[U-Boot] [PATCH] nios2: pass command line and initrd to linux in bootm.c

[Scott McNutt <smcnutt@psyent.com>]

Thomas,

Applied.

Theank you,
--Scott

Thomas Chou wrote:
> This patch adds bootargs passing to nios2 linux.
> 
> The args passing is enabled with,
> r4 : 'NIOS' magic
> r5 : pointer to initrd start
> r6 : pointer to initrd end
> r7 : pointer to command line
> 
> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
> ---
>  lib_nios2/bootm.c |   19 ++++++++++++-------
>  1 files changed, 12 insertions(+), 7 deletions(-)
> 
> diff --git a/lib_nios2/bootm.c b/lib_nios2/bootm.c
> index 675bfac..5d25edf 100644
> --- a/lib_nios2/bootm.c
> +++ b/lib_nios2/bootm.c
> @@ -26,21 +26,26 @@
>  #include <asm/byteorder.h>
>  #include <asm/cache.h>
>  
> +#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
> +
>  int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
>  {
> -	void (*kernel)(void) = (void (*)(void))images->ep;
> +	void (*kernel)(int, int, int, char *) = (void *)images->ep;
> +	char *commandline = getenv("bootargs");
> +	ulong initrd_start = images->rd_start;
> +	ulong initrd_end = images->rd_end;
>  
>  	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
>  		return 1;
>  
>  	/* flushes data and instruction caches before calling the kernel */
> -	flush_dcache (0,CONFIG_SYS_DCACHE_SIZE);
> -	flush_icache (0,CONFIG_SYS_ICACHE_SIZE);
> +	disable_interrupts();
> +	flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
> +	flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
>  
> -	/* For now we assume the Microtronix linux ... which only
> -	 * needs to be called ;-)
> -	 */
> -	kernel ();
> +	debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
> +	debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
> +	kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
>  	/* does not return */
>  
>  	return 1;