#include <asm/mipsregs.h>
#include <asm/mipsmtregs.h>
#include <asm/hardirq.h>
+#include <asm/i8253.h>
#include <asm/irq.h>
#include <asm/div64.h>
#include <asm/cpu.h>
unsigned long cpu_khz;
static int mips_cpu_timer_irq;
-extern int mipsxx_perfcount_irq;
-extern void smtc_timer_broadcast(int);
+extern int cp0_perfcount_irq;
static void mips_timer_dispatch(void)
{
static void mips_perf_dispatch(void)
{
- do_IRQ(mipsxx_perfcount_irq);
-}
-
-/*
- * Redeclare until I get around mopping the timer code insanity on MIPS.
- */
-extern int null_perf_irq(void);
-
-extern int (*perf_irq)(void);
-
-/*
- * Possibly handle a performance counter interrupt.
- * Return true if the timer interrupt should not be checked
- */
-static inline int handle_perf_irq (int r2)
-{
- /*
- * The performance counter overflow interrupt may be shared with the
- * timer interrupt (mipsxx_perfcount_irq < 0). If it is and a
- * performance counter has overflowed (perf_irq() == IRQ_HANDLED)
- * and we can't reliably determine if a counter interrupt has also
- * happened (!r2) then don't check for a timer interrupt.
- */
- return (mipsxx_perfcount_irq < 0) &&
- perf_irq() == IRQ_HANDLED &&
- !r2;
-}
-
-irqreturn_t mips_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))
- goto out;
-
- if (r2 && ((read_c0_cause() & (1 << 30)) == 0))
- goto out;
-
- 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);
- }
-out:
-#endif /* CONFIG_MIPS_MT_SMTC */
- return IRQ_HANDLED;
+ do_IRQ(cp0_perfcount_irq);
}
/*
return count;
}
-unsigned long __init mips_rtc_get_time(void)
+unsigned long read_persistent_clock(void)
{
return mc146818_get_cmos_time();
}
-void __init mips_time_init(void)
+void __init plat_time_init(void)
{
unsigned int est_freq;
/* Set Data mode - binary. */
CMOS_WRITE(CMOS_READ(RTC_CONTROL) | RTC_DM_BINARY, RTC_CONTROL);
- est_freq = estimate_cpu_frequency ();
+ est_freq = estimate_cpu_frequency();
printk("CPU frequency %d.%02d MHz\n", est_freq/1000000,
(est_freq%1000000)*100/1000000);
cpu_khz = est_freq / 1000;
mips_scroll_message();
+#ifdef CONFIG_I8253 /* Only Malta has a PIT */
+ setup_pit_timer();
+#endif
}
-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",
-};
-
-void __init plat_perf_setup(struct irqaction *irq)
+void __init plat_perf_setup(void)
{
- int hwint = 0;
- mipsxx_perfcount_irq = -1;
+ cp0_perfcount_irq = -1;
#ifdef MSC01E_INT_BASE
if (cpu_has_veic) {
- set_vi_handler (MSC01E_INT_PERFCTR, mips_perf_dispatch);
- mipsxx_perfcount_irq = MSC01E_INT_BASE + MSC01E_INT_PERFCTR;
+ set_vi_handler(MSC01E_INT_PERFCTR, mips_perf_dispatch);
+ cp0_perfcount_irq = MSC01E_INT_BASE + MSC01E_INT_PERFCTR;
} else
#endif
- if (cpu_has_mips_r2) {
- /*
- * Read IntCtl.IPPCI to determine the performance
- * counter interrupt
- */
- hwint = (read_c0_intctl () >> 26) & 7;
- if (hwint != MIPSCPU_INT_CPUCTR) {
- if (cpu_has_vint)
- set_vi_handler (hwint, mips_perf_dispatch);
- mipsxx_perfcount_irq = MIPSCPU_INT_BASE + hwint;
- }
- }
- if (mipsxx_perfcount_irq >= 0) {
-#ifdef CONFIG_MIPS_MT_SMTC
- setup_irq_smtc(mipsxx_perfcount_irq, irq, 0x100 << hwint);
-#else
- setup_irq(mipsxx_perfcount_irq, irq);
-#endif /* CONFIG_MIPS_MT_SMTC */
+ if (cp0_perfcount_irq >= 0) {
+ if (cpu_has_vint)
+ set_vi_handler(cp0_perfcount_irq, mips_perf_dispatch);
#ifdef CONFIG_SMP
- set_irq_handler(mipsxx_perfcount_irq, handle_percpu_irq);
+ set_irq_handler(cp0_perfcount_irq, handle_percpu_irq);
#endif
}
}
void __init plat_timer_setup(struct irqaction *irq)
{
- int hwint = 0;
#ifdef MSC01E_INT_BASE
if (cpu_has_veic) {
- set_vi_handler (MSC01E_INT_CPUCTR, mips_timer_dispatch);
+ set_vi_handler(MSC01E_INT_CPUCTR, mips_timer_dispatch);
mips_cpu_timer_irq = MSC01E_INT_BASE + MSC01E_INT_CPUCTR;
}
else
#endif
{
- if (cpu_has_mips_r2)
- /*
- * Read IntCtl.IPTI to determine the timer interrupt
- */
- hwint = (read_c0_intctl () >> 29) & 7;
- else
- hwint = MIPSCPU_INT_CPUCTR;
if (cpu_has_vint)
- set_vi_handler (hwint, mips_timer_dispatch);
- mips_cpu_timer_irq = MIPSCPU_INT_BASE + hwint;
+ set_vi_handler(cp0_compare_irq, mips_timer_dispatch);
+ mips_cpu_timer_irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq;
}
- /* we are using the cpu counter for timer interrupts */
- irq->handler = mips_timer_interrupt; /* we use our own handler */
#ifdef CONFIG_MIPS_MT_SMTC
- setup_irq_smtc(mips_cpu_timer_irq, irq, 0x100 << hwint);
+ setup_irq_smtc(mips_cpu_timer_irq, irq, 0x100 << cp0_compare_irq);
#else
setup_irq(mips_cpu_timer_irq, irq);
#endif /* CONFIG_MIPS_MT_SMTC */
set_irq_handler(mips_cpu_timer_irq, handle_percpu_irq);
#endif
- plat_perf_setup(&perf_irqaction);
+ plat_perf_setup();
}
git.openpandora.org / pandora-kernel.git / blobdiff