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authorLinus Torvalds <torvalds@linux-foundation.org>2008-03-26 18:35:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-26 18:35:22 -0700
commitd55a4528f7f607ca2872fec18574bc8cec060f05 (patch)
treed7fa9184df280c53efaf5a73d648a255ed142196 /arch/sparc64/kernel/time.c
parent08dcf29e01dcb786c13dc80045bd65f804117efb (diff)
parentc101b088ba0ed16d7109b2f3c2d16798d162a535 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Define TASK_SIZE_OF() [SPARC64]: flush_ptrace_access() needs preemption disable. [SPARC64]: Update defconfig. [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks. [SPARC64]: Fix __get_cpu_var in preemption-enabled area. [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.c [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.c [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.c [SPARC64]: Adjust {TLBTEMP,TSBMAP}_BASE. [SPARC64]: Make save_stack_trace() more efficient.
Diffstat (limited to 'arch/sparc64/kernel/time.c')
-rw-r--r--arch/sparc64/kernel/time.c66
1 files changed, 40 insertions, 26 deletions
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index d204f1ab1d4c..e5d238970c7e 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -1,7 +1,6 @@
-/* $Id: time.c,v 1.42 2002/01/23 14:33:55 davem Exp $
- * time.c: UltraSparc timer and TOD clock support.
+/* time.c: UltraSparc timer and TOD clock support.
*
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1997, 2008 David S. Miller (davem@davemloft.net)
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
*
* Based largely on code which is:
@@ -48,6 +47,8 @@
#include <asm/uaccess.h>
#include <asm/irq_regs.h>
+#include "entry.h"
+
DEFINE_SPINLOCK(mostek_lock);
DEFINE_SPINLOCK(rtc_lock);
void __iomem *mstk48t02_regs = NULL;
@@ -508,6 +509,37 @@ static int __init has_low_battery(void)
return (data1 == data2); /* Was the write blocked? */
}
+static void __init mostek_set_system_time(void __iomem *mregs)
+{
+ unsigned int year, mon, day, hour, min, sec;
+ u8 tmp;
+
+ spin_lock_irq(&mostek_lock);
+
+ /* Traditional Mostek chip. */
+ tmp = mostek_read(mregs + MOSTEK_CREG);
+ tmp |= MSTK_CREG_READ;
+ mostek_write(mregs + MOSTEK_CREG, tmp);
+
+ sec = MSTK_REG_SEC(mregs);
+ min = MSTK_REG_MIN(mregs);
+ hour = MSTK_REG_HOUR(mregs);
+ day = MSTK_REG_DOM(mregs);
+ mon = MSTK_REG_MONTH(mregs);
+ year = MSTK_CVT_YEAR( MSTK_REG_YEAR(mregs) );
+
+ xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
+ xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
+ set_normalized_timespec(&wall_to_monotonic,
+ -xtime.tv_sec, -xtime.tv_nsec);
+
+ tmp = mostek_read(mregs + MOSTEK_CREG);
+ tmp &= ~MSTK_CREG_READ;
+ mostek_write(mregs + MOSTEK_CREG, tmp);
+
+ spin_unlock_irq(&mostek_lock);
+}
+
/* Probe for the real time clock chip. */
static void __init set_system_time(void)
{
@@ -520,7 +552,6 @@ static void __init set_system_time(void)
unsigned long dregs = 0UL;
void __iomem *bregs = 0UL;
#endif
- u8 tmp;
if (!mregs && !dregs && !bregs) {
prom_printf("Something wrong, clock regs not mapped yet.\n");
@@ -528,20 +559,11 @@ static void __init set_system_time(void)
}
if (mregs) {
- spin_lock_irq(&mostek_lock);
-
- /* Traditional Mostek chip. */
- tmp = mostek_read(mregs + MOSTEK_CREG);
- tmp |= MSTK_CREG_READ;
- mostek_write(mregs + MOSTEK_CREG, tmp);
+ mostek_set_system_time(mregs);
+ return;
+ }
- sec = MSTK_REG_SEC(mregs);
- min = MSTK_REG_MIN(mregs);
- hour = MSTK_REG_HOUR(mregs);
- day = MSTK_REG_DOM(mregs);
- mon = MSTK_REG_MONTH(mregs);
- year = MSTK_CVT_YEAR( MSTK_REG_YEAR(mregs) );
- } else if (bregs) {
+ if (bregs) {
unsigned char val = readb(bregs + 0x0e);
unsigned int century;
@@ -596,14 +618,6 @@ static void __init set_system_time(void)
xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
-
- if (mregs) {
- tmp = mostek_read(mregs + MOSTEK_CREG);
- tmp &= ~MSTK_CREG_READ;
- mostek_write(mregs + MOSTEK_CREG, tmp);
-
- spin_unlock_irq(&mostek_lock);
- }
}
/* davem suggests we keep this within the 4M locked kernel image */
@@ -1027,7 +1041,7 @@ void __init time_init(void)
setup_clockevent_multiplier(clock);
sparc64_clockevent.max_delta_ns =
- clockevent_delta2ns(0x7fffffffffffffff, &sparc64_clockevent);
+ clockevent_delta2ns(0x7fffffffffffffffUL, &sparc64_clockevent);
sparc64_clockevent.min_delta_ns =
clockevent_delta2ns(0xF, &sparc64_clockevent);