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-rw-r--r--arch/mips/mipssim/sim_time.c72
1 files changed, 0 insertions, 72 deletions
diff --git a/arch/mips/mipssim/sim_time.c b/arch/mips/mipssim/sim_time.c
index 9a355e77952f..3625f7d49035 100644
--- a/arch/mips/mipssim/sim_time.c
+++ b/arch/mips/mipssim/sim_time.c
@@ -23,77 +23,6 @@
23 23
24unsigned long cpu_khz; 24unsigned long cpu_khz;
25 25
26irqreturn_t sim_timer_interrupt(int irq, void *dev_id)
27{
28#ifdef CONFIG_SMP
29 int cpu = smp_processor_id();
30
31 /*
32 * CPU 0 handles the global timer interrupt job
33 * resets count/compare registers to trigger next timer int.
34 */
35#ifndef CONFIG_MIPS_MT_SMTC
36 if (cpu == 0) {
37 timer_interrupt(irq, dev_id);
38 } else {
39 /* Everyone else needs to reset the timer int here as
40 ll_local_timer_interrupt doesn't */
41 /*
42 * FIXME: need to cope with counter underflow.
43 * More support needs to be added to kernel/time for
44 * counter/timer interrupts on multiple CPU's
45 */
46 write_c0_compare (read_c0_count() + ( mips_hpt_frequency/HZ));
47 }
48#else /* SMTC */
49 /*
50 * In SMTC system, one Count/Compare set exists per VPE.
51 * Which TC within a VPE gets the interrupt is essentially
52 * random - we only know that it shouldn't be one with
53 * IXMT set. Whichever TC gets the interrupt needs to
54 * send special interprocessor interrupts to the other
55 * TCs to make sure that they schedule, etc.
56 *
57 * That code is specific to the SMTC kernel, not to
58 * the simulation platform, so it's invoked from
59 * the general MIPS timer_interrupt routine.
60 *
61 * We have a problem in that the interrupt vector code
62 * had to turn off the timer IM bit to avoid redundant
63 * entries, but we may never get to mips_cpu_irq_end
64 * to turn it back on again if the scheduler gets
65 * involved. So we clear the pending timer here,
66 * and re-enable the mask...
67 */
68
69 int vpflags = dvpe();
70 write_c0_compare (read_c0_count() - 1);
71 clear_c0_cause(0x100 << cp0_compare_irq);
72 set_c0_status(0x100 << cp0_compare_irq);
73 irq_enable_hazard();
74 evpe(vpflags);
75
76 if (cpu_data[cpu].vpe_id == 0)
77 timer_interrupt(irq, dev_id);
78 else
79 write_c0_compare (read_c0_count() + ( mips_hpt_frequency/HZ));
80 smtc_timer_broadcast(cpu_data[cpu].vpe_id);
81
82#endif /* CONFIG_MIPS_MT_SMTC */
83
84 /*
85 * every CPU should do profiling and process accounting
86 */
87 local_timer_interrupt (irq, dev_id);
88
89 return IRQ_HANDLED;
90#else
91 return timer_interrupt (irq, dev_id);
92#endif
93}
94
95
96
97/* 26/*
98 * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect 27 * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect
99 */ 28 */
@@ -185,7 +114,6 @@ void __init plat_timer_setup(struct irqaction *irq)
185 } 114 }
186 115
187 /* we are using the cpu counter for timer interrupts */ 116 /* we are using the cpu counter for timer interrupts */
188 irq->handler = sim_timer_interrupt;
189 setup_irq(mips_cpu_timer_irq, irq); 117 setup_irq(mips_cpu_timer_irq, irq);
190 118
191#ifdef CONFIG_SMP 119#ifdef CONFIG_SMP