Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2d0c87c3bc49c60ab5bbac401fb1ef37ff10bbe2
Commit: 2d0c87c3bc49c60ab5bbac401fb1ef37ff10bbe2
Parent: acc9a9dcdd0dd1d295c2f2ee02c27c761bd63cb1
Author: john stultz <[EMAIL PROTECTED]>
AuthorDate: Fri Feb 16 01:28:18 2007 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Feb 16 08:14:00 2007 -0800
[PATCH] time: x86_64: hpet_address cleanup
In preparation for supporting generic timekeeping, this patch cleans up
x86-64's use of vxtime.hpet_address, changing it to just hpet_address as is
also used in i386. This is necessary since the vxtime structure will be
going
away.
Signed-off-by: John Stultz <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Cc: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: Roman Zippel <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/i386/kernel/acpi/boot.c | 20 ++++----------------
arch/x86_64/kernel/apic.c | 3 ++-
arch/x86_64/kernel/time.c | 36 +++++++++++++++++++-----------------
include/asm-x86_64/hpet.h | 1 +
4 files changed, 26 insertions(+), 34 deletions(-)
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 56818cf..fb3e723 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -616,6 +616,7 @@ static int __init acpi_parse_sbf(struct acpi_table_header
*table)
}
#ifdef CONFIG_HPET_TIMER
+#include <asm/hpet.h>
static int __init acpi_parse_hpet(struct acpi_table_header *table)
{
@@ -646,24 +647,11 @@ static int __init acpi_parse_hpet(struct
acpi_table_header *table)
hpet_res->end = (1 * 1024) - 1;
}
-#ifdef CONFIG_X86_64
- vxtime.hpet_address = hpet_tbl->address.address;
-
+ hpet_address = hpet_tbl->address.address;
printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
- hpet_tbl->id, vxtime.hpet_address);
-
- res_start = vxtime.hpet_address;
-#else /* X86 */
- {
- extern unsigned long hpet_address;
+ hpet_tbl->id, hpet_address);
- hpet_address = hpet_tbl->address.address;
- printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
- hpet_tbl->id, hpet_address);
-
- res_start = hpet_address;
- }
-#endif /* X86 */
+ res_start = hpet_address;
if (hpet_res) {
hpet_res->start = res_start;
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 124b2d2..7ce7797 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -37,6 +37,7 @@
#include <asm/idle.h>
#include <asm/proto.h>
#include <asm/timex.h>
+#include <asm/hpet.h>
#include <asm/apic.h>
int apic_mapped;
@@ -763,7 +764,7 @@ static void setup_APIC_timer(unsigned int clocks)
local_irq_save(flags);
/* wait for irq slice */
- if (vxtime.hpet_address && hpet_use_timer) {
+ if (hpet_address && hpet_use_timer) {
int trigger = hpet_readl(HPET_T0_CMP);
while (hpet_readl(HPET_COUNTER) >= trigger)
/* do nothing */ ;
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index 8cb2b2d..76857ad 100644
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -67,6 +67,7 @@ static int notsc __initdata = 0;
unsigned int cpu_khz; /* TSC clocks / usec,
not used here */
EXPORT_SYMBOL(cpu_khz);
+unsigned long hpet_address;
static unsigned long hpet_period; /* fsecs / HPET clock */
unsigned long hpet_tick; /* HPET clocks /
interrupt */
int hpet_use_timer; /* Use counter of hpet for time
keeping, otherwise PIT */
@@ -316,7 +317,7 @@ static noinline void handle_lost_ticks(int lost)
KERN_WARNING "Your time source seems to be instable or "
"some driver is hogging interupts\n");
print_symbol("rip %s\n", get_irq_regs()->rip);
- if (vxtime.mode == VXTIME_TSC && vxtime.hpet_address) {
+ if (vxtime.mode == VXTIME_TSC && hpet_address) {
printk(KERN_WARNING "Falling back to HPET\n");
if (hpet_use_timer)
vxtime.last = hpet_readl(HPET_T0_CMP) -
@@ -324,6 +325,7 @@ static noinline void handle_lost_ticks(int lost)
else
vxtime.last = hpet_readl(HPET_COUNTER);
vxtime.mode = VXTIME_HPET;
+ vxtime.hpet_address = hpet_address;
do_gettimeoffset = do_gettimeoffset_hpet;
}
/* else should fall back to PIT, but code missing. */
@@ -354,7 +356,7 @@ void main_timer_handler(void)
write_seqlock(&xtime_lock);
- if (vxtime.hpet_address)
+ if (hpet_address)
offset = hpet_readl(HPET_COUNTER);
if (hpet_use_timer) {
@@ -739,7 +741,7 @@ static __init int late_hpet_init(void)
struct hpet_data hd;
unsigned int ntimer;
- if (!vxtime.hpet_address)
+ if (!hpet_address)
return 0;
memset(&hd, 0, sizeof (hd));
@@ -752,7 +754,7 @@ static __init int late_hpet_init(void)
* Register with driver.
* Timer0 and Timer1 is used by platform.
*/
- hd.hd_phys_address = vxtime.hpet_address;
+ hd.hd_phys_address = hpet_address;
hd.hd_address = (void __iomem *)fix_to_virt(FIX_HPET_BASE);
hd.hd_nirqs = ntimer;
hd.hd_flags = HPET_DATA_PLATFORM;
@@ -821,10 +823,10 @@ static int hpet_init(void)
{
unsigned int id;
- if (!vxtime.hpet_address)
+ if (!hpet_address)
return -1;
- set_fixmap_nocache(FIX_HPET_BASE, vxtime.hpet_address);
- __set_fixmap(VSYSCALL_HPET, vxtime.hpet_address,
PAGE_KERNEL_VSYSCALL_NOCACHE);
+ set_fixmap_nocache(FIX_HPET_BASE, hpet_address);
+ __set_fixmap(VSYSCALL_HPET, hpet_address, PAGE_KERNEL_VSYSCALL_NOCACHE);
/*
* Read the period, compute tick and quotient.
@@ -878,7 +880,7 @@ void __init pit_stop_interrupt(void)
void __init stop_timer_interrupt(void)
{
char *name;
- if (vxtime.hpet_address) {
+ if (hpet_address) {
name = "HPET";
hpet_timer_stop_set_go(0);
} else {
@@ -901,8 +903,7 @@ static struct irqaction irq0 = {
void __init time_init(void)
{
if (nohpet)
- vxtime.hpet_address = 0;
-
+ hpet_address = 0;
xtime.tv_sec = get_cmos_time();
xtime.tv_nsec = 0;
@@ -912,7 +913,7 @@ void __init time_init(void)
if (!hpet_init())
vxtime_hz = (FSEC_PER_SEC + hpet_period / 2) / hpet_period;
else
- vxtime.hpet_address = 0;
+ hpet_address = 0;
if (hpet_use_timer) {
/* set tick_nsec to use the proper rate for HPET */
@@ -920,7 +921,7 @@ void __init time_init(void)
cpu_khz = hpet_calibrate_tsc();
timename = "HPET";
#ifdef CONFIG_X86_PM_TIMER
- } else if (pmtmr_ioport && !vxtime.hpet_address) {
+ } else if (pmtmr_ioport && !hpet_address) {
vxtime_hz = PM_TIMER_FREQUENCY;
timename = "PM";
pit_init();
@@ -990,23 +991,24 @@ void time_init_gtod(void)
if (unsynchronized_tsc())
notsc = 1;
- if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
+ if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
vgetcpu_mode = VGETCPU_RDTSCP;
else
vgetcpu_mode = VGETCPU_LSL;
- if (vxtime.hpet_address && notsc) {
+ if (hpet_address && notsc) {
timetype = hpet_use_timer ? "HPET" : "PIT/HPET";
if (hpet_use_timer)
vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
else
vxtime.last = hpet_readl(HPET_COUNTER);
vxtime.mode = VXTIME_HPET;
+ vxtime.hpet_address = hpet_address;
do_gettimeoffset = do_gettimeoffset_hpet;
#ifdef CONFIG_X86_PM_TIMER
/* Using PM for gettimeofday is quite slow, but we have no other
choice because the TSC is too unreliable on some systems. */
- } else if (pmtmr_ioport && !vxtime.hpet_address && notsc) {
+ } else if (pmtmr_ioport && !hpet_address && notsc) {
timetype = "PM";
do_gettimeoffset = do_gettimeoffset_pm;
vxtime.mode = VXTIME_PMTMR;
@@ -1066,7 +1068,7 @@ static int timer_resume(struct sys_device *dev)
sleep_length = 0;
ctime = sleep_start;
}
- if (vxtime.hpet_address)
+ if (hpet_address)
hpet_reenable();
else
i8254_timer_resume();
@@ -1150,7 +1152,7 @@ static unsigned int hpet_t1_cmp; /* cached comparator
register */
int is_hpet_enabled(void)
{
- return vxtime.hpet_address != 0;
+ return hpet_address != 0;
}
/*
diff --git a/include/asm-x86_64/hpet.h b/include/asm-x86_64/hpet.h
index b390984..60d5127 100644
--- a/include/asm-x86_64/hpet.h
+++ b/include/asm-x86_64/hpet.h
@@ -58,6 +58,7 @@ extern int hpet_rtc_timer_init(void);
extern int apic_is_clustered_box(void);
extern int hpet_use_timer;
+extern unsigned long hpet_address;
#ifdef CONFIG_HPET_EMULATE_RTC
extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
-
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