NAND: add NAND_CMD_PARAM (0xec) definition

[people/ms/u-boot.git] / README

diff --git a/README b/README
index f997a5d8605e91ff085da24eeaceac926cf9f194..68f5fb09180ec39b4f87306a75e9902347e48cec 100644 (file)
--- a/README
+++ b/README
@@ -2248,7 +2248,7 @@ Configuration Settings:
 - CONFIG_SYS_MONITOR_BASE:
                Physical start address of boot monitor code (set by
                make config files to be same as the text base address
-               (TEXT_BASE) used when linking) - same as
+               (CONFIG_SYS_TEXT_BASE) used when linking) - same as
                CONFIG_SYS_FLASH_BASE when booting from flash.
 
 - CONFIG_SYS_MONITOR_LEN:
@@ -2275,6 +2275,19 @@ Configuration Settings:
                all data for the Linux kernel must be between "bootm_low"
                and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.
 
+- CONFIG_SYS_BOOT_RAMDISK_HIGH:
+               Enable initrd_high functionality.  If defined then the
+               initrd_high feature is enabled and the bootm ramdisk subcommand
+               is enabled.
+
+- CONFIG_SYS_BOOT_GET_CMDLINE:
+               Enables allocating and saving kernel cmdline in space between
+               "bootm_low" and "bootm_low" + BOOTMAPSZ.
+
+- CONFIG_SYS_BOOT_GET_KBD:
+               Enables allocating and saving a kernel copy of the bd_info in
+               space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
+
 - CONFIG_SYS_MAX_FLASH_BANKS:
                Max number of Flash memory banks
 
@@ -2351,11 +2364,11 @@ Configuration Settings:
 
 - CONFIG_ENV_MAX_ENTRIES
 
-        Maximum number of entries in the hash table that is used
-        internally to store the environment settings. The default
-        setting is supposed to be generous and should work in most
-        cases. This setting can be used to tune behaviour; see
-        lib/hashtable.c for details.
+       Maximum number of entries in the hash table that is used
+       internally to store the environment settings. The default
+       setting is supposed to be generous and should work in most
+       cases. This setting can be used to tune behaviour; see
+       lib/hashtable.c for details.
 
 The following definitions that deal with the placement and management
 of environment data (variable area); in general, we support the
@@ -2534,18 +2547,32 @@ to save the current settings.
        - CONFIG_ENV_SIZE:
 
          These two #defines specify the offset and size of the environment
-         area within the first NAND device.
+         area within the first NAND device.  CONFIG_ENV_OFFSET must be
+         aligned to an erase block boundary.
 
-       - CONFIG_ENV_OFFSET_REDUND
+       - CONFIG_ENV_OFFSET_REDUND (optional):
 
          This setting describes a second storage area of CONFIG_ENV_SIZE
-         size used to hold a redundant copy of the environment data,
-         so that there is a valid backup copy in case there is a
-         power failure during a "saveenv" operation.
+         size used to hold a redundant copy of the environment data, so
+         that there is a valid backup copy in case there is a power failure
+         during a "saveenv" operation.  CONFIG_ENV_OFFSET_RENDUND must be
+         aligned to an erase block boundary.
+
+       - CONFIG_ENV_RANGE (optional):
 
-       Note: CONFIG_ENV_OFFSET and CONFIG_ENV_OFFSET_REDUND must be aligned
-       to a block boundary, and CONFIG_ENV_SIZE must be a multiple of
-       the NAND devices block size.
+         Specifies the length of the region in which the environment
+         can be written.  This should be a multiple of the NAND device's
+         block size.  Specifying a range with more erase blocks than
+         are needed to hold CONFIG_ENV_SIZE allows bad blocks within
+         the range to be avoided.
+
+       - CONFIG_ENV_OFFSET_OOB (optional):
+
+         Enables support for dynamically retrieving the offset of the
+         environment from block zero's out-of-band data.  The
+         "nand env.oob" command can be used to record this offset.
+         Currently, CONFIG_ENV_OFFSET_REDUND is not supported when
+         using CONFIG_ENV_OFFSET_OOB.
 
 - CONFIG_NAND_ENV_DST
 
@@ -2659,7 +2686,7 @@ Low Level (hardware related) configuration options:
                area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually
                CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial
                data is located at the end of the available space
-               (sometimes written as (CONFIG_SYS_INIT_RAM_END -
+               (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE -
                CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just
                below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR +
                CONFIG_SYS_GBL_DATA_OFFSET) downward.
@@ -2809,19 +2836,17 @@ Low Level (hardware related) configuration options:
                globally (CONFIG_CMD_MEM).
 
 - CONFIG_SKIP_LOWLEVEL_INIT
-- CONFIG_SKIP_RELOCATE_UBOOT
+               [ARM only] If this variable is defined, then certain
+               low level initializations (like setting up the memory
+               controller) are omitted and/or U-Boot does not
+               relocate itself into RAM.
 
-               [ARM only] If these variables are defined, then
-               certain low level initializations (like setting up
-               the memory controller) are omitted and/or U-Boot does
-               not relocate itself into RAM.
-               Normally these variables MUST NOT be defined. The
-               only exception is when U-Boot is loaded (to RAM) by
-               some other boot loader or by a debugger which
-               performs these initializations itself.
+               Normally this variable MUST NOT be defined. The only
+               exception is when U-Boot is loaded (to RAM) by some
+               other boot loader or by a debugger which performs
+               these initializations itself.
 
 - CONFIG_PRELOADER
-
                Modifies the behaviour of start.S when compiling a loader
                that is executed before the actual U-Boot. E.g. when
                compiling a NAND SPL.