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[SPARC64]: More sensible udelay implementation.

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Take a page from the powerpc folks and just calculate the
delay factor directly.

Since frequency scaling chips use a system-tick register,
the value is going to be the same system-wide.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2007-07-14 02:23:37 -07:00
parent 27a2ef382c
commit 8b99cfb8cc
10 changed files with 31 additions and 125 deletions
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24
arch/sparc64/kernel/smp.c
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@@ -49,9 +49,6 @@ extern void calibrate_delay(void);
int sparc64_multi_core __read_mostly;
/* Please don't make this stuff initdata!!! --DaveM */
unsigned char boot_cpu_id;
cpumask_t cpu_possible_map __read_mostly = CPU_MASK_NONE;
cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE;
cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly =
@@ -82,10 +79,7 @@ void smp_bogo(struct seq_file *m)
for_each_online_cpu(i)
seq_printf(m,
"Cpu%dBogo\t: %lu.%02lu\n"
"Cpu%dClkTck\t: %016lx\n",
i, cpu_data(i).udelay_val / (500000/HZ),
(cpu_data(i).udelay_val / (5000/HZ)) % 100,
i, cpu_data(i).clock_tick);
}
@@ -112,8 +106,6 @@ void __devinit smp_callin(void)
local_irq_enable();
calibrate_delay();
cpu_data(cpuid).udelay_val = loops_per_jiffy;
callin_flag = 1;
__asm__ __volatile__("membar #Sync\n\t"
"flush %%g6" : : : "memory");
@@ -1231,11 +1223,6 @@ void smp_penguin_jailcell(int irq, struct pt_regs *regs)
preempt_enable();
}
void __init smp_tick_init(void)
{
boot_cpu_id = hard_smp_processor_id();
}
/* /proc/profile writes can call this, don't __init it please. */
int setup_profiling_timer(unsigned int multiplier)
{
@@ -1244,7 +1231,6 @@ int setup_profiling_timer(unsigned int multiplier)
void __init smp_prepare_cpus(unsigned int max_cpus)
{
cpu_data(boot_cpu_id).udelay_val = loops_per_jiffy;
}
void __devinit smp_prepare_boot_cpu(void)
@@ -1323,16 +1309,6 @@ void __cpu_die(unsigned int cpu)
void __init smp_cpus_done(unsigned int max_cpus)
{
unsigned long bogosum = 0;
int i;
for_each_online_cpu(i)
bogosum += cpu_data(i).udelay_val;
printk("Total of %ld processors activated "
"(%lu.%02lu BogoMIPS).\n",
(long) num_online_cpus(),
bogosum/(500000/HZ),
(bogosum/(5000/HZ))%100);
}
void smp_send_reschedule(int cpu)