[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 <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@muc.de> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -616,6 +616,7 @@ static int __init acpi_parse_sbf(struct acpi_table_header *table)
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}
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#ifdef CONFIG_HPET_TIMER
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#include <asm/hpet.h>
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static int __init acpi_parse_hpet(struct acpi_table_header *table)
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{
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@ -646,24 +647,11 @@ static int __init acpi_parse_hpet(struct acpi_table_header *table)
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hpet_res->end = (1 * 1024) - 1;
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}
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#ifdef CONFIG_X86_64
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vxtime.hpet_address = hpet_tbl->address.address;
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hpet_address = hpet_tbl->address.address;
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printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
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hpet_tbl->id, vxtime.hpet_address);
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hpet_tbl->id, hpet_address);
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res_start = vxtime.hpet_address;
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#else /* X86 */
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{
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extern unsigned long hpet_address;
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hpet_address = hpet_tbl->address.address;
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printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
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hpet_tbl->id, hpet_address);
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res_start = hpet_address;
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}
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#endif /* X86 */
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res_start = hpet_address;
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if (hpet_res) {
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hpet_res->start = res_start;
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@ -37,6 +37,7 @@
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#include <asm/idle.h>
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#include <asm/proto.h>
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#include <asm/timex.h>
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#include <asm/hpet.h>
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#include <asm/apic.h>
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int apic_mapped;
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@ -763,7 +764,7 @@ static void setup_APIC_timer(unsigned int clocks)
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local_irq_save(flags);
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/* wait for irq slice */
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if (vxtime.hpet_address && hpet_use_timer) {
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if (hpet_address && hpet_use_timer) {
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int trigger = hpet_readl(HPET_T0_CMP);
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while (hpet_readl(HPET_COUNTER) >= trigger)
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/* do nothing */ ;
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@ -67,6 +67,7 @@ static int notsc __initdata = 0;
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unsigned int cpu_khz; /* TSC clocks / usec, not used here */
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EXPORT_SYMBOL(cpu_khz);
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unsigned long hpet_address;
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static unsigned long hpet_period; /* fsecs / HPET clock */
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unsigned long hpet_tick; /* HPET clocks / interrupt */
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int hpet_use_timer; /* Use counter of hpet for time keeping, otherwise PIT */
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@ -316,7 +317,7 @@ static noinline void handle_lost_ticks(int lost)
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KERN_WARNING "Your time source seems to be instable or "
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"some driver is hogging interupts\n");
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print_symbol("rip %s\n", get_irq_regs()->rip);
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if (vxtime.mode == VXTIME_TSC && vxtime.hpet_address) {
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if (vxtime.mode == VXTIME_TSC && hpet_address) {
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printk(KERN_WARNING "Falling back to HPET\n");
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if (hpet_use_timer)
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vxtime.last = hpet_readl(HPET_T0_CMP) -
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@ -324,6 +325,7 @@ static noinline void handle_lost_ticks(int lost)
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else
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vxtime.last = hpet_readl(HPET_COUNTER);
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vxtime.mode = VXTIME_HPET;
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vxtime.hpet_address = hpet_address;
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do_gettimeoffset = do_gettimeoffset_hpet;
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}
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/* else should fall back to PIT, but code missing. */
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@ -354,7 +356,7 @@ void main_timer_handler(void)
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write_seqlock(&xtime_lock);
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if (vxtime.hpet_address)
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if (hpet_address)
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offset = hpet_readl(HPET_COUNTER);
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if (hpet_use_timer) {
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@ -739,7 +741,7 @@ static __init int late_hpet_init(void)
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struct hpet_data hd;
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unsigned int ntimer;
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if (!vxtime.hpet_address)
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if (!hpet_address)
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return 0;
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memset(&hd, 0, sizeof (hd));
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@ -752,7 +754,7 @@ static __init int late_hpet_init(void)
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* Register with driver.
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* Timer0 and Timer1 is used by platform.
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*/
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hd.hd_phys_address = vxtime.hpet_address;
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hd.hd_phys_address = hpet_address;
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hd.hd_address = (void __iomem *)fix_to_virt(FIX_HPET_BASE);
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hd.hd_nirqs = ntimer;
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hd.hd_flags = HPET_DATA_PLATFORM;
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@ -821,10 +823,10 @@ static int hpet_init(void)
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{
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unsigned int id;
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if (!vxtime.hpet_address)
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if (!hpet_address)
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return -1;
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set_fixmap_nocache(FIX_HPET_BASE, vxtime.hpet_address);
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__set_fixmap(VSYSCALL_HPET, vxtime.hpet_address, PAGE_KERNEL_VSYSCALL_NOCACHE);
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set_fixmap_nocache(FIX_HPET_BASE, hpet_address);
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__set_fixmap(VSYSCALL_HPET, hpet_address, PAGE_KERNEL_VSYSCALL_NOCACHE);
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/*
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* Read the period, compute tick and quotient.
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@ -878,7 +880,7 @@ void __init pit_stop_interrupt(void)
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void __init stop_timer_interrupt(void)
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{
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char *name;
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if (vxtime.hpet_address) {
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if (hpet_address) {
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name = "HPET";
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hpet_timer_stop_set_go(0);
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} else {
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@ -901,8 +903,7 @@ static struct irqaction irq0 = {
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void __init time_init(void)
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{
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if (nohpet)
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vxtime.hpet_address = 0;
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hpet_address = 0;
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xtime.tv_sec = get_cmos_time();
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xtime.tv_nsec = 0;
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@ -912,7 +913,7 @@ void __init time_init(void)
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if (!hpet_init())
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vxtime_hz = (FSEC_PER_SEC + hpet_period / 2) / hpet_period;
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else
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vxtime.hpet_address = 0;
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hpet_address = 0;
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if (hpet_use_timer) {
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/* set tick_nsec to use the proper rate for HPET */
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@ -920,7 +921,7 @@ void __init time_init(void)
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cpu_khz = hpet_calibrate_tsc();
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timename = "HPET";
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#ifdef CONFIG_X86_PM_TIMER
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} else if (pmtmr_ioport && !vxtime.hpet_address) {
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} else if (pmtmr_ioport && !hpet_address) {
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vxtime_hz = PM_TIMER_FREQUENCY;
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timename = "PM";
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pit_init();
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@ -990,23 +991,24 @@ void time_init_gtod(void)
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if (unsynchronized_tsc())
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notsc = 1;
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if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
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if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
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vgetcpu_mode = VGETCPU_RDTSCP;
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else
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vgetcpu_mode = VGETCPU_LSL;
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if (vxtime.hpet_address && notsc) {
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if (hpet_address && notsc) {
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timetype = hpet_use_timer ? "HPET" : "PIT/HPET";
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if (hpet_use_timer)
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vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
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else
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vxtime.last = hpet_readl(HPET_COUNTER);
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vxtime.mode = VXTIME_HPET;
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vxtime.hpet_address = hpet_address;
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do_gettimeoffset = do_gettimeoffset_hpet;
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#ifdef CONFIG_X86_PM_TIMER
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/* Using PM for gettimeofday is quite slow, but we have no other
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choice because the TSC is too unreliable on some systems. */
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} else if (pmtmr_ioport && !vxtime.hpet_address && notsc) {
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} else if (pmtmr_ioport && !hpet_address && notsc) {
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timetype = "PM";
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do_gettimeoffset = do_gettimeoffset_pm;
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vxtime.mode = VXTIME_PMTMR;
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@ -1066,7 +1068,7 @@ static int timer_resume(struct sys_device *dev)
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sleep_length = 0;
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ctime = sleep_start;
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}
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if (vxtime.hpet_address)
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if (hpet_address)
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hpet_reenable();
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else
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i8254_timer_resume();
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@ -1150,7 +1152,7 @@ static unsigned int hpet_t1_cmp; /* cached comparator register */
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int is_hpet_enabled(void)
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{
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return vxtime.hpet_address != 0;
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return hpet_address != 0;
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}
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/*
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@ -58,6 +58,7 @@ extern int hpet_rtc_timer_init(void);
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extern int apic_is_clustered_box(void);
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extern int hpet_use_timer;
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extern unsigned long hpet_address;
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#ifdef CONFIG_HPET_EMULATE_RTC
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extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
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