[U-Boot] [PATCH] microblaze: Add FDT support

[Michal Simek]

Arun Bhanu wrote:
> This patch adds FDT (flattened device tree) support to microblaze arch.
> 
> Tested with Linux arch/microblaze kernels with and without compiled in
> FDT on Xilinx ML506 board.
> 
> Signed-off-by: Arun Bhanu <arun at bhanu.net>

Applied.

Thanks,
Michal

> ---
>  arch/microblaze/lib/bootm.c |   39 ++++++++++++++++++++++++++++++++++-----
>  1 files changed, 34 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/microblaze/lib/bootm.c b/arch/microblaze/lib/bootm.c
> index bce4774..0c2c5e8 100644
> --- a/arch/microblaze/lib/bootm.c
> +++ b/arch/microblaze/lib/bootm.c
> @@ -35,22 +35,51 @@ DECLARE_GLOBAL_DATA_PTR;
>  int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
>  {
>  	/* First parameter is mapped to $r5 for kernel boot args */
> -	void	(*theKernel) (char *);
> +	void	(*theKernel) (char *, ulong, ulong);
>  	char	*commandline = getenv ("bootargs");
> +	ulong	rd_data_start, rd_data_end;
>  
>  	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
>  		return 1;
>  
> -	theKernel = (void (*)(char *))images->ep;
> +	int	ret;
> +
> +	char	*of_flat_tree = NULL;
> +#if defined(CONFIG_OF_LIBFDT)
> +	ulong	of_size = 0;
> +
> +	/* find flattened device tree */
> +	ret = boot_get_fdt (flag, argc, argv, images, &of_flat_tree, &of_size);
> +	if (ret)
> +		return 1;
> +#endif
> +
> +	theKernel = (void (*)(char *, ulong, ulong))images->ep;
> +
> +	/* find ramdisk */
> +	ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_MICROBLAZE,
> +			&rd_data_start, &rd_data_end);
> +	if (ret)
> +		return 1;
>  
>  	show_boot_progress (15);
>  
> +	if (!(ulong) of_flat_tree)
> +		of_flat_tree = simple_strtoul (argv[3], NULL, 16);
> +
>  #ifdef DEBUG
> -	printf ("## Transferring control to Linux (at address %08lx) ...\n",
> -		(ulong) theKernel);
> +	printf ("## Transferring control to Linux (at address 0x%08lx) " \
> +				"ramdisk 0x%08lx, FDT 0x%08lx...\n",
> +		(ulong) theKernel, rd_data_start, (ulong) of_flat_tree);
>  #endif
>  
> -	theKernel (commandline);
> +	/*
> +	 * Linux Kernel Parameters (passing device tree):
> +	 * r5: pointer to command line
> +	 * r6: pointer to ramdisk
> +	 * r7: pointer to the fdt, followed by the board info data
> +	 */
> +	theKernel (commandline, rd_data_start, (ulong) of_flat_tree);
>  	/* does not return */
>  
>  	return 1;


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian