#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/bootmem.h>
-#include <linux/smp_lock.h>
#include <linux/interrupt.h>
#include <linux/mc146818rtc.h>
#include <linux/kernel_stat.h>
int disable_apic_timer __initdata;
+/* Local APIC timer works in C2? */
+int local_apic_timer_c2_ok;
+EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
+
static struct resource *ioapic_resources;
static struct resource lapic_resource = {
.name = "Local APIC",
static void apic_pm_activate(void);
+void apic_wait_icr_idle(void)
+{
+ while (apic_read(APIC_ICR) & APIC_ICR_BUSY)
+ cpu_relax();
+}
+
+unsigned int safe_apic_wait_icr_idle(void)
+{
+ unsigned int send_status;
+ int timeout;
+
+ timeout = 0;
+ do {
+ send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
+ if (!send_status)
+ break;
+ udelay(100);
+ } while (timeout++ < 1000);
+
+ return send_status;
+}
+
void enable_NMI_through_LVT0 (void * dummy)
{
unsigned int v;
-
- v = APIC_DM_NMI; /* unmask and set to NMI */
+
+ /* unmask and set to NMI */
+ v = APIC_DM_NMI;
apic_write(APIC_LVT0, v);
}
* holds up an irq slot - in excessive cases (when multiple
* unexpected vectors occur) that might lock up the APIC
* completely.
- * But don't ack when the APIC is disabled. -AK
+ * But don't ack when the APIC is disabled. -AK
*/
if (!disable_apic)
ack_APIC_irq();
* Detect and enable local APICs on non-SMP boards.
* Original code written by Keir Fraser.
* On AMD64 we trust the BIOS - if it says no APIC it is likely
- * not correctly set up (usually the APIC timer won't work etc.)
+ * not correctly set up (usually the APIC timer won't work etc.)
*/
static int __init detect_init_APIC (void)
local_irq_save(flags);
/* wait for irq slice */
- if (hpet_address && hpet_use_timer) {
- int trigger = hpet_readl(HPET_T0_CMP);
- while (hpet_readl(HPET_COUNTER) >= trigger)
- /* do nothing */ ;
- while (hpet_readl(HPET_COUNTER) < trigger)
- /* do nothing */ ;
- } else {
+ if (hpet_address && hpet_use_timer) {
+ int trigger = hpet_readl(HPET_T0_CMP);
+ while (hpet_readl(HPET_COUNTER) >= trigger)
+ /* do nothing */ ;
+ while (hpet_readl(HPET_COUNTER) < trigger)
+ /* do nothing */ ;
+ } else {
int c1, c2;
outb_p(0x00, 0x43);
c2 = inb_p(0x40);
static int __init calibrate_APIC_clock(void)
{
- int apic, apic_start, tsc, tsc_start;
+ unsigned apic, apic_start;
+ unsigned long tsc, tsc_start;
int result;
/*
* Put whatever arbitrary (but long enough) timeout
* value into the APIC clock, we just want to get the
* counter running for calibration.
*/
- __setup_APIC_LVTT(1000000000);
+ __setup_APIC_LVTT(4000000000);
apic_start = apic_read(APIC_TMCCT);
#ifdef CONFIG_X86_PM_TIMER
} else
#endif
{
- rdtscl(tsc_start);
+ rdtscll(tsc_start);
do {
apic = apic_read(APIC_TMCCT);
- rdtscl(tsc);
+ rdtscll(tsc);
} while ((tsc - tsc_start) < TICK_COUNT &&
- (apic - apic_start) < TICK_COUNT);
+ (apic_start - apic) < TICK_COUNT);
- result = (apic_start - apic) * 1000L * cpu_khz /
+ result = (apic_start - apic) * 1000L * tsc_khz /
(tsc - tsc_start);
}
printk("result %d\n", result);
void __init setup_boot_APIC_clock (void)
{
- if (disable_apic_timer) {
- printk(KERN_INFO "Disabling APIC timer\n");
- return;
- }
+ if (disable_apic_timer) {
+ printk(KERN_INFO "Disabling APIC timer\n");
+ return;
+ }
printk(KERN_INFO "Using local APIC timer interrupts.\n");
using_apic_timer = 1;
void smp_send_timer_broadcast_ipi(void)
{
+ int cpu = smp_processor_id();
cpumask_t mask;
cpus_and(mask, cpu_online_map, timer_interrupt_broadcast_ipi_mask);
+
+ if (cpu_isset(cpu, mask)) {
+ cpu_clear(cpu, mask);
+ add_pda(apic_timer_irqs, 1);
+ smp_local_timer_interrupt();
+ }
+
if (!cpus_empty(mask)) {
send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
}
return -EINVAL;
}
-void setup_APIC_extened_lvt(unsigned char lvt_off, unsigned char vector,
- unsigned char msg_type, unsigned char mask)
+void setup_APIC_extended_lvt(unsigned char lvt_off, unsigned char vector,
+ unsigned char msg_type, unsigned char mask)
{
unsigned long reg = (lvt_off << 4) + K8_APIC_EXT_LVT_BASE;
unsigned int v = (mask << 16) | (msg_type << 8) | vector;
if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
ack_APIC_irq();
-#if 0
- static unsigned long last_warning;
- static unsigned long skipped;
-
- /* see sw-dev-man vol 3, chapter 7.4.13.5 */
- if (time_before(last_warning+30*HZ,jiffies)) {
- printk(KERN_INFO "spurious APIC interrupt on CPU#%d, %ld skipped.\n",
- smp_processor_id(), skipped);
- last_warning = jiffies;
- skipped = 0;
- } else {
- skipped++;
- }
-#endif
irq_exit();
}
7: Illegal register address
*/
printk (KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
- smp_processor_id(), v , v1);
+ smp_processor_id(), v , v1);
irq_exit();
}
-int disable_apic;
+int disable_apic;
/*
* This initializes the IO-APIC and APIC hardware if this is
*/
int __init APIC_init_uniprocessor (void)
{
- if (disable_apic) {
+ if (disable_apic) {
printk(KERN_INFO "Apic disabled\n");
- return -1;
+ return -1;
}
- if (!cpu_has_apic) {
+ if (!cpu_has_apic) {
disable_apic = 1;
printk(KERN_INFO "Apic disabled by BIOS\n");
return -1;
return 0;
}
-static __init int setup_disableapic(char *str)
-{
+static __init int setup_disableapic(char *str)
+{
disable_apic = 1;
clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
return 0;
early_param("disableapic", setup_disableapic);
/* same as disableapic, for compatibility */
-static __init int setup_nolapic(char *str)
-{
+static __init int setup_nolapic(char *str)
+{
return setup_disableapic(str);
-}
+}
early_param("nolapic", setup_nolapic);
-static __init int setup_noapictimer(char *str)
-{
+static int __init parse_lapic_timer_c2_ok(char *arg)
+{
+ local_apic_timer_c2_ok = 1;
+ return 0;
+}
+early_param("lapic_timer_c2_ok", parse_lapic_timer_c2_ok);
+
+static __init int setup_noapictimer(char *str)
+{
if (str[0] != ' ' && str[0] != 0)
return 0;
disable_apic_timer = 1;
return 1;
-}
+}
static __init int setup_apicmaintimer(char *str)
{
}
__setup("apicpmtimer", setup_apicpmtimer);
-__setup("noapictimer", setup_noapictimer);
+__setup("noapictimer", setup_noapictimer);
git.openpandora.org / pandora-kernel.git / blobdiff