Changes:
o Move bus_clock into prom_init_env()
o Initialize the cpu_clock_freq to the default values for the
correspoding processor revisions if no such environment variable
passed by BIOS/Bootloader.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/826/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
extern void mach_prepare_shutdown(void);
/* environment arguments from bootloader */
extern void mach_prepare_shutdown(void);
/* environment arguments from bootloader */
-extern unsigned long bus_clock, cpu_clock_freq;
+extern unsigned long cpu_clock_freq;
extern unsigned long memsize, highmemsize;
/* loongson-specific command line, env and memory initialization */
extern unsigned long memsize, highmemsize;
/* loongson-specific command line, env and memory initialization */
-unsigned long bus_clock, cpu_clock_freq;
+unsigned long cpu_clock_freq;
EXPORT_SYMBOL(cpu_clock_freq);
unsigned long memsize, highmemsize;
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) \
#define parse_even_earlier(res, option, p) \
do { \
if (strncmp(option, (char *)p, strlen(option)) == 0) \
void __init prom_init_env(void)
{
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 */
long l;
/* firmware arguments are initialized in head.S */
}
if (memsize == 0)
memsize = 256;
}
if (memsize == 0)
memsize = 256;
+ if (bus_clock == 0)
+ bus_clock = 66000000;
+ if (cpu_clock_freq == 0) {
+ processor_id = (¤t_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);
pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
bus_clock, cpu_clock_freq, memsize, highmemsize);