mips: add option to load initrd from a specified file

Use kexec's existing infrastrucutre for supporting initrd loading.
The initrd image is loaded into a buffer after the dtb and its details
passed through the device tree, so it's supported on newer platforms
that make use of the device tree passed from kexec.

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 4 insertions, 0 deletions

diff --git a/kexec/arch/mips/kexec-mips.c b/kexec/arch/mips/kexec-mips.c
index 2605c17..ee3cd3a 100644
--- a/kexec/arch/mips/kexec-mips.c
+++ b/kexec/arch/mips/kexec-mips.c
@@ -82,6 +82,7 @@ void arch_usage(void)
 	"    --command-line=STRING Set the kernel command line to STRING.\n"
 	"    --append=STRING       Set the kernel command line to STRING.\n"
 	"    --dtb=FILE            Use FILE as the device tree blob.\n"
+	"    --initrd=FILE         Use FILE as initial ramdisk.\n"
 	);
 }
 
@@ -111,6 +112,9 @@ int arch_process_options(int argc, char **argv)
 		case OPT_DTB:
 			arch_options.dtb_file = optarg;
 			break;
+		case OPT_RAMDISK:
+			arch_options.initrd_file = optarg;
+			break;
 		default:
 			break;
 		}