powerpc: Remove FW_FEATURE ISERIES from arch code
This is no longer selectable, so just remove all the dependent code.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index f81c81b..2c42cd7 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -17,8 +17,7 @@
*
* TODO (not necessarily in this file):
* - improve precision and reproducibility of timebase frequency
- * measurement at boot time. (for iSeries, we calibrate the timebase
- * against the Titan chip's clock.)
+ * measurement at boot time.
* - for astronomical applications: add a new function to get
* non ambiguous timestamps even around leap seconds. This needs
* a new timestamp format and a good name.
@@ -70,10 +69,6 @@
#include <asm/vdso_datapage.h>
#include <asm/firmware.h>
#include <asm/cputime.h>
-#ifdef CONFIG_PPC_ISERIES
-#include <asm/iseries/it_lp_queue.h>
-#include <asm/iseries/hv_call_xm.h>
-#endif
/* powerpc clocksource/clockevent code */
@@ -117,14 +112,6 @@
DEFINE_PER_CPU(u64, decrementers_next_tb);
static DEFINE_PER_CPU(struct clock_event_device, decrementers);
-#ifdef CONFIG_PPC_ISERIES
-static unsigned long __initdata iSeries_recal_titan;
-static signed long __initdata iSeries_recal_tb;
-
-/* Forward declaration is only needed for iSereis compiles */
-static void __init clocksource_init(void);
-#endif
-
#define XSEC_PER_SEC (1024*1024)
#ifdef CONFIG_PPC64
@@ -423,74 +410,6 @@
EXPORT_SYMBOL(profile_pc);
#endif
-#ifdef CONFIG_PPC_ISERIES
-
-/*
- * This function recalibrates the timebase based on the 49-bit time-of-day
- * value in the Titan chip. The Titan is much more accurate than the value
- * returned by the service processor for the timebase frequency.
- */
-
-static int __init iSeries_tb_recal(void)
-{
- unsigned long titan, tb;
-
- /* Make sure we only run on iSeries */
- if (!firmware_has_feature(FW_FEATURE_ISERIES))
- return -ENODEV;
-
- tb = get_tb();
- titan = HvCallXm_loadTod();
- if ( iSeries_recal_titan ) {
- unsigned long tb_ticks = tb - iSeries_recal_tb;
- unsigned long titan_usec = (titan - iSeries_recal_titan) >> 12;
- unsigned long new_tb_ticks_per_sec = (tb_ticks * USEC_PER_SEC)/titan_usec;
- unsigned long new_tb_ticks_per_jiffy =
- DIV_ROUND_CLOSEST(new_tb_ticks_per_sec, HZ);
- long tick_diff = new_tb_ticks_per_jiffy - tb_ticks_per_jiffy;
- char sign = '+';
- /* make sure tb_ticks_per_sec and tb_ticks_per_jiffy are consistent */
- new_tb_ticks_per_sec = new_tb_ticks_per_jiffy * HZ;
-
- if ( tick_diff < 0 ) {
- tick_diff = -tick_diff;
- sign = '-';
- }
- if ( tick_diff ) {
- if ( tick_diff < tb_ticks_per_jiffy/25 ) {
- printk( "Titan recalibrate: new tb_ticks_per_jiffy = %lu (%c%ld)\n",
- new_tb_ticks_per_jiffy, sign, tick_diff );
- tb_ticks_per_jiffy = new_tb_ticks_per_jiffy;
- tb_ticks_per_sec = new_tb_ticks_per_sec;
- calc_cputime_factors();
- vdso_data->tb_ticks_per_sec = tb_ticks_per_sec;
- setup_cputime_one_jiffy();
- }
- else {
- printk( "Titan recalibrate: FAILED (difference > 4 percent)\n"
- " new tb_ticks_per_jiffy = %lu\n"
- " old tb_ticks_per_jiffy = %lu\n",
- new_tb_ticks_per_jiffy, tb_ticks_per_jiffy );
- }
- }
- }
- iSeries_recal_titan = titan;
- iSeries_recal_tb = tb;
-
- /* Called here as now we know accurate values for the timebase */
- clocksource_init();
- return 0;
-}
-late_initcall(iSeries_tb_recal);
-
-/* Called from platform early init */
-void __init iSeries_time_init_early(void)
-{
- iSeries_recal_tb = get_tb();
- iSeries_recal_titan = HvCallXm_loadTod();
-}
-#endif /* CONFIG_PPC_ISERIES */
-
#ifdef CONFIG_IRQ_WORK
/*
@@ -547,16 +466,6 @@
#endif /* CONFIG_IRQ_WORK */
/*
- * For iSeries shared processors, we have to let the hypervisor
- * set the hardware decrementer. We set a virtual decrementer
- * in the lppaca and call the hypervisor if the virtual
- * decrementer is less than the current value in the hardware
- * decrementer. (almost always the new decrementer value will
- * be greater than the current hardware decementer so the hypervisor
- * call will not be needed)
- */
-
-/*
* timer_interrupt - gets called when the decrementer overflows,
* with interrupts disabled.
*/
@@ -599,20 +508,10 @@
irq_work_run();
}
-#ifdef CONFIG_PPC_ISERIES
- if (firmware_has_feature(FW_FEATURE_ISERIES))
- get_lppaca()->int_dword.fields.decr_int = 0;
-#endif
-
*next_tb = ~(u64)0;
if (evt->event_handler)
evt->event_handler(evt);
-#ifdef CONFIG_PPC_ISERIES
- if (firmware_has_feature(FW_FEATURE_ISERIES) && hvlpevent_is_pending())
- process_hvlpevents();
-#endif
-
#ifdef CONFIG_PPC64
/* collect purr register values often, for accurate calculations */
if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
@@ -984,9 +883,8 @@
*/
start_cpu_decrementer();
- /* Register the clocksource, if we're not running on iSeries */
- if (!firmware_has_feature(FW_FEATURE_ISERIES))
- clocksource_init();
+ /* Register the clocksource */
+ clocksource_init();
init_decrementer_clockevent();
}