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[oweals/u-boot.git] / README

diff --git a/README b/README
index 0fec497328bd5fd27df28efda7a14d828a106346..febefb50c24a9bc4efacb6d4224ef17b4b244763 100644 (file)
--- a/README
+++ b/README
@@ -182,7 +182,6 @@ Directory Hierarchy:
     /lib               Architecture specific library files
   /powerpc             Files generic to PowerPC architecture
     /cpu               CPU specific files
-      /74xx_7xx                Files specific to Freescale MPC74xx and 7xx CPUs
       /mpc5xx          Files specific to Freescale MPC5xx CPUs
       /mpc5xxx         Files specific to Freescale MPC5xxx CPUs
       /mpc8xx          Files specific to Freescale MPC8xx CPUs
@@ -1258,6 +1257,9 @@ The following options need to be configured:
                SoC, then define this variable and provide board
                specific code for the "hw_watchdog_reset" function.
 
+               CONFIG_AT91_HW_WDT_TIMEOUT
+               specify the timeout in seconds. default 2 seconds.
+
 - U-Boot Version:
                CONFIG_VERSION_VARIABLE
                If this variable is defined, an environment variable
@@ -3150,8 +3152,18 @@ CBFS (Coreboot Filesystem) support
                Enable the hash verify command (hash -v). This adds to code
                size a little.
 
-               CONFIG_SHA1 - support SHA1 hashing
-               CONFIG_SHA256 - support SHA256 hashing
+               CONFIG_SHA1 - This option enables support of hashing using SHA1
+               algorithm. The hash is calculated in software.
+               CONFIG_SHA256 - This option enables support of hashing using
+               SHA256 algorithm. The hash is calculated in software.
+               CONFIG_SHA_HW_ACCEL - This option enables hardware acceleration
+               for SHA1/SHA256 hashing.
+               This affects the 'hash' command and also the
+               hash_lookup_algo() function.
+               CONFIG_SHA_PROG_HW_ACCEL - This option enables
+               hardware-acceleration for SHA1/SHA256 progressive hashing.
+               Data can be streamed in a block at a time and the hashing
+               is performed in hardware.
 
                Note: There is also a sha1sum command, which should perhaps
                be deprecated in favour of 'hash sha1'.
@@ -3177,8 +3189,13 @@ CBFS (Coreboot Filesystem) support
                This enables the RSA algorithm used for FIT image verification
                in U-Boot. See doc/uImage.FIT/signature.txt for more information.
 
+               The Modular Exponentiation algorithm in RSA is implemented using
+               driver model. So CONFIG_DM needs to be enabled by default for this
+               library to function.
+
                The signing part is build into mkimage regardless of this
-               option.
+               option. The software based modular exponentiation is built into
+               mkimage irrespective of this option.
 
 - bootcount support:
                CONFIG_BOOTCOUNT_LIMIT
@@ -3440,8 +3457,10 @@ FIT uImage format:
 
                CONFIG_FIT_SIGNATURE
                This option enables signature verification of FIT uImages,
-               using a hash signed and verified using RSA. See
-               doc/uImage.FIT/signature.txt for more details.
+               using a hash signed and verified using RSA. If
+               CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
+               hashing is available using hardware, RSA library will use it.
+               See doc/uImage.FIT/signature.txt for more details.
 
                WARNING: When relying on signed FIT images with required
                signature check the legacy image format is default
@@ -4909,6 +4928,9 @@ Low Level (hardware related) configuration options:
 - CONFIG_FSL_DDR_INTERACTIVE
                Enable interactive DDR debugging. See doc/README.fsl-ddr.
 
+- CONFIG_FSL_DDR_SYNC_REFRESH
+               Enable sync of refresh for multiple controllers.
+
 - CONFIG_SYS_83XX_DDR_USES_CS0
                Only for 83xx systems. If specified, then DDR should
                be configured using CS0 and CS1 instead of CS2 and CS3.
@@ -5900,9 +5922,10 @@ option performs the converse operation of the mkimage's second form (the "-d"
 option). Given an image built by mkimage, the dumpimage extracts a "data file"
 from the image:
 
-       tools/dumpimage -i image -p position data_file
-         -i ==> extract from the 'image' a specific 'data_file', \
-          indexed by 'position'
+       tools/dumpimage -i image -T type -p position data_file
+         -i ==> extract from the 'image' a specific 'data_file'
+         -T ==> set image type to 'type'
+         -p ==> 'position' (starting at 0) of the 'data_file' inside the 'image'
 
 
 Installing a Linux Image: