config: introduce a generic $bootcmd

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 4ac73996983add08d11a15875fa203a5f8fd3393..1d713596ec6f006752897a38829a1efd71cb6f09 100644 (file)
--- 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 <board_name>_config".
+configurations available; just type "make <board_name>_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.
 
 
@@ -2597,6 +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.
@@ -3736,6 +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,
@@ -4824,9 +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
@@ -4835,10 +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.
@@ -4858,14 +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
@@ -4891,7 +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 <board>_config" with your new name.
+4.  Run "make <board>_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.
@@ -5471,7 +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