int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
preset_lpj = loops_per_jiffy;
if (per_cpu(cold_boot_done, cpu) == false) {
if (msm8625_release_secondary(cpu)) {
pr_err("Failed to release core %u\n", cpu);
return -ENODEV;
}
per_cpu(cold_boot_done, cpu) = true;
}
spin_lock(&boot_lock);
write_pen_release(cpu);
if (per_cpu(power_collapsed, cpu)) {
gic_configure_and_raise(cpu_data[cpu].ipc_irq, cpu);
raise_clear_spi(cpu, true);
} else {
gic_raise_softirq(cpumask_of(cpu), 1);
}
timeout = jiffies + (1 * HZ);
while (time_before(jiffies, timeout)) {
smp_rmb();
if (pen_release == -1)
break;
udelay(10);
}
spin_unlock(&boot_lock);
return 0;
}
int __cpuinit msm8625_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
preset_lpj = loops_per_jiffy;
if (per_cpu(cold_boot_done, cpu) == false) {
if (msm8625_release_secondary(cpu)) {
pr_err("Failed to release core %u\n", cpu);
return -ENODEV;
}
per_cpu(cold_boot_done, cpu) = true;
}
/*
* Set synchronisation state between this boot processor
* and the secondary one
*/
spin_lock(&boot_lock);
/*
* This is really belt and braces; we hold unintended secondary
* CPUs in the holding pen until we're ready for them. However,
* since we haven't sent them a soft interrupt, they shouldn't
* be there.
*/
write_pen_release(cpu);
/*
* Send the secondary CPU a soft interrupt, thereby causing
* the boot monitor to read the system wide flags register,
* and branch to the address found there.
*
* power_collapsed is the flag which will be updated for Powercollapse.
* Once we are out of PC, as secondary cores will be in the state of
* GDFS which needs to be brought out by raising an SPI.
*/
if (per_cpu(power_collapsed, cpu)) {
gic_configure_and_raise(cpu_data[cpu].ipc_irq, cpu);
raise_clear_spi(cpu, true);
} else {
gic_raise_softirq(cpumask_of(cpu), 1);
}
timeout = jiffies + (1 * HZ);
while (time_before(jiffies, timeout)) {
smp_rmb();
if (pen_release == -1)
break;
udelay(10);
}
/*
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
spin_unlock(&boot_lock);
return 0;
}