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Diffstat (limited to 'arch/x86/kernel/apic_32.c')
-rw-r--r--arch/x86/kernel/apic_32.c158
1 files changed, 89 insertions, 69 deletions
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index edb5108e5d0e..35a568ea8400 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -43,12 +43,10 @@
#include <mach_apicdef.h>
#include <mach_ipi.h>
-#include "io_ports.h"
-
/*
* Sanity check
*/
-#if (SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F
+#if ((SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F)
# error SPURIOUS_APIC_VECTOR definition error
#endif
@@ -57,7 +55,7 @@
*
* -1=force-disable, +1=force-enable
*/
-static int enable_local_apic __initdata = 0;
+static int enable_local_apic __initdata;
/* Local APIC timer verification ok */
static int local_apic_timer_verify_ok;
@@ -101,6 +99,8 @@ static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
/* Local APIC was disabled by the BIOS and enabled by the kernel */
static int enabled_via_apicbase;
+static unsigned long apic_phys;
+
/*
* Get the LAPIC version
*/
@@ -110,7 +110,7 @@ static inline int lapic_get_version(void)
}
/*
- * Check, if the APIC is integrated or a seperate chip
+ * Check, if the APIC is integrated or a separate chip
*/
static inline int lapic_is_integrated(void)
{
@@ -135,9 +135,9 @@ void apic_wait_icr_idle(void)
cpu_relax();
}
-unsigned long safe_apic_wait_icr_idle(void)
+u32 safe_apic_wait_icr_idle(void)
{
- unsigned long send_status;
+ u32 send_status;
int timeout;
timeout = 0;
@@ -154,7 +154,7 @@ unsigned long safe_apic_wait_icr_idle(void)
/**
* enable_NMI_through_LVT0 - enable NMI through local vector table 0
*/
-void enable_NMI_through_LVT0 (void * dummy)
+void __cpuinit enable_NMI_through_LVT0(void)
{
unsigned int v = APIC_DM_NMI;
@@ -379,8 +379,10 @@ void __init setup_boot_APIC_clock(void)
*/
if (local_apic_timer_disabled) {
/* No broadcast on UP ! */
- if (num_possible_cpus() > 1)
+ if (num_possible_cpus() > 1) {
+ lapic_clockevent.mult = 1;
setup_APIC_timer();
+ }
return;
}
@@ -434,7 +436,7 @@ void __init setup_boot_APIC_clock(void)
"with PM Timer: %ldms instead of 100ms\n",
(long)res);
/* Correct the lapic counter value */
- res = (((u64) delta ) * pm_100ms);
+ res = (((u64) delta) * pm_100ms);
do_div(res, deltapm);
printk(KERN_INFO "APIC delta adjusted to PM-Timer: "
"%lu (%ld)\n", (unsigned long) res, delta);
@@ -472,6 +474,19 @@ void __init setup_boot_APIC_clock(void)
local_apic_timer_verify_ok = 1;
+ /*
+ * Do a sanity check on the APIC calibration result
+ */
+ if (calibration_result < (1000000 / HZ)) {
+ local_irq_enable();
+ printk(KERN_WARNING
+ "APIC frequency too slow, disabling apic timer\n");
+ /* No broadcast on UP ! */
+ if (num_possible_cpus() > 1)
+ setup_APIC_timer();
+ return;
+ }
+
/* We trust the pm timer based calibration */
if (!pm_referenced) {
apic_printk(APIC_VERBOSE, "... verify APIC timer\n");
@@ -563,6 +578,9 @@ static void local_apic_timer_interrupt(void)
return;
}
+ /*
+ * the NMI deadlock-detector uses this.
+ */
per_cpu(irq_stat, cpu).apic_timer_irqs++;
evt->event_handler(evt);
@@ -576,8 +594,7 @@ static void local_apic_timer_interrupt(void)
* [ if a single-CPU system runs an SMP kernel then we call the local
* interrupt as well. Thus we cannot inline the local irq ... ]
*/
-
-void fastcall smp_apic_timer_interrupt(struct pt_regs *regs)
+void smp_apic_timer_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@@ -616,9 +633,14 @@ int setup_profiling_timer(unsigned int multiplier)
*/
void clear_local_APIC(void)
{
- int maxlvt = lapic_get_maxlvt();
- unsigned long v;
+ int maxlvt;
+ u32 v;
+
+ /* APIC hasn't been mapped yet */
+ if (!apic_phys)
+ return;
+ maxlvt = lapic_get_maxlvt();
/*
* Masking an LVT entry can trigger a local APIC error
* if the vector is zero. Mask LVTERR first to prevent this.
@@ -976,7 +998,8 @@ void __cpuinit setup_local_APIC(void)
value |= APIC_LVT_LEVEL_TRIGGER;
apic_write_around(APIC_LVT1, value);
- if (integrated && !esr_disable) { /* !82489DX */
+ if (integrated && !esr_disable) {
+ /* !82489DX */
maxlvt = lapic_get_maxlvt();
if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
apic_write(APIC_ESR, 0);
@@ -1020,7 +1043,7 @@ void __cpuinit setup_local_APIC(void)
/*
* Detect and initialize APIC
*/
-static int __init detect_init_APIC (void)
+static int __init detect_init_APIC(void)
{
u32 h, l, features;
@@ -1077,7 +1100,7 @@ static int __init detect_init_APIC (void)
printk(KERN_WARNING "Could not enable APIC!\n");
return -1;
}
- set_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
+ set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
/* The BIOS may have set up the APIC at some other address */
@@ -1104,8 +1127,6 @@ no_apic:
*/
void __init init_apic_mappings(void)
{
- unsigned long apic_phys;
-
/*
* If no local APIC can be found then set up a fake all
* zeroes page to simulate the local APIC and another
@@ -1164,10 +1185,10 @@ fake_ioapic_page:
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
-int __init APIC_init_uniprocessor (void)
+int __init APIC_init_uniprocessor(void)
{
if (enable_local_apic < 0)
- clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
+ clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
if (!smp_found_config && !cpu_has_apic)
return -1;
@@ -1179,7 +1200,7 @@ int __init APIC_init_uniprocessor (void)
APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_physical_apicid);
- clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
+ clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
return -1;
}
@@ -1210,50 +1231,6 @@ int __init APIC_init_uniprocessor (void)
}
/*
- * APIC command line parameters
- */
-static int __init parse_lapic(char *arg)
-{
- enable_local_apic = 1;
- return 0;
-}
-early_param("lapic", parse_lapic);
-
-static int __init parse_nolapic(char *arg)
-{
- enable_local_apic = -1;
- clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
- return 0;
-}
-early_param("nolapic", parse_nolapic);
-
-static int __init parse_disable_lapic_timer(char *arg)
-{
- local_apic_timer_disabled = 1;
- return 0;
-}
-early_param("nolapic_timer", parse_disable_lapic_timer);
-
-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 int __init apic_set_verbosity(char *str)
-{
- if (strcmp("debug", str) == 0)
- apic_verbosity = APIC_DEBUG;
- else if (strcmp("verbose", str) == 0)
- apic_verbosity = APIC_VERBOSE;
- return 1;
-}
-
-__setup("apic=", apic_set_verbosity);
-
-
-/*
* Local APIC interrupts
*/
@@ -1306,7 +1283,7 @@ void smp_error_interrupt(struct pt_regs *regs)
6: Received illegal vector
7: Illegal register address
*/
- printk (KERN_DEBUG "APIC error on CPU%d: %02lx(%02lx)\n",
+ printk(KERN_DEBUG "APIC error on CPU%d: %02lx(%02lx)\n",
smp_processor_id(), v , v1);
irq_exit();
}
@@ -1393,7 +1370,7 @@ void disconnect_bsp_APIC(int virt_wire_setup)
value = apic_read(APIC_LVT0);
value &= ~(APIC_MODE_MASK | APIC_SEND_PENDING |
APIC_INPUT_POLARITY | APIC_LVT_REMOTE_IRR |
- APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED );
+ APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED);
value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING;
value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_EXTINT);
apic_write_around(APIC_LVT0, value);
@@ -1530,7 +1507,7 @@ static int lapic_resume(struct sys_device *dev)
*/
static struct sysdev_class lapic_sysclass = {
- set_kset_name("lapic"),
+ .name = "lapic",
.resume = lapic_resume,
.suspend = lapic_suspend,
};
@@ -1565,3 +1542,46 @@ device_initcall(init_lapic_sysfs);
static void apic_pm_activate(void) { }
#endif /* CONFIG_PM */
+
+/*
+ * APIC command line parameters
+ */
+static int __init parse_lapic(char *arg)
+{
+ enable_local_apic = 1;
+ return 0;
+}
+early_param("lapic", parse_lapic);
+
+static int __init parse_nolapic(char *arg)
+{
+ enable_local_apic = -1;
+ clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
+ return 0;
+}
+early_param("nolapic", parse_nolapic);
+
+static int __init parse_disable_lapic_timer(char *arg)
+{
+ local_apic_timer_disabled = 1;
+ return 0;
+}
+early_param("nolapic_timer", parse_disable_lapic_timer);
+
+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 int __init apic_set_verbosity(char *str)
+{
+ if (strcmp("debug", str) == 0)
+ apic_verbosity = APIC_DEBUG;
+ else if (strcmp("verbose", str) == 0)
+ apic_verbosity = APIC_VERBOSE;
+ return 1;
+}
+__setup("apic=", apic_set_verbosity);
+
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