summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/Makefile1
-rw-r--r--arch/x86/kernel/acpi/boot.c4
-rw-r--r--arch/x86/kernel/apb_timer.c784
-rw-r--r--arch/x86/kernel/apic/apic.c8
-rw-r--r--arch/x86/kernel/apic/io_apic.c86
-rw-r--r--arch/x86/kernel/apic/nmi.c2
-rw-r--r--arch/x86/kernel/apic/numaq_32.c1
-rw-r--r--arch/x86/kernel/i8259.c64
-rw-r--r--arch/x86/kernel/irqinit.c9
-rw-r--r--arch/x86/kernel/mrst.c216
-rw-r--r--arch/x86/kernel/olpc.c10
-rw-r--r--arch/x86/kernel/smpboot.c9
-rw-r--r--arch/x86/kernel/visws_quirks.c21
-rw-r--r--arch/x86/kernel/x86_init.c8
14 files changed, 1157 insertions, 66 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index d87f09bc5a5..4c58352209e 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -87,6 +87,7 @@ obj-$(CONFIG_VM86) += vm86_32.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_HPET_TIMER) += hpet.o
+obj-$(CONFIG_APB_TIMER) += apb_timer.o
obj-$(CONFIG_K8_NB) += k8.o
obj-$(CONFIG_DEBUG_RODATA_TEST) += test_rodata.o
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 738fcb60e70..a54d714545f 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -35,6 +35,7 @@
#include <linux/ioport.h>
#include <linux/pci.h>
+#include <asm/pci_x86.h>
#include <asm/pgtable.h>
#include <asm/io_apic.h>
#include <asm/apic.h>
@@ -1624,6 +1625,9 @@ int __init acpi_boot_init(void)
acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
+ if (!acpi_noirq)
+ x86_init.pci.init = pci_acpi_init;
+
return 0;
}
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
new file mode 100644
index 00000000000..4b7099526d2
--- /dev/null
+++ b/arch/x86/kernel/apb_timer.c
@@ -0,0 +1,784 @@
+/*
+ * apb_timer.c: Driver for Langwell APB timers
+ *
+ * (C) Copyright 2009 Intel Corporation
+ * Author: Jacob Pan (jacob.jun.pan@intel.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ *
+ * Note:
+ * Langwell is the south complex of Intel Moorestown MID platform. There are
+ * eight external timers in total that can be used by the operating system.
+ * The timer information, such as frequency and addresses, is provided to the
+ * OS via SFI tables.
+ * Timer interrupts are routed via FW/HW emulated IOAPIC independently via
+ * individual redirection table entries (RTE).
+ * Unlike HPET, there is no master counter, therefore one of the timers are
+ * used as clocksource. The overall allocation looks like:
+ * - timer 0 - NR_CPUs for per cpu timer
+ * - one timer for clocksource
+ * - one timer for watchdog driver.
+ * It is also worth notice that APB timer does not support true one-shot mode,
+ * free-running mode will be used here to emulate one-shot mode.
+ * APB timer can also be used as broadcast timer along with per cpu local APIC
+ * timer, but by default APB timer has higher rating than local APIC timers.
+ */
+
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/sysdev.h>
+#include <linux/pm.h>
+#include <linux/pci.h>
+#include <linux/sfi.h>
+#include <linux/interrupt.h>
+#include <linux/cpu.h>
+#include <linux/irq.h>
+
+#include <asm/fixmap.h>
+#include <asm/apb_timer.h>
+
+#define APBT_MASK CLOCKSOURCE_MASK(32)
+#define APBT_SHIFT 22
+#define APBT_CLOCKEVENT_RATING 150
+#define APBT_CLOCKSOURCE_RATING 250
+#define APBT_MIN_DELTA_USEC 200
+
+#define EVT_TO_APBT_DEV(evt) container_of(evt, struct apbt_dev, evt)
+#define APBT_CLOCKEVENT0_NUM (0)
+#define APBT_CLOCKEVENT1_NUM (1)
+#define APBT_CLOCKSOURCE_NUM (2)
+
+static unsigned long apbt_address;
+static int apb_timer_block_enabled;
+static void __iomem *apbt_virt_address;
+static int phy_cs_timer_id;
+
+/*
+ * Common DW APB timer info
+ */
+static uint64_t apbt_freq;
+
+static void apbt_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt);
+static int apbt_next_event(unsigned long delta,
+ struct clock_event_device *evt);
+static cycle_t apbt_read_clocksource(struct clocksource *cs);
+static void apbt_restart_clocksource(struct clocksource *cs);
+
+struct apbt_dev {
+ struct clock_event_device evt;
+ unsigned int num;
+ int cpu;
+ unsigned int irq;
+ unsigned int tick;
+ unsigned int count;
+ unsigned int flags;
+ char name[10];
+};
+
+int disable_apbt_percpu __cpuinitdata;
+
+static DEFINE_PER_CPU(struct apbt_dev, cpu_apbt_dev);
+
+#ifdef CONFIG_SMP
+static unsigned int apbt_num_timers_used;
+static struct apbt_dev *apbt_devs;
+#endif
+
+static inline unsigned long apbt_readl_reg(unsigned long a)
+{
+ return readl(apbt_virt_address + a);
+}
+
+static inline void apbt_writel_reg(unsigned long d, unsigned long a)
+{
+ writel(d, apbt_virt_address + a);
+}
+
+static inline unsigned long apbt_readl(int n, unsigned long a)
+{
+ return readl(apbt_virt_address + a + n * APBTMRS_REG_SIZE);
+}
+
+static inline void apbt_writel(int n, unsigned long d, unsigned long a)
+{
+ writel(d, apbt_virt_address + a + n * APBTMRS_REG_SIZE);
+}
+
+static inline void apbt_set_mapping(void)
+{
+ struct sfi_timer_table_entry *mtmr;
+
+ if (apbt_virt_address) {
+ pr_debug("APBT base already mapped\n");
+ return;
+ }
+ mtmr = sfi_get_mtmr(APBT_CLOCKEVENT0_NUM);
+ if (mtmr == NULL) {
+ printk(KERN_ERR "Failed to get MTMR %d from SFI\n",
+ APBT_CLOCKEVENT0_NUM);
+ return;
+ }
+ apbt_address = (unsigned long)mtmr->phys_addr;
+ if (!apbt_address) {
+ printk(KERN_WARNING "No timer base from SFI, use default\n");
+ apbt_address = APBT_DEFAULT_BASE;
+ }
+ apbt_virt_address = ioremap_nocache(apbt_address, APBT_MMAP_SIZE);
+ if (apbt_virt_address) {
+ pr_debug("Mapped APBT physical addr %p at virtual addr %p\n",\
+ (void *)apbt_address, (void *)apbt_virt_address);
+ } else {
+ pr_debug("Failed mapping APBT phy address at %p\n",\
+ (void *)apbt_address);
+ goto panic_noapbt;
+ }
+ apbt_freq = mtmr->freq_hz / USEC_PER_SEC;
+ sfi_free_mtmr(mtmr);
+
+ /* Now figure out the physical timer id for clocksource device */
+ mtmr = sfi_get_mtmr(APBT_CLOCKSOURCE_NUM);
+ if (mtmr == NULL)
+ goto panic_noapbt;
+
+ /* Now figure out the physical timer id */
+ phy_cs_timer_id = (unsigned int)(mtmr->phys_addr & 0xff)
+ / APBTMRS_REG_SIZE;
+ pr_debug("Use timer %d for clocksource\n", phy_cs_timer_id);
+ return;
+
+panic_noapbt:
+ panic("Failed to setup APB system timer\n");
+
+}
+
+static inline void apbt_clear_mapping(void)
+{
+ iounmap(apbt_virt_address);
+ apbt_virt_address = NULL;
+}
+
+/*
+ * APBT timer interrupt enable / disable
+ */
+static inline int is_apbt_capable(void)
+{
+ return apbt_virt_address ? 1 : 0;
+}
+
+static struct clocksource clocksource_apbt = {
+ .name = "apbt",
+ .rating = APBT_CLOCKSOURCE_RATING,
+ .read = apbt_read_clocksource,
+ .mask = APBT_MASK,
+ .shift = APBT_SHIFT,
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+ .resume = apbt_restart_clocksource,
+};
+
+/* boot APB clock event device */
+static struct clock_event_device apbt_clockevent = {
+ .name = "apbt0",
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .set_mode = apbt_set_mode,
+ .set_next_event = apbt_next_event,
+ .shift = APBT_SHIFT,
+ .irq = 0,
+ .rating = APBT_CLOCKEVENT_RATING,
+};
+
+/*
+ * if user does not want to use per CPU apb timer, just give it a lower rating
+ * than local apic timer and skip the late per cpu timer init.
+ */
+static inline int __init setup_x86_mrst_timer(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+
+ if (strcmp("apbt_only", arg) == 0)
+ disable_apbt_percpu = 0;
+ else if (strcmp("lapic_and_apbt", arg) == 0)
+ disable_apbt_percpu = 1;
+ else {
+ pr_warning("X86 MRST timer option %s not recognised"
+ " use x86_mrst_timer=apbt_only or lapic_and_apbt\n",
+ arg);
+ return -EINVAL;
+ }
+ return 0;
+}
+__setup("x86_mrst_timer=", setup_x86_mrst_timer);
+
+/*
+ * start count down from 0xffff_ffff. this is done by toggling the enable bit
+ * then load initial load count to ~0.
+ */
+static void apbt_start_counter(int n)
+{
+ unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
+
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(n, ctrl, APBTMR_N_CONTROL);
+ apbt_writel(n, ~0, APBTMR_N_LOAD_COUNT);
+ /* enable, mask interrupt */
+ ctrl &= ~APBTMR_CONTROL_MODE_PERIODIC;
+ ctrl |= (APBTMR_CONTROL_ENABLE | APBTMR_CONTROL_INT);
+ apbt_writel(n, ctrl, APBTMR_N_CONTROL);
+ /* read it once to get cached counter value initialized */
+ apbt_read_clocksource(&clocksource_apbt);
+}
+
+static irqreturn_t apbt_interrupt_handler(int irq, void *data)
+{
+ struct apbt_dev *dev = (struct apbt_dev *)data;
+ struct clock_event_device *aevt = &dev->evt;
+
+ if (!aevt->event_handler) {
+ printk(KERN_INFO "Spurious APBT timer interrupt on %d\n",
+ dev->num);
+ return IRQ_NONE;
+ }
+ aevt->event_handler(aevt);
+ return IRQ_HANDLED;
+}
+
+static void apbt_restart_clocksource(struct clocksource *cs)
+{
+ apbt_start_counter(phy_cs_timer_id);
+}
+
+/* Setup IRQ routing via IOAPIC */
+#ifdef CONFIG_SMP
+static void apbt_setup_irq(struct apbt_dev *adev)
+{
+ struct irq_chip *chip;
+ struct irq_desc *desc;
+
+ /* timer0 irq has been setup early */
+ if (adev->irq == 0)
+ return;
+ desc = irq_to_desc(adev->irq);
+ chip = get_irq_chip(adev->irq);
+ disable_irq(adev->irq);
+ desc->status |= IRQ_MOVE_PCNTXT;
+ irq_set_affinity(adev->irq, cpumask_of(adev->cpu));
+ /* APB timer irqs are set up as mp_irqs, timer is edge triggerred */
+ set_irq_chip_and_handler_name(adev->irq, chip, handle_edge_irq, "edge");
+ enable_irq(adev->irq);
+ if (system_state == SYSTEM_BOOTING)
+ if (request_irq(adev->irq, apbt_interrupt_handler,
+ IRQF_TIMER | IRQF_DISABLED | IRQF_NOBALANCING,
+ adev->name, adev)) {
+ printk(KERN_ERR "Failed request IRQ for APBT%d\n",
+ adev->num);
+ }
+}
+#endif
+
+static void apbt_enable_int(int n)
+{
+ unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
+ /* clear pending intr */
+ apbt_readl(n, APBTMR_N_EOI);
+ ctrl &= ~APBTMR_CONTROL_INT;
+ apbt_writel(n, ctrl, APBTMR_N_CONTROL);
+}
+
+static void apbt_disable_int(int n)
+{
+ unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
+
+ ctrl |= APBTMR_CONTROL_INT;
+ apbt_writel(n, ctrl, APBTMR_N_CONTROL);
+}
+
+
+static int __init apbt_clockevent_register(void)
+{
+ struct sfi_timer_table_entry *mtmr;
+ struct apbt_dev *adev = &__get_cpu_var(cpu_apbt_dev);
+
+ mtmr = sfi_get_mtmr(APBT_CLOCKEVENT0_NUM);
+ if (mtmr == NULL) {
+ printk(KERN_ERR "Failed to get MTMR %d from SFI\n",
+ APBT_CLOCKEVENT0_NUM);
+ return -ENODEV;
+ }
+
+ /*
+ * We need to calculate the scaled math multiplication factor for
+ * nanosecond to apbt tick conversion.
+ * mult = (nsec/cycle)*2^APBT_SHIFT
+ */
+ apbt_clockevent.mult = div_sc((unsigned long) mtmr->freq_hz
+ , NSEC_PER_SEC, APBT_SHIFT);
+
+ /* Calculate the min / max delta */
+ apbt_clockevent.max_delta_ns = clockevent_delta2ns(0x7FFFFFFF,
+ &apbt_clockevent);
+ apbt_clockevent.min_delta_ns = clockevent_delta2ns(
+ APBT_MIN_DELTA_USEC*apbt_freq,
+ &apbt_clockevent);
+ /*
+ * Start apbt with the boot cpu mask and make it
+ * global if not used for per cpu timer.
+ */
+ apbt_clockevent.cpumask = cpumask_of(smp_processor_id());
+ adev->num = smp_processor_id();
+ memcpy(&adev->evt, &apbt_clockevent, sizeof(struct clock_event_device));
+
+ if (disable_apbt_percpu) {
+ apbt_clockevent.rating = APBT_CLOCKEVENT_RATING - 100;
+ global_clock_event = &adev->evt;
+ printk(KERN_DEBUG "%s clockevent registered as global\n",
+ global_clock_event->name);
+ }
+
+ if (request_irq(apbt_clockevent.irq, apbt_interrupt_handler,
+ IRQF_TIMER | IRQF_DISABLED | IRQF_NOBALANCING,
+ apbt_clockevent.name, adev)) {
+ printk(KERN_ERR "Failed request IRQ for APBT%d\n",
+ apbt_clockevent.irq);
+ }
+
+ clockevents_register_device(&adev->evt);
+ /* Start APBT 0 interrupts */
+ apbt_enable_int(APBT_CLOCKEVENT0_NUM);
+
+ sfi_free_mtmr(mtmr);
+ return 0;
+}
+
+#ifdef CONFIG_SMP
+/* Should be called with per cpu */
+void apbt_setup_secondary_clock(void)
+{
+ struct apbt_dev *adev;
+ struct clock_event_device *aevt;
+ int cpu;
+
+ /* Don't register boot CPU clockevent */
+ cpu = smp_processor_id();
+ if (cpu == boot_cpu_id)
+ return;
+ /*
+ * We need to calculate the scaled math multiplication factor for
+ * nanosecond to apbt tick conversion.
+ * mult = (nsec/cycle)*2^APBT_SHIFT
+ */
+ printk(KERN_INFO "Init per CPU clockevent %d\n", cpu);
+ adev = &per_cpu(cpu_apbt_dev, cpu);
+ aevt = &adev->evt;
+
+ memcpy(aevt, &apbt_clockevent, sizeof(*aevt));
+ aevt->cpumask = cpumask_of(cpu);
+ aevt->name = adev->name;
+ aevt->mode = CLOCK_EVT_MODE_UNUSED;
+
+ printk(KERN_INFO "Registering CPU %d clockevent device %s, mask %08x\n",
+ cpu, aevt->name, *(u32 *)aevt->cpumask);
+
+ apbt_setup_irq(adev);
+
+ clockevents_register_device(aevt);
+
+ apbt_enable_int(cpu);
+
+ return;
+}
+
+/*
+ * this notify handler process CPU hotplug events. in case of S0i3, nonboot
+ * cpus are disabled/enabled frequently, for performance reasons, we keep the
+ * per cpu timer irq registered so that we do need to do free_irq/request_irq.
+ *
+ * TODO: it might be more reliable to directly disable percpu clockevent device
+ * without the notifier chain. currently, cpu 0 may get interrupts from other
+ * cpu timers during the offline process due to the ordering of notification.
+ * the extra interrupt is harmless.
+ */
+static int apbt_cpuhp_notify(struct notifier_block *n,
+ unsigned long action, void *hcpu)
+{
+ unsigned long cpu = (unsigned long)hcpu;
+ struct apbt_dev *adev = &per_cpu(cpu_apbt_dev, cpu);
+
+ switch (action & 0xf) {
+ case CPU_DEAD:
+ apbt_disable_int(cpu);
+ if (system_state == SYSTEM_RUNNING)
+ pr_debug("skipping APBT CPU %lu offline\n", cpu);
+ else if (adev) {
+ pr_debug("APBT clockevent for cpu %lu offline\n", cpu);
+ free_irq(adev->irq, adev);
+ }
+ break;
+ default:
+ pr_debug(KERN_INFO "APBT notified %lu, no action\n", action);
+ }
+ return NOTIFY_OK;
+}
+
+static __init int apbt_late_init(void)
+{
+ if (disable_apbt_percpu)
+ return 0;
+ /* This notifier should be called after workqueue is ready */
+ hotcpu_notifier(apbt_cpuhp_notify, -20);
+ return 0;
+}
+fs_initcall(apbt_late_init);
+#else
+
+void apbt_setup_secondary_clock(void) {}
+
+#endif /* CONFIG_SMP */
+
+static void apbt_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ unsigned long ctrl;
+ uint64_t delta;
+ int timer_num;
+ struct apbt_dev *adev = EVT_TO_APBT_DEV(evt);
+
+ timer_num = adev->num;
+ pr_debug("%s CPU %d timer %d mode=%d\n",
+ __func__, first_cpu(*evt->cpumask), timer_num, mode);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ delta = ((uint64_t)(NSEC_PER_SEC/HZ)) * apbt_clockevent.mult;
+ delta >>= apbt_clockevent.shift;
+ ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
+ ctrl |= APBTMR_CONTROL_MODE_PERIODIC;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ /*
+ * DW APB p. 46, have to disable timer before load counter,
+ * may cause sync problem.
+ */
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ udelay(1);
+ pr_debug("Setting clock period %d for HZ %d\n", (int)delta, HZ);
+ apbt_writel(timer_num, delta, APBTMR_N_LOAD_COUNT);
+ ctrl |= APBTMR_CONTROL_ENABLE;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ break;
+ /* APB timer does not have one-shot mode, use free running mode */
+ case CLOCK_EVT_MODE_ONESHOT:
+ ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
+ /*
+ * set free running mode, this mode will let timer reload max
+ * timeout which will give time (3min on 25MHz clock) to rearm
+ * the next event, therefore emulate the one-shot mode.
+ */
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ ctrl &= ~APBTMR_CONTROL_MODE_PERIODIC;
+
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ /* write again to set free running mode */
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+
+ /*
+ * DW APB p. 46, load counter with all 1s before starting free
+ * running mode.
+ */
+ apbt_writel(timer_num, ~0, APBTMR_N_LOAD_COUNT);
+ ctrl &= ~APBTMR_CONTROL_INT;
+ ctrl |= APBTMR_CONTROL_ENABLE;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ break;
+
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ apbt_disable_int(timer_num);
+ ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ break;
+
+ case CLOCK_EVT_MODE_RESUME:
+ apbt_enable_int(timer_num);
+ break;
+ }
+}
+
+static int apbt_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ unsigned long ctrl;
+ int timer_num;
+
+ struct apbt_dev *adev = EVT_TO_APBT_DEV(evt);
+
+ timer_num = adev->num;
+ /* Disable timer */
+ ctrl = apbt_readl(timer_num, APBTMR_N_CONTROL);
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ /* write new count */
+ apbt_writel(timer_num, delta, APBTMR_N_LOAD_COUNT);
+ ctrl |= APBTMR_CONTROL_ENABLE;
+ apbt_writel(timer_num, ctrl, APBTMR_N_CONTROL);
+ return 0;
+}
+
+/*
+ * APB timer clock is not in sync with pclk on Langwell, which translates to
+ * unreliable read value caused by sampling error. the error does not add up
+ * overtime and only happens when sampling a 0 as a 1 by mistake. so the time
+ * would go backwards. the following code is trying to prevent time traveling
+ * backwards. little bit paranoid.
+ */
+static cycle_t apbt_read_clocksource(struct clocksource *cs)
+{
+ unsigned long t0, t1, t2;
+ static unsigned long last_read;
+
+bad_count:
+ t1 = apbt_readl(phy_cs_timer_id,
+ APBTMR_N_CURRENT_VALUE);
+ t2 = apbt_readl(phy_cs_timer_id,
+ APBTMR_N_CURRENT_VALUE);
+ if (unlikely(t1 < t2)) {
+ pr_debug("APBT: read current count error %lx:%lx:%lx\n",
+ t1, t2, t2 - t1);
+ goto bad_count;
+ }
+ /*
+ * check against cached last read, makes sure time does not go back.
+ * it could be a normal rollover but we will do tripple check anyway
+ */
+ if (unlikely(t2 > last_read)) {
+ /* check if we have a normal rollover */
+ unsigned long raw_intr_status =
+ apbt_readl_reg(APBTMRS_RAW_INT_STATUS);
+ /*
+ * cs timer interrupt is masked but raw intr bit is set if
+ * rollover occurs. then we read EOI reg to clear it.
+ */
+ if (raw_intr_status & (1 << phy_cs_timer_id)) {
+ apbt_readl(phy_cs_timer_id, APBTMR_N_EOI);
+ goto out;
+ }
+ pr_debug("APB CS going back %lx:%lx:%lx ",
+ t2, last_read, t2 - last_read);
+bad_count_x3:
+ pr_debug(KERN_INFO "tripple check enforced\n");
+ t0 = apbt_readl(phy_cs_timer_id,
+ APBTMR_N_CURRENT_VALUE);
+ udelay(1);
+ t1 = apbt_readl(phy_cs_timer_id,
+ APBTMR_N_CURRENT_VALUE);
+ udelay(1);
+ t2 = apbt_readl(phy_cs_timer_id,
+ APBTMR_N_CURRENT_VALUE);
+ if ((t2 > t1) || (t1 > t0)) {
+ printk(KERN_ERR "Error: APB CS tripple check failed\n");
+ goto bad_count_x3;
+ }
+ }
+out:
+ last_read = t2;
+ return (cycle_t)~t2;
+}
+
+static int apbt_clocksource_register(void)
+{
+ u64 start, now;
+ cycle_t t1;
+
+ /* Start the counter, use timer 2 as source, timer 0/1 for event */
+ apbt_start_counter(phy_cs_timer_id);
+
+ /* Verify whether apbt counter works */
+ t1 = apbt_read_clocksource(&clocksource_apbt);
+ rdtscll(start);
+
+ /*
+ * We don't know the TSC frequency yet, but waiting for
+ * 200000 TSC cycles is safe:
+ * 4 GHz == 50us
+ * 1 GHz == 200us
+ */
+ do {
+ rep_nop();
+ rdtscll(now);
+ } while ((now - start) < 200000UL);
+
+ /* APBT is the only always on clocksource, it has to work! */
+ if (t1 == apbt_read_clocksource(&clocksource_apbt))
+ panic("APBT counter not counting. APBT disabled\n");
+
+ /*
+ * initialize and register APBT clocksource
+ * convert that to ns/clock cycle
+ * mult = (ns/c) * 2^APBT_SHIFT
+ */
+ clocksource_apbt.mult = div_sc(MSEC_PER_SEC,
+ (unsigned long) apbt_freq, APBT_SHIFT);
+ clocksource_register(&clocksource_apbt);
+
+ return 0;
+}
+
+/*
+ * Early setup the APBT timer, only use timer 0 for booting then switch to
+ * per CPU timer if possible.
+ * returns 1 if per cpu apbt is setup
+ * returns 0 if no per cpu apbt is chosen
+ * panic if set up failed, this is the only platform timer on Moorestown.
+ */
+void __init apbt_time_init(void)
+{
+#ifdef CONFIG_SMP
+ int i;
+ struct sfi_timer_table_entry *p_mtmr;
+ unsigned int percpu_timer;
+ struct apbt_dev *adev;
+#endif
+
+ if (apb_timer_block_enabled)
+ return;
+ apbt_set_mapping();
+ if (apbt_virt_address) {
+ pr_debug("Found APBT version 0x%lx\n",\
+ apbt_readl_reg(APBTMRS_COMP_VERSION));
+ } else
+ goto out_noapbt;
+ /*
+ * Read the frequency and check for a sane value, for ESL model
+ * we extend the possible clock range to allow time scaling.
+ */
+
+ if (apbt_freq < APBT_MIN_FREQ || apbt_freq > APBT_MAX_FREQ) {
+ pr_debug("APBT has invalid freq 0x%llx\n", apbt_freq);
+ goto out_noapbt;
+ }
+ if (apbt_clocksource_register()) {
+ pr_debug("APBT has failed to register clocksource\n");
+ goto out_noapbt;
+ }
+ if (!apbt_clockevent_register())
+ apb_timer_block_enabled = 1;
+ else {
+ pr_debug("APBT has failed to register clockevent\n");
+ goto out_noapbt;
+ }
+#ifdef CONFIG_SMP
+ /* kernel cmdline disable apb timer, so we will use lapic timers */
+ if (disable_apbt_percpu) {
+ printk(KERN_INFO "apbt: disabled per cpu timer\n");
+ return;
+ }
+ pr_debug("%s: %d CPUs online\n", __func__, num_online_cpus());
+ if (num_possible_cpus() <= sfi_mtimer_num) {
+ percpu_timer = 1;
+ apbt_num_timers_used = num_possible_cpus();
+ } else {
+ percpu_timer = 0;
+ apbt_num_timers_used = 1;
+ adev = &per_cpu(cpu_apbt_dev, 0);
+ adev->flags &= ~APBT_DEV_USED;
+ }
+ pr_debug("%s: %d APB timers used\n", __func__, apbt_num_timers_used);
+
+ /* here we set up per CPU timer data structure */
+ apbt_devs = kzalloc(sizeof(struct apbt_dev) * apbt_num_timers_used,
+ GFP_KERNEL);
+ if (!apbt_devs) {
+ printk(KERN_ERR "Failed to allocate APB timer devices\n");
+ return;
+ }
+ for (i = 0; i < apbt_num_timers_used; i++) {
+ adev = &per_cpu(cpu_apbt_dev, i);
+ adev->num = i;
+ adev->cpu = i;
+ p_mtmr = sfi_get_mtmr(i);
+ if (p_mtmr) {
+ adev->tick = p_mtmr->freq_hz;
+ adev->irq = p_mtmr->irq;
+ } else
+ printk(KERN_ERR "Failed to get timer for cpu %d\n", i);
+ adev->count = 0;
+ sprintf(adev->name, "apbt%d", i);
+ }
+#endif
+
+ return;
+
+out_noapbt:
+ apbt_clear_mapping();
+ apb_timer_block_enabled = 0;
+ panic("failed to enable APB timer\n");
+}
+
+static inline void apbt_disable(int n)
+{
+ if (is_apbt_capable()) {
+ unsigned long ctrl = apbt_readl(n, APBTMR_N_CONTROL);
+ ctrl &= ~APBTMR_CONTROL_ENABLE;
+ apbt_writel(n, ctrl, APBTMR_N_CONTROL);
+ }
+}
+
+/* called before apb_timer_enable, use early map */
+unsigned long apbt_quick_calibrate()
+{
+ int i, scale;
+ u64 old, new;
+ cycle_t t1, t2;
+ unsigned long khz = 0;
+ u32 loop, shift;
+
+ apbt_set_mapping();
+ apbt_start_counter(phy_cs_timer_id);
+
+ /* check if the timer can count down, otherwise return */
+ old = apbt_read_clocksource(&clocksource_apbt);
+ i = 10000;
+ while (--i) {
+ if (old != apbt_read_clocksource(&clocksource_apbt))
+ break;
+ }
+ if (!i)
+ goto failed;
+
+ /* count 16 ms */
+ loop = (apbt_freq * 1000) << 4;
+
+ /* restart the timer to ensure it won't get to 0 in the calibration */
+ apbt_start_counter(phy_cs_timer_id);
+
+ old = apbt_read_clocksource(&clocksource_apbt);
+ old += loop;
+
+ t1 = __native_read_tsc();
+
+ do {
+ new = apbt_read_clocksource(&clocksource_apbt);
+ } while (new < old);
+
+ t2 = __native_read_tsc();
+
+ shift = 5;
+ if (unlikely(loop >> shift == 0)) {
+ printk(KERN_INFO
+ "APBT TSC calibration failed, not enough resolution\n");
+ return 0;
+ }
+ scale = (int)div_u64((t2 - t1), loop >> shift);
+ khz = (scale * apbt_freq * 1000) >> shift;
+ printk(KERN_INFO "TSC freq calculated by APB timer is %lu khz\n", khz);
+ return khz;
+failed:
+ return 0;
+}
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 6e29b2a77aa..00187f1fcfb 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1390,7 +1390,7 @@ void __init enable_IR_x2apic(void)
}
local_irq_save(flags);
- mask_8259A();
+ legacy_pic->mask_all();
mask_IO_APIC_setup(ioapic_entries);
if (dmar_table_init_ret)
@@ -1422,7 +1422,7 @@ void __init enable_IR_x2apic(void)
nox2apic:
if (!ret) /* IR enabling failed */
restore_IO_APIC_setup(ioapic_entries);
- unmask_8259A();
+ legacy_pic->restore_mask();
local_irq_restore(flags);
out:
@@ -2018,7 +2018,7 @@ static int lapic_resume(struct sys_device *dev)
}
mask_IO_APIC_setup(ioapic_entries);
- mask_8259A();
+ legacy_pic->mask_all();
}
if (x2apic_mode)
@@ -2062,7 +2062,7 @@ static int lapic_resume(struct sys_device *dev)
if (intr_remapping_enabled) {
reenable_intr_remapping(x2apic_mode);
- unmask_8259A();
+ legacy_pic->restore_mask();
restore_IO_APIC_setup(ioapic_entries);
free_ioapic_entries(ioapic_entries);
}
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 14862f11cc4..e4e0ddcb154 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -143,12 +143,6 @@ static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
static struct irq_cfg irq_cfgx[NR_IRQS];
#endif
-void __init io_apic_disable_legacy(void)
-{
- nr_legacy_irqs = 0;
- nr_irqs_gsi = 0;
-}
-
int __init arch_early_irq_init(void)
{
struct irq_cfg *cfg;
@@ -157,6 +151,11 @@ int __init arch_early_irq_init(void)
int node;
int i;
+ if (!legacy_pic->nr_legacy_irqs) {
+ nr_irqs_gsi = 0;
+ io_apic_irqs = ~0UL;
+ }
+
cfg = irq_cfgx;
count = ARRAY_SIZE(irq_cfgx);
node= cpu_to_node(boot_cpu_id);
@@ -170,7 +169,7 @@ int __init arch_early_irq_init(void)
* For legacy IRQ's, start with assigning irq0 to irq15 to
* IRQ0_VECTOR to IRQ15_VECTOR on cpu 0.
*/
- if (i < nr_legacy_irqs) {
+ if (i < legacy_pic->nr_legacy_irqs) {
cfg[i].vector = IRQ0_VECTOR + i;
cpumask_set_cpu(0, cfg[i].domain);
}
@@ -852,7 +851,7 @@ static int __init find_isa_irq_apic(int irq, int type)
*/
static int EISA_ELCR(unsigned int irq)
{
- if (irq < nr_legacy_irqs) {
+ if (irq < legacy_pic->nr_legacy_irqs) {
unsigned int port = 0x4d0 + (irq >> 3);
return (inb(port) >> (irq & 7)) & 1;
}
@@ -1439,7 +1438,7 @@ static void setup_IO_APIC_irq(int apic_id, int pin, unsigned int irq, struct irq
* controllers like 8259. Now that IO-APIC can handle this irq, update
* the cfg->domain.
*/
- if (irq < nr_legacy_irqs && cpumask_test_cpu(0, cfg->domain))
+ if (irq < legacy_pic->nr_legacy_irqs && cpumask_test_cpu(0, cfg->domain))
apic->vector_allocation_domain(0, cfg->domain);
if (assign_irq_vector(irq, cfg, apic->target_cpus()))
@@ -1463,8 +1462,8 @@ static void setup_IO_APIC_irq(int apic_id, int pin, unsigned int irq, struct irq
}
ioapic_register_intr(irq, desc, trigger);
- if (irq < nr_legacy_irqs)
- disable_8259A_irq(irq);
+ if (irq < legacy_pic->nr_legacy_irqs)
+ legacy_pic->chip->mask(irq);
ioapic_write_entry(apic_id, pin, entry);
}
@@ -1873,7 +1872,7 @@ __apicdebuginit(void) print_PIC(void)
unsigned int v;
unsigned long flags;
- if (!nr_legacy_irqs)
+ if (!legacy_pic->nr_legacy_irqs)
return;
printk(KERN_DEBUG "\nprinting PIC contents\n");
@@ -1957,7 +1956,7 @@ void __init enable_IO_APIC(void)
nr_ioapic_registers[apic] = reg_01.bits.entries+1;
}
- if (!nr_legacy_irqs)
+ if (!legacy_pic->nr_legacy_irqs)
return;
for(apic = 0; apic < nr_ioapics; apic++) {
@@ -2014,7 +2013,7 @@ void disable_IO_APIC(void)
*/
clear_IO_APIC();
- if (!nr_legacy_irqs)
+ if (!legacy_pic->nr_legacy_irqs)
return;
/*
@@ -2247,9 +2246,9 @@ static unsigned int startup_ioapic_irq(unsigned int irq)
struct irq_cfg *cfg;
raw_spin_lock_irqsave(&ioapic_lock, flags);
- if (irq < nr_legacy_irqs) {
- disable_8259A_irq(irq);
- if (i8259A_irq_pending(irq))
+ if (irq < legacy_pic->nr_legacy_irqs) {
+ legacy_pic->chip->mask(irq);
+ if (legacy_pic->irq_pending(irq))
was_pending = 1;
}
cfg = irq_cfg(irq);
@@ -2782,8 +2781,8 @@ static inline void init_IO_APIC_traps(void)
* so default to an old-fashioned 8259
* interrupt if we can..
*/
- if (irq < nr_legacy_irqs)
- make_8259A_irq(irq);
+ if (irq < legacy_pic->nr_legacy_irqs)
+ legacy_pic->make_irq(irq);
else
/* Strange. Oh, well.. */
desc->chip = &no_irq_chip;
@@ -2940,7 +2939,7 @@ static inline void __init check_timer(void)
/*
* get/set the timer IRQ vector:
*/
- disable_8259A_irq(0);
+ legacy_pic->chip->mask(0);
assign_irq_vector(0, cfg, apic->target_cpus());
/*
@@ -2953,7 +2952,7 @@ static inline void __init check_timer(void)
* automatically.
*/
apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
- init_8259A(1);
+ legacy_pic->init(1);
#ifdef CONFIG_X86_32
{
unsigned int ver;
@@ -3012,7 +3011,7 @@ static inline void __init check_timer(void)
if (timer_irq_works()) {
if (nmi_watchdog == NMI_IO_APIC) {
setup_nmi();
- enable_8259A_irq(0);
+ legacy_pic->chip->unmask(0);
}
if (disable_timer_pin_1 > 0)
clear_IO_APIC_pin(0, pin1);
@@ -3035,14 +3034,14 @@ static inline void __init check_timer(void)
*/
replace_pin_at_irq_node(cfg, node, apic1, pin1, apic2, pin2);
setup_timer_IRQ0_pin(apic2, pin2, cfg->vector);
- enable_8259A_irq(0);
+ legacy_pic->chip->unmask(0);
if (timer_irq_works()) {
apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
timer_through_8259 = 1;
if (nmi_watchdog == NMI_IO_APIC) {
- disable_8259A_irq(0);
+ legacy_pic->chip->mask(0);
setup_nmi();
- enable_8259A_irq(0);
+ legacy_pic->chip->unmask(0);
}
goto out;
}
@@ -3050,7 +3049,7 @@ static inline void __init check_timer(void)
* Cleanup, just in case ...
*/
local_irq_disable();
- disable_8259A_irq(0);
+ legacy_pic->chip->mask(0);
clear_IO_APIC_pin(apic2, pin2);
apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n");
}
@@ -3069,22 +3068,22 @@ static inline void __init check_timer(void)
lapic_register_intr(0, desc);
apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */
- enable_8259A_irq(0);
+ legacy_pic->chip->unmask(0);
if (timer_irq_works()) {
apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
goto out;
}
local_irq_disable();
- disable_8259A_irq(0);
+ legacy_pic->chip->mask(0);
apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n");
apic_printk(APIC_QUIET, KERN_INFO
"...trying to set up timer as ExtINT IRQ...\n");
- init_8259A(0);
- make_8259A_irq(0);
+ legacy_pic->init(0);
+ legacy_pic->make_irq(0);
apic_write(APIC_LVT0, APIC_DM_EXTINT);
unlock_ExtINT_logic();
@@ -3126,7 +3125,7 @@ void __init setup_IO_APIC(void)
/*
* calling enable_IO_APIC() is moved to setup_local_APIC for BP
*/
- io_apic_irqs = nr_legacy_irqs ? ~PIC_IRQS : ~0UL;
+ io_apic_irqs = legacy_pic->nr_legacy_irqs ? ~PIC_IRQS : ~0UL;
apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
/*
@@ -3137,7 +3136,7 @@ void __init setup_IO_APIC(void)
sync_Arb_IDs();
setup_IO_APIC_irqs();
init_IO_APIC_traps();
- if (nr_legacy_irqs)
+ if (legacy_pic->nr_legacy_irqs)
check_timer();
}
@@ -3928,7 +3927,7 @@ static int __io_apic_set_pci_routing(struct device *dev, int irq,
/*
* IRQs < 16 are already in the irq_2_pin[] map
*/
- if (irq >= nr_legacy_irqs) {
+ if (irq >= legacy_pic->nr_legacy_irqs) {
cfg = desc->chip_data;
if (add_pin_to_irq_node_nopanic(cfg, node, ioapic, pin)) {
printk(KERN_INFO "can not add pin %d for irq %d\n",
@@ -4302,3 +4301,24 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
nr_ioapics++;
}
+
+/* Enable IOAPIC early just for system timer */
+void __init pre_init_apic_IRQ0(void)
+{
+ struct irq_cfg *cfg;
+ struct irq_desc *desc;
+
+ printk(KERN_INFO "Early APIC setup for system timer0\n");
+#ifndef CONFIG_SMP
+ phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
+#endif
+ desc = irq_to_desc_alloc_node(0, 0);
+
+ setup_local_APIC();
+
+ cfg = irq_cfg(0);
+ add_pin_to_irq_node(cfg, 0, 0, 0);
+ set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge");
+
+ setup_IO_APIC_irq(0, 0, 0, desc, 0, 0);
+}
diff --git a/arch/x86/kernel/apic/nmi.c b/arch/x86/kernel/apic/nmi.c
index bd7c96b5e8d..8aa65adbd25 100644
--- a/arch/x86/kernel/apic/nmi.c
+++ b/arch/x86/kernel/apic/nmi.c
@@ -177,7 +177,7 @@ int __init check_nmi_watchdog(void)
error:
if (nmi_watchdog == NMI_IO_APIC) {
if (!timer_through_8259)
- disable_8259A_irq(0);
+ legacy_pic->chip->mask(0);
on_each_cpu(__acpi_nmi_disable, NULL, 1);
}
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index 47dd856708e..3e28401f161 100644
--- a/arch/x86/kernel/apic/numaq_32.c
+++ b/arch/x86/kernel/apic/numaq_32.c
@@ -277,6 +277,7 @@ static __init void early_check_numaq(void)
x86_init.mpparse.mpc_oem_pci_bus = mpc_oem_pci_bus;
x86_init.mpparse.mpc_oem_bus_info = mpc_oem_bus_info;
x86_init.timers.tsc_pre_init = numaq_tsc_init;
+ x86_init.pci.init = pci_numaq_init;
}
}
diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c
index 8c93a84bb62..fb725ee15f5 100644
--- a/arch/x86/kernel/i8259.c
+++ b/arch/x86/kernel/i8259.c
@@ -34,6 +34,12 @@
static int i8259A_auto_eoi;
DEFINE_RAW_SPINLOCK(i8259A_lock);
static void mask_and_ack_8259A(unsigned int);
+static void mask_8259A(void);
+static void unmask_8259A(void);
+static void disable_8259A_irq(unsigned int irq);
+static void enable_8259A_irq(unsigned int irq);
+static void init_8259A(int auto_eoi);
+static int i8259A_irq_pending(unsigned int irq);
struct irq_chip i8259A_chip = {
.name = "XT-PIC",
@@ -63,7 +69,7 @@ unsigned int cached_irq_mask = 0xffff;
*/
unsigned long io_apic_irqs;
-void disable_8259A_irq(unsigned int irq)
+static void disable_8259A_irq(unsigned int irq)
{
unsigned int mask = 1 << irq;
unsigned long flags;
@@ -77,7 +83,7 @@ void disable_8259A_irq(unsigned int irq)
raw_spin_unlock_irqrestore(&i8259A_lock, flags);
}
-void enable_8259A_irq(unsigned int irq)
+static void enable_8259A_irq(unsigned int irq)
{
unsigned int mask = ~(1 << irq);
unsigned long flags;
@@ -91,7 +97,7 @@ void enable_8259A_irq(unsigned int irq)
raw_spin_unlock_irqrestore(&i8259A_lock, flags);
}
-int i8259A_irq_pending(unsigned int irq)
+static int i8259A_irq_pending(unsigned int irq)
{
unsigned int mask = 1<<irq;
unsigned long flags;
@@ -107,7 +113,7 @@ int i8259A_irq_pending(unsigned int irq)
return ret;
}
-void make_8259A_irq(unsigned int irq)
+static void make_8259A_irq(unsigned int irq)
{
disable_irq_nosync(irq);
io_apic_irqs &= ~(1<<irq);
@@ -281,7 +287,7 @@ static int __init i8259A_init_sysfs(void)
device_initcall(i8259A_init_sysfs);
-void mask_8259A(void)
+static void mask_8259A(void)
{
unsigned long flags;
@@ -293,7 +299,7 @@ void mask_8259A(void)
raw_spin_unlock_irqrestore(&i8259A_lock, flags);
}
-void unmask_8259A(void)
+static void unmask_8259A(void)
{
unsigned long flags;
@@ -305,7 +311,7 @@ void unmask_8259A(void)
raw_spin_unlock_irqrestore(&i8259A_lock, flags);
}
-void init_8259A(int auto_eoi)
+static void init_8259A(int auto_eoi)
{
unsigned long flags;
@@ -358,3 +364,47 @@ void init_8259A(int auto_eoi)
raw_spin_unlock_irqrestore(&i8259A_lock, flags);
}
+
+/*
+ * make i8259 a driver so that we can select pic functions at run time. the goal
+ * is to make x86 binary compatible among pc compatible and non-pc compatible
+ * platforms, such as x86 MID.
+ */
+
+static void legacy_pic_noop(void) { };
+static void legacy_pic_uint_noop(unsigned int unused) { };
+static void legacy_pic_int_noop(int unused) { };
+
+static struct irq_chip dummy_pic_chip = {
+ .name = "dummy pic",
+ .mask = legacy_pic_uint_noop,
+ .unmask = legacy_pic_uint_noop,
+ .disable = legacy_pic_uint_noop,
+ .mask_ack = legacy_pic_uint_noop,
+};
+static int legacy_pic_irq_pending_noop(unsigned int irq)
+{
+ return 0;
+}
+
+struct legacy_pic null_legacy_pic = {
+ .nr_legacy_irqs = 0,
+ .chip = &dummy_pic_chip,
+ .mask_all = legacy_pic_noop,
+ .restore_mask = legacy_pic_noop,
+ .init = legacy_pic_int_noop,
+ .irq_pending = legacy_pic_irq_pending_noop,
+ .make_irq = legacy_pic_uint_noop,
+};
+
+struct legacy_pic default_legacy_pic = {
+ .nr_legacy_irqs = NR_IRQS_LEGACY,
+ .chip = &i8259A_chip,
+ .mask_all = mask_8259A,
+ .restore_mask = unmask_8259A,
+ .init = init_8259A,
+ .irq_pending = i8259A_irq_pending,
+ .make_irq = make_8259A_irq,
+};
+
+struct legacy_pic *legacy_pic = &default_legacy_pic;
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index fce55d53263..ef257fc2921 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -99,9 +99,6 @@ int vector_used_by_percpu_irq(unsigned int vector)
return 0;
}
-/* Number of legacy interrupts */
-int nr_legacy_irqs __read_mostly = NR_IRQS_LEGACY;
-
void __init init_ISA_irqs(void)
{
int i;
@@ -109,12 +106,12 @@ void __init init_ISA_irqs(void)
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
init_bsp_APIC();
#endif
- init_8259A(0);
+ legacy_pic->init(0);
/*
* 16 old-style INTA-cycle interrupts:
*/
- for (i = 0; i < NR_IRQS_LEGACY; i++) {
+ for (i = 0; i < legacy_pic->nr_legacy_irqs; i++) {
struct irq_desc *desc = irq_to_desc(i);
desc->status = IRQ_DISABLED;
@@ -138,7 +135,7 @@ void __init init_IRQ(void)
* then this vector space can be freed and re-used dynamically as the
* irq's migrate etc.
*/
- for (i = 0; i < nr_legacy_irqs; i++)
+ for (i = 0; i < legacy_pic->nr_legacy_irqs; i++)
per_cpu(vector_irq, 0)[IRQ0_VECTOR + i] = i;
x86_init.irqs.intr_init();
diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c
index 3b7078abc87..0aad8670858 100644
--- a/arch/x86/kernel/mrst.c
+++ b/arch/x86/kernel/mrst.c
@@ -10,8 +10,211 @@
* of the License.
*/
#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sfi.h>
+#include <linux/irq.h>
+#include <linux/module.h>
#include <asm/setup.h>
+#include <asm/mpspec_def.h>
+#include <asm/hw_irq.h>
+#include <asm/apic.h>
+#include <asm/io_apic.h>
+#include <asm/mrst.h>
+#include <asm/io.h>
+#include <asm/i8259.h>
+#include <asm/apb_timer.h>
+
+static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM];
+static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM];
+int sfi_mtimer_num;
+
+struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX];
+EXPORT_SYMBOL_GPL(sfi_mrtc_array);
+int sfi_mrtc_num;
+
+static inline void assign_to_mp_irq(struct mpc_intsrc *m,
+ struct mpc_intsrc *mp_irq)
+{
+ memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
+}
+
+static inline int mp_irq_cmp(struct mpc_intsrc *mp_irq,
+ struct mpc_intsrc *m)
+{
+ return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
+}
+
+static void save_mp_irq(struct mpc_intsrc *m)
+{
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+ if (!mp_irq_cmp(&mp_irqs[i], m))
+ return;
+ }
+
+ assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
+ if (++mp_irq_entries == MAX_IRQ_SOURCES)
+ panic("Max # of irq sources exceeded!!\n");
+}
+
+/* parse all the mtimer info to a static mtimer array */
+static int __init sfi_parse_mtmr(struct sfi_table_header *table)
+{
+ struct sfi_table_simple *sb;
+ struct sfi_timer_table_entry *pentry;
+ struct mpc_intsrc mp_irq;
+ int totallen;
+
+ sb = (struct sfi_table_simple *)table;
+ if (!sfi_mtimer_num) {
+ sfi_mtimer_num = SFI_GET_NUM_ENTRIES(sb,
+ struct sfi_timer_table_entry);
+ pentry = (struct sfi_timer_table_entry *) sb->pentry;
+ totallen = sfi_mtimer_num * sizeof(*pentry);
+ memcpy(sfi_mtimer_array, pentry, totallen);
+ }
+
+ printk(KERN_INFO "SFI: MTIMER info (num = %d):\n", sfi_mtimer_num);
+ pentry = sfi_mtimer_array;
+ for (totallen = 0; totallen < sfi_mtimer_num; totallen++, pentry++) {
+ printk(KERN_INFO "timer[%d]: paddr = 0x%08x, freq = %dHz,"
+ " irq = %d\n", totallen, (u32)pentry->phys_addr,
+ pentry->freq_hz, pentry->irq);
+ if (!pentry->irq)
+ continue;
+ mp_irq.type = MP_IOAPIC;
+ mp_irq.irqtype = mp_INT;
+/* triggering mode edge bit 2-3, active high polarity bit 0-1 */
+ mp_irq.irqflag = 5;
+ mp_irq.srcbus = 0;
+ mp_irq.srcbusirq = pentry->irq; /* IRQ */
+ mp_irq.dstapic = MP_APIC_ALL;
+ mp_irq.dstirq = pentry->irq;
+ save_mp_irq(&mp_irq);
+ }
+
+ return 0;
+}
+
+struct sfi_timer_table_entry *sfi_get_mtmr(int hint)
+{
+ int i;
+ if (hint < sfi_mtimer_num) {
+ if (!sfi_mtimer_usage[hint]) {
+ pr_debug("hint taken for timer %d irq %d\n",\
+ hint, sfi_mtimer_array[hint].irq);
+ sfi_mtimer_usage[hint] = 1;
+ return &sfi_mtimer_array[hint];
+ }
+ }
+ /* take the first timer available */
+ for (i = 0; i < sfi_mtimer_num;) {
+ if (!sfi_mtimer_usage[i]) {
+ sfi_mtimer_usage[i] = 1;
+ return &sfi_mtimer_array[i];
+ }
+ i++;
+ }
+ return NULL;
+}
+
+void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr)
+{
+ int i;
+ for (i = 0; i < sfi_mtimer_num;) {
+ if (mtmr->irq == sfi_mtimer_array[i].irq) {
+ sfi_mtimer_usage[i] = 0;
+ return;
+ }
+ i++;
+ }
+}
+
+/* parse all the mrtc info to a global mrtc array */
+int __init sfi_parse_mrtc(struct sfi_table_header *table)
+{
+ struct sfi_table_simple *sb;
+ struct sfi_rtc_table_entry *pentry;
+ struct mpc_intsrc mp_irq;
+
+ int totallen;
+
+ sb = (struct sfi_table_simple *)table;
+ if (!sfi_mrtc_num) {
+ sfi_mrtc_num = SFI_GET_NUM_ENTRIES(sb,
+ struct sfi_rtc_table_entry);
+ pentry = (struct sfi_rtc_table_entry *)sb->pentry;
+ totallen = sfi_mrtc_num * sizeof(*pentry);
+ memcpy(sfi_mrtc_array, pentry, totallen);
+ }
+
+ printk(KERN_INFO "SFI: RTC info (num = %d):\n", sfi_mrtc_num);
+ pentry = sfi_mrtc_array;
+ for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) {
+ printk(KERN_INFO "RTC[%d]: paddr = 0x%08x, irq = %d\n",
+ totallen, (u32)pentry->phys_addr, pentry->irq);
+ mp_irq.type = MP_IOAPIC;
+ mp_irq.irqtype = mp_INT;
+ mp_irq.irqflag = 0;
+ mp_irq.srcbus = 0;
+ mp_irq.srcbusirq = pentry->irq; /* IRQ */
+ mp_irq.dstapic = MP_APIC_ALL;
+ mp_irq.dstirq = pentry->irq;
+ save_mp_irq(&mp_irq);
+ }
+ return 0;
+}
+
+/*
+ * the secondary clock in Moorestown can be APBT or LAPIC clock, default to
+ * APBT but cmdline option can also override it.
+ */
+static void __cpuinit mrst_setup_secondary_clock(void)
+{
+ /* restore default lapic clock if disabled by cmdline */
+ if (disable_apbt_percpu)
+ return setup_secondary_APIC_clock();
+ apbt_setup_secondary_clock();
+}
+
+static unsigned long __init mrst_calibrate_tsc(void)
+{
+ unsigned long flags, fast_calibrate;
+
+ local_irq_save(flags);
+ fast_calibrate = apbt_quick_calibrate();
+ local_irq_restore(flags);
+
+ if (fast_calibrate)
+ return fast_calibrate;
+
+ return 0;
+}
+
+void __init mrst_time_init(void)
+{
+ sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
+ pre_init_apic_IRQ0();
+ apbt_time_init();
+}
+
+void __init mrst_rtc_init(void)
+{
+ sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
+}
+
+/*
+ * if we use per cpu apb timer, the bootclock already setup. if we use lapic
+ * timer and one apbt timer for broadcast, we need to set up lapic boot clock.
+ */
+static void __init mrst_setup_boot_clock(void)
+{
+ pr_info("%s: per cpu apbt flag %d \n", __func__, disable_apbt_percpu);
+ if (disable_apbt_percpu)
+ setup_boot_APIC_clock();
+};
/*
* Moorestown specific x86_init function overrides and early setup
@@ -21,4 +224,17 @@ void __init x86_mrst_early_setup(void)
{
x86_init.resources.probe_roms = x86_init_noop;
x86_init.resources.reserve_resources = x86_init_noop;
+
+ x86_init.timers.timer_init = mrst_time_init;
+ x86_init.timers.setup_percpu_clockev = mrst_setup_boot_clock;
+
+ x86_init.irqs.pre_vector_init = x86_init_noop;
+
+ x86_cpuinit.setup_percpu_clockev = mrst_setup_secondary_clock;
+
+ x86_platform.calibrate_tsc = mrst_calibrate_tsc;
+ x86_init.pci.init = pci_mrst_init;
+ x86_init.pci.fixup_irqs = x86_init_noop;
+
+ legacy_pic = &null_legacy_pic;
}
diff --git a/arch/x86/kernel/olpc.c b/arch/x86/kernel/olpc.c
index 9d1d263f786..8297160c41b 100644
--- a/arch/x86/kernel/olpc.c
+++ b/arch/x86/kernel/olpc.c
@@ -17,7 +17,9 @@
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/string.h>
+
#include <asm/geode.h>
+#include <asm/setup.h>
#include <asm/olpc.h>
#ifdef CONFIG_OPEN_FIRMWARE
@@ -243,9 +245,11 @@ static int __init olpc_init(void)
olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
(unsigned char *) &olpc_platform_info.ecver, 1);
- /* check to see if the VSA exists */
- if (cs5535_has_vsa2())
- olpc_platform_info.flags |= OLPC_F_VSA;
+#ifdef CONFIG_PCI_OLPC
+ /* If the VSA exists let it emulate PCI, if not emulate in kernel */
+ if (!cs5535_has_vsa2())
+ x86_init.pci.arch_init = pci_olpc_init;
+#endif
printk(KERN_INFO "OLPC board revision %s%X (EC=%x)\n",
((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a435c76d714..a02e80c3c54 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -48,6 +48,7 @@
#include <linux/err.h>
#include <linux/nmi.h>
#include <linux/tboot.h>
+#include <linux/stackprotector.h>
#include <asm/acpi.h>
#include <asm/desc.h>
@@ -67,6 +68,7 @@
#include <linux/mc146818rtc.h>
#include <asm/smpboot_hooks.h>
+#include <asm/i8259.h>
#ifdef CONFIG_X86_32
u8 apicid_2_node[MAX_APICID];
@@ -291,9 +293,9 @@ notrace static void __cpuinit start_secondary(void *unused)
check_tsc_sync_target();
if (nmi_watchdog == NMI_IO_APIC) {
- disable_8259A_irq(0);
+ legacy_pic->chip->mask(0);
enable_NMI_through_LVT0();
- enable_8259A_irq(0);
+ legacy_pic->chip->unmask(0);
}
#ifdef CONFIG_X86_32
@@ -329,6 +331,9 @@ notrace static void __cpuinit start_secondary(void *unused)
/* enable local interrupts */
local_irq_enable();
+ /* to prevent fake stack check failure in clock setup */
+ boot_init_stack_canary();
+
x86_cpuinit.setup_percpu_clockev();
wmb();
diff --git a/arch/x86/kernel/visws_quirks.c b/arch/x86/kernel/visws_quirks.c
index ab38ce0984f..e680ea52db9 100644
--- a/arch/x86/kernel/visws_quirks.c
+++ b/arch/x86/kernel/visws_quirks.c
@@ -49,11 +49,6 @@ extern int no_broadcast;
char visws_board_type = -1;
char visws_board_rev = -1;
-int is_visws_box(void)
-{
- return visws_board_type >= 0;
-}
-
static void __init visws_time_init(void)
{
printk(KERN_INFO "Starting Cobalt Timer system clock\n");
@@ -242,6 +237,8 @@ void __init visws_early_detect(void)
x86_init.irqs.pre_vector_init = visws_pre_intr_init;
x86_init.irqs.trap_init = visws_trap_init;
x86_init.timers.timer_init = visws_time_init;
+ x86_init.pci.init = pci_visws_init;
+ x86_init.pci.init_irq = x86_init_noop;
/*
* Install reboot quirks:
@@ -508,7 +505,7 @@ static struct irq_chip cobalt_irq_type = {
*/
static unsigned int startup_piix4_master_irq(unsigned int irq)
{
- init_8259A(0);
+ legacy_pic->init(0);
return startup_cobalt_irq(irq);
}
@@ -532,9 +529,6 @@ static struct irq_chip piix4_master_irq_type = {
static struct irq_chip piix4_virtual_irq_type = {
.name = "PIIX4-virtual",
- .shutdown = disable_8259A_irq,
- .enable = enable_8259A_irq,
- .disable = disable_8259A_irq,
};
@@ -609,7 +603,7 @@ static irqreturn_t piix4_master_intr(int irq, void *dev_id)
handle_IRQ_event(realirq, desc->action);
if (!(desc->status & IRQ_DISABLED))
- enable_8259A_irq(realirq);
+ legacy_pic->chip->unmask(realirq);
return IRQ_HANDLED;
@@ -628,6 +622,12 @@ static struct irqaction cascade_action = {
.name = "cascade",
};
+static inline void set_piix4_virtual_irq_type(void)
+{
+ piix4_virtual_irq_type.shutdown = i8259A_chip.mask;
+ piix4_virtual_irq_type.enable = i8259A_chip.unmask;
+ piix4_virtual_irq_type.disable = i8259A_chip.mask;
+}
void init_VISWS_APIC_irqs(void)
{
@@ -653,6 +653,7 @@ void init_VISWS_APIC_irqs(void)
desc->chip = &piix4_master_irq_type;
}
else if (i < CO_IRQ_APIC0) {
+ set_piix4_virtual_irq_type();
desc->chip = &piix4_virtual_irq_type;
}
else if (IS_CO_APIC(i)) {
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index ee5746c9462..61a1e8c7e19 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -4,9 +4,11 @@
* For licencing details see kernel-base/COPYING
*/
#include <linux/init.h>
+#include <linux/ioport.h>
#include <asm/bios_ebda.h>
#include <asm/paravirt.h>
+#include <asm/pci_x86.h>
#include <asm/mpspec.h>
#include <asm/setup.h>
#include <asm/apic.h>
@@ -70,6 +72,12 @@ struct x86_init_ops x86_init __initdata = {
.iommu = {
.iommu_init = iommu_init_noop,
},
+
+ .pci = {
+ .init = x86_default_pci_init,
+ .init_irq = x86_default_pci_init_irq,
+ .fixup_irqs = x86_default_pci_fixup_irqs,
+ },
};
struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 18:42:24 +0000