[U-Boot] [PATCH v1] ppc: Fix ppc4xx CONFIG_SYS_GENERIC_BOARD

[Stefan Roese <sr@denx.de>]

On 03.11.2014 10:56, dirk.eibach at gdsys.cc wrote:
> From: Dirk Eibach <dirk.eibach@gdsys.cc>
>
> I realized that with v2014.10 u-boot is not starting up on
> ppc4xx boards with CONFIG_SYS_GENERIC_BOARD set.
>
> I bisected it down to this:
> d54d7eb support blackfin board initialization in generic board_f
>
> With
> d29437a ppc: Make ppc4xx ready for CONFIG_SYS_GENERIC_BOARD
> I set gd to a defined value for ppc4xx in cpu_init_f().
> I did not realize that the gd struct has also to be memset()
> to zero at this point.
>
> But at least commit d54d7eb assumes it is:
> @@ -516,11 +528,13 @@ static int reserve_malloc(void)
>   /* (permanently) allocate a Board Info struct */
>   static int reserve_board(void)
>   {
> -	gd->start_addr_sp -= sizeof(bd_t);
> -	gd->bd = (bd_t *)map_sysmem(gd->start_addr_sp, sizeof(bd_t));
> -	memset(gd->bd, '\0', sizeof(bd_t));
> -	debug("Reserving %zu Bytes for Board Info at: %08lx\n",
> -			sizeof(bd_t), gd->start_addr_sp);
> +	if (!gd->bd) {
> +		gd->start_addr_sp -= sizeof(bd_t);
> +		gd->bd = (bd_t *)map_sysmem(gd->start_addr_sp, sizeof(bd_t));
> +		memset(gd->bd, '\0', sizeof(bd_t));
> +		debug("Reserving %zu Bytes for Board Info at: %08lx\n",
> +		      sizeof(bd_t), gd->start_addr_sp);
> +	}
>   	return 0;
>   }
>   #endif
>
> This might also be an issue on other architectures, so maintainers should
> check.

Thanks Dirk for fixing this on ppc4xx. Applied to u-boot-ppc4xx/master.

Thanks,
Stefan