From 91a2fcc88634663e9e13dcdfad0e4a860e64aeee Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 11 Oct 2007 23:46:09 +0100 Subject: [MIPS] Consolidate all variants of MIPS cp0 timer interrupt handlers. Signed-off-by: Ralf Baechle --- arch/mips/mipssim/sim_time.c | 72 -------------------------------------------- 1 file changed, 72 deletions(-) (limited to 'arch/mips/mipssim/sim_time.c') diff --git a/arch/mips/mipssim/sim_time.c b/arch/mips/mipssim/sim_time.c index 9a355e7..3625f7d 100644 --- a/arch/mips/mipssim/sim_time.c +++ b/arch/mips/mipssim/sim_time.c @@ -23,77 +23,6 @@ unsigned long cpu_khz; -irqreturn_t sim_timer_interrupt(int irq, void *dev_id) -{ -#ifdef CONFIG_SMP - int cpu = smp_processor_id(); - - /* - * CPU 0 handles the global timer interrupt job - * resets count/compare registers to trigger next timer int. - */ -#ifndef CONFIG_MIPS_MT_SMTC - if (cpu == 0) { - timer_interrupt(irq, dev_id); - } 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)); - } -#else /* SMTC */ - /* - * In 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 simulation platform, so it's invoked from - * the general MIPS timer_interrupt routine. - * - * We have a problem in that the interrupt vector code - * had to turn off the timer IM bit to avoid redundant - * entries, but we may never get to mips_cpu_irq_end - * to turn it back on again if the scheduler gets - * involved. So we clear the pending timer here, - * and re-enable the mask... - */ - - int vpflags = dvpe(); - write_c0_compare (read_c0_count() - 1); - clear_c0_cause(0x100 << cp0_compare_irq); - set_c0_status(0x100 << cp0_compare_irq); - irq_enable_hazard(); - evpe(vpflags); - - if (cpu_data[cpu].vpe_id == 0) - timer_interrupt(irq, dev_id); - else - write_c0_compare (read_c0_count() + ( mips_hpt_frequency/HZ)); - smtc_timer_broadcast(cpu_data[cpu].vpe_id); - -#endif /* CONFIG_MIPS_MT_SMTC */ - - /* - * every CPU should do profiling and process accounting - */ - local_timer_interrupt (irq, dev_id); - - return IRQ_HANDLED; -#else - return timer_interrupt (irq, dev_id); -#endif -} - - - /* * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect */ @@ -185,7 +114,6 @@ void __init plat_timer_setup(struct irqaction *irq) } /* we are using the cpu counter for timer interrupts */ - irq->handler = sim_timer_interrupt; setup_irq(mips_cpu_timer_irq, irq); #ifdef CONFIG_SMP -- cgit v1.1