Re: args from uboot

[Adam Hoka <adam.hoka%gmail.com@localhost>]

On Thu, 07 Oct 2010 18:33:42 +0900 (JST)
KIYOHARA Takashi <kiyohara%kk.iij4u.or.jp@localhost> wrote:

> Hi! adam,
> 
> 
> From: Adam Hoka <adam.hoka%gmail.com@localhost>
> Date: Thu, 7 Oct 2010 10:04:44 +0200
> 
> 
> > Do we have code to access boot args from u-boot?
> > If not, what needs to be done to support it?
> 
> Is it this that you wants?
> I was able to obtain this with gumstix(Overo) and Marvell Sheevaplug.
> 
>  <snip>
> 
> NetBSD/evbarm (sheevaplug) booting ...
> bootargs='console=ttyS0,115200 
> mtdparts=nand_mtd:0x400000@0x100000(uImage),0x1fb00000@0x500000(rootfs) rw 
> root=/dev/mtdblock1 rw 
> ip=10.4.50.4:10.4.50.5:10.4.50.5:255.255.255.0:DB88FXX81:eth0:none'
> Loaded initial symtab at 0xc0378ef8, strtab at 0xc03ae114, # entries 13514
> pmap_postinit: Allocated 35 static L1 descriptor tables
> Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
> 
>  <snip>
> 
> 
> This difference and marvell_start.S might be useful for you.
> In addition, gumstix_machdep.c supports 'go' and 'bootm'.
> 
> 
> Index: marvell_machdep.c
> ===================================================================
> RCS file: /cvsroot/src/sys/arch/evbarm/marvell/marvell_machdep.c,v
> retrieving revision 1.1
> diff -u -r1.1 marvell_machdep.c
> --- marvell_machdep.c   3 Oct 2010 06:03:10 -0000       1.1
> +++ marvell_machdep.c   7 Oct 2010 09:30:00 -0000
> @@ -291,6 +291,8 @@
>         uint32_t target, attr, base, size;
>         u_int l1pagetable;
>         int loop, pt_index, cs, memtag = 0, iotag = 0, window;
> +extern uint32_t *u_boot_args[];
> +enum { r0 = 0, r1 = 1, r2 = 2, r3 = 3 }; /* args from u-boot */
>  
>         /* map some peripheral registers */
>         pmap_devmap_bootstrap((vaddr_t)read_ttb(), marvell_devmap);
> @@ -421,6 +423,7 @@
>  #ifdef VERBOSE_INIT_ARM
>         printf("initarm: Configuring system ...\n");
>  #endif
> +printf("bootargs='%s'\n", (char *)u_boot_args[r3]);
>  
>         bootconfig.dramblocks = 0;
>         physical_end = physmem = 0;
> 
> 
> Thanks,
> --
> kiyohara


thanks, i will look at it

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