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powerpc: Move some calculations from xxx_calibrate_decr to time_init 

Previously the individual xxx_calibrate_decr functions would each
print the timebase and cpu frequency and calculate several values
such as tb_to_us and tb_to_xs.  This moves those printks and
calculations into time_init just after the call to the platform's
calibrate_decr function.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras 2005-10-20 21:04:51 +10:00
parent 0458060c1c
commit 374e99d450
2 changed files with 14 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
arch/powerpc/kernel/time.c
View File

@ -548,11 +548,9 @@ int do_settimeofday(struct timespec *tv)
EXPORT_SYMBOL(do_settimeofday); EXPORT_SYMBOL(do_settimeofday);
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_MAPLE) || defined(CONFIG_PPC_BPA) || defined(CONFIG_PPC_ISERIES)
void __init generic_calibrate_decr(void) void __init generic_calibrate_decr(void)
{ {
struct device_node *cpu; struct device_node *cpu;
struct div_result divres;
unsigned int *fp; unsigned int *fp;
int node_found; int node_found;
@ -591,20 +589,7 @@ void __init generic_calibrate_decr(void)
"(not found)\n"); "(not found)\n");
of_node_put(cpu); of_node_put(cpu);
printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
ppc_tb_freq/1000000, ppc_tb_freq%1000000);
printk(KERN_INFO "time_init: processor frequency = %lu.%.6lu MHz\n",
ppc_proc_freq/1000000, ppc_proc_freq%1000000);
tb_ticks_per_jiffy = ppc_tb_freq / HZ;
tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
tb_ticks_per_usec = ppc_tb_freq / 1000000;
tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
div128_by_32(1024*1024, 0, tb_ticks_per_sec, &divres);
tb_to_xs = divres.result_low;
} }
#endif
unsigned long get_boot_time(void) unsigned long get_boot_time(void)
{ {
@ -633,6 +618,18 @@ void __init time_init(void)
ppc_md.calibrate_decr(); ppc_md.calibrate_decr();
printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
ppc_tb_freq / 1000000, ppc_tb_freq % 1000000);
printk(KERN_INFO "time_init: processor frequency = %lu.%.6lu MHz\n",
ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
tb_ticks_per_jiffy = ppc_tb_freq / HZ;
tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
tb_ticks_per_usec = ppc_tb_freq / 1000000;
tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
div128_by_32(1024*1024, 0, tb_ticks_per_sec, &res);
tb_to_xs = res.result_low;
#ifdef CONFIG_PPC64 #ifdef CONFIG_PPC64
get_paca()->default_decr = tb_ticks_per_jiffy; get_paca()->default_decr = tb_ticks_per_jiffy;
#endif #endif

14
arch/ppc64/kernel/pmac_time.c
View File

@ -152,8 +152,7 @@ unsigned long __init pmac_get_boot_time(void)
void __init pmac_calibrate_decr(void) void __init pmac_calibrate_decr(void)
{ {
struct device_node *cpu; struct device_node *cpu;
unsigned int freq, *fp; unsigned int *fp;
struct div_result divres;
/* /*
* The cpu node should have a timebase-frequency property * The cpu node should have a timebase-frequency property
@ -165,16 +164,7 @@ void __init pmac_calibrate_decr(void)
fp = (unsigned int *) get_property(cpu, "timebase-frequency", NULL); fp = (unsigned int *) get_property(cpu, "timebase-frequency", NULL);
if (fp == 0) if (fp == 0)
panic("can't get cpu timebase frequency"); panic("can't get cpu timebase frequency");
freq = *fp; ppc_tb_freq = *fp;
printk("time_init: decrementer frequency = %u.%.6u MHz\n",
freq/1000000, freq%1000000);
tb_ticks_per_jiffy = freq / HZ;
tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
tb_ticks_per_usec = freq / 1000000;
tb_to_us = mulhwu_scale_factor(freq, 1000000);
div128_by_32( 1024*1024, 0, tb_ticks_per_sec, &divres );
tb_to_xs = divres.result_low;
ppc_tb_freq = freq;
fp = (unsigned int *)get_property(cpu, "clock-frequency", NULL); fp = (unsigned int *)get_property(cpu, "clock-frequency", NULL);
if (fp == 0) if (fp == 0)