{
struct cache_desc *cd = ¤t_cpu_data.scache;
unsigned long cachesize; /* kB */
- unsigned long bandwidth = 350; /* MB/s */
unsigned long cpu_khz;
/*
*/
asmlinkage void start_secondary(void)
{
- unsigned int cpu = smp_processor_id();
+ unsigned int cpu;
cpu_probe();
cpu_report();
*/
calibrate_delay();
+ preempt_disable();
+ cpu = smp_processor_id();
cpu_data[cpu].udelay_val = loops_per_jiffy;
prom_smp_finish();
int i, cpus = num_online_cpus() - 1;
int cpu = smp_processor_id();
+ /*
+ * Can die spectacularly if this CPU isn't yet marked online
+ */
+ BUG_ON(!cpu_online(cpu));
+
if (!cpus)
return 0;
/* called from main before smp_init() */
void __init smp_prepare_cpus(unsigned int max_cpus)
{
- cpu_data[0].udelay_val = loops_per_jiffy;
init_new_context(current, &init_mm);
current_thread_info()->cpu = 0;
smp_tune_scheduling();
}
/*
- * Startup the CPU with this logical number
+ * Called once for each "cpu_possible(cpu)". Needs to spin up the cpu
+ * and keep control until "cpu_online(cpu)" is set. Note: cpu is
+ * physical, not logical.
*/
-static int __init do_boot_cpu(int cpu)
+int __devinit __cpu_up(unsigned int cpu)
{
struct task_struct *idle;
/*
+ * Processor goes to start_secondary(), sets online flag
* The following code is purely to make sure
* Linux can schedule processes on this slave.
*/
idle = fork_idle(cpu);
if (IS_ERR(idle))
- panic("failed fork for CPU %d\n", cpu);
+ panic(KERN_ERR "Fork failed for CPU %d", cpu);
prom_boot_secondary(cpu, idle);
- /* XXXKW timeout */
+ /*
+ * Trust is futile. We should really have timeouts ...
+ */
while (!cpu_isset(cpu, cpu_callin_map))
udelay(100);
return 0;
}
-/*
- * Called once for each "cpu_possible(cpu)". Needs to spin up the cpu
- * and keep control until "cpu_online(cpu)" is set. Note: cpu is
- * physical, not logical.
- */
-int __devinit __cpu_up(unsigned int cpu)
-{
- int ret;
-
- /* Processor goes to start_secondary(), sets online flag */
- ret = do_boot_cpu(cpu);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
/* Not really SMP stuff ... */
int setup_profiling_timer(unsigned int multiplier)
{