mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-11-04 02:11:25 +01:00
eeaef5e430
This patch introduces support for command line arguments to Plan 9. Plan 9 generally dedicates a small region of kernel memory (known as CONFADDR) for runtime configuration. A new environment variable named confaddr was introduced to indicate this location when copying arguments. Signed-off-by: Steven Stallion <sstallion@gmail.com> [trini: Adapt for Simon's changes about correcting argc, no need to bump by 2 now] Signed-off-by: Tom Rini <trini@ti.com>
19 lines
785 B
Plaintext
19 lines
785 B
Plaintext
Plan 9 from Bell Labs kernel images require additional setup to pass
|
|
configuration information to the kernel. An environment variable named
|
|
confaddr must be defined with the same value as CONFADDR (see mem.h).
|
|
Use of this facility is optional, but should be preferable to manual
|
|
configuration.
|
|
|
|
When booting an image, arguments supplied to the bootm command will be
|
|
copied to CONFADDR. If no arguments are specified, the contents of the
|
|
bootargs environment variable will be copied.
|
|
|
|
If no command line arguments or bootargs are defined, CONFADDR is left
|
|
uninitialized to permit manual configuration. For example, PC-style
|
|
configuration could be simulated by issuing a fatload in bootcmd:
|
|
|
|
# setenv bootcmd fatload mmc 0 $confaddr plan9.ini; ...; bootm
|
|
|
|
Steven Stallion
|
|
June 2013
|