[MIPS] Implement clockevents for R4000-style cp0 count/compare interrupt
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0cd0f83..ecce3aa 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -335,6 +335,7 @@
select GENERIC_ISA_DMA
select HAVE_STD_PC_SERIAL_PORT
select I8259
+ select IRQ_CPU
select ISA
select PCSPEAKER
select SWAP_IO_SPACE
@@ -667,6 +668,10 @@
bool
default y
+config GENERIC_CLOCKEVENTS
+ bool
+ default y
+
config GENERIC_TIME
bool
default y
@@ -901,6 +906,8 @@
menu "CPU selection"
+source "kernel/time/Kconfig"
+
choice
prompt "CPU type"
default CPU_R4X00
diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c
index 47949d6..a6640b9 100644
--- a/arch/mips/au1000/common/irq.c
+++ b/arch/mips/au1000/common/irq.c
@@ -633,7 +633,7 @@
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & CAUSEF_IP7)
- ll_timer_interrupt(63);
+ do_IRQ(63);
else if (pending & CAUSEF_IP2)
intc0_req0_irqdispatch();
else if (pending & CAUSEF_IP3)
diff --git a/arch/mips/configs/bigsur_defconfig b/arch/mips/configs/bigsur_defconfig
index 700a3a2..30f3e9a 100644
--- a/arch/mips/configs/bigsur_defconfig
+++ b/arch/mips/configs/bigsur_defconfig
@@ -69,7 +69,6 @@
CONFIG_SIBYTE_CFE=y
# CONFIG_SIBYTE_CFE_CONSOLE is not set
# CONFIG_SIBYTE_BUS_WATCHER is not set
-# CONFIG_SIBYTE_SB1250_PROF is not set
# CONFIG_SIBYTE_TBPROF is not set
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
diff --git a/arch/mips/configs/sb1250-swarm_defconfig b/arch/mips/configs/sb1250-swarm_defconfig
index 93f9e83..3d1b628 100644
--- a/arch/mips/configs/sb1250-swarm_defconfig
+++ b/arch/mips/configs/sb1250-swarm_defconfig
@@ -70,7 +70,6 @@
CONFIG_SIBYTE_CFE=y
# CONFIG_SIBYTE_CFE_CONSOLE is not set
# CONFIG_SIBYTE_BUS_WATCHER is not set
-# CONFIG_SIBYTE_SB1250_PROF is not set
# CONFIG_SIBYTE_TBPROF is not set
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index aadd2cd..f99bb40 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -11,6 +11,7 @@
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/tick.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
@@ -52,6 +53,7 @@
{
/* endless idle loop with no priority at all */
while (1) {
+ tick_nohz_stop_sched_tick();
while (!need_resched()) {
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
extern void smtc_idle_loop_hook(void);
@@ -61,6 +63,7 @@
if (cpu_wait)
(*cpu_wait)();
}
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 73b0dab..500a7ec 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -38,6 +38,7 @@
#include <asm/system.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
+#include <asm/time.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/mipsmtregs.h>
@@ -70,6 +71,7 @@
cpu_probe();
cpu_report();
per_cpu_trap_init();
+ mips_clockevent_init();
prom_init_secondary();
/*
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index a7afbf2..137183b 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -867,7 +867,7 @@
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
clock_hang_reported[dest_copy] = 0;
#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
- local_timer_interrupt(0);
+ local_timer_interrupt(0, NULL);
irq_exit();
break;
case LINUX_SMP_IPI:
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index d23e682..3598884 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -11,6 +11,7 @@
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
+#include <linux/clockchips.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
@@ -34,6 +35,8 @@
#include <asm/sections.h>
#include <asm/time.h>
+#include <irq.h>
+
/*
* The integer part of the number of usecs per jiffy is taken from tick,
* but the fractional part is not recorded, so we calculate it using the
@@ -70,10 +73,6 @@
/* how many counter cycles in a jiffy */
static unsigned long cycles_per_jiffy __read_mostly;
-/* expirelo is the count value for next CPU timer interrupt */
-static unsigned int expirelo;
-
-
/*
* Null timer ack for systems not needing one (e.g. i8254).
*/
@@ -92,18 +91,7 @@
*/
static void c0_timer_ack(void)
{
- unsigned int count;
-
- /* Ack this timer interrupt and set the next one. */
- expirelo += cycles_per_jiffy;
- write_c0_compare(expirelo);
-
- /* Check to see if we have missed any timer interrupts. */
- while (((count = read_c0_count()) - expirelo) < 0x7fffffff) {
- /* missed_timer_count++; */
- expirelo = count + cycles_per_jiffy;
- write_c0_compare(expirelo);
- }
+ write_c0_compare(read_c0_compare());
}
/*
@@ -114,13 +102,6 @@
return read_c0_count();
}
-/* For use both as a high precision timer and an interrupt source. */
-static void __init c0_hpt_timer_init(void)
-{
- expirelo = read_c0_count() + cycles_per_jiffy;
- write_c0_compare(expirelo);
-}
-
int (*mips_timer_state)(void);
void (*mips_timer_ack)(void);
@@ -140,35 +121,6 @@
update_process_times(user_mode(get_irq_regs()));
}
-/*
- * High-level timer interrupt service routines. This function
- * is set as irqaction->handler and is invoked through do_IRQ.
- */
-static irqreturn_t timer_interrupt(int irq, void *dev_id)
-{
- write_seqlock(&xtime_lock);
-
- mips_timer_ack();
-
- /*
- * call the generic timer interrupt handling
- */
- do_timer(1);
-
- write_sequnlock(&xtime_lock);
-
- /*
- * In UP mode, we call local_timer_interrupt() to do profiling
- * and process accouting.
- *
- * In SMP mode, local_timer_interrupt() is invoked by appropriate
- * low-level local timer interrupt handler.
- */
- local_timer_interrupt(irq, dev_id);
-
- return IRQ_HANDLED;
-}
-
int null_perf_irq(void)
{
return 0;
@@ -209,81 +161,6 @@
!r2;
}
-void ll_timer_interrupt(int irq, void *dev_id)
-{
- int cpu = smp_processor_id();
-
-#ifdef CONFIG_MIPS_MT_SMTC
- /*
- * In an SMTC system, one Count/Compare set exists per VPE.
- * Which TC within a VPE gets the interrupt is essentially
- * random - we only know that it shouldn't be one with
- * IXMT set. Whichever TC gets the interrupt needs to
- * send special interprocessor interrupts to the other
- * TCs to make sure that they schedule, etc.
- *
- * That code is specific to the SMTC kernel, not to
- * the a particular platform, so it's invoked from
- * the general MIPS timer_interrupt routine.
- */
-
- /*
- * We could be here due to timer interrupt,
- * perf counter overflow, or both.
- */
- (void) handle_perf_irq(1);
-
- if (read_c0_cause() & (1 << 30)) {
- /*
- * There are things we only want to do once per tick
- * in an "MP" system. One TC of each VPE will take
- * the actual timer interrupt. The others will get
- * timer broadcast IPIs. We use whoever it is that takes
- * the tick on VPE 0 to run the full timer_interrupt().
- */
- if (cpu_data[cpu].vpe_id == 0) {
- timer_interrupt(irq, NULL);
- } else {
- write_c0_compare(read_c0_count() +
- (mips_hpt_frequency/HZ));
- local_timer_interrupt(irq, dev_id);
- }
- smtc_timer_broadcast(cpu_data[cpu].vpe_id);
- }
-#else /* CONFIG_MIPS_MT_SMTC */
- int r2 = cpu_has_mips_r2;
-
- if (handle_perf_irq(r2))
- return;
-
- if (r2 && ((read_c0_cause() & (1 << 30)) == 0))
- return;
-
- if (cpu == 0) {
- /*
- * CPU 0 handles the global timer interrupt job and process
- * accounting resets count/compare registers to trigger next
- * timer int.
- */
- timer_interrupt(irq, NULL);
- } else {
- /* Everyone else needs to reset the timer int here as
- ll_local_timer_interrupt doesn't */
- /*
- * FIXME: need to cope with counter underflow.
- * More support needs to be added to kernel/time for
- * counter/timer interrupts on multiple CPU's
- */
- write_c0_compare(read_c0_count() + (mips_hpt_frequency/HZ));
-
- /*
- * Other CPUs should do profiling and process accounting
- */
- local_timer_interrupt(irq, dev_id);
- }
-#endif /* CONFIG_MIPS_MT_SMTC */
-}
-
/*
* time_init() - it does the following things.
*
@@ -301,12 +178,6 @@
unsigned int mips_hpt_frequency;
-static struct irqaction timer_irqaction = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_PERCPU,
- .name = "timer",
-};
-
static unsigned int __init calibrate_hpt(void)
{
cycle_t frequency, hpt_start, hpt_end, hpt_count, hz;
@@ -355,6 +226,65 @@
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
+static int mips_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ unsigned int cnt;
+
+ cnt = read_c0_count();
+ cnt += delta;
+ write_c0_compare(cnt);
+
+ return ((long)(read_c0_count() - cnt ) > 0) ? -ETIME : 0;
+}
+
+static void mips_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ /* Nothing to do ... */
+}
+
+struct clock_event_device mips_clockevent;
+
+static struct clock_event_device *global_cd[NR_CPUS];
+static int cp0_timer_irq_installed;
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ const int r2 = cpu_has_mips_r2;
+ struct clock_event_device *cd;
+ int cpu = smp_processor_id();
+
+ /*
+ * Suckage alert:
+ * Before R2 of the architecture there was no way to see if a
+ * performance counter interrupt was pending, so we have to run
+ * the performance counter interrupt handler anyway.
+ */
+ if (handle_perf_irq(r2))
+ goto out;
+
+ /*
+ * The same applies to performance counter interrupts. But with the
+ * above we now know that the reason we got here must be a timer
+ * interrupt. Being the paranoiacs we are we check anyway.
+ */
+ if (!r2 || (read_c0_cause() & (1 << 30))) {
+ c0_timer_ack();
+ cd = global_cd[cpu];
+ cd->event_handler(cd);
+ }
+
+out:
+ return IRQ_HANDLED;
+}
+
+static struct irqaction timer_irqaction = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .name = "timer",
+};
+
static void __init init_mips_clocksource(void)
{
u64 temp;
@@ -382,6 +312,56 @@
{
}
+void __init __weak plat_timer_setup(struct irqaction *irq)
+{
+}
+
+void __cpuinit mips_clockevent_init(void)
+{
+ uint64_t mips_freq = mips_hpt_frequency;
+ unsigned int cpu = smp_processor_id();
+ struct clock_event_device *cd;
+ unsigned int irq = MIPS_CPU_IRQ_BASE + 7;
+
+ if (!cpu_has_counter)
+ return;
+
+ if (cpu == 0)
+ cd = &mips_clockevent;
+ else
+ cd = kzalloc(sizeof(*cd), GFP_ATOMIC);
+ if (!cd)
+ return; /* We're probably roadkill ... */
+
+ cd->name = "MIPS";
+ cd->features = CLOCK_EVT_FEAT_ONESHOT;
+
+ /* Calculate the min / max delta */
+ cd->mult = div_sc((unsigned long) mips_freq, NSEC_PER_SEC, 32);
+ cd->shift = 32;
+ cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
+ cd->min_delta_ns = clockevent_delta2ns(0x30, cd);
+
+ cd->rating = 300;
+ cd->irq = irq;
+ cd->cpumask = cpumask_of_cpu(cpu);
+ cd->set_next_event = mips_next_event;
+ cd->set_mode = mips_set_mode;
+
+ global_cd[cpu] = cd;
+ clockevents_register_device(cd);
+
+ if (!cp0_timer_irq_installed) {
+#ifdef CONFIG_MIPS_MT_SMTC
+#define CPUCTR_IMASKBIT (0x100 << cp0_compare_irq)
+ setup_irq_smtc(irq, &timer_irqaction, CPUCTR_IMASKBIT);
+#else
+ setup_irq(irq, &timer_irqaction);
+#endif /* CONFIG_MIPS_MT_SMTC */
+ cp0_timer_irq_installed = 1;
+ }
+}
+
void __init time_init(void)
{
plat_time_init();
@@ -407,11 +387,6 @@
/* Calculate cache parameters. */
cycles_per_jiffy =
(mips_hpt_frequency + HZ / 2) / HZ;
- /*
- * This sets up the high precision
- * timer for the first interrupt.
- */
- c0_hpt_timer_init();
}
}
if (!mips_hpt_frequency)
@@ -421,6 +396,10 @@
printk("Using %u.%03u MHz high precision timer.\n",
((mips_hpt_frequency + 500) / 1000) / 1000,
((mips_hpt_frequency + 500) / 1000) % 1000);
+
+#ifdef CONFIG_IRQ_CPU
+ setup_irq(MIPS_CPU_IRQ_BASE + 7, &timer_irqaction);
+#endif
}
if (!mips_timer_ack)
@@ -441,4 +420,5 @@
plat_timer_setup(&timer_irqaction);
init_mips_clocksource();
+ mips_clockevent_init();
}
diff --git a/arch/mips/mips-boards/generic/time.c b/arch/mips/mips-boards/generic/time.c
index 345de88..2c8db3e 100644
--- a/arch/mips/mips-boards/generic/time.c
+++ b/arch/mips/mips-boards/generic/time.c
@@ -144,20 +144,20 @@
mips_scroll_message();
}
-static irqreturn_t mips_perf_interrupt(int irq, void *dev_id)
-{
- return perf_irq();
-}
+//static irqreturn_t mips_perf_interrupt(int irq, void *dev_id)
+//{
+// return perf_irq();
+//}
-static struct irqaction perf_irqaction = {
- .handler = mips_perf_interrupt,
- .flags = IRQF_DISABLED | IRQF_PERCPU,
- .name = "performance",
-};
+//static struct irqaction perf_irqaction = {
+// .handler = mips_perf_interrupt,
+// .flags = IRQF_DISABLED | IRQF_PERCPU,
+// .name = "performance",
+//};
void __init plat_perf_setup(void)
{
- struct irqaction *irq = &perf_irqaction;
+// struct irqaction *irq = &perf_irqaction;
cp0_perfcount_irq = -1;
@@ -170,12 +170,6 @@
if (cp0_perfcount_irq >= 0) {
if (cpu_has_vint)
set_vi_handler(cp0_perfcount_irq, mips_perf_dispatch);
-#ifdef CONFIG_MIPS_MT_SMTC
- setup_irq_smtc(cp0_perfcount_irq, irq,
- 0x100 << cp0_perfcount_irq);
-#else
- setup_irq(cp0_perfcount_irq, irq);
-#endif /* CONFIG_MIPS_MT_SMTC */
#ifdef CONFIG_SMP
set_irq_handler(cp0_perfcount_irq, handle_percpu_irq);
#endif
diff --git a/arch/mips/qemu/q-irq.c b/arch/mips/qemu/q-irq.c
index 89891e9..4681757 100644
--- a/arch/mips/qemu/q-irq.c
+++ b/arch/mips/qemu/q-irq.c
@@ -2,6 +2,7 @@
#include <linux/linkage.h>
#include <asm/i8259.h>
+#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <asm/qemu.h>
#include <asm/system.h>
@@ -12,7 +13,7 @@
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & 0x8000) {
- ll_timer_interrupt(Q_COUNT_COMPARE_IRQ);
+ do_IRQ(Q_COUNT_COMPARE_IRQ);
return;
}
if (pending & 0x0400) {
@@ -29,6 +30,7 @@
{
mips_hpt_frequency = QEMU_C0_COUNTER_CLOCK; /* 100MHz */
+ mips_cpu_irq_init();
init_i8259_irqs();
set_c0_status(0x8400);
}
diff --git a/arch/mips/qemu/q-setup.c b/arch/mips/qemu/q-setup.c
index 8413943..89a2076 100644
--- a/arch/mips/qemu/q-setup.c
+++ b/arch/mips/qemu/q-setup.c
@@ -17,7 +17,6 @@
outb_p(0x34,0x43); /* binary, mode 2, LSB/MSB, ch 0 */
outb_p(LATCH & 0xff , 0x40); /* LSB */
outb(LATCH >> 8 , 0x40); /* MSB */
- setup_irq(0, irq);
}
void __init plat_mem_setup(void)
diff --git a/arch/mips/sgi-ip22/ip22-int.c b/arch/mips/sgi-ip22/ip22-int.c
index 338c0d7..f199da7 100644
--- a/arch/mips/sgi-ip22/ip22-int.c
+++ b/arch/mips/sgi-ip22/ip22-int.c
@@ -242,7 +242,7 @@
* First we check for r4k counter/timer IRQ.
*/
if (pending & CAUSEF_IP7)
- ll_timer_interrupt(SGI_TIMER_IRQ, NULL);
+ do_IRQ(SGI_TIMER_IRQ);
else if (pending & CAUSEF_IP2)
indy_local0_irqdispatch();
else if (pending & CAUSEF_IP3)
diff --git a/arch/mips/sgi-ip32/ip32-irq.c b/arch/mips/sgi-ip32/ip32-irq.c
index 5bad1b7..002095b 100644
--- a/arch/mips/sgi-ip32/ip32-irq.c
+++ b/arch/mips/sgi-ip32/ip32-irq.c
@@ -457,7 +457,7 @@
static void ip32_irq5(void)
{
- ll_timer_interrupt(IP32_R4K_TIMER_IRQ);
+ do_IRQ(IP32_R4K_TIMER_IRQ);
}
asmlinkage void plat_irq_dispatch(void)
diff --git a/arch/mips/sibyte/Kconfig b/arch/mips/sibyte/Kconfig
index 841b301..e8fb880 100644
--- a/arch/mips/sibyte/Kconfig
+++ b/arch/mips/sibyte/Kconfig
@@ -1,6 +1,7 @@
config SIBYTE_SB1250
bool
select HW_HAS_PCI
+ select IRQ_CPU
select SIBYTE_ENABLE_LDT_IF_PCI
select SIBYTE_HAS_ZBUS_PROFILING
select SIBYTE_SB1xxx_SOC
@@ -8,6 +9,7 @@
config SIBYTE_BCM1120
bool
+ select IRQ_CPU
select SIBYTE_BCM112X
select SIBYTE_HAS_ZBUS_PROFILING
select SIBYTE_SB1xxx_SOC
@@ -15,6 +17,7 @@
config SIBYTE_BCM1125
bool
select HW_HAS_PCI
+ select IRQ_CPU
select SIBYTE_BCM112X
select SIBYTE_HAS_ZBUS_PROFILING
select SIBYTE_SB1xxx_SOC
@@ -22,6 +25,7 @@
config SIBYTE_BCM1125H
bool
select HW_HAS_PCI
+ select IRQ_CPU
select SIBYTE_BCM112X
select SIBYTE_ENABLE_LDT_IF_PCI
select SIBYTE_HAS_ZBUS_PROFILING
@@ -29,12 +33,14 @@
config SIBYTE_BCM112X
bool
+ select IRQ_CPU
select SIBYTE_SB1xxx_SOC
select SIBYTE_HAS_ZBUS_PROFILING
config SIBYTE_BCM1x80
bool
select HW_HAS_PCI
+ select IRQ_CPU
select SIBYTE_HAS_ZBUS_PROFILING
select SIBYTE_SB1xxx_SOC
select SYS_SUPPORTS_SMP
@@ -42,6 +48,7 @@
config SIBYTE_BCM1x55
bool
select HW_HAS_PCI
+ select IRQ_CPU
select SIBYTE_SB1xxx_SOC
select SIBYTE_HAS_ZBUS_PROFILING
select SYS_SUPPORTS_SMP
@@ -49,6 +56,7 @@
config SIBYTE_SB1xxx_SOC
bool
select DMA_COHERENT
+ select IRQ_CPU
select SIBYTE_CFE
select SWAP_IO_SPACE
select SYS_SUPPORTS_32BIT_KERNEL
@@ -166,10 +174,6 @@
buffer activity. Raw buffer data is dumped to console, and
must be processed off-line.
-config SIBYTE_SB1250_PROF
- bool "Support for SB1/SOC profiling - SB1/SCD perf counters"
- depends on SIBYTE_SB1xxx_SOC
-
config SIBYTE_TBPROF
tristate "Support for ZBbus profiling"
depends on SIBYTE_HAS_ZBUS_PROFILING
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index e729b5f..cf979db 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -450,7 +450,6 @@
#endif /* CONFIG_KGDB */
-extern void bcm1480_timer_interrupt(void);
extern void bcm1480_mailbox_interrupt(void);
asmlinkage void plat_irq_dispatch(void)
@@ -470,8 +469,16 @@
else
#endif
- if (pending & CAUSEF_IP4)
- bcm1480_timer_interrupt();
+ if (pending & CAUSEF_IP4) {
+ int cpu = smp_processor_id();
+ int irq = K_BCM1480_INT_TIMER_0 + cpu;
+
+ /* Reset the timer */
+ __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
+ IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+
+ do_IRQ(irq);
+ }
#ifdef CONFIG_SMP
else if (pending & CAUSEF_IP3)
diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index ad593a6..6a4cc84 100644
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -28,6 +28,7 @@
#include <asm/errno.h>
#include <asm/signal.h>
#include <asm/system.h>
+#include <asm/time.h>
#include <asm/io.h>
#include <asm/sibyte/sb1250_regs.h>
@@ -399,18 +400,45 @@
#endif /* CONFIG_KGDB */
-extern void sb1250_timer_interrupt(void);
+static inline void sb1250_timer_interrupt(void)
+{
+ int cpu = smp_processor_id();
+ int irq = K_INT_TIMER_0 + cpu;
+
+ irq_enter();
+ kstat_this_cpu.irqs[irq]++;
+
+ write_seqlock(&xtime_lock);
+
+ /* ACK interrupt */
+ ____raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
+ IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+
+ /*
+ * call the generic timer interrupt handling
+ */
+ do_timer(1);
+
+ write_sequnlock(&xtime_lock);
+
+ /*
+ * In UP mode, we call local_timer_interrupt() to do profiling
+ * and process accouting.
+ *
+ * In SMP mode, local_timer_interrupt() is invoked by appropriate
+ * low-level local timer interrupt handler.
+ */
+ local_timer_interrupt(irq);
+
+ irq_exit();
+}
+
extern void sb1250_mailbox_interrupt(void);
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending;
-#ifdef CONFIG_SIBYTE_SB1250_PROF
- /* Set compare to count to silence count/compare timer interrupts */
- write_c0_compare(read_c0_count());
-#endif
-
/*
* What a pain. We have to be really careful saving the upper 32 bits
* of any * register across function calls if we don't want them
@@ -423,13 +451,9 @@
pending = read_c0_cause() & read_c0_status() & ST0_IM;
-#ifdef CONFIG_SIBYTE_SB1250_PROF
- if (pending & CAUSEF_IP7) /* Cpu performance counter interrupt */
- sbprof_cpu_intr();
- else
-#endif
-
- if (pending & CAUSEF_IP4)
+ if (pending & CAUSEF_IP7) /* CPU performance counter interrupt */
+ do_IRQ(MIPS_CPU_IRQ_BASE + 7);
+ else if (pending & CAUSEF_IP4)
sb1250_timer_interrupt();
#ifdef CONFIG_SMP
diff --git a/arch/mips/sibyte/sb1250/time.c b/arch/mips/sibyte/sb1250/time.c
index 5bb83cd..eb17707 100644
--- a/arch/mips/sibyte/sb1250/time.c
+++ b/arch/mips/sibyte/sb1250/time.c
@@ -116,18 +116,6 @@
*/
}
-void sb1250_timer_interrupt(void)
-{
- int cpu = smp_processor_id();
- int irq = K_INT_TIMER_0 + cpu;
-
- /* ACK interrupt */
- ____raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
- IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
-
- ll_timer_interrupt(irq);
-}
-
/*
* The HPT is free running from SB1250_HPT_VALUE down to 0 then starts over
* again.
diff --git a/include/asm-mips/mach-ip27/irq.h b/include/asm-mips/mach-ip27/irq.h
index 25f0c3f..cf4384b 100644
--- a/include/asm-mips/mach-ip27/irq.h
+++ b/include/asm-mips/mach-ip27/irq.h
@@ -17,4 +17,6 @@
*/
#define NR_IRQS 256
+#include_next <irq.h>
+
#endif /* __ASM_MACH_IP27_IRQ_H */
diff --git a/include/asm-mips/qemu.h b/include/asm-mips/qemu.h
index 531caf4..487ced4 100644
--- a/include/asm-mips/qemu.h
+++ b/include/asm-mips/qemu.h
@@ -12,7 +12,7 @@
* Interrupt numbers
*/
#define Q_PIC_IRQ_BASE 0
-#define Q_COUNT_COMPARE_IRQ 16
+#define Q_COUNT_COMPARE_IRQ 23
/*
* Qemu clock rate. Unlike on real MIPS this has no relation to the
diff --git a/include/asm-mips/time.h b/include/asm-mips/time.h
index 3516b32..35555bd 100644
--- a/include/asm-mips/time.h
+++ b/include/asm-mips/time.h
@@ -49,11 +49,6 @@
extern struct clocksource clocksource_mips;
/*
- * The low-level timer interrupt routine.
- */
-extern void ll_timer_interrupt(int irq, void *dev_id);
-
-/*
* profiling and process accouting is done separately in local_timer_interrupt
*/
extern void local_timer_interrupt(int irq, void *dev_id);
@@ -78,4 +73,9 @@
*/
extern int (*perf_irq)(void);
+/*
+ * Initialize the calling CPU's compare interrupt as clockevent device
+ */
+extern void mips_clockevent_init(void);
+
#endif /* _ASM_TIME_H */