On 10:28 Tue 19 Oct , Juergen Beisert wrote:
> Marek Belisko wrote:
> > This work is mainly based on a9m2440 board implementation
> > from Juergen Beisert <jbe@xxxxxxxxxxxxxx>. Functionality
> > was tested only running barebox from ram. Loading to flash
> > and booting will not work because missing lowlevel_init
> > functionality (lack of jtag debugger on my side ;)).
>
> I have now access to a mini2440 at Pengutronix. I will add this feature soon.
>
> > [...]
> > +static int mini2440_devices_init(void)
> > +{
> > + uint32_t reg;
> > +
> > + reg = readl(BWSCON);
> > +
> > + /* CS#4 to access the network controller */
> > + reg &= ~0x000f0000;
> > + reg |= 0x000d0000; /* 16 bit */
> > + writel(0x1f4c, BANKCON4);
> > +
> > + writel(reg, BWSCON);
> > +
> > + /* release the reset signal to external devices */
> > + reg = readl(MISCCR);
> > + reg |= 0x10000;
> > + writel(reg, MISCCR);
> > +
> > + register_device(&nand_dev);
> > + register_device(&sdram_dev);
> > + register_device(&dm9000_dev);
> > +#ifdef CONFIG_NAND
> > + /* ----------- add some vital partitions -------- */
> > + devfs_del_partition("self_raw");
> > + devfs_add_partition("nand0", 0x00000, 0x40000, PARTITION_FIXED,
> > "self_raw"); + dev_add_bb_dev("self_raw", NULL);
> > +
> > + devfs_del_partition("env_raw");
> > + devfs_add_partition("nand0", 0x40000, 0x20000, PARTITION_FIXED,
> > "env_raw"); + dev_add_bb_dev("env_raw", NULL);
> > +#endif
> > + armlinux_add_dram(&sdram_dev);
> > + armlinux_set_bootparams((void *)sdram_dev.map_base + 0x100);
> > + armlinux_set_architecture(MACH_TYPE_MINI2440);
> > +
> > + return 0;
> > +}
>
> We need some kind of management here, because the mini2440 comes with NOR and
> NAND flash. And both can be configured to boot the system from: We need a
> location to store the environment. Maybe in NOR, when booting from NOR, and
> in NAND, when booting form NAND? Or only one single location where to store
> the environment, independent from the boot source? Ideas?
I like the idea to store in the boot media
Best Regards,
J.
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