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| author |   Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
|---|---|---|
| committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
| commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
| tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/u-boot/doc/README.plan9 | |
| parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) | |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/u-boot/doc/README.plan9')
| -rw-r--r-- | qemu/roms/u-boot/doc/README.plan9 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/doc/README.plan9 b/qemu/roms/u-boot/doc/README.plan9 new file mode 100644 index 000000000..2d3d0e0cf --- /dev/null +++ b/qemu/roms/u-boot/doc/README.plan9 @@ -0,0 +1,18 @@ +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 |