On Thu, Jan 24, 2002 at 04:25:59PM +0100, Anoulak Kictiraz wrote:
> I'm trying to port linux into Roger-Board, but i don't know why linux not
> booting on this board.would somebody help me with some hints and tips about
> porting ?.
> I'm using linux 2.4.17 kernel with patch 2.4.17-rmk3. The Roger-board have
> following feature:
> SA1110 cpu stepping 4
> 64 MB SDRAM samsung
> 32 MB StrataFlash memory (2 * 28F128J3A,with 16 bit data width, on modules
> with one flash memory bank)
> JTag Interface
> LCD Hitachi
> 3 Serial Ports
> ....
> I have port the bootloader blob-2.0.5-pre2 on the Roger and it works
> fein!(i think),
I'm always willing to include your port in the current blob CVS tree.
> it can download kernel and ramdisk images, than write to
> flash memory. when i give the kommand "boot", i see following messages on
> the console and the system hang up:
>
> Starting kernel ...
>
> Uncompressing Linux........................... done, booting the kernel.
>
>
> I have copy the file nanoengine.c to roger.c and modified the code as
> follow:
>
> static void __init
> fixup_roger(struct machine_desc *desc, struct param_struct *params,
> char **cmdline, struct meminfo *mi)
> {
> SET_BANK( 0, 0xc0000000, 32*1024*1024 );
> SET_BANK( 1, 0xc8000000, 32*1024*1024 );
> mi->nr_banks = 2;
You don't need that, blob will tell the kernel about the memory setup.
> ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
> setup_ramdisk( 1, 0, 0, 8192 );
> setup_initrd( __phys_to_virt(0xc0800000), 4*1024*1024 );
> //setup_initrd(0xc0800000, 4*1024*1024 );
Same over here, blob will tell the kernel about the ramdisk.
> /* Get command line parameters passed from the loader (if any) */
> if( *((char*)0xc0000100) )
> *cmdline = ((char *)0xc0000100);
Ehm, that's not the way to do it, blob passes ATAG nodes to the kernel,
not a cmdline. This will fail.
> }
You actually don't need a fixup function at all because blob gives the
kernel all information it needs.
> static struct map_desc roger_io_desc[] __initdata = {
> /* virtual physical length domain r w c b */
> { 0xe8000000, 0x00000000, 0x02000000, DOMAIN_IO, 1, 1, 0, 0 }, /* Flash
> bank 0 */
> LAST_DESC
> };
>
> static void __init roger_map_io(void)
> {
> sa1100_map_io();
> iotable_init(roger_io_desc);
>
> sa1100_register_uart(0, 1);
> sa1100_register_uart(1, 2);
> sa1100_register_uart(2, 3);
> Ser1SDCR0 |= SDCR0_UART;
Already fixed up in blob.
> /* disable IRDA -- UART2 is used as a normal serial port */
> Ser2UTCR4=0;
> Ser2HSCR0 = 0;
Not necessary, UART2 defaults to RS232.
> }
>
> MACHINE_START(ROGER, "Roger SD")
> BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
> FIXUP(fixup_roger)
Remove the FIXUP() line and add:
BOOT_PARAMS(0xc0000100)
> MAPIO(roger_map_io)
> INITIRQ(sa1100_init_irq)
> MACHINE_END
> Memory map on Roger:
>
> 0x0000 0000 static bank select 0
Eh, so how does it boot? Isn't there flash at 0x00000000, or are you
using blob-chain?
> 0x0800 0000 module flash bank1
> 0x1000 0000 static bank select 2
> 0x8000 0000 peripheral control module registers
Standard SA11x0, already mapped.
> 0x9000 0000 system control module registers
Also mapped.
> 0xc000 0000 module SDRAM bank
Blob will take care of this.
>
> who can i configured true memory map and memory timing ?
> any ideas?
To compute the memory timings, there is a link to Intel's SDRAM
configurator on http://www.arm.linux.org.uk/developer/ .
Erik
--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty
of Information Technology and Systems, Delft University of Technology,
PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635
Fax: +31-15-2781843 Email: [EMAIL PROTECTED]
WWW: http://www-ict.its.tudelft.nl/~erik/
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