ARC: RIP broken 64bit RTSC
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index dbe74f4..9307f87 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -26,6 +26,7 @@
* while TIMER1 for free running (clocksource)
*
* Newer ARC700 cores have 64bit clk fetching RTSC insn, preferred over TIMER1
+ * which however is currently broken
*/
#include <linux/spinlock.h>
@@ -59,52 +60,6 @@
/********** Clock Source Device *********/
-#ifdef CONFIG_ARC_HAS_RTSC
-
-int arc_counter_setup(void)
-{
- /*
- * For SMP this needs to be 0. However Kconfig glue doesn't
- * enable this option for SMP configs
- */
- return 1;
-}
-
-static cycle_t arc_counter_read(struct clocksource *cs)
-{
- unsigned long flags;
- union {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- struct { u32 high, low; };
-#else
- struct { u32 low, high; };
-#endif
- cycle_t full;
- } stamp;
-
- flags = arch_local_irq_save();
-
- __asm__ __volatile(
- " .extCoreRegister tsch, 58, r, cannot_shortcut \n"
- " rtsc %0, 0 \n"
- " mov %1, 0 \n"
- : "=r" (stamp.low), "=r" (stamp.high));
-
- arch_local_irq_restore(flags);
-
- return stamp.full;
-}
-
-static struct clocksource arc_counter = {
- .name = "ARC RTSC",
- .rating = 300,
- .read = arc_counter_read,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-#else /* !CONFIG_ARC_HAS_RTSC */
-
static bool is_usable_as_clocksource(void)
{
#ifdef CONFIG_SMP
@@ -139,8 +94,6 @@
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-#endif
-
/********** Clock Event Device *********/
/*