[uClinux-dev] finding the root device

Erwin Authried eauth at softsys.co.at
Thu Sep 20 06:46:53 EDT 2012


Hi,

you can use something like "root=31:00" in the kernel cmdline.

Regards,
Erwin 

Am Thursday, den 20.09.2012, 12:38 +0200 schrieb Richard Cochran:
> I am running mainline Linux on the Freescale/Axiom M5234BCC with uboot
> 2011.09-01111-g0562219 and have been carrying along a patch from the
> uClinux-dist, like shown below for v3.2.9.
> 
> I create a image by concatenating the kernel with a romfs, and I boot
> it by loading over tftp and jumping to the image with the uboot 'go'
> command.
> 
> My question: Is there a way to pass the kernel command line from uboot
> to specify the root device, instead of using this patch?
> 
> Thanks,
> Richard
> 
> 
> diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
> index 6793074..9cf7df5 100644
> --- a/drivers/mtd/maps/uclinux.c
> +++ b/drivers/mtd/maps/uclinux.c
> @@ -15,6 +15,7 @@
>  #include <linux/fs.h>
>  #include <linux/mm.h>
>  #include <linux/major.h>
> +#include <linux/root_dev.h>
>  #include <linux/mtd/mtd.h>
>  #include <linux/mtd/map.h>
>  #include <linux/mtd/partitions.h>
> @@ -89,6 +90,7 @@ static int __init uclinux_mtd_init(void)
>  	mtd->priv = mapp;
>  
>  	uclinux_ram_mtdinfo = mtd;
> +	ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 0);
>  	mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS);
>  
>  	return(0);
> _______________________________________________
> uClinux-dev mailing list
> uClinux-dev at uclinux.org
> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> This message was resent by uclinux-dev at uclinux.org
> To unsubscribe see:
> http://mailman.uclinux.org/mailman/options/uclinux-dev

-- 
Dipl.-Ing. Erwin Authried
Softwareentwicklung und Systemdesign




More information about the uClinux-dev mailing list