[PATCH 4/5][time][x86_64] Convert x86_64 to use GENERIC_TIME
This patch converts x86_64 to use the GENERIC_TIME infrastructure and
adds clocksource structures for both TSC and HPET (ACPI PM is shared w/
i386).
Signed-off-by: John Stultz <[EMAIL PROTECTED]>
arch/x86_64/Kconfig|4
arch/x86_64/kernel/apic.c |2
arch/x86_64/kernel/hpet.c | 65
arch/x86_64/kernel/pmtimer.c | 58 ---
arch/x86_64/kernel/smpboot.c |1
arch/x86_64/kernel/time.c | 301 -
arch/x86_64/kernel/tsc.c | 108 --
drivers/char/hangcheck-timer.c |2
include/asm-x86_64/proto.h |2
include/asm-x86_64/timex.h |5
10 files changed, 137 insertions(+), 411 deletions(-)
linux-2.6.20-rc1_timeofday-arch-x86-64-generic-time-conversion_C7.patch
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index d427553..e1d044c 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -24,6 +24,10 @@ config X86
bool
default y
+config GENERIC_TIME
+ bool
+ default y
+
config ZONE_DMA32
bool
default y
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 7ce7797..723417d 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -786,7 +786,7 @@ static void setup_APIC_timer(unsigned in
/* Turn off PIT interrupt if we use APIC timer as main timer.
Only works with the PM timer right now
TBD fix it for HPET too. */
- if (vxtime.mode == VXTIME_PMTMR &&
+ if ((pmtmr_ioport != 0) &&
smp_processor_id() == boot_cpu_id &&
apic_runs_main_timer == 1 &&
!cpu_isset(boot_cpu_id, timer_interrupt_broadcast_ipi_mask)) {
diff --git a/arch/x86_64/kernel/hpet.c b/arch/x86_64/kernel/hpet.c
index ad67c6b..74d95d0 100644
--- a/arch/x86_64/kernel/hpet.c
+++ b/arch/x86_64/kernel/hpet.c
@@ -21,12 +21,6 @@ unsigned long hpet_tick; /* HPET clocks
int hpet_use_timer;/* Use counter of hpet for time keeping,
* otherwise PIT
*/
-unsigned int do_gettimeoffset_hpet(void)
-{
- /* cap counter read to one tick to avoid inconsistencies */
- unsigned long counter = hpet_readl(HPET_COUNTER) - vxtime.last;
- return (min(counter,hpet_tick) * vxtime.quot) >> US_SCALE;
-}
#ifdef CONFIG_HPET
static __init int late_hpet_init(void)
@@ -435,3 +429,62 @@ static int __init nohpet_setup(char *s)
__setup("nohpet", nohpet_setup);
+#define HPET_MASK 0x
+#define HPET_SHIFT 22
+
+/* FSEC = 10^-15 NSEC = 10^-9 */
+#define FSEC_PER_NSEC 100
+
+static void *hpet_ptr;
+
+static cycle_t read_hpet(void)
+{
+ return (cycle_t)readl(hpet_ptr);
+}
+
+struct clocksource clocksource_hpet = {
+ .name = "hpet",
+ .rating = 250,
+ .read = read_hpet,
+ .mask = (cycle_t)HPET_MASK,
+ .mult = 0, /* set below */
+ .shift = HPET_SHIFT,
+ .is_continuous = 1,
+};
+
+static int __init init_hpet_clocksource(void)
+{
+ unsigned long hpet_period;
+ void __iomem *hpet_base;
+ u64 tmp;
+
+ if (!hpet_address)
+ return -ENODEV;
+
+ /* calculate the hpet address: */
+ hpet_base =
+ (void __iomem*)ioremap_nocache(hpet_address, HPET_MMAP_SIZE);
+ hpet_ptr = hpet_base + HPET_COUNTER;
+
+ /* calculate the frequency: */
+ hpet_period = readl(hpet_base + HPET_PERIOD);
+
+ /*
+* hpet period is in femto seconds per cycle
+* so we need to convert this to ns/cyc units
+* aproximated by mult/2^shift
+*
+* fsec/cyc * 1nsec/100fsec = nsec/cyc = mult/2^shift
+* fsec/cyc * 1ns/100fsec * 2^shift = mult
+* fsec/cyc * 2^shift * 1nsec/100fsec = mult
+* (fsec/cyc << shift)/100 = mult
+* (hpet_period << shift)/FSEC_PER_NSEC = mult
+*/
+ tmp = (u64)hpet_period << HPET_SHIFT;
+ do_div(tmp, FSEC_PER_NSEC);
+ clocksource_hpet.mult = (u32)tmp;
+
+ return clocksource_register(&clocksource_hpet);
+}
+
+module_init(init_hpet_clocksource);
diff --git a/arch/x86_64/kernel/pmtimer.c b/arch/x86_64/kernel/pmtimer.c
index 7554458..ae8f912 100644
--- a/arch/x86_64/kernel/pmtimer.c
+++ b/arch/x86_64/kernel/pmtimer.c
@@ -24,15 +24,6 @@ #include
#include
#include
-/* The I/O port the PMTMR resides at.
- * The location is detected during setup_arch(),
- * in arch/i386/kernel/acpi/boot.c */
-u32 pmtmr_ioport __read_mostly;
-
-/* value of the Power timer at last timer interrupt */
-static u32 offset_delay;
-static u32 last_pmtmr_tick;
-
#define ACPI_PM_MASK 0xFF /* limit it to 24 bits */
static inline u32 cyc2us(u32 cycles)
@@ -48,38 +39,6 @@ static inline u32 cyc2us(u32 cycles)
return (cycles >> 10);
}
-int pmtimer
[PATCH 4/5][time][x86_64] Convert x86_64 to use GENERIC_TIME
This patch converts x86_64 to use the GENERIC_TIME infrastructure and
adds clocksource structures for both TSC and HPET (ACPI PM is shared w/
i386).
Signed-off-by: John Stultz <[EMAIL PROTECTED]>
arch/x86_64/Kconfig |4
arch/x86_64/kernel/apic.c|2
arch/x86_64/kernel/hpet.c| 65 -
arch/x86_64/kernel/pmtimer.c | 58
arch/x86_64/kernel/smpboot.c |1
arch/x86_64/kernel/time.c| 301 ---
arch/x86_64/kernel/tsc.c | 105 +--
include/asm-x86_64/proto.h |1
include/asm-x86_64/timex.h |5
9 files changed, 133 insertions(+), 409 deletions(-)
linux-2.6.19-rc6git11_timeofday-arch-x86-64-generic-time-conversion_C7.patch
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 010d226..20bcd6d 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -24,6 +24,10 @@ config X86
bool
default y
+config GENERIC_TIME
+ bool
+ default y
+
config ZONE_DMA32
bool
default y
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 02f5961..588ef3d 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -696,7 +696,7 @@ static void setup_APIC_timer(unsigned in
/* Turn off PIT interrupt if we use APIC timer as main timer.
Only works with the PM timer right now
TBD fix it for HPET too. */
- if (vxtime.mode == VXTIME_PMTMR &&
+ if ((pmtmr_ioport != 0) &&
smp_processor_id() == boot_cpu_id &&
apic_runs_main_timer == 1 &&
!cpu_isset(boot_cpu_id, timer_interrupt_broadcast_ipi_mask)) {
diff --git a/arch/x86_64/kernel/hpet.c b/arch/x86_64/kernel/hpet.c
index a219786..c00b01a 100644
--- a/arch/x86_64/kernel/hpet.c
+++ b/arch/x86_64/kernel/hpet.c
@@ -19,12 +19,6 @@ unsigned long hpet_tick; /* HPET clocks
int hpet_use_timer;/* Use counter of hpet for time keeping,
* otherwise PIT
*/
-unsigned int do_gettimeoffset_hpet(void)
-{
- /* cap counter read to one tick to avoid inconsistencies */
- unsigned long counter = hpet_readl(HPET_COUNTER) - vxtime.last;
- return (min(counter,hpet_tick) * vxtime.quot) >> US_SCALE;
-}
#ifdef CONFIG_HPET
static __init int late_hpet_init(void)
@@ -433,3 +427,62 @@ static int __init nohpet_setup(char *s)
__setup("nohpet", nohpet_setup);
+#define HPET_MASK 0x
+#define HPET_SHIFT 22
+
+/* FSEC = 10^-15 NSEC = 10^-9 */
+#define FSEC_PER_NSEC 100
+
+static void *hpet_ptr;
+
+static cycle_t read_hpet(void)
+{
+ return (cycle_t)readl(hpet_ptr);
+}
+
+struct clocksource clocksource_hpet = {
+ .name = "hpet",
+ .rating = 250,
+ .read = read_hpet,
+ .mask = (cycle_t)HPET_MASK,
+ .mult = 0, /* set below */
+ .shift = HPET_SHIFT,
+ .is_continuous = 1,
+};
+
+static int __init init_hpet_clocksource(void)
+{
+ unsigned long hpet_period;
+ void __iomem *hpet_base;
+ u64 tmp;
+
+ if (!hpet_address)
+ return -ENODEV;
+
+ /* calculate the hpet address: */
+ hpet_base =
+ (void __iomem*)ioremap_nocache(hpet_address, HPET_MMAP_SIZE);
+ hpet_ptr = hpet_base + HPET_COUNTER;
+
+ /* calculate the frequency: */
+ hpet_period = readl(hpet_base + HPET_PERIOD);
+
+ /*
+* hpet period is in femto seconds per cycle
+* so we need to convert this to ns/cyc units
+* aproximated by mult/2^shift
+*
+* fsec/cyc * 1nsec/100fsec = nsec/cyc = mult/2^shift
+* fsec/cyc * 1ns/100fsec * 2^shift = mult
+* fsec/cyc * 2^shift * 1nsec/100fsec = mult
+* (fsec/cyc << shift)/100 = mult
+* (hpet_period << shift)/FSEC_PER_NSEC = mult
+*/
+ tmp = (u64)hpet_period << HPET_SHIFT;
+ do_div(tmp, FSEC_PER_NSEC);
+ clocksource_hpet.mult = (u32)tmp;
+
+ return clocksource_register(&clocksource_hpet);
+}
+
+module_init(init_hpet_clocksource);
diff --git a/arch/x86_64/kernel/pmtimer.c b/arch/x86_64/kernel/pmtimer.c
index 7554458..ae8f912 100644
--- a/arch/x86_64/kernel/pmtimer.c
+++ b/arch/x86_64/kernel/pmtimer.c
@@ -24,15 +24,6 @@ #include
#include
#include
-/* The I/O port the PMTMR resides at.
- * The location is detected during setup_arch(),
- * in arch/i386/kernel/acpi/boot.c */
-u32 pmtmr_ioport __read_mostly;
-
-/* value of the Power timer at last timer interrupt */
-static u32 offset_delay;
-static u32 last_pmtmr_tick;
-
#define ACPI_PM_MASK 0xFF /* limit it to 24 bits */
static inline u32 cyc2us(u32 cycles)
@@ -48,38 +39,6 @@ static inline u32 cyc2us(u32 cycles)
return (cycles >> 10);
}
-int pmtimer_mark_offset(void)
-{
- static int first_ru
