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Diffstat (limited to 'README')
| -rw-r--r-- | README | 16 |
1 files changed, 14 insertions, 2 deletions
@@ -2362,7 +2362,10 @@ 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 + CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, + then the value in "bootm_size" will be used instead. - CONFIG_SYS_BOOT_RAMDISK_HIGH: Enable initrd_high functionality. If defined then the @@ -3204,7 +3207,16 @@ 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 |