Implement generic time support for MN10300.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
config GENERIC_HWEIGHT
def_bool y
+config GENERIC_TIME
+ def_bool y
+
+config GENERIC_CLOCKEVENTS
+ def_bool y
+
+config GENERIC_CLOCKEVENTS_BUILD
+ def_bool y
+ depends on GENERIC_CLOCKEVENTS
+
+config GENERIC_CLOCKEVENTS_BROADCAST
+ bool
+
+config CEVT_MN10300
+ def_bool y
+ depends on GENERIC_CLOCKEVENTS
+
+config CSRC_MN10300
+ def_bool y
+ depends on GENERIC_TIME
+
config GENERIC_BUG
def_bool y
single-stepping, which are taken over completely by the JTAG unit.
source "kernel/Kconfig.hz"
+source "kernel/time/Kconfig"
config MN10300_RTC
bool "Using MN10300 RTC"
#define CLOCK_TICK_RATE MN10300_JCCLK /* Underlying HZ */
-extern cycles_t cacheflush_time;
-
#ifdef __KERNEL__
+extern cycles_t cacheflush_time;
+
static inline cycles_t get_cycles(void)
{
return read_timestamp_counter();
}
+extern int init_clockevents(void);
+extern int init_clocksource(void);
+
+static inline void setup_jiffies_interrupt(int irq,
+ struct irqaction *action)
+{
+ u16 tmp;
+ setup_irq(irq, action);
+ set_intr_level(irq, NUM2GxICR_LEVEL(CONFIG_TIMER_IRQ_LEVEL));
+ GxICR(irq) |= GxICR_ENABLE | GxICR_DETECT | GxICR_REQUEST;
+ tmp = GxICR(irq);
+}
+
#endif /* __KERNEL__ */
#endif /* _ASM_TIMEX_H */
obj-$(CONFIG_PROFILE) += profile.o profile-low.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_KPROBES) += kprobes.o
+obj-$(CONFIG_CSRC_MN10300) += csrc-mn10300.o
+obj-$(CONFIG_CEVT_MN10300) += cevt-mn10300.o
--- /dev/null
+/* MN10300 clockevents
+ *
+ * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
+ * Written by Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/percpu.h>
+#include <linux/smp.h>
+#include <asm/timex.h>
+#include "internal.h"
+
+#ifdef CONFIG_SMP
+#if (CONFIG_NR_CPUS > 2) && !defined(CONFIG_GEENERIC_CLOCKEVENTS_BROADCAST)
+#error "This doesn't scale well! Need per-core local timers."
+#endif
+#else /* CONFIG_SMP */
+#define stop_jiffies_counter1()
+#define reload_jiffies_counter1(x)
+#define TMJC1IRQ TMJCIRQ
+#endif
+
+
+static int next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ unsigned int cpu = smp_processor_id();
+
+ if (cpu == 0) {
+ stop_jiffies_counter();
+ reload_jiffies_counter(delta - 1);
+ } else {
+ stop_jiffies_counter1();
+ reload_jiffies_counter1(delta - 1);
+ }
+ return 0;
+}
+
+static void set_clock_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ /* Nothing to do ... */
+}
+
+static DEFINE_PER_CPU(struct clock_event_device, mn10300_clockevent_device);
+static DEFINE_PER_CPU(struct irqaction, timer_irq);
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *cd;
+ unsigned int cpu = smp_processor_id();
+
+ if (cpu == 0)
+ stop_jiffies_counter();
+ else
+ stop_jiffies_counter1();
+
+ cd = &per_cpu(mn10300_clockevent_device, cpu);
+ cd->event_handler(cd);
+
+ return IRQ_HANDLED;
+}
+
+static void event_handler(struct clock_event_device *dev)
+{
+}
+
+int __init init_clockevents(void)
+{
+ struct clock_event_device *cd;
+ struct irqaction *iact;
+ unsigned int cpu = smp_processor_id();
+
+ cd = &per_cpu(mn10300_clockevent_device, cpu);
+
+ if (cpu == 0) {
+ stop_jiffies_counter();
+ cd->irq = TMJCIRQ;
+ } else {
+ stop_jiffies_counter1();
+ cd->irq = TMJC1IRQ;
+ }
+
+ cd->name = "Timestamp";
+ cd->features = CLOCK_EVT_FEAT_ONESHOT;
+
+ /* Calculate the min / max delta */
+ clockevent_set_clock(cd, MN10300_JCCLK);
+
+ cd->max_delta_ns = clockevent_delta2ns(TMJCBR_MAX, cd);
+ cd->min_delta_ns = clockevent_delta2ns(100, cd);
+
+ cd->rating = 200;
+ cd->cpumask = cpumask_of(smp_processor_id());
+ cd->set_mode = set_clock_mode;
+ cd->event_handler = event_handler;
+ cd->set_next_event = next_event;
+
+ iact = &per_cpu(timer_irq, cpu);
+ iact->flags = IRQF_DISABLED | IRQF_SHARED | IRQF_TIMER;
+ iact->handler = timer_interrupt;
+
+ clockevents_register_device(cd);
+
+#if defined(CONFIG_SMP) && !defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
+ /* setup timer irq affinity so it only runs on this cpu */
+ {
+ struct irq_desc *desc;
+ desc = irq_to_desc(cd->irq);
+ cpumask_copy(desc->affinity, cpumask_of(cpu));
+ iact->flags |= IRQF_NOBALANCING;
+ }
+#endif
+
+ if (cpu == 0) {
+ reload_jiffies_counter(MN10300_JC_PER_HZ - 1);
+ iact->name = "CPU0 Timer";
+ } else {
+ reload_jiffies_counter1(MN10300_JC_PER_HZ - 1);
+ iact->name = "CPU1 Timer";
+ }
+
+ setup_jiffies_interrupt(cd->irq, iact);
+
+ return 0;
+}
--- /dev/null
+/* MN10300 clocksource
+ *
+ * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
+ * Written by Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <asm/timex.h>
+#include "internal.h"
+
+static cycle_t mn10300_read(struct clocksource *cs)
+{
+ return read_timestamp_counter();
+}
+
+static struct clocksource clocksource_mn10300 = {
+ .name = "TSC",
+ .rating = 200,
+ .read = mn10300_read,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+int __init init_clocksource(void)
+{
+ startup_timestamp_counter();
+ clocksource_set_clock(&clocksource_mn10300, MN10300_TSCCLK);
+ clocksource_register(&clocksource_mn10300);
+ return 0;
+}
* 2 of the Licence, or (at your option) any later version.
*/
+struct clocksource;
+struct clock_event_device;
+
/*
* kthread.S
*/
* time.c
*/
extern irqreturn_t local_timer_interrupt(void);
+
+/*
+ * time.c
+ */
+#ifdef CONFIG_CEVT_MN10300
+extern void clockevent_set_clock(struct clock_event_device *, unsigned int);
+#endif
+#ifdef CONFIG_CSRC_MN10300
+extern void clocksource_set_clock(struct clocksource *, unsigned int);
+#endif
#include <asm/setup.h>
#include <asm/serial-regs.h>
-#ifdef CONFIG_SMP
-#undef GxICR
-#define GxICR(X) CROSS_GxICR(X, irq_affinity_online[X])
-
-#undef GxICR_u8
-#define GxICR_u8(X) CROSS_GxICR_u8(X, irq_affinity_online[X])
-#endif /* CONFIG_SMP */
-
unsigned long __mn10300_irq_enabled_epsw[NR_CPUS] __cacheline_aligned_in_smp = {
[0 ... NR_CPUS - 1] = EPSW_IE | EPSW_IM_7
};
GxICR(irq) = (tmp & GxICR_LEVEL);
tmp2 = GxICR(irq);
- irq_affinity_online[irq] = any_online_cpu(*irq_desc[irq].affinity);
- GxICR(irq) = (tmp & (GxICR_LEVEL | GxICR_ENABLE)) | GxICR_DETECT;
- tmp = GxICR(irq);
+ irq_affinity_online[irq] =
+ any_online_cpu(*irq_desc[irq].affinity);
+ CROSS_GxICR(irq, irq_affinity_online[irq]) =
+ (tmp & (GxICR_LEVEL | GxICR_ENABLE)) | GxICR_DETECT;
+ tmp = CROSS_GxICR(irq, irq_affinity_online[irq]);
}
arch_local_irq_restore(flags);
tmp = GxICR(irq);
irq_affinity_online[irq] = any_online_cpu(*irq_desc[irq].affinity);
- GxICR(irq) = (tmp & GxICR_LEVEL) | GxICR_ENABLE | GxICR_DETECT;
- tmp = GxICR(irq);
+ CROSS_GxICR(irq, irq_affinity_online[irq]) = (tmp & GxICR_LEVEL) | GxICR_ENABLE | GxICR_DETECT;
+ tmp = CROSS_GxICR(irq, irq_affinity_online[irq]);
}
arch_local_irq_restore(flags);
.unmask = mn10300_cpupic_unmask_clear,
#ifdef CONFIG_SMP
.set_affinity = mn10300_cpupic_setaffinity,
-#endif /* CONFIG_SMP */
+#endif
};
/*
.unmask = mn10300_cpupic_unmask,
#ifdef CONFIG_SMP
.set_affinity = mn10300_cpupic_setaffinity,
-#endif /* CONFIG_SMP */
+#endif
};
/*
if (irq_affinity_online[irq] == self) {
u16 x, tmp;
- x = CROSS_GxICR(irq, self);
- CROSS_GxICR(irq, self) = x & GxICR_LEVEL;
- tmp = CROSS_GxICR(irq, self);
+ x = GxICR(irq);
+ GxICR(irq) = x & GxICR_LEVEL;
+ tmp = GxICR(irq);
new = any_online_cpu(irq_desc[irq].affinity);
irq_affinity_online[irq] = new;
tmp = CROSS_GxICR(irq, new);
x &= GxICR_LEVEL | GxICR_ENABLE;
- if (CROSS_GxICR(irq, self) & GxICR_REQUEST)
+ if (GxICR(irq) & GxICR_REQUEST) {
x |= GxICR_REQUEST | GxICR_DETECT;
CROSS_GxICR(irq, new) = x;
tmp = CROSS_GxICR(irq, new);
static irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id);
static irqreturn_t smp_call_function_interrupt(int irq, void *dev_id);
-static irqreturn_t smp_ipi_timer_interrupt(int irq, void *dev_id);
static struct irqaction reschedule_ipi = {
.handler = smp_reschedule_interrupt,
.handler = smp_call_function_interrupt,
.name = "smp call function IPI"
};
+
+#if !defined(CONFIG_GENERIC_CLOCKEVENTS) || defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
+static irqreturn_t smp_ipi_timer_interrupt(int irq, void *dev_id);
static struct irqaction local_timer_ipi = {
.handler = smp_ipi_timer_interrupt,
.flags = IRQF_DISABLED,
.name = "smp local timer IPI"
};
+#endif
/**
* init_ipi - Initialise the IPI mechanism
mn10300_ipi_enable(CALL_FUNC_SINGLE_IPI);
/* set up the local timer IPI */
+#if !defined(CONFIG_GENERIC_CLOCKEVENTS) || \
+ defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
set_irq_chip_and_handler(LOCAL_TIMER_IPI,
&mn10300_ipi_type, handle_percpu_irq);
setup_irq(LOCAL_TIMER_IPI, &local_timer_ipi);
set_intr_level(LOCAL_TIMER_IPI, LOCAL_TIMER_GxICR_LV);
mn10300_ipi_enable(LOCAL_TIMER_IPI);
+#endif
#ifdef CONFIG_MN10300_CACHE_ENABLED
/* set up the cache flush IPI */
}
}
+#if !defined(CONFIG_GENERIC_CLOCKEVENTS) || \
+ defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
/**
* smp_ipi_timer_interrupt - Local timer IPI handler
* @irq: The interrupt number.
{
return local_timer_interrupt();
}
+#endif
void __init smp_init_cpus(void)
{
int __init start_secondary(void *unused)
{
smp_cpu_init();
-
smp_callin();
while (!cpu_isset(smp_processor_id(), smp_commenced_mask))
cpu_relax();
preempt_disable();
smp_online();
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+ init_clockevents();
+#endif
cpu_idle();
return 0;
}
#include <linux/smp.h>
#include <linux/profile.h>
#include <linux/cnt32_to_63.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
#include <asm/irq.h>
#include <asm/div64.h>
#include <asm/processor.h>
static unsigned long mn10300_last_tsc; /* time-stamp counter at last time
* interrupt occurred */
-static irqreturn_t timer_interrupt(int irq, void *dev_id);
-
-static struct irqaction timer_irq = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_SHARED | IRQF_TIMER,
- .name = "timer",
-};
-
static unsigned long sched_clock_multiplier;
/*
/* read the TSC value
*/
- tsc = 0 - get_cycles(); /* get_cycles() counts down */
+ tsc = get_cycles();
/* expand to 64-bits.
* - sched_clock() must be called once a minute or better or the
return IRQ_HANDLED;
}
+#ifndef CONFIG_GENERIC_TIME
/*
* advance the kernel's time keeping clocks (xtime and jiffies)
* - we use Timer 0 & 1 cascaded as a clock to nudge us the next time
write_seqlock(&xtime_lock);
while (tsc = get_cycles(),
- elapse = mn10300_last_tsc - tsc, /* time elapsed since last
+ elapse = tsc - mn10300_last_tsc, /* time elapsed since last
* tick */
elapse > MN10300_TSC_PER_HZ
) {
- mn10300_last_tsc -= MN10300_TSC_PER_HZ;
+ mn10300_last_tsc += MN10300_TSC_PER_HZ;
/* advance the kernel's time tracking system */
do_timer(1);
return ret;
}
+static struct irqaction timer_irq = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_SHARED | IRQF_TIMER,
+ .name = "timer",
+};
+#endif /* CONFIG_GENERIC_TIME */
+
+#ifdef CONFIG_CSRC_MN10300
+void __init clocksource_set_clock(struct clocksource *cs, unsigned int clock)
+{
+ u64 temp;
+ u32 shift;
+
+ /* Find a shift value */
+ for (shift = 32; shift > 0; shift--) {
+ temp = (u64) NSEC_PER_SEC << shift;
+ do_div(temp, clock);
+ if ((temp >> 32) == 0)
+ break;
+ }
+ cs->shift = shift;
+ cs->mult = (u32) temp;
+}
+#endif
+
+#if CONFIG_CEVT_MN10300
+void __cpuinit clockevent_set_clock(struct clock_event_device *cd,
+ unsigned int clock)
+{
+ u64 temp;
+ u32 shift;
+
+ /* Find a shift value */
+ for (shift = 32; shift > 0; shift--) {
+ temp = (u64) clock << shift;
+ do_div(temp, NSEC_PER_SEC);
+ if ((temp >> 32) == 0)
+ break;
+ }
+ cd->shift = shift;
+ cd->mult = (u32) temp;
+}
+#endif
+
/*
* initialise the various timers used by the main part of the kernel
*/
*/
TMPSCNT |= TMPSCNT_ENABLE;
+#ifdef CONFIG_GENERIC_TIME
+ init_clocksource();
+#else
startup_timestamp_counter();
+#endif
printk(KERN_INFO
"timestamp counter I/O clock running at %lu.%02lu"
" (calibrated against RTC)\n",
MN10300_TSCCLK / 1000000, (MN10300_TSCCLK / 10000) % 100);
- mn10300_last_tsc = TMTSCBC;
+ mn10300_last_tsc = read_timestamp_counter();
- /* use timer 0 & 1 cascaded to tick at as close to HZ as possible */
- setup_irq(TMJCIRQ, &timer_irq);
-
- set_intr_level(TMJCIRQ, NUM2GxICR_LEVEL(CONFIG_TIMER_IRQ_LEVEL));
-
- startup_jiffies_counter();
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+ init_clockevents();
+#else
+ reload_jiffies_counter(MN10300_JC_PER_HZ - 1);
+ setup_jiffies_interrupt(TMJCIRQ, &timer_irq, CONFIG_TIMER_IRQ_LEVEL);
+#endif
#ifdef CONFIG_MN10300_WD_TIMER
/* start the watchdog timer */
/* ASB2303-specific timer specifications
*
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2007, 2010 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
*/
#define TMJCBR_MAX 0xffff
-#define TMJCBC TM01BC
-
-#define TMJCMD TM01MD
-#define TMJCBR TM01BR
#define TMJCIRQ TM1IRQ
#define TMJCICR TM1ICR
#define MN10300_JC_PER_HZ ((MN10300_JCCLK + HZ / 2) / HZ)
#define MN10300_TSC_PER_HZ ((MN10300_TSCCLK + HZ / 2) / HZ)
-static inline void startup_jiffies_counter(void)
+static inline void stop_jiffies_counter(void)
{
- u16 md, t16;
+ u16 tmp;
+ TM01MD = JC_TIMER_CLKSRC | TM1MD_SRC_TM0CASCADE << 8;
+ tmp = TM01MD;
+}
- md = JC_TIMER_CLKSRC;
- TMJCBR = MN10300_JC_PER_HZ - 1;
- t16 = TMJCBR;
+static inline void reload_jiffies_counter(u32 cnt)
+{
+ u32 tmp;
- TMJCMD =
- md |
- TM1MD_SRC_TM0CASCADE << 8 |
- TM0MD_INIT_COUNTER |
- TM1MD_INIT_COUNTER << 8;
+ TM01BR = cnt;
+ tmp = TM01BR;
- TMJCMD =
- md |
- TM1MD_SRC_TM0CASCADE << 8 |
- TM0MD_COUNT_ENABLE |
- TM1MD_COUNT_ENABLE << 8;
+ TM01MD = JC_TIMER_CLKSRC | \
+ TM1MD_SRC_TM0CASCADE << 8 | \
+ TM0MD_INIT_COUNTER | \
+ TM1MD_INIT_COUNTER << 8;
- t16 = TMJCMD;
- TMJCICR |= GxICR_ENABLE | GxICR_DETECT | GxICR_REQUEST;
- t16 = TMJCICR;
-}
+ TM01MD = JC_TIMER_CLKSRC | \
+ TM1MD_SRC_TM0CASCADE << 8 | \
+ TM0MD_COUNT_ENABLE | \
+ TM1MD_COUNT_ENABLE << 8;
-static inline void shutdown_jiffies_counter(void)
-{
+ tmp = TM01MD;
}
#endif /* !__ASSEMBLY__ */
static inline cycles_t read_timestamp_counter(void)
{
- return (cycles_t)TMTSCBC;
+ return (cycles_t)~TMTSCBC;
}
#endif /* !__ASSEMBLY__ */
/* ASB2305-specific timer specifications
*
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2007, 2010 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
*/
#define TMJCBR_MAX 0xffff
-#define TMJCBC TM01BC
-
-#define TMJCMD TM01MD
-#define TMJCBR TM01BR
#define TMJCIRQ TM1IRQ
#define TMJCICR TM1ICR
#define MN10300_JC_PER_HZ ((MN10300_JCCLK + HZ / 2) / HZ)
#define MN10300_TSC_PER_HZ ((MN10300_TSCCLK + HZ / 2) / HZ)
-static inline void startup_jiffies_counter(void)
+static inline void stop_jiffies_counter(void)
{
- u16 md, t16;
+ u16 tmp;
+ TM01MD = JC_TIMER_CLKSRC | TM1MD_SRC_TM0CASCADE << 8;
+ tmp = TM01MD;
+}
- md = JC_TIMER_CLKSRC;
- TMJCBR = MN10300_JC_PER_HZ - 1;
- t16 = TMJCBR;
+static inline void reload_jiffies_counter(u32 cnt)
+{
+ u32 tmp;
- TMJCMD =
- md |
- TM1MD_SRC_TM0CASCADE << 8 |
- TM0MD_INIT_COUNTER |
- TM1MD_INIT_COUNTER << 8;
+ TM01BR = cnt;
+ tmp = TM01BR;
- TMJCMD =
- md |
- TM1MD_SRC_TM0CASCADE << 8 |
- TM0MD_COUNT_ENABLE |
- TM1MD_COUNT_ENABLE << 8;
+ TM01MD = JC_TIMER_CLKSRC | \
+ TM1MD_SRC_TM0CASCADE << 8 | \
+ TM0MD_INIT_COUNTER | \
+ TM1MD_INIT_COUNTER << 8;
- t16 = TMJCMD;
- TMJCICR |= GxICR_ENABLE | GxICR_DETECT | GxICR_REQUEST;
- t16 = TMJCICR;
-}
+ TM01MD = JC_TIMER_CLKSRC | \
+ TM1MD_SRC_TM0CASCADE << 8 | \
+ TM0MD_COUNT_ENABLE | \
+ TM1MD_COUNT_ENABLE << 8;
-static inline void shutdown_jiffies_counter(void)
-{
+ tmp = TM01MD;
}
#endif /* !__ASSEMBLY__ */
static inline cycles_t read_timestamp_counter(void)
{
- return (cycles_t)TMTSCBC;
+ return (cycles_t)~TMTSCBC;
}
#endif /* !__ASSEMBLY__ */
/* timex.h: MN2WS0038 architecture timer specifications
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2010 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
*/
#define TMJCBR_MAX 0xffffff /* 24bit */
-#define TMJCBC TMTBC
-
-#define TMJCMD TMTMD
-#define TMJCBR TMTBR
#define TMJCIRQ TMTIRQ
-#define TMJCICR TMTICR
#ifndef __ASSEMBLY__
# error MTM tick timer interval value is overflow.
#endif
+static inline void stop_jiffies_counter(void)
+{
+ u16 tmp;
+ TMTMD = 0;
+ tmp = TMTMD;
+}
-static inline void startup_jiffies_counter(void)
+static inline void reload_jiffies_counter(u32 cnt)
{
- u32 sync;
+ u32 tmp;
+
+ TMTBR = cnt;
+ tmp = TMTBR;
- TMJCBR = MN10300_JC_PER_HZ - 1;
- sync = TMJCBR;
+ TMTMD = TMTMD_TMTLDE;
+ TMTMD = TMTMD_TMTCNE;
+ tmp = TMTMD;
+}
- TMJCMD = TMTMD_TMTLDE;
- TMJCMD = TMTMD_TMTCNE;
- sync = TMJCMD;
+#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_CLOCKEVENTS) && \
+ !defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
+/*
+ * If we aren't using broadcasting, each core needs its own event timer.
+ * Since CPU0 uses the tick timer which is 24-bits, we use timer 4 & 5
+ * cascaded to 32-bits for CPU1 (but only really use 24-bits to match
+ * CPU0).
+ */
- TMJCICR |= GxICR_ENABLE | GxICR_DETECT | GxICR_REQUEST;
- sync = TMJCICR;
+#define TMJC1IRQ TM5IRQ
+
+static inline void stop_jiffies_counter1(void)
+{
+ u8 tmp;
+ TM4MD = 0;
+ TM5MD = 0;
+ tmp = TM4MD;
+ tmp = TM5MD;
}
-static inline void shutdown_jiffies_counter(void)
+static inline void reload_jiffies_counter1(u32 cnt)
{
+ u32 tmp;
+
+ TM45BR = cnt;
+ tmp = TM45BR;
+
+ TM4MD = TM4MD_INIT_COUNTER;
+ tmp = TM4MD;
+
+ TM5MD = TM5MD_SRC_TM4CASCADE | TM5MD_INIT_COUNTER;
+ TM5MD = TM5MD_SRC_TM4CASCADE | TM5MD_COUNT_ENABLE;
+ tmp = TM5MD;
+
+ TM4MD = TM4MD_COUNT_ENABLE;
+ tmp = TM4MD;
}
+#endif /* CONFIG_SMP&GENERIC_CLOCKEVENTS&!GENERIC_CLOCKEVENTS_BROADCAST */
#endif /* !__ASSEMBLY__ */
/*
* timestamp counter specifications
*/
-
#define TMTSCBR_MAX 0xffffffff
+
+#ifndef __ASSEMBLY__
+
+/* Use 32-bit timestamp counter */
#define TMTSCMD TMSMD
#define TMTSCBR TMSBR
#define TMTSCBC TMSBC
#define TMTSCICR TMSICR
-#ifndef __ASSEMBLY__
-
static inline void startup_timestamp_counter(void)
{
u32 sync;
static inline cycles_t read_timestamp_counter(void)
{
- return (cycles_t)TMTSCBC;
+ return (cycles_t)~TMTSCBC;
}
#endif /* !__ASSEMBLY__ */
projects / platform / kernel / linux-arm64.git / commitdiff