1 files changed, 58 insertions, 0 deletions

diff --git a/arch/mips/loongson/fuloong-2e/env.c b/arch/mips/loongson/fuloong-2e/env.c
new file mode 100644
index 000000000000..b9ef50385541
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/env.c
@@ -0,0 +1,58 @@
+/*
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright 2003 ICT CAS
+ * Author: Michael Guo <guoyi@ict.ac.cn>
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+unsigned long bus_clock, cpu_clock_freq;
+unsigned long memsize, highmemsize;
+
+/* pmon passes arguments in 32bit pointers */
+int *_prom_envp;
+
+#define parse_even_earlier(res, option, p)                              \
+do {                                                                    \
+        if (strncmp(option, (char *)p, strlen(option)) == 0)            \
+                        strict_strtol((char *)p + strlen(option"="),    \
+                                        10, &res);                      \
+} while (0)
+
+void __init prom_init_env(void)
+{
+        long l;
+
+        /* firmware arguments are initialized in head.S */
+        _prom_envp = (int *)fw_arg2;
+
+        l = (long)*_prom_envp;
+        while (l != 0) {
+                parse_even_earlier(bus_clock, "busclock", l);
+                parse_even_earlier(cpu_clock_freq, "cpuclock", l);
+                parse_even_earlier(memsize, "memsize", l);
+                parse_even_earlier(highmemsize, "highmemsize", l);
+                _prom_envp++;
+                l = (long)*_prom_envp;
+        }
+        if (memsize == 0)
+                memsize = 256;
+
+        pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
+                bus_clock, cpu_clock_freq, memsize, highmemsize);
+}