diff options
Diffstat (limited to 'arch/mips/kernel/cevt-gic.c')
-rw-r--r-- | arch/mips/kernel/cevt-gic.c | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/arch/mips/kernel/cevt-gic.c b/arch/mips/kernel/cevt-gic.c deleted file mode 100644 index 6093716980b9..000000000000 --- a/arch/mips/kernel/cevt-gic.c +++ /dev/null | |||
@@ -1,105 +0,0 @@ | |||
1 | /* | ||
2 | * This file is subject to the terms and conditions of the GNU General Public | ||
3 | * License. See the file "COPYING" in the main directory of this archive | ||
4 | * for more details. | ||
5 | * | ||
6 | * Copyright (C) 2013 Imagination Technologies Ltd. | ||
7 | */ | ||
8 | #include <linux/clockchips.h> | ||
9 | #include <linux/interrupt.h> | ||
10 | #include <linux/percpu.h> | ||
11 | #include <linux/smp.h> | ||
12 | #include <linux/irq.h> | ||
13 | |||
14 | #include <asm/time.h> | ||
15 | #include <asm/gic.h> | ||
16 | #include <asm/mips-boards/maltaint.h> | ||
17 | |||
18 | DEFINE_PER_CPU(struct clock_event_device, gic_clockevent_device); | ||
19 | int gic_timer_irq_installed; | ||
20 | |||
21 | |||
22 | static int gic_next_event(unsigned long delta, struct clock_event_device *evt) | ||
23 | { | ||
24 | u64 cnt; | ||
25 | int res; | ||
26 | |||
27 | cnt = gic_read_count(); | ||
28 | cnt += (u64)delta; | ||
29 | gic_write_cpu_compare(cnt, cpumask_first(evt->cpumask)); | ||
30 | res = ((int)(gic_read_count() - cnt) >= 0) ? -ETIME : 0; | ||
31 | return res; | ||
32 | } | ||
33 | |||
34 | void gic_set_clock_mode(enum clock_event_mode mode, | ||
35 | struct clock_event_device *evt) | ||
36 | { | ||
37 | /* Nothing to do ... */ | ||
38 | } | ||
39 | |||
40 | irqreturn_t gic_compare_interrupt(int irq, void *dev_id) | ||
41 | { | ||
42 | struct clock_event_device *cd; | ||
43 | int cpu = smp_processor_id(); | ||
44 | |||
45 | gic_write_compare(gic_read_compare()); | ||
46 | cd = &per_cpu(gic_clockevent_device, cpu); | ||
47 | cd->event_handler(cd); | ||
48 | return IRQ_HANDLED; | ||
49 | } | ||
50 | |||
51 | struct irqaction gic_compare_irqaction = { | ||
52 | .handler = gic_compare_interrupt, | ||
53 | .flags = IRQF_PERCPU | IRQF_TIMER, | ||
54 | .name = "timer", | ||
55 | }; | ||
56 | |||
57 | |||
58 | void gic_event_handler(struct clock_event_device *dev) | ||
59 | { | ||
60 | } | ||
61 | |||
62 | int gic_clockevent_init(void) | ||
63 | { | ||
64 | unsigned int cpu = smp_processor_id(); | ||
65 | struct clock_event_device *cd; | ||
66 | unsigned int irq; | ||
67 | |||
68 | if (!cpu_has_counter || !gic_frequency) | ||
69 | return -ENXIO; | ||
70 | |||
71 | irq = MIPS_GIC_IRQ_BASE; | ||
72 | |||
73 | cd = &per_cpu(gic_clockevent_device, cpu); | ||
74 | |||
75 | cd->name = "MIPS GIC"; | ||
76 | cd->features = CLOCK_EVT_FEAT_ONESHOT | | ||
77 | CLOCK_EVT_FEAT_C3STOP; | ||
78 | |||
79 | clockevent_set_clock(cd, gic_frequency); | ||
80 | |||
81 | /* Calculate the min / max delta */ | ||
82 | cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); | ||
83 | cd->min_delta_ns = clockevent_delta2ns(0x300, cd); | ||
84 | |||
85 | cd->rating = 300; | ||
86 | cd->irq = irq; | ||
87 | cd->cpumask = cpumask_of(cpu); | ||
88 | cd->set_next_event = gic_next_event; | ||
89 | cd->set_mode = gic_set_clock_mode; | ||
90 | cd->event_handler = gic_event_handler; | ||
91 | |||
92 | clockevents_register_device(cd); | ||
93 | |||
94 | GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_MAP), 0x80000002); | ||
95 | GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_SMASK), GIC_VPE_SMASK_CMP_MSK); | ||
96 | |||
97 | if (gic_timer_irq_installed) | ||
98 | return 0; | ||
99 | |||
100 | gic_timer_irq_installed = 1; | ||
101 | |||
102 | setup_irq(irq, &gic_compare_irqaction); | ||
103 | irq_set_handler(irq, handle_percpu_irq); | ||
104 | return 0; | ||
105 | } | ||