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Diffstat (limited to 'arch/mips/loongson/common/env.c')
-rw-r--r--arch/mips/loongson/common/env.c29
1 files changed, 23 insertions, 6 deletions
diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c
index 196d947d929a..ae4cff97a56c 100644
--- a/arch/mips/loongson/common/env.c
+++ b/arch/mips/loongson/common/env.c
@@ -9,8 +9,8 @@
* 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
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzhangjin@gmail.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
@@ -23,13 +23,10 @@
#include <loongson.h>
-unsigned long bus_clock, cpu_clock_freq;
+unsigned long cpu_clock_freq;
EXPORT_SYMBOL(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) \
@@ -39,6 +36,10 @@ do { \
void __init prom_init_env(void)
{
+ /* pmon passes arguments in 32bit pointers */
+ int *_prom_envp;
+ unsigned long bus_clock;
+ unsigned int processor_id;
long l;
/* firmware arguments are initialized in head.S */
@@ -55,6 +56,22 @@ void __init prom_init_env(void)
}
if (memsize == 0)
memsize = 256;
+ if (bus_clock == 0)
+ bus_clock = 66000000;
+ if (cpu_clock_freq == 0) {
+ processor_id = (&current_cpu_data)->processor_id;
+ switch (processor_id & PRID_REV_MASK) {
+ case PRID_REV_LOONGSON2E:
+ cpu_clock_freq = 533080000;
+ break;
+ case PRID_REV_LOONGSON2F:
+ cpu_clock_freq = 797000000;
+ break;
+ default:
+ cpu_clock_freq = 100000000;
+ break;
+ }
+ }
pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
bus_clock, cpu_clock_freq, memsize, highmemsize);