summaryrefslogtreecommitdiff
path: root/arch/mips/sgi-ip27/ip27-timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/sgi-ip27/ip27-timer.c')
-rw-r--r--arch/mips/sgi-ip27/ip27-timer.c126
1 files changed, 26 insertions, 100 deletions
diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index 2e21b761cb9c..444b5e0e935f 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -1,12 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- * Copytight (C) 1999, 2000, 05, 06 Ralf Baechle (ralf@linux-mips.org)
- * Copytight (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 1999, 2000, 05, 06 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#include <linux/bcd.h>
#include <linux/clockchips.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <linux/sched_clock.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/param.h>
@@ -17,38 +19,13 @@
#include <linux/platform_device.h>
#include <asm/time.h>
-#include <asm/pgtable.h>
#include <asm/sgialib.h>
-#include <asm/sn/ioc3.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/arch.h>
#include <asm/sn/addrs.h>
-#include <asm/sn/sn_private.h>
-#include <asm/sn/sn0/ip27.h>
-#include <asm/sn/sn0/hub.h>
+#include <asm/sn/agent.h>
-#define TICK_SIZE (tick_nsec / 1000)
-
-/* Includes for ioc3_init(). */
-#include <asm/sn/types.h>
-#include <asm/sn/sn0/addrs.h>
-#include <asm/sn/sn0/hubni.h>
-#include <asm/sn/sn0/hubio.h>
-#include <asm/pci/bridge.h>
-
-static void enable_rt_irq(struct irq_data *d)
-{
-}
-
-static void disable_rt_irq(struct irq_data *d)
-{
-}
-
-static struct irq_chip rt_irq_type = {
- .name = "SN HUB RT timer",
- .irq_mask = disable_rt_irq,
- .irq_unmask = enable_rt_irq,
-};
+#include "ip27-common.h"
static int rt_next_event(unsigned long delta, struct clock_event_device *evt)
{
@@ -63,14 +40,6 @@ static int rt_next_event(unsigned long delta, struct clock_event_device *evt)
return LOCAL_HUB_L(PI_RT_COUNT) >= cnt ? -ETIME : 0;
}
-static void rt_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- /* Nothing to do ... */
-}
-
-unsigned int rt_timer_irq;
-
static DEFINE_PER_CPU(struct clock_event_device, hub_rt_clockevent);
static DEFINE_PER_CPU(char [11], hub_rt_name);
@@ -91,6 +60,7 @@ static irqreturn_t hub_rt_counter_handler(int irq, void *dev_id)
struct irqaction hub_rt_irqaction = {
.handler = hub_rt_counter_handler,
+ .percpu_dev_id = &hub_rt_clockevent,
.flags = IRQF_PERCPU | IRQF_TIMER,
.name = "hub-rt",
};
@@ -106,47 +76,37 @@ struct irqaction hub_rt_irqaction = {
#define NSEC_PER_CYCLE 800
#define CYCLES_PER_SEC (NSEC_PER_SEC / NSEC_PER_CYCLE)
-void __cpuinit hub_rt_clock_event_init(void)
+void hub_rt_clock_event_init(void)
{
unsigned int cpu = smp_processor_id();
struct clock_event_device *cd = &per_cpu(hub_rt_clockevent, cpu);
unsigned char *name = per_cpu(hub_rt_name, cpu);
- int irq = rt_timer_irq;
sprintf(name, "hub-rt %d", cpu);
cd->name = name;
cd->features = CLOCK_EVT_FEAT_ONESHOT;
clockevent_set_clock(cd, CYCLES_PER_SEC);
cd->max_delta_ns = clockevent_delta2ns(0xfffffffffffff, cd);
+ cd->max_delta_ticks = 0xfffffffffffff;
cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
+ cd->min_delta_ticks = 0x300;
cd->rating = 200;
- cd->irq = irq;
+ cd->irq = IP27_RT_TIMER_IRQ;
cd->cpumask = cpumask_of(cpu);
cd->set_next_event = rt_next_event;
- cd->set_mode = rt_set_mode;
clockevents_register_device(cd);
+
+ enable_percpu_irq(IP27_RT_TIMER_IRQ, IRQ_TYPE_NONE);
}
static void __init hub_rt_clock_event_global_init(void)
{
- int irq;
-
- do {
- smp_wmb();
- irq = rt_timer_irq;
- if (irq)
- break;
-
- irq = allocate_irqno();
- if (irq < 0)
- panic("Allocation of irq number for timer failed");
- } while (xchg(&rt_timer_irq, irq));
-
- irq_set_chip_and_handler(irq, &rt_irq_type, handle_percpu_irq);
- setup_irq(irq, &hub_rt_irqaction);
+ irq_set_handler(IP27_RT_TIMER_IRQ, handle_percpu_devid_irq);
+ irq_set_percpu_devid(IP27_RT_TIMER_IRQ);
+ setup_percpu_irq(IP27_RT_TIMER_IRQ, &hub_rt_irqaction);
}
-static cycle_t hub_rt_read(struct clocksource *cs)
+static u64 hub_rt_read(struct clocksource *cs)
{
return REMOTE_HUB_L(cputonasid(0), PI_RT_COUNT);
}
@@ -159,11 +119,18 @@ struct clocksource hub_rt_clocksource = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
+static u64 notrace hub_rt_read_sched_clock(void)
+{
+ return REMOTE_HUB_L(cputonasid(0), PI_RT_COUNT);
+}
+
static void __init hub_rt_clocksource_init(void)
{
struct clocksource *cs = &hub_rt_clocksource;
clocksource_register_hz(cs, CYCLES_PER_SEC);
+
+ sched_clock_register(hub_rt_read_sched_clock, 52, CYCLES_PER_SEC);
}
void __init plat_time_init(void)
@@ -173,28 +140,7 @@ void __init plat_time_init(void)
hub_rt_clock_event_init();
}
-void __cpuinit cpu_time_init(void)
-{
- lboard_t *board;
- klcpu_t *cpu;
- int cpuid;
-
- /* Don't use ARCS. ARCS is fragile. Klconfig is simple and sane. */
- board = find_lboard(KL_CONFIG_INFO(get_nasid()), KLTYPE_IP27);
- if (!board)
- panic("Can't find board info for myself.");
-
- cpuid = LOCAL_HUB_L(PI_CPU_NUM) ? IP27_CPU0_INDEX : IP27_CPU1_INDEX;
- cpu = (klcpu_t *) KLCF_COMP(board, cpuid);
- if (!cpu)
- panic("No information about myself?");
-
- printk("CPU %d clock is %dMHz.\n", smp_processor_id(), cpu->cpu_speed);
-
- set_c0_status(SRB_TIMOCLK);
-}
-
-void __cpuinit hub_rtc_init(cnodeid_t cnode)
+void hub_rtc_init(nasid_t nasid)
{
/*
@@ -202,7 +148,7 @@ void __cpuinit hub_rtc_init(cnodeid_t cnode)
* If this is not the current node then it is a cpuless
* node and timeouts will not happen there.
*/
- if (get_compact_nodeid() == cnode) {
+ if (get_nasid() == nasid) {
LOCAL_HUB_S(PI_RT_EN_A, 1);
LOCAL_HUB_S(PI_RT_EN_B, 1);
LOCAL_HUB_S(PI_PROF_EN_A, 0);
@@ -212,23 +158,3 @@ void __cpuinit hub_rtc_init(cnodeid_t cnode)
LOCAL_HUB_S(PI_RT_PEND_B, 0);
}
}
-
-static int __init sgi_ip27_rtc_devinit(void)
-{
- struct resource res;
-
- memset(&res, 0, sizeof(res));
- res.start = XPHYSADDR(KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base +
- IOC3_BYTEBUS_DEV0);
- res.end = res.start + 32767;
- res.flags = IORESOURCE_MEM;
-
- return IS_ERR(platform_device_register_simple("rtc-m48t35", -1,
- &res, 1));
-}
-
-/*
- * kludge make this a device_initcall after ioc3 resource conflicts
- * are resolved
- */
-late_initcall(sgi_ip27_rtc_devinit);
generated by cgit (git 2.34.1) at 2025-12-25 08:53:54 +0000