static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
{
*sun3_intreg |= (1 << irq);
if (!(kstat_cpu(0).irqs[irq] % 2000))
sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]);
return IRQ_HANDLED;
}
static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
{
sun3_do_irq(irq,fp);
if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 2000))
sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%16000)
/2000]);
return IRQ_HANDLED;
}
/*
* do_IRQ() handles all normal I/O device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*
*/
void __irq_entry do_IRQ(struct pt_regs *regs)
{
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
irq_enter();
__this_cpu_write(s390_idle.nohz_delay, 1);
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
/* Serve timer interrupts first. */
clock_comparator_work();
/*
* Get interrupt information from lowcore
*/
tpi_info = (struct tpi_info *)&S390_lowcore.subchannel_id;
irb = (struct irb *)&S390_lowcore.irb;
do {
kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++;
if (tpi_info->adapter_IO) {
do_adapter_IO(tpi_info->isc);
continue;
}
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch) {
/* Clear pending interrupt condition. */
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
tsch(tpi_info->schid, irb);
continue;
}
spin_lock(sch->lock);
/* Store interrupt response block to lowcore. */
if (tsch(tpi_info->schid, irb) == 0) {
/* Keep subchannel information word up to date. */
memcpy (&sch->schib.scsw, &irb->scsw,
sizeof (irb->scsw));
/* Call interrupt handler if there is one. */
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
} else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
spin_unlock(sch->lock);
/*
* Are more interrupts pending?
* If so, the tpi instruction will update the lowcore
* to hold the info for the next interrupt.
* We don't do this for VM because a tpi drops the cpu
* out of the sie which costs more cycles than it saves.
*/
} while (MACHINE_IS_LPAR && tpi(NULL) != 0);
irq_exit();
set_irq_regs(old_regs);
}
static void measure_cpu(void)
{
int i;
PDEBUG("cpu_probe: start.\n");
for(i=0; i<num_online_cpus(); i++) {
cpu_used[i] =
cputime64_to_clock_t(kstat_cpu(i).cpustat.user) +
cputime64_to_clock_t(kstat_cpu(i).cpustat.nice) +
cputime64_to_clock_t(kstat_cpu(i).cpustat.system) +
cputime64_to_clock_t(kstat_cpu(i).cpustat.iowait) +
cputime64_to_clock_t(kstat_cpu(i).cpustat.irq) +
cputime64_to_clock_t(kstat_cpu(i).cpustat.softirq) +
cputime64_to_clock_t(kstat_cpu(i).cpustat.steal);
cpu_total[i] = cpu_used[i] +
cputime64_to_clock_t(kstat_cpu(i).cpustat.idle);
//spin_lock( &(probe_data[i].lock) );
probe_data[i].cpu_used = cpu_used[i] - cpu_used_prev[i];
probe_data[i].cpu_total = cpu_total[i] - cpu_total_prev[i];
//spin_unlock( &(probe_data[i].lock) );
PDEBUG("measurements for CPU%d: used=%llu total=%llu\n",
i, (unsigned long long)cpu_used[i],
(unsigned long long)cpu_total[i]);
cpu_used_prev[i] = cpu_used[i];
cpu_total_prev[i] = cpu_total[i];
}
PDEBUG("cpu_probe: done\n.");
}
static irqreturn_t sun3_int5(int irq, void *dev_id)
{
#ifdef CONFIG_SUN3
intersil_clear();
#endif
*sun3_intreg |= (1 << irq);
#ifdef CONFIG_SUN3
intersil_clear();
#endif
xtime_update(1);
update_process_times(user_mode(get_irq_regs()));
if (!(kstat_cpu(0).irqs[irq] % 20))
sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
return IRQ_HANDLED;
}
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0) {
seq_printf(p, " ");
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto skip;
seq_printf(p, "%3d: ",i);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].chip->typename);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS)
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0) {
seq_puts(p, " ");
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
if (i < sh_mv.mv_nr_irqs) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto unlock;
seq_printf(p, "%3d: ",i);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, "-%-8s", irq_desc[i].name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
unlock:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == sh_mv.mv_nr_irqs)
seq_printf(p, "Err: %10u\n", atomic_read(&irq_err_count));
return 0;
}
/*
* Level-based IRQ handler. Nice and simple.
*/
void
do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
struct irqaction *action;
const int cpu = smp_processor_id();
desc->triggered = 1;
/*
* Acknowledge, clear _AND_ disable the interrupt.
*/
desc->chip->ack(irq);
if (likely(desc->enabled)) {
kstat_cpu(cpu).irqs[irq]++;
/*
* Return with this interrupt masked if no action
*/
action = desc->action;
if (action) {
__do_irq(irq, desc->action, regs);
if (likely(desc->enabled &&
!check_irq_lock(desc, irq, regs)))
desc->chip->unmask(irq);
}
}
}
static int uptime_proc_show(struct seq_file *m, void *v)
{
struct timespec calc_uptime;
struct timespec calc_idle;
int i;
cputime_t calc_idletime = cputime_zero;
if (!uptime)
{
do_posix_clock_monotonic_gettime(&calc_uptime);
monotonic_to_bootbased(&calc_uptime);
for_each_possible_cpu(i)
calc_idletime += cputime64_add(calc_idletime, kstat_cpu(i).cpustat.idle);
cputime_to_timespec(calc_idletime, &calc_idle);
}
else
{
calc_uptime.tv_sec = uptime * HZ + jiffies - startjiffies;
calc_uptime.tv_nsec = 0;
calc_idle.tv_sec = idletime * HZ + jiffies - startjiffies;
calc_idle.tv_nsec = 0;
}
seq_printf(m, "%lu.%02lu %lu.%02lu\n",
(unsigned long) calc_uptime.tv_sec,
(calc_uptime.tv_nsec / (NSEC_PER_SEC / 100)),
(unsigned long) calc_idle.tv_sec,
(calc_idle.tv_nsec / (NSEC_PER_SEC / 100)));
return 0;
}
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v;
struct irqaction * action;
unsigned long flags;
if (i < NR_IRQS) {
local_irq_save(flags);
action = irq_action[i];
if (!action)
goto skip;
seq_printf(p, "%2d: %10u %c %s",
i, kstat_cpu(0).irqs[i],
(action->flags & SA_INTERRUPT) ? '+' : ' ',
action->name);
for (action = action->next; action; action = action->next) {
seq_printf(p, ",%s %s",
(action->flags & SA_INTERRUPT) ? " +" : "",
action->name);
}
seq_putc(p, '\n');
skip:
local_irq_restore(flags);
}
return 0;
}
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0)
seq_puts(p, " CPU0");
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto unlock;
seq_printf(p, "%3d: ",i);
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, "-%-8s", irq_desc[i].name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
unlock:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
}
return 0;
}
/* The 68k family did not have a good way to determine the source
* of interrupts until later in the family. The EC000 core does
* not provide the vector number on the stack, we vector everything
* into one vector and look in the blasted mask register...
* This code is designed to be fast, almost constant time, not clean!
*/
void process_int(int vec, struct pt_regs *fp)
{
int irq;
int mask;
/* unsigned long pend = *(volatile unsigned long *)0xfffff30c; */
/* irq = vec + (CPM_VECTOR_BASE<<4); */
irq = vec;
/* unsigned long pend = *(volatile unsigned long *)pquicc->intr_cipr; */
/* Bugger all that weirdness. For the moment, I seem to know where I came from;
* vec is passed from a specific ISR, so I'll use it. */
if (int_irq_list[irq].handler) {
int_irq_list[irq].handler(irq , int_irq_list[irq].dev_id, fp);
kstat_cpu(0).irqs[irq]++;
pquicc->intr_cisr = (1 << vec); /* indicate that irq has been serviced */
} else {
printk(KERN_ERR "unregistered interrupt %d!\nTurning it off in the CIMR...\n", irq);
/* *(volatile unsigned long *)0xfffff304 |= mask; */
pquicc->intr_cimr &= ~(1 << vec);
num_spurious += 1;
}
return(IRQ_HANDLED);
}
static void dump_irqs(void)
{
int n;
dprintf("irqnr total since-last status name\n");
for (n = 1; n < NR_IRQS; n++) {
struct irqaction *act = irq_desc[n].action;
if (!act && !kstat_cpu(0).irqs[n])
continue;
dprintf("%5d: %10u %11u %8x %s\n", n,
kstat_cpu(0).irqs[n],
kstat_cpu(0).irqs[n] - last_irqs[n],
irq_desc[n].status,
(act && act->name) ? act->name : "???");
last_irqs[n] = kstat_cpu(0).irqs[n];
}
}
void mac_do_irq_list(int irq, struct pt_regs *fp)
{
irq_node_t *node, *slow_nodes;
unsigned long flags;
kstat_cpu(0).irqs[irq]++;
#ifdef DEBUG_SPURIOUS
if (!mac_irq_list[irq] && (console_loglevel > 7)) {
printk("mac_do_irq_list: spurious interrupt %d!\n", irq);
return;
}
#endif
/* serve first fast and normal handlers */
for (node = mac_irq_list[irq];
node && (!(node->flags & IRQ_FLG_SLOW));
node = node->next)
node->handler(irq, node->dev_id, fp);
if (!node) return;
local_save_flags(flags);
local_irq_restore((flags & ~0x0700) | (fp->sr & 0x0700));
/* if slow handlers exists, serve them now */
slow_nodes = node;
for (; node; node = node->next) {
node->handler(irq, node->dev_id, fp);
}
}
/**
* handle_simple_irq - Simple and software-decoded IRQs.
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
*
* Simple interrupts are either sent from a demultiplexing interrupt
* handler or come from hardware, where no interrupt hardware control
* is necessary.
*
* Note: The caller is expected to handle the ack, clear, mask and
* unmask issues if necessary.
*/
void fastcall
handle_simple_irq(unsigned int irq, struct irq_desc *desc)
{
struct irqaction *action;
irqreturn_t action_ret;
const unsigned int cpu = smp_processor_id();
spin_lock(&desc->lock);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
kstat_cpu(cpu).irqs[irq]++;
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
if (desc->chip->mask)
desc->chip->mask(irq);
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
desc->status |= IRQ_PENDING;
goto out_unlock;
}
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING | IRQ_PENDING);
desc->status |= IRQ_INPROGRESS;
spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out_unlock:
spin_unlock(&desc->lock);
}
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *)v, cpu;
struct irqaction *action;
unsigned long flags;
if (i == 0) {
seq_puts(p, " ");
for_each_online_cpu(cpu)
seq_printf(p, "CPU%d ", cpu);
seq_putc(p, '\n');
}
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto unlock;
seq_printf(p, "%3d: ", i);
for_each_online_cpu(cpu)
seq_printf(p, "%10u ", kstat_cpu(cpu).irqs[i]);
seq_printf(p, " %8s", irq_desc[i].chip->name ? : "-");
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
unlock:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
}
/*
* Use cio_tsch to update the subchannel status and call the interrupt handler
* if status had been pending. Called with the console_subchannel lock.
*/
static void cio_tsch(struct subchannel *sch)
{
struct irb *irb;
int irq_context;
irb = (struct irb *)&S390_lowcore.irb;
/* Store interrupt response block to lowcore. */
if (tsch(sch->schid, irb) != 0)
/* Not status pending or not operational. */
return;
memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
/* Call interrupt handler with updated status. */
irq_context = in_interrupt();
if (!irq_context) {
local_bh_disable();
irq_enter();
}
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
if (!irq_context) {
irq_exit();
_local_bh_enable();
}
}
/*
* Most edge-triggered IRQ implementations seem to take a broken
* approach to this. Hence the complexity.
*/
void
do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
const int cpu = smp_processor_id();
desc->triggered = 1;
/*
* If we're currently running this IRQ, or its disabled,
* we shouldn't process the IRQ. Instead, turn on the
* hardware masks.
*/
if (unlikely(desc->running || !desc->enabled))
goto running;
/*
* Acknowledge and clear the IRQ, but don't mask it.
*/
desc->chip->ack(irq);
/*
* Mark the IRQ currently in progress.
*/
desc->running = 1;
kstat_cpu(cpu).irqs[irq]++;
do {
struct irqaction *action;
action = desc->action;
if (!action)
break;
if (desc->pending && desc->enabled) {
desc->pending = 0;
desc->chip->unmask(irq);
}
__do_irq(irq, action, regs);
} while (desc->pending);
desc->running = 0;
/*
* If we were disabled or freed, shut down the handler.
*/
if (likely(desc->action && !check_irq_lock(desc, irq, regs)))
return;
running:
/*
* We got another IRQ while this one was masked or
* currently running. Delay it.
*/
desc->pending = 1;
desc->chip->mask(irq);
desc->chip->ack(irq);
}
static void clock_comparator_interrupt(struct ext_code ext_code,
unsigned int param32,
unsigned long param64)
{
kstat_cpu(smp_processor_id()).irqs[EXTINT_CLK]++;
if (S390_lowcore.clock_comparator == -1ULL)
set_clock_comparator(S390_lowcore.clock_comparator);
}
void __irq_entry do_IRQ(struct pt_regs *regs)
{
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
irq_enter();
__this_cpu_write(s390_idle.nohz_delay, 1);
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
clock_comparator_work();
tpi_info = (struct tpi_info *)&S390_lowcore.subchannel_id;
irb = (struct irb *)&S390_lowcore.irb;
do {
kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++;
if (tpi_info->adapter_IO) {
do_adapter_IO(tpi_info->isc);
continue;
}
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch) {
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
tsch(tpi_info->schid, irb);
continue;
}
spin_lock(sch->lock);
if (tsch(tpi_info->schid, irb) == 0) {
memcpy (&sch->schib.scsw, &irb->scsw,
sizeof (irb->scsw));
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
} else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
spin_unlock(sch->lock);
} while (MACHINE_IS_LPAR && tpi(NULL) != 0);
irq_exit();
set_irq_regs(old_regs);
}
static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
{
kstat_cpu(0).irqs[SYS_IRQS + irq]++;
#ifdef CONFIG_SUN3
intersil_clear();
#endif
*sun3_intreg &= ~(1<<irq);
*sun3_intreg |= (1<<irq);
#ifdef CONFIG_SUN3
intersil_clear();
#endif
do_timer(fp);
if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 20))
sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%160)
/20]);
return IRQ_HANDLED;
}
inline void amiga_do_irq(int irq, struct pt_regs *fp)
{
irq_desc_t *desc = irq_desc + irq;
struct irqaction *action = desc->action;
kstat_cpu(0).irqs[irq]++;
action->handler(irq, action->dev_id, fp);
}
static void rtc_sync_work_handler(struct work_struct * __unused)
{
static unsigned int old_idle_tick, busy_count;
int next_interval;
int cpu_idle;
if (rtc_sync_state == RS_SAVE_DELTA)
{
rtc_sync_save_delta();
rtc_sync_start();
return;
}
switch (rtc_sync_state)
{
case RS_WAIT_ADJUST_TIME:
/* start adjust service */
busy_count = 0;
case RS_WAIT_ADJUST_TIME_AFTER_BUSY:
/* prepare detect cpu idle */
old_idle_tick = kstat_cpu(0).cpustat.idle + kstat_cpu(0).cpustat.iowait;
rtc_sync_state = RS_DETECT_IDLE;
next_interval = RTC_SYNC_DETECT_IDLE_INTERVAL;
break;
case RS_DETECT_IDLE:
cpu_idle = detect_cpu_idle(old_idle_tick);
/* when cpu idle or passing the adjust force time */
if (cpu_idle || ++busy_count > RTC_SYNC_MAX_BUSY_COUNT)
{
rtc_sync_state = RS_TRY_ADJUST;
rtc_sync_adjust();
rtc_sync_state = RS_WAIT_ADJUST_TIME;
next_interval = RTC_SYNC_ADJUST_INTERVAL;
}
else
{
rtc_sync_state = RS_WAIT_ADJUST_TIME_AFTER_BUSY;
next_interval = RTC_SYNC_AFTER_BUSY_INTERVAL;
}
break;
default:
return;
}
schedule_delayed_work(&rtc_sync_work, next_interval);
}
static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
{
#ifdef CONFIG_SUN3
intersil_clear();
#endif
*sun3_intreg |= (1 << irq);
#ifdef CONFIG_SUN3
intersil_clear();
#endif
do_timer(fp);
#ifndef CONFIG_SMP
update_process_times(user_mode(fp));
#endif
if (!(kstat_cpu(0).irqs[irq] % 20))
sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
return IRQ_HANDLED;
}
static void timing_alert_interrupt(struct ext_code ext_code,
unsigned int param32, unsigned long param64)
{
kstat_cpu(smp_processor_id()).irqs[EXTINT_TLA]++;
if (param32 & 0x00c40000)
etr_timing_alert((struct etr_irq_parm *) ¶m32);
if (param32 & 0x00038000)
stp_timing_alert((struct stp_irq_parm *) ¶m32);
}
/*
* do_IRQ() handles all normal I/O device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*
*/
void
do_IRQ (struct pt_regs *regs)
{
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
irq_enter();
s390_idle_check();
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
/* Serve timer interrupts first. */
clock_comparator_work();
/*
* Get interrupt information from lowcore
*/
tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID;
irb = (struct irb *) __LC_IRB;
do {
kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++;
/*
* Non I/O-subchannel thin interrupts are processed differently
*/
if (tpi_info->adapter_IO == 1 &&
tpi_info->int_type == IO_INTERRUPT_TYPE) {
do_adapter_IO(tpi_info->isc);
continue;
}
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch) {
/* Clear pending interrupt condition. */
tsch(tpi_info->schid, irb);
continue;
}
spin_lock(sch->lock);
/* Store interrupt response block to lowcore. */
if (tsch(tpi_info->schid, irb) == 0) {
/* Keep subchannel information word up to date. */
memcpy (&sch->schib.scsw, &irb->scsw,
sizeof (irb->scsw));
/* Call interrupt handler if there is one. */
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
}
spin_unlock(sch->lock);
/*
* Are more interrupts pending?
* If so, the tpi instruction will update the lowcore
* to hold the info for the next interrupt.
* We don't do this for VM because a tpi drops the cpu
* out of the sie which costs more cycles than it saves.
*/
} while (!MACHINE_IS_VM && tpi (NULL) != 0);
irq_exit();
set_irq_regs(old_regs);
}
static cputime64_t get_idle_time(int cpu)
{
cputime64_t idle;
idle = kstat_cpu(cpu).cpustat.idle;
if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
idle += arch_idle_time(cpu);
return idle;
}
static cputime64_t get_iowait_time(int cpu)
{
cputime64_t iowait;
iowait = kstat_cpu(cpu).cpustat.iowait;
if (cpu_online(cpu) && nr_iowait_cpu(cpu))
iowait += arch_idle_time(cpu);
return iowait;
}
static inline int detect_cpu_idle (unsigned int old_idle_tick)
{
unsigned int idle_tick = kstat_cpu(0).cpustat.idle + kstat_cpu(0).cpustat.iowait;
unsigned int unit_idle_tick = idle_tick - old_idle_tick;
int state = false;
old_idle_tick = idle_tick;
if ( unit_idle_tick > (RTC_SYNC_DETECT_IDLE_INTERVAL * RTC_SYNC_IDLE_PERCENT / 100))
{
state = true;
}
#ifdef CONFIG_RTC_S3C_SYNC_SYSTEM_TIME_DEBUG
printk ("RTC_SYNC: %s idle_tick:%d\n", (state == true)?"<idle>":"<busy>", unit_idle_tick);
#endif
return state;
}
/*
* Use cio_tpi to get a pending interrupt and call the interrupt handler.
* Return non-zero if an interrupt was processed, zero otherwise.
*/
static int cio_tpi(void)
{
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
int irq_context;
tpi_info = (struct tpi_info *)&S390_lowcore.subchannel_id;
if (tpi(NULL) != 1)
return 0;
kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++;
if (tpi_info->adapter_IO) {
do_adapter_IO(tpi_info->isc);
return 1;
}
irb = (struct irb *)&S390_lowcore.irb;
/* Store interrupt response block to lowcore. */
if (tsch(tpi_info->schid, irb) != 0) {
/* Not status pending or not operational. */
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
return 1;
}
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch) {
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
return 1;
}
irq_context = in_interrupt();
if (!irq_context)
local_bh_disable();
irq_enter();
spin_lock(sch->lock);
memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
spin_unlock(sch->lock);
irq_exit();
if (!irq_context)
_local_bh_enable();
return 1;
}
