MIPS: ralink: adds prom and cmdline code

Add minimal code to handle commandlines.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4892/

diff --git a/arch/mips/ralink/prom.c b/arch/mips/ralink/prom.c
new file mode 100644 (file)
index 0000000..9c64f02
--- /dev/null
+++ b/arch/mips/ralink/prom.c
@@ -0,0 +1,69 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ *
+ *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
+ *  Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/string.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+
+#include "common.h"
+
+struct ralink_soc_info soc_info;
+
+const char *get_system_type(void)
+{
+       return soc_info.sys_type;
+}
+
+static __init void prom_init_cmdline(int argc, char **argv)
+{
+       int i;
+
+       pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
+              (unsigned int)fw_arg0, (unsigned int)fw_arg1,
+              (unsigned int)fw_arg2, (unsigned int)fw_arg3);
+
+       argc = fw_arg0;
+       argv = (char **) KSEG1ADDR(fw_arg1);
+
+       if (!argv) {
+               pr_debug("argv=%p is invalid, skipping\n",
+                      argv);
+               return;
+       }
+
+       for (i = 0; i < argc; i++) {
+               char *p = (char *) KSEG1ADDR(argv[i]);
+
+               if (CPHYSADDR(p) && *p) {
+                       pr_debug("argv[%d]: %s\n", i, p);
+                       strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+                       strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+               }
+       }
+}
+
+void __init prom_init(void)
+{
+       int argc;
+       char **argv;
+
+       prom_soc_init(&soc_info);
+
+       pr_info("SoC Type: %s\n", get_system_type());
+
+       prom_init_cmdline(argc, argv);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}