[PATCH 06/13] m68k: split heartbeat out of timer function

Arnd Bergmann
2020-10-08T15:46:44Z

The heartbeat functionality is mostly separate from the
actual timer interrupt handling, and it is only used on
five platforms.

Split it out into a separate function and call that directly
from the timer irq on those platforms.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/m68k/amiga/config.c | 1 +
arch/m68k/apollo/config.c | 1 +
arch/m68k/atari/time.c | 2 ++
arch/m68k/hp300/time.c | 1 +
arch/m68k/include/asm/machdep.h | 7 +++++++
arch/m68k/kernel/time.c | 7 +++++--
arch/m68k/q40/q40ints.c | 2 ++
7 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c
index bee9f240f35d..29f92333119e 100644
--- a/arch/m68k/amiga/config.c
+++ b/arch/m68k/amiga/config.c
@@ -480,6 +480,7 @@ static irqreturn_t ciab_timer_handler(int irq, void *dev_id)
clk_total += jiffy_ticks;
clk_offset = 0;
timer_routine(0, NULL);
+ timer_heartbeat();

return IRQ_HANDLED;
}
diff --git a/arch/m68k/apollo/config.c b/arch/m68k/apollo/config.c
index 762da5d7a415..30915f1a8760 100644
--- a/arch/m68k/apollo/config.c
+++ b/arch/m68k/apollo/config.c
@@ -173,6 +173,7 @@ irqreturn_t dn_timer_int(int irq, void *dev_id)
volatile unsigned char x;

timer_handler(irq, dev_id);
+ timer_heartbeat();

x = *(volatile unsigned char *)(apollo_timer + 3);
x = *(volatile unsigned char *)(apollo_timer + 5);
diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
index ce923a523695..ce4a5961ca93 100644
--- a/arch/m68k/atari/time.c
+++ b/arch/m68k/atari/time.c
@@ -21,6 +21,7 @@
#include <linux/export.h>

#include <asm/atariints.h>
+#include <asm/machdep.h>

DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL_GPL(rtc_lock);
@@ -49,6 +50,7 @@ static irqreturn_t mfp_timer_c_handler(int irq, void *dev_id)
} while (last_timer_count = 1);
clk_total += INT_TICKS;
timer_routine(0, NULL);
+ timer_heartbeat();
local_irq_restore(flags);

return IRQ_HANDLED;
diff --git a/arch/m68k/hp300/time.c b/arch/m68k/hp300/time.c
index bfee13e1d0fe..e3cd938de0f9 100644
--- a/arch/m68k/hp300/time.c
+++ b/arch/m68k/hp300/time.c
@@ -65,6 +65,7 @@ static irqreturn_t hp300_tick(int irq, void *dev_id)
clk_total += INTVAL;
clk_offset = 0;
timer_routine(0, NULL);
+ timer_heartbeat();
local_irq_restore(flags);

/* Turn off the network and SCSI leds */
diff --git a/arch/m68k/include/asm/machdep.h b/arch/m68k/include/asm/machdep.h
index 49bd3266b4b1..e62a39d01ae4 100644
--- a/arch/m68k/include/asm/machdep.h
+++ b/arch/m68k/include/asm/machdep.h
@@ -35,6 +35,13 @@ extern void (*mach_beep) (unsigned int, unsigned int);
/* Hardware clock functions */
extern void hw_timer_init(irq_handler_t handler);
extern unsigned long hw_timer_offset(void);
+#ifdef CONFIG_HEARTBEAT
+extern void timer_heartbeat(void);
+#else
+static inline void timer_heartbeat(void)
+{
+}
+#endif

extern void config_BSP(char *command, int len);

diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index c2697a4d4ddd..c05cec21b05f 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -45,8 +45,12 @@ static irqreturn_t timer_interrupt(int irq, void *dummy)
xtime_update(1);
update_process_times(user_mode(get_irq_regs()));
profile_tick(CPU_PROFILING);
+ return IRQ_HANDLED;
+}

#ifdef CONFIG_HEARTBEAT
+void timer_heartbeat(void)
+{
/* use power LED as a heartbeat instead -- much more useful
for debugging -- based on the version for PReP by Cort */
/* acts like an actual heart beat -- ie thump-thump-pause... */
@@ -68,9 +72,8 @@ static irqreturn_t timer_interrupt(int irq, void *dummy)
dist = period / 4;
}
}
-#endif /* CONFIG_HEARTBEAT */
- return IRQ_HANDLED;
}
+#endif /* CONFIG_HEARTBEAT */

#ifdef CONFIG_M68KCLASSIC
#if !IS_BUILTIN(CONFIG_RTC_DRV_GENERIC)
diff --git a/arch/m68k/q40/q40ints.c b/arch/m68k/q40/q40ints.c
index 1c696906c159..b01b545a2db0 100644
--- a/arch/m68k/q40/q40ints.c
+++ b/arch/m68k/q40/q40ints.c
@@ -17,6 +17,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>

+#include <asm/machdep.h>
#include <asm/ptrace.h>
#include <asm/traps.h>

@@ -144,6 +145,7 @@ static irqreturn_t q40_timer_int(int irq, void *dev_id)

local_irq_save(flags);
timer_routine(0, NULL);
+ timer_heartbeat();
local_irq_restore(flags);
}
return IRQ_HANDLED;
--
2.27.0