MN10300: And Panasonic AM34 subarch and implement SMP
Implement the Panasonic MN10300 AM34 CPU subarch and implement SMP support for
MN10300. Also implement support for the MN2WS0060 processor and the ASB2364
evaluation board which are AM34 based.
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/arch/mn10300/kernel/time.c b/arch/mn10300/kernel/time.c
index 0b5c856..0cb9bdb 100644
--- a/arch/mn10300/kernel/time.c
+++ b/arch/mn10300/kernel/time.c
@@ -22,12 +22,7 @@
#include <asm/processor.h>
#include <asm/intctl-regs.h>
#include <asm/rtc.h>
-
-#ifdef CONFIG_MN10300_RTC
-unsigned long mn10300_ioclk; /* system I/O clock frequency */
-unsigned long mn10300_iobclk; /* system I/O clock frequency */
-unsigned long mn10300_tsc_per_HZ; /* number of ioclks per jiffy */
-#endif /* CONFIG_MN10300_RTC */
+#include "internal.h"
static unsigned long mn10300_last_tsc; /* time-stamp counter at last time
* interrupt occurred */
@@ -95,6 +90,19 @@
__muldiv64u(NSEC_PER_SEC, 1 << 16, MN10300_TSCCLK);
}
+/**
+ * local_timer_interrupt - Local timer interrupt handler
+ *
+ * Handle local timer interrupts for this CPU. They may have been propagated
+ * to this CPU from the CPU that actually gets them by way of an IPI.
+ */
+irqreturn_t local_timer_interrupt(void)
+{
+ profile_tick(CPU_PROFILING);
+ update_process_times(user_mode(get_irq_regs()));
+ return IRQ_HANDLED;
+}
+
/*
* 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
@@ -103,6 +111,7 @@
static irqreturn_t timer_interrupt(int irq, void *dev_id)
{
unsigned tsc, elapse;
+ irqreturn_t ret;
write_seqlock(&xtime_lock);
@@ -114,15 +123,16 @@
mn10300_last_tsc -= MN10300_TSC_PER_HZ;
/* advance the kernel's time tracking system */
- profile_tick(CPU_PROFILING);
do_timer(1);
}
write_sequnlock(&xtime_lock);
- update_process_times(user_mode(get_irq_regs()));
-
- return IRQ_HANDLED;
+ ret = local_timer_interrupt();
+#ifdef CONFIG_SMP
+ send_IPI_allbutself(LOCAL_TIMER_IPI);
+#endif
+ return ret;
}
/*
@@ -148,7 +158,7 @@
/* use timer 0 & 1 cascaded to tick at as close to HZ as possible */
setup_irq(TMJCIRQ, &timer_irq);
- set_intr_level(TMJCIRQ, TMJCICR_LEVEL);
+ set_intr_level(TMJCIRQ, NUM2GxICR_LEVEL(CONFIG_TIMER_IRQ_LEVEL));
startup_jiffies_counter();