X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fmips%2Fmips-boards%2Fgeneric%2Ftime.c;h=9d6243a8c15a25e430141833eadc4614005733f7;hb=37e58df30063e229ee5157f9d1c1fa1d749917c2;hp=c45d556aa96bd3553e1accbe115521391efc9b22;hpb=044f620ac65d0d90727cdbd0c058e4d150d62ddc;p=pandora-kernel.git diff --git a/arch/mips/mips-boards/generic/time.c b/arch/mips/mips-boards/generic/time.c index c45d556aa96b..9d6243a8c15a 100644 --- a/arch/mips/mips-boards/generic/time.c +++ b/arch/mips/mips-boards/generic/time.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -55,7 +56,6 @@ unsigned long cpu_khz; static int mips_cpu_timer_irq; extern int cp0_perfcount_irq; -extern void smtc_timer_broadcast(int); static void mips_timer_dispatch(void) { @@ -67,108 +67,6 @@ static void mips_perf_dispatch(void) do_IRQ(cp0_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 (cp0_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 (cp0_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; -} - /* * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect */ @@ -224,19 +122,19 @@ static unsigned int __init estimate_cpu_frequency(void) 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); @@ -244,38 +142,24 @@ void __init mips_time_init(void) 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) { cp0_perfcount_irq = -1; #ifdef MSC01E_INT_BASE if (cpu_has_veic) { - set_vi_handler (MSC01E_INT_PERFCTR, mips_perf_dispatch); + set_vi_handler(MSC01E_INT_PERFCTR, mips_perf_dispatch); cp0_perfcount_irq = MSC01E_INT_BASE + MSC01E_INT_PERFCTR; } else #endif 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 @@ -286,7 +170,7 @@ void __init plat_timer_setup(struct irqaction *irq) { #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 @@ -297,8 +181,6 @@ void __init plat_timer_setup(struct irqaction *irq) 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 << cp0_compare_irq); #else @@ -308,5 +190,5 @@ void __init plat_timer_setup(struct irqaction *irq) set_irq_handler(mips_cpu_timer_irq, handle_percpu_irq); #endif - plat_perf_setup(&perf_irqaction); + plat_perf_setup(); }