When studying the u-boot (1.2.0) source code I have found that it is register r6 and r7 which pass the location of the command line parameters and the size.
The location of the parameters could be changed in u-boot according to the macro: CFG_BOOTMAPSZ
There is however the message in all configuration files for u-boot that Linux can only map first initial 8MB so it seems to be not possible to set CFG_BOOTMAPSZ to something higher than 8MB?
/* * For booting Linux, the board info and command line data * have to be in the first 8 MB of memory, since this is * the maximum mapped by the Linux kernel during initialization. */ #define CFG_BOOTMAPSZ (8 << 20) /* Initial Memory map for Linux */
Does somebody have an idea how to bypass this limitation in linux 2.6.23 or higher?
M.