- document 'bootm_low' and 'bootm_size' environment variables
- update inaccurate CFG_BOOTMAPSZ entry
Signed-off-by: Bartlomiej Sieka <[EMAIL PROTECTED]>
---
Addressed comment by Kumar, changed patch description accordingly.
README | 21 +++++++++++++++++++--
1 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/README b/README
index 5d059e7..63b1417 100644
--- a/README
+++ b/README
@@ -1994,8 +1994,11 @@ Configuration Settings:
- CFG_BOOTMAPSZ:
Maximum size of memory mapped by the startup code of
the Linux kernel; all data that must be processed by
- the Linux kernel (bd_info, boot arguments, eventually
- initrd image) must be put below this limit.
+ the Linux kernel (bd_info, boot arguments, FDT blob if
+ used) must be put below this limit, unless "bootm_low"
+ enviroment variable is defined and non-zero. In such case
+ all data for the Linux kernel must be between "bootm_low"
+ and "bootm_low" + CFG_BOOTMAPSZ.
- CFG_MAX_FLASH_BANKS:
Max number of Flash memory banks
@@ -2733,6 +2736,20 @@ Some configuration options can be set using Environment
Variables:
bootfile - Name of the image to load with TFTP
+ bootm_low - Memory range available for image processing in the bootm
+ command can be restricted. This variable is given as
+ a hexadecimal number and defines lowest address allowed
+ for use by the bootm command. See also "bootm_size"
+ environment variable. Address defined by "bootm_low" is
+ also the base of the initial memory mapping for the Linux
+ kernel -- see the descripton of CFG_BOOTMAPSZ.
+
+ bootm_size - Memory range available for image processing in the bootm
+ command can be restricted. This variable is given as
+ a hexadecimal number and defines the size of the region
+ allowed for use by the bootm command. See also "bootm_low"
+ environment variable.
+
autoload - if set to "no" (any string beginning with 'n'),
"bootp" will just load perform a lookup of the
configuration from the BOOTP server, but not try to
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