X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=1d713596ec6f006752897a38829a1efd71cb6f09;hb=ad0fd965f7ac938923391667d2db5caa88d7bc6d;hp=2bc0d3560c7735d87d38df157d03005700b75bd0;hpb=bd83b5921201a61eb74ed7faa04c3f237d5323a2;p=u-boot diff --git a/README b/README index 2bc0d3560c..1d713596ec 100644 --- a/README +++ b/README @@ -252,15 +252,15 @@ Selection of Processor Architecture and Board Type: --------------------------------------------------- For all supported boards there are ready-to-use default -configurations available; just type "make _config". +configurations available; just type "make _defconfig". Example: For a TQM823L module type: cd u-boot - make TQM823L_config + make TQM823L_defconfig For the Cogent platform, you need to specify the CPU type as well; -e.g. "make cogent_mpc8xx_config". And also configure the cogent +e.g. "make cogent_mpc8xx_defconfig". And also configure the cogent directory according to the instructions in cogent/README. @@ -2288,6 +2288,21 @@ CBFS (Coreboot Filesystem) support 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) with a fix speed from 100000 and the slave addr 0! + - drivers/i2c/ihs_i2c.c + - activate this driver with CONFIG_SYS_I2C_IHS + - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0 + - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0 + - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0 + - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1 + - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1 + - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1 + - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2 + - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2 + - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2 + - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3 + - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3 + - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3 + additional defines: CONFIG_SYS_NUM_I2C_BUSES @@ -2582,6 +2597,10 @@ CBFS (Coreboot Filesystem) support Enables the driver for the SPI controllers on i.MX and MXC SoCs. Currently i.MX31/35/51 are supported. + CONFIG_SYS_SPI_MXC_WAIT + Timeout for waiting until spi transfer completed. + default: (CONFIG_SYS_HZ/100) /* 10 ms */ + - FPGA Support: CONFIG_FPGA Enables FPGA subsystem. @@ -3254,6 +3273,11 @@ FIT uImage format: disabled. If a board need legacy image format support enable this through CONFIG_IMAGE_FORMAT_LEGACY + CONFIG_FIT_DISABLE_SHA256 + Supporting SHA256 hashes has quite an impact on binary size. + For constrained systems sha256 hash support can be disabled + with this option. + - Standalone program support: CONFIG_STANDALONE_LOAD_ADDR @@ -3716,6 +3740,25 @@ Configuration Settings: - CONFIG_SYS_MALLOC_LEN: Size of DRAM reserved for malloc() use. +- CONFIG_SYS_MALLOC_F_LEN + Size of the malloc() pool for use before relocation. If + this is defined, then a very simple malloc() implementation + will become available before relocation. The address is just + below the global data, and the stack is moved down to make + space. + + This feature allocates regions with increasing addresses + within the region. calloc() is supported, but realloc() + is not available. free() is supported but does nothing. + The memory will be freed (or in fact just forgotton) when + U-Boot relocates itself. + + Pre-relocation malloc() is only supported on sandbox + at present but is fairly easy to enable for other archs. + + Pre-relocation malloc() is only supported on ARM at present + but is fairly easy to enable for other archs. + - CONFIG_SYS_BOOTM_LEN: Normally compressed uImages are limited to an uncompressed size of 8 MBytes. If this is not enough, @@ -4804,9 +4847,9 @@ U-Boot is intended to be simple to build. After installing the sources you must configure U-Boot for one specific board type. This is done by typing: - make NAME_config + make NAME_defconfig -where "NAME_config" is the name of one of the existing configu- +where "NAME_defconfig" is the name of one of the existing configu- rations; see boards.cfg for supported names. Note: for some board special configuration names may exist; check if @@ -4815,10 +4858,10 @@ Note: for some board special configuration names may exist; check if or with LCD support. You can select such additional "features" when choosing the configuration, i. e. - make TQM823L_config + make TQM823L_defconfig - will configure for a plain TQM823L, i. e. no LCD support - make TQM823L_LCD_config + make TQM823L_LCD_defconfig - will configure for a TQM823L with U-Boot console on LCD etc. @@ -4838,14 +4881,14 @@ this behavior and build U-Boot to some external directory: 1. Add O= to the make command line invocations: make O=/tmp/build distclean - make O=/tmp/build NAME_config + make O=/tmp/build NAME_defconfig make O=/tmp/build all 2. Set environment variable BUILD_DIR to point to the desired location: export BUILD_DIR=/tmp/build make distclean - make NAME_config + make NAME_defconfig make all Note that the command line "O=" setting overrides the BUILD_DIR environment @@ -4871,7 +4914,7 @@ steps: your board 3. If you're porting U-Boot to a new CPU, then also create a new directory to hold your CPU specific code. Add any files you need. -4. Run "make _config" with your new name. +4. Run "make _defconfig" with your new name. 5. Type "make", and you should get a working "u-boot.srec" file to be installed on your target system. 6. Debug and solve any problems that might arise. @@ -5451,7 +5494,7 @@ which was introduced for our predecessor project PPCBoot and uses a Example: - make TQM850L_config + make TQM850L_defconfig make oldconfig make dep make uImage