path: root/README
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authorWolfgang Denk <wd@denx.de>2011-04-27 21:45:31 +0200
committerWolfgang Denk <wd@denx.de>2011-04-27 21:45:31 +0200
commit34b5fc4d8bba594d53a15be970ca78b03db9d7f5 (patch)
treefd9491a405ba0edd8c60e4f9f03916a8a1e891b9 /README
parent547bea12cc9dd72b4e1cd0383d7f1ecb0e43e139 (diff)
parent55b0a39314562087143f439ecae57379b97db9aa (diff)
Merge branch 'master' of git://git.denx.de/u-boot-fdt
Diffstat (limited to 'README')
1 files changed, 14 insertions, 2 deletions
diff --git a/README b/README
index cdbb9de02..b647ecac3 100644
--- a/README
+++ b/README
@@ -2348,7 +2348,10 @@ Configuration Settings:
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" + CONFIG_SYS_BOOTMAPSZ.
+ and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment
+ variable "bootm_mapsize" will override the value of
+ then the value in "bootm_size" will be used instead.
Enable initrd_high functionality. If defined then the
@@ -3184,7 +3187,16 @@ List of environment variables (most likely not complete):
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 description of CONFIG_SYS_BOOTMAPSZ.
+ kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and
+ bootm_mapsize.
+ bootm_mapsize - Size of the initial memory mapping for the Linux kernel.
+ This variable is given as a hexadecimal number and it
+ defines the size of the memory region starting at base
+ address bootm_low that is accessible by the Linux kernel
+ during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used
+ as the default value if it is defined, and bootm_size is
+ used otherwise.
bootm_size - Memory range available for image processing in the bootm
command can be restricted. This variable is given as