Re: [microblaze-uclinux] Root file system on CF card questions...

[Claudio Lanconelli <lanconelli.claudio@xxxxxxxxx>]

Mike Thompson wrote:
> 2. I created my own simple boot loader than runs in the FPGA BRAM to 
> copy the uClinux image.bin file from the CF card in to DDR memory to 
> run.  How would I go about passing in the kernel command line when I 
> first jump to the kernel from my bootloader to specify an alternate 
> root filesystem and device?
Hi Mike,
look at this example:

typedef void (*void_fn)(char *);

//Kernel command line
static char *cmdline = "root=/dev/mtdblock0 rootfstype=romfs console=ttyS0";

static void uclinux_jump(unsigned long start_address)
{
   void_fn kernel_start;

   kernel_start = (void_fn)start_address;
   xil_printf("Jumping to kernel startup... (%08lx)\r\n", start_address);
   (*kernel_start)(cmdline);        // Never returns
   print("ERROR! Kernel returned\r\n");
}

Cheers,
Claudio Lanconelli
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