static inline void disable_cpu_irq(void *unused, int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem &= ~eirr_bit;
set_eiem(cpu_eiem);
smp_call_function(cpu_set_eiem, (void *) cpu_eiem, 1, 1);
}
static void enable_cpu_irq(void *unused, int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
mtctl(eirr_bit, 23); /* clear EIRR bit before unmasking */
cpu_eiem |= eirr_bit;
smp_call_function(cpu_set_eiem, (void *) cpu_eiem, 1, 1);
set_eiem(cpu_eiem);
}
void cpu_end_irq(unsigned int irq)
{
unsigned long mask = EIEM_MASK(irq);
int cpu = smp_processor_id();
/* set it in the eiems---it's no longer in process */
per_cpu(local_ack_eiem, cpu) |= mask;
/* enable the interrupt */
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
}
void cpu_eoi_irq(struct irq_data *d)
{
unsigned long mask = EIEM_MASK(d->irq);
int cpu = smp_processor_id();
per_cpu(local_ack_eiem, cpu) |= mask;
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
}
static inline void unmask_cpu_irq(void *unused, int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem |= eirr_bit;
/* NOTE: sending an IPI will cause do_cpu_irq_mask() to
** handle *any* unmasked pending interrupts.
** ie We don't need to check for pending interrupts here.
*/
smp_call_function(cpu_set_eiem, (void *) cpu_eiem, 1, 1);
set_eiem(cpu_eiem);
}
void cpu_ack_irq(unsigned int irq)
{
unsigned long mask = EIEM_MASK(irq);
int cpu = smp_processor_id();
/* Clear in EIEM so we can no longer process */
per_cpu(local_ack_eiem, cpu) &= ~mask;
/* disable the interrupt */
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
/* and now ack it */
mtctl(mask, 23);
}
void __init init_IRQ(void)
{
local_irq_disable(); /* PARANOID - should already be disabled */
mtctl(~0UL, 23); /* EIRR : clear all pending external intr */
claim_cpu_irqs();
#ifdef CONFIG_SMP
if (!cpu_eiem)
cpu_eiem = EIEM_MASK(IPI_IRQ) | EIEM_MASK(TIMER_IRQ);
#else
cpu_eiem = EIEM_MASK(TIMER_IRQ);
#endif
set_eiem(cpu_eiem); /* EIEM : enable all external intr */
}
/* ONLY called from entry.S:intr_extint() */
void do_cpu_irq_mask(struct pt_regs *regs)
{
struct pt_regs *old_regs;
unsigned long eirr_val;
int irq, cpu = smp_processor_id();
#ifdef CONFIG_SMP
struct irq_desc *desc;
cpumask_t dest;
#endif
old_regs = set_irq_regs(regs);
local_irq_disable();
irq_enter();
eirr_val = mfctl(23) & cpu_eiem & per_cpu(local_ack_eiem, cpu);
if (!eirr_val)
goto set_out;
irq = eirr_to_irq(eirr_val);
#ifdef CONFIG_SMP
desc = irq_to_desc(irq);
cpumask_copy(&dest, desc->irq_data.affinity);
if (irqd_is_per_cpu(&desc->irq_data) &&
!cpu_isset(smp_processor_id(), dest)) {
int cpu = first_cpu(dest);
printk(KERN_DEBUG "redirecting irq %d from CPU %d to %d\n",
irq, smp_processor_id(), cpu);
gsc_writel(irq + CPU_IRQ_BASE,
per_cpu(cpu_data, cpu).hpa);
goto set_out;
}
#endif
stack_overflow_check(regs);
#ifdef CONFIG_IRQSTACKS
execute_on_irq_stack(&generic_handle_irq, irq);
#else
generic_handle_irq(irq);
#endif /* CONFIG_IRQSTACKS */
out:
irq_exit();
set_irq_regs(old_regs);
return;
set_out:
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
goto out;
}
void __init init_IRQ(void)
{
local_irq_disable();
mtctl(~0UL, 23);
claim_cpu_irqs();
#ifdef CONFIG_SMP
if (!cpu_eiem)
cpu_eiem = EIEM_MASK(IPI_IRQ) | EIEM_MASK(TIMER_IRQ);
#else
cpu_eiem = EIEM_MASK(TIMER_IRQ);
#endif
set_eiem(cpu_eiem);
}
/*
* This routine handles various exception codes. It determines the address,
* and the problem, and then passes it off to one of the appropriate
* routines.
*/
void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long offset)
{
static spinlock_t terminate_lock = SPIN_LOCK_UNLOCKED;
set_eiem(0);
__cli();
spin_lock(&terminate_lock);
/* unlock the pdc lock if necessary */
pdc_emergency_unlock();
/* restart pdc console if necessary */
if (!console_drivers)
pdc_console_restart();
/* Not all switch paths will gutter the processor... */
switch(code){
case 1:
transfer_pim_to_trap_frame(regs);
break;
default:
/* Fall through */
break;
}
show_stack((unsigned long *)regs->gr[30]);
printk("\n");
printk(KERN_CRIT "%s: Code=%d regs=%p (Addr=" RFMT ")\n",
msg, code, regs, offset);
show_regs(regs);
spin_unlock(&terminate_lock);
/* put soft power button back under hardware control;
* if the user had pressed it once at any time, the
* system will shut down immediately right here. */
pdc_soft_power_button(0);
/* Gutter the processor... */
for(;;)
;
}
/* ONLY called from entry.S:intr_extint() */
void do_cpu_irq_mask(struct pt_regs *regs)
{
struct pt_regs *old_regs;
unsigned long eirr_val;
int irq, cpu = smp_processor_id();
#ifdef CONFIG_SMP
cpumask_t dest;
#endif
old_regs = set_irq_regs(regs);
local_irq_disable();
irq_enter();
eirr_val = mfctl(23) & cpu_eiem & per_cpu(local_ack_eiem, cpu);
if (!eirr_val)
goto set_out;
irq = eirr_to_irq(eirr_val);
#ifdef CONFIG_SMP
cpumask_copy(&dest, irq_desc[irq].affinity);
if (CHECK_IRQ_PER_CPU(irq_desc[irq].status) &&
!cpu_isset(smp_processor_id(), dest)) {
int cpu = first_cpu(dest);
printk(KERN_DEBUG "redirecting irq %d from CPU %d to %d\n",
irq, smp_processor_id(), cpu);
gsc_writel(irq + CPU_IRQ_BASE,
per_cpu(cpu_data, cpu).hpa);
goto set_out;
}
#endif
__do_IRQ(irq);
out:
irq_exit();
set_irq_regs(old_regs);
return;
set_out:
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
goto out;
}
static void cpu_set_eiem(void *info)
{
set_eiem((unsigned long) info);
}
