG_ETH4ADDR - CONFIG_ETH5ADDR - - Define a default value for Ethernet address to use - for the respective Ethernet interface, in case this - is not determined automatically. - - IP address: CONFIG_IPADDR @@ -2994,8 +2984,8 @@ CBFS (Coreboot Filesystem) support completely disabled. Anybody can change or delete these parameters. - Alternatively, if you #define _both_ CONFIG_ETHADDR - _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default + Alternatively, if you define _both_ an ethaddr in the + default env _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default Ethernet address is installed in the environment, which can be changed exactly ONCE by the user. [The serial# is unaffected by this, i. e. it remains @@ -3169,6 +3159,19 @@ CBFS (Coreboot Filesystem) support this is instead controlled by the value of /config/load-environment. +- Parallel Flash support: + CONFIG_SYS_NO_FLASH + + Traditionally U-boot was run on systems with parallel NOR + flash. This option is used to disable support for parallel NOR + flash. This option should be defined if the board does not have + parallel flash. + + If this option is not defined one of the generic flash drivers + (e.g. CONFIG_FLASH_CFI_DRIVER or CONFIG_ST_SMI) must be + selected or the board must provide an implementation of the + flash API (see include/flash.h). + - DataFlash Support: CONFIG_HAS_DATAFLASH @@ -3200,11 +3203,6 @@ CBFS (Coreboot Filesystem) support Define this option to include a destructive SPI flash test ('sf test'). - CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg - - Define this option to use the Bank addr/Extended addr - support on SPI flashes which has size > 16Mbytes. - CONFIG_SF_DUAL_FLASH Dual flash memories Define this option to use dual flash support where two flash @@ -4272,6 +4270,10 @@ Configuration Settings: list, simply add an entry for the same variable name to the ".flags" variable. + If CONFIG_REGEX is defined, the variable_name above is evaluated as a + regular expression. This allows multiple variables to define the same + flags without explicitly listing them for each variable. + - CONFIG_ENV_ACCESS_IGNORE_FORCE If defined, don't allow the -f switch to env set override variable access flags. @@ -5185,6 +5187,33 @@ within that device. normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the virtual address in NOR flash. +Freescale Layerscape Debug Server Support: +------------------------------------------- +The Freescale Layerscape Debug Server Support supports the loading of +"Debug Server firmware" and triggering SP boot-rom. +This firmware often needs to be loaded during U-Boot booting. + +- CONFIG_FSL_DEBUG_SERVER + Enable the Debug Server for Layerscape SoCs. + +- CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE + Define minimum DDR size required for debug server image + +- CONFIG_SYS_MEM_TOP_HIDE_MIN + Define minimum DDR size to be hided from top of the DDR memory + +Reproducible builds +------------------- + +In order to achieve reproducible builds, timestamps used in the U-Boot build +process have to be set to a fixed value. + +This is done using the SOURCE_DATE_EPOCH environment variable. +SOURCE_DATE_EPOCH is to be set on the build host's shell, not as a configuration +option for U-Boot or an environment variable in U-Boot. + +SOURCE_DATE_EPOCH should be set to a number of seconds since the epoch, in UTC. + Building the Software: ====================== @@ -5670,6 +5699,10 @@ override any association in the static list. You can define CONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the ".callbacks" environment variable in the default or embedded environment. +If CONFIG_REGEX is defined, the variable_name above is evaluated as a +regular expression. This allows multiple variables to be connected to +the same callback without explicitly listing them all out. + Command Line Parsing: ===================== @@ -5744,7 +5777,8 @@ o If both the SROM and the environment contain a MAC address, and the warning is printed. o If neither SROM nor the environment contain a MAC address, an error - is raised. + is raised. If CONFIG_NET_RANDOM_ETHADDR is defined, then in this case + a random, locally-assigned MAC is used. If Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses will be programmed into hardware as part of the initialization process. This