/*
- * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
+ * Copyright (c) 2008-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <mach/mach_types.h>
#include <mach/kern_return.h>
-#include <kern/kern_types.h>
-#include <kern/cpu_number.h>
-#include <kern/cpu_data.h>
-#include <kern/assert.h>
-#include <kern/machine.h>
-
-#include <vm/vm_map.h>
-#include <vm/vm_kern.h>
-
#include <i386/lapic.h>
#include <i386/cpuid.h>
#include <i386/proc_reg.h>
#include <i386/machine_cpu.h>
#include <i386/misc_protos.h>
#include <i386/mp.h>
-#include <i386/mtrr.h>
#include <i386/postcode.h>
#include <i386/cpu_threads.h>
#include <i386/machine_routines.h>
-#if CONFIG_MCA
-#include <i386/machine_check.h>
-#endif
-
-#if CONFIG_COUNTERS
-#include <pmc/pmc.h>
-#endif
-
-#if MACH_KDB
-#include <machine/db_machdep.h>
-#endif
+#include <i386/tsc.h>
#include <sys/kdebug.h>
-#if MP_DEBUG
-#define PAUSE delay(1000000)
-#define DBG(x...) kprintf(x)
-#else
-#define DBG(x...)
-#define PAUSE
-#endif /* MP_DEBUG */
-
-/* Initialize lapic_id so cpu_number() works on non SMP systems */
-unsigned long lapic_id_initdata = 0;
-unsigned long lapic_id = (unsigned long)&lapic_id_initdata;
-vm_offset_t lapic_start;
-
-static i386_intr_func_t lapic_intr_func[LAPIC_FUNC_TABLE_SIZE];
-
-/* TRUE if local APIC was enabled by the OS not by the BIOS */
-static boolean_t lapic_os_enabled = FALSE;
-
-static boolean_t lapic_errors_masked = FALSE;
-static uint64_t lapic_last_master_error = 0;
-static uint64_t lapic_error_time_threshold = 0;
-static unsigned lapic_master_error_count = 0;
-static unsigned lapic_error_count_threshold = 5;
-static boolean_t lapic_dont_panic = FALSE;
-
-extern int debug_boot_arg;
-
/* Base vector for local APIC interrupt sources */
int lapic_interrupt_base = LAPIC_DEFAULT_INTERRUPT_BASE;
-int lapic_to_cpu[MAX_CPUS];
+int lapic_to_cpu[MAX_LAPICIDS];
int cpu_to_lapic[MAX_CPUS];
-static void
+void
lapic_cpu_map_init(void)
{
int i;
- for (i = 0; i < MAX_CPUS; i++) {
- lapic_to_cpu[i] = -1;
+ for (i = 0; i < MAX_CPUS; i++)
cpu_to_lapic[i] = -1;
- }
+ for (i = 0; i < MAX_LAPICIDS; i++)
+ lapic_to_cpu[i] = -1;
}
void
lapic_cpu_map(int apic_id, int cpu)
{
+ assert(apic_id < MAX_LAPICIDS);
+ assert(cpu < MAX_CPUS);
cpu_to_lapic[cpu] = apic_id;
lapic_to_cpu[apic_id] = cpu;
}
uint32_t
ml_get_cpuid(uint32_t lapic_index)
{
- if(lapic_index >= (uint32_t)MAX_CPUS)
+ if(lapic_index >= (uint32_t)MAX_LAPICIDS)
return 0xFFFFFFFF; /* Return -1 if cpu too big */
/* Return the cpu ID (or -1 if not configured) */
return (uint32_t)lapic_to_cpu[lapic_index];
}
-
-
-#ifdef MP_DEBUG
-static void
-lapic_cpu_map_dump(void)
-{
- int i;
-
- for (i = 0; i < MAX_CPUS; i++) {
- if (cpu_to_lapic[i] == -1)
- continue;
- kprintf("cpu_to_lapic[%d]: %d\n",
- i, cpu_to_lapic[i]);
- }
- for (i = 0; i < MAX_CPUS; i++) {
- if (lapic_to_cpu[i] == -1)
- continue;
- kprintf("lapic_to_cpu[%d]: %d\n",
- i, lapic_to_cpu[i]);
- }
-}
-#endif /* MP_DEBUG */
-
-void
-lapic_init(void)
-{
- int result;
- vm_map_entry_t entry;
- uint32_t lo;
- uint32_t hi;
- boolean_t is_boot_processor;
- boolean_t is_lapic_enabled;
- vm_offset_t lapic_base;
-
- /* Examine the local APIC state */
- rdmsr(MSR_IA32_APIC_BASE, lo, hi);
- is_boot_processor = (lo & MSR_IA32_APIC_BASE_BSP) != 0;
- is_lapic_enabled = (lo & MSR_IA32_APIC_BASE_ENABLE) != 0;
- lapic_base = (lo & MSR_IA32_APIC_BASE_BASE);
- kprintf("MSR_IA32_APIC_BASE %p %s %s\n", (void *) lapic_base,
- is_lapic_enabled ? "enabled" : "disabled",
- is_boot_processor ? "BSP" : "AP");
- if (!is_boot_processor || !is_lapic_enabled)
- panic("Unexpected local APIC state\n");
-
- /* Establish a map to the local apic */
- lapic_start = (vm_offset_t)vm_map_min(kernel_map);
- result = vm_map_find_space(kernel_map,
- (vm_map_address_t *) &lapic_start,
- round_page(LAPIC_SIZE), 0,
- VM_MAKE_TAG(VM_MEMORY_IOKIT), &entry);
- if (result != KERN_SUCCESS) {
- panic("smp_init: vm_map_find_entry FAILED (err=%d)", result);
- }
- vm_map_unlock(kernel_map);
-/* Map in the local APIC non-cacheable, as recommended by Intel
- * in section 8.4.1 of the "System Programming Guide".
- */
- pmap_enter(pmap_kernel(),
- lapic_start,
- (ppnum_t) i386_btop(lapic_base),
- VM_PROT_READ|VM_PROT_WRITE,
- VM_WIMG_IO,
- TRUE);
- lapic_id = (unsigned long)(lapic_start + LAPIC_ID);
-
- if ((LAPIC_READ(VERSION)&LAPIC_VERSION_MASK) < 0x14) {
- panic("Local APIC version 0x%x, 0x14 or more expected\n",
- (LAPIC_READ(VERSION)&LAPIC_VERSION_MASK));
- }
-
- /* Set up the lapic_id <-> cpu_number map and add this boot processor */
- lapic_cpu_map_init();
- lapic_cpu_map((LAPIC_READ(ID)>>LAPIC_ID_SHIFT)&LAPIC_ID_MASK, 0);
- kprintf("Boot cpu local APIC id 0x%x\n", cpu_to_lapic[0]);
-}
-
-
-static int
-lapic_esr_read(void)
-{
- /* write-read register */
- LAPIC_WRITE(ERROR_STATUS, 0);
- return LAPIC_READ(ERROR_STATUS);
-}
-
-static void
-lapic_esr_clear(void)
-{
- LAPIC_WRITE(ERROR_STATUS, 0);
- LAPIC_WRITE(ERROR_STATUS, 0);
-}
-
-static const char *DM_str[8] = {
- "Fixed",
- "Lowest Priority",
- "Invalid",
- "Invalid",
- "NMI",
- "Reset",
- "Invalid",
- "ExtINT"};
-
-void
-lapic_dump(void)
-{
- int i;
-
-#define BOOL(a) ((a)?' ':'!')
-#define VEC(lvt) \
- LAPIC_READ(lvt)&LAPIC_LVT_VECTOR_MASK
-#define DS(lvt) \
- (LAPIC_READ(lvt)&LAPIC_LVT_DS_PENDING)?" SendPending" : "Idle"
-#define DM(lvt) \
- DM_str[(LAPIC_READ(lvt)>>LAPIC_LVT_DM_SHIFT)&LAPIC_LVT_DM_MASK]
-#define MASK(lvt) \
- BOOL(LAPIC_READ(lvt)&LAPIC_LVT_MASKED)
-#define TM(lvt) \
- (LAPIC_READ(lvt)&LAPIC_LVT_TM_LEVEL)? "Level" : "Edge"
-#define IP(lvt) \
- (LAPIC_READ(lvt)&LAPIC_LVT_IP_PLRITY_LOW)? "Low " : "High"
-
- kprintf("LAPIC %d at %p version 0x%x\n",
- (LAPIC_READ(ID)>>LAPIC_ID_SHIFT)&LAPIC_ID_MASK,
- (void *) lapic_start,
- LAPIC_READ(VERSION)&LAPIC_VERSION_MASK);
- kprintf("Priorities: Task 0x%x Arbitration 0x%x Processor 0x%x\n",
- LAPIC_READ(TPR)&LAPIC_TPR_MASK,
- LAPIC_READ(APR)&LAPIC_APR_MASK,
- LAPIC_READ(PPR)&LAPIC_PPR_MASK);
- kprintf("Destination Format 0x%x Logical Destination 0x%x\n",
- LAPIC_READ(DFR)>>LAPIC_DFR_SHIFT,
- LAPIC_READ(LDR)>>LAPIC_LDR_SHIFT);
- kprintf("%cEnabled %cFocusChecking SV 0x%x\n",
- BOOL(LAPIC_READ(SVR)&LAPIC_SVR_ENABLE),
- BOOL(!(LAPIC_READ(SVR)&LAPIC_SVR_FOCUS_OFF)),
- LAPIC_READ(SVR) & LAPIC_SVR_MASK);
-#if CONFIG_MCA
- if (mca_is_cmci_present())
- kprintf("LVT_CMCI: Vector 0x%02x [%s] %s %cmasked\n",
- VEC(LVT_CMCI),
- DM(LVT_CMCI),
- DS(LVT_CMCI),
- MASK(LVT_CMCI));
-#endif
- kprintf("LVT_TIMER: Vector 0x%02x %s %cmasked %s\n",
- VEC(LVT_TIMER),
- DS(LVT_TIMER),
- MASK(LVT_TIMER),
- (LAPIC_READ(LVT_TIMER)&LAPIC_LVT_PERIODIC)?"Periodic":"OneShot");
- kprintf(" Initial Count: 0x%08x \n", LAPIC_READ(TIMER_INITIAL_COUNT));
- kprintf(" Current Count: 0x%08x \n", LAPIC_READ(TIMER_CURRENT_COUNT));
- kprintf(" Divide Config: 0x%08x \n", LAPIC_READ(TIMER_DIVIDE_CONFIG));
- kprintf("LVT_PERFCNT: Vector 0x%02x [%s] %s %cmasked\n",
- VEC(LVT_PERFCNT),
- DM(LVT_PERFCNT),
- DS(LVT_PERFCNT),
- MASK(LVT_PERFCNT));
- kprintf("LVT_THERMAL: Vector 0x%02x [%s] %s %cmasked\n",
- VEC(LVT_THERMAL),
- DM(LVT_THERMAL),
- DS(LVT_THERMAL),
- MASK(LVT_THERMAL));
- kprintf("LVT_LINT0: Vector 0x%02x [%s][%s][%s] %s %cmasked\n",
- VEC(LVT_LINT0),
- DM(LVT_LINT0),
- TM(LVT_LINT0),
- IP(LVT_LINT0),
- DS(LVT_LINT0),
- MASK(LVT_LINT0));
- kprintf("LVT_LINT1: Vector 0x%02x [%s][%s][%s] %s %cmasked\n",
- VEC(LVT_LINT1),
- DM(LVT_LINT1),
- TM(LVT_LINT1),
- IP(LVT_LINT1),
- DS(LVT_LINT1),
- MASK(LVT_LINT1));
- kprintf("LVT_ERROR: Vector 0x%02x %s %cmasked\n",
- VEC(LVT_ERROR),
- DS(LVT_ERROR),
- MASK(LVT_ERROR));
- kprintf("ESR: %08x \n", lapic_esr_read());
- kprintf(" ");
- for(i=0xf; i>=0; i--)
- kprintf("%x%x%x%x",i,i,i,i);
- kprintf("\n");
- kprintf("TMR: 0x");
- for(i=7; i>=0; i--)
- kprintf("%08x",LAPIC_READ_OFFSET(TMR_BASE, i*0x10));
- kprintf("\n");
- kprintf("IRR: 0x");
- for(i=7; i>=0; i--)
- kprintf("%08x",LAPIC_READ_OFFSET(IRR_BASE, i*0x10));
- kprintf("\n");
- kprintf("ISR: 0x");
- for(i=7; i >= 0; i--)
- kprintf("%08x",LAPIC_READ_OFFSET(ISR_BASE, i*0x10));
- kprintf("\n");
-}
-
-#if MACH_KDB
-/*
- * Displays apic junk
- *
- * da
- */
-void
-db_apic(__unused db_expr_t addr,
- __unused int have_addr,
- __unused db_expr_t count,
- __unused char *modif)
-{
-
- lapic_dump();
-
- return;
-}
-
-#endif
-
-boolean_t
-lapic_probe(void)
-{
- uint32_t lo;
- uint32_t hi;
-
- if (cpuid_features() & CPUID_FEATURE_APIC)
- return TRUE;
-
- if (cpuid_family() == 6 || cpuid_family() == 15) {
- /*
- * Mobile Pentiums:
- * There may be a local APIC which wasn't enabled by BIOS.
- * So we try to enable it explicitly.
- */
- rdmsr(MSR_IA32_APIC_BASE, lo, hi);
- lo &= ~MSR_IA32_APIC_BASE_BASE;
- lo |= MSR_IA32_APIC_BASE_ENABLE | LAPIC_START;
- lo |= MSR_IA32_APIC_BASE_ENABLE;
- wrmsr(MSR_IA32_APIC_BASE, lo, hi);
-
- /*
- * Re-initialize cpu features info and re-check.
- */
- cpuid_set_info();
- if (cpuid_features() & CPUID_FEATURE_APIC) {
- printf("Local APIC discovered and enabled\n");
- lapic_os_enabled = TRUE;
- lapic_interrupt_base = LAPIC_REDUCED_INTERRUPT_BASE;
- return TRUE;
- }
- }
-
- return FALSE;
-}
-
-void
-lapic_shutdown(void)
-{
- uint32_t lo;
- uint32_t hi;
- uint32_t value;
-
- /* Shutdown if local APIC was enabled by OS */
- if (lapic_os_enabled == FALSE)
- return;
-
- mp_disable_preemption();
-
- /* ExtINT: masked */
- if (get_cpu_number() == master_cpu) {
- value = LAPIC_READ(LVT_LINT0);
- value |= LAPIC_LVT_MASKED;
- LAPIC_WRITE(LVT_LINT0, value);
- }
-
- /* Error: masked */
- LAPIC_WRITE(LVT_ERROR, LAPIC_READ(LVT_ERROR) | LAPIC_LVT_MASKED);
-
- /* Timer: masked */
- LAPIC_WRITE(LVT_TIMER, LAPIC_READ(LVT_TIMER) | LAPIC_LVT_MASKED);
-
- /* Perfmon: masked */
- LAPIC_WRITE(LVT_PERFCNT, LAPIC_READ(LVT_PERFCNT) | LAPIC_LVT_MASKED);
-
- /* APIC software disabled */
- LAPIC_WRITE(SVR, LAPIC_READ(SVR) & ~LAPIC_SVR_ENABLE);
-
- /* Bypass the APIC completely and update cpu features */
- rdmsr(MSR_IA32_APIC_BASE, lo, hi);
- lo &= ~MSR_IA32_APIC_BASE_ENABLE;
- wrmsr(MSR_IA32_APIC_BASE, lo, hi);
- cpuid_set_info();
-
- mp_enable_preemption();
-}
-
-void
-lapic_configure(void)
-{
- int value;
-
- if (lapic_error_time_threshold == 0 && cpu_number() == 0) {
- nanoseconds_to_absolutetime(NSEC_PER_SEC >> 2, &lapic_error_time_threshold);
- if (!PE_parse_boot_argn("lapic_dont_panic", &lapic_dont_panic, sizeof(lapic_dont_panic))) {
- lapic_dont_panic = FALSE;
- }
- }
-
- /* Set flat delivery model, logical processor id */
- LAPIC_WRITE(DFR, LAPIC_DFR_FLAT);
- LAPIC_WRITE(LDR, (get_cpu_number()) << LAPIC_LDR_SHIFT);
-
- /* Accept all */
- LAPIC_WRITE(TPR, 0);
-
- LAPIC_WRITE(SVR, LAPIC_VECTOR(SPURIOUS) | LAPIC_SVR_ENABLE);
-
- /* ExtINT */
- if (get_cpu_number() == master_cpu) {
- value = LAPIC_READ(LVT_LINT0);
- value &= ~LAPIC_LVT_MASKED;
- value |= LAPIC_LVT_DM_EXTINT;
- LAPIC_WRITE(LVT_LINT0, value);
- }
-
- /* Timer: unmasked, one-shot */
- LAPIC_WRITE(LVT_TIMER, LAPIC_VECTOR(TIMER));
-
- /* Perfmon: unmasked */
- LAPIC_WRITE(LVT_PERFCNT, LAPIC_VECTOR(PERFCNT));
-
- /* Thermal: unmasked */
- LAPIC_WRITE(LVT_THERMAL, LAPIC_VECTOR(THERMAL));
-
-#if CONFIG_MCA
- /* CMCI, if available */
- if (mca_is_cmci_present())
- LAPIC_WRITE(LVT_CMCI, LAPIC_VECTOR(CMCI));
-#endif
-
- if (((cpu_number() == master_cpu) && lapic_errors_masked == FALSE) ||
- (cpu_number() != master_cpu)) {
- lapic_esr_clear();
- LAPIC_WRITE(LVT_ERROR, LAPIC_VECTOR(ERROR));
- }
-}
-
-void
-lapic_set_timer(
- boolean_t interrupt_unmasked,
- lapic_timer_mode_t mode,
- lapic_timer_divide_t divisor,
- lapic_timer_count_t initial_count)
-{
- boolean_t state;
- uint32_t timer_vector;
-
- state = ml_set_interrupts_enabled(FALSE);
- timer_vector = LAPIC_READ(LVT_TIMER);
- timer_vector &= ~(LAPIC_LVT_MASKED|LAPIC_LVT_PERIODIC);;
- timer_vector |= interrupt_unmasked ? 0 : LAPIC_LVT_MASKED;
- timer_vector |= (mode == periodic) ? LAPIC_LVT_PERIODIC : 0;
- LAPIC_WRITE(LVT_TIMER, timer_vector);
- LAPIC_WRITE(TIMER_DIVIDE_CONFIG, divisor);
- LAPIC_WRITE(TIMER_INITIAL_COUNT, initial_count);
- ml_set_interrupts_enabled(state);
-}
-
-void
-lapic_get_timer(
- lapic_timer_mode_t *mode,
- lapic_timer_divide_t *divisor,
- lapic_timer_count_t *initial_count,
- lapic_timer_count_t *current_count)
-{
- boolean_t state;
-
- state = ml_set_interrupts_enabled(FALSE);
- if (mode)
- *mode = (LAPIC_READ(LVT_TIMER) & LAPIC_LVT_PERIODIC) ?
- periodic : one_shot;
- if (divisor)
- *divisor = LAPIC_READ(TIMER_DIVIDE_CONFIG) & LAPIC_TIMER_DIVIDE_MASK;
- if (initial_count)
- *initial_count = LAPIC_READ(TIMER_INITIAL_COUNT);
- if (current_count)
- *current_count = LAPIC_READ(TIMER_CURRENT_COUNT);
- ml_set_interrupts_enabled(state);
-}
-
-static inline void
-_lapic_end_of_interrupt(void)
-{
- LAPIC_WRITE(EOI, 0);
-}
-
-void
-lapic_end_of_interrupt(void)
-{
- _lapic_end_of_interrupt();
-}
-
-void lapic_unmask_perfcnt_interrupt(void) {
- LAPIC_WRITE(LVT_PERFCNT, LAPIC_VECTOR(PERFCNT));
-}
-
-void
-lapic_set_intr_func(int vector, i386_intr_func_t func)
-{
- if (vector > lapic_interrupt_base)
- vector -= lapic_interrupt_base;
-
- switch (vector) {
- case LAPIC_NMI_INTERRUPT:
- case LAPIC_INTERPROCESSOR_INTERRUPT:
- case LAPIC_TIMER_INTERRUPT:
- case LAPIC_THERMAL_INTERRUPT:
- case LAPIC_PERFCNT_INTERRUPT:
- case LAPIC_CMCI_INTERRUPT:
- case LAPIC_PM_INTERRUPT:
- lapic_intr_func[vector] = func;
- break;
- default:
- panic("lapic_set_intr_func(%d,%p) invalid vector\n",
- vector, func);
- }
-}
-
-int
-lapic_interrupt(int interrupt_num, x86_saved_state_t *state)
-{
- int retval = 0;
- int esr = -1;
-
- interrupt_num -= lapic_interrupt_base;
- if (interrupt_num < 0) {
- if (interrupt_num == (LAPIC_NMI_INTERRUPT - lapic_interrupt_base) &&
- lapic_intr_func[LAPIC_NMI_INTERRUPT] != NULL) {
- retval = (*lapic_intr_func[LAPIC_NMI_INTERRUPT])(state);
- _lapic_end_of_interrupt();
- return retval;
- }
- else
- return 0;
- }
-
- switch(interrupt_num) {
- case LAPIC_TIMER_INTERRUPT:
- case LAPIC_THERMAL_INTERRUPT:
- case LAPIC_INTERPROCESSOR_INTERRUPT:
- case LAPIC_PM_INTERRUPT:
- if (lapic_intr_func[interrupt_num] != NULL)
- (void) (*lapic_intr_func[interrupt_num])(state);
- _lapic_end_of_interrupt();
- retval = 1;
- break;
- case LAPIC_PERFCNT_INTERRUPT:
- /* If a function has been registered, invoke it. Otherwise,
- * pass up to IOKit.
- */
- if (lapic_intr_func[interrupt_num] != NULL) {
- (void) (*lapic_intr_func[interrupt_num])(state);
- /* Unmask the interrupt since we don't expect legacy users
- * to be responsible for it.
- */
- lapic_unmask_perfcnt_interrupt();
- _lapic_end_of_interrupt();
- retval = 1;
- }
- break;
- case LAPIC_CMCI_INTERRUPT:
- if (lapic_intr_func[interrupt_num] != NULL)
- (void) (*lapic_intr_func[interrupt_num])(state);
- /* return 0 for plaform expert to handle */
- break;
- case LAPIC_ERROR_INTERRUPT:
- /* We treat error interrupts on APs as fatal.
- * The current interrupt steering scheme directs most
- * external interrupts to the BSP (HPET interrupts being
- * a notable exception); hence, such an error
- * on an AP may signify LVT corruption (with "may" being
- * the operative word). On the BSP, we adopt a more
- * lenient approach, in the interests of enhancing
- * debuggability and reducing fragility.
- * If "lapic_error_count_threshold" error interrupts
- * occur within "lapic_error_time_threshold" absolute
- * time units, we mask the error vector and log. The
- * error interrupts themselves are likely
- * side effects of issues which are beyond the purview of
- * the local APIC interrupt handler, however. The Error
- * Status Register value (the illegal destination
- * vector code is one observed in practice) indicates
- * the immediate cause of the error.
- */
- esr = lapic_esr_read();
- lapic_dump();
-
- if ((debug_boot_arg && (lapic_dont_panic == FALSE)) ||
- cpu_number() != master_cpu) {
- panic("Local APIC error, ESR: %d\n", esr);
- }
-
- if (cpu_number() == master_cpu) {
- uint64_t abstime = mach_absolute_time();
- if ((abstime - lapic_last_master_error) < lapic_error_time_threshold) {
- if (lapic_master_error_count++ > lapic_error_count_threshold) {
- lapic_errors_masked = TRUE;
- LAPIC_WRITE(LVT_ERROR, LAPIC_READ(LVT_ERROR) | LAPIC_LVT_MASKED);
- printf("Local APIC: errors masked\n");
- }
- }
- else {
- lapic_last_master_error = abstime;
- lapic_master_error_count = 0;
- }
- printf("Local APIC error on master CPU, ESR: %d, error count this run: %d\n", esr, lapic_master_error_count);
- }
-
- _lapic_end_of_interrupt();
- retval = 1;
- break;
- case LAPIC_SPURIOUS_INTERRUPT:
- kprintf("SPIV\n");
- /* No EOI required here */
- retval = 1;
- break;
- case LAPIC_PMC_SW_INTERRUPT:
- {
-#if CONFIG_COUNTERS
- thread_t old, new;
- ml_get_csw_threads(&old, &new);
-
- if (pmc_context_switch(old, new) == TRUE) {
- retval = 1;
- /* No EOI required for SWI */
- }
-#endif /* CONFIG_COUNTERS */
- }
- break;
- }
-
- return retval;
-}
-
-void
-lapic_smm_restore(void)
-{
- boolean_t state;
-
- if (lapic_os_enabled == FALSE)
- return;
-
- state = ml_set_interrupts_enabled(FALSE);
-
- if (LAPIC_ISR_IS_SET(LAPIC_REDUCED_INTERRUPT_BASE, TIMER)) {
- /*
- * Bogus SMI handler enables interrupts but does not know about
- * local APIC interrupt sources. When APIC timer counts down to
- * zero while in SMM, local APIC will end up waiting for an EOI
- * but no interrupt was delivered to the OS.
- */
- _lapic_end_of_interrupt();
-
- /*
- * timer is one-shot, trigger another quick countdown to trigger
- * another timer interrupt.
- */
- if (LAPIC_READ(TIMER_CURRENT_COUNT) == 0) {
- LAPIC_WRITE(TIMER_INITIAL_COUNT, 1);
- }
-
- kprintf("lapic_smm_restore\n");
- }
-
- ml_set_interrupts_enabled(state);
-}
-
-void
-lapic_send_ipi(int cpu, int vector)
-{
- boolean_t state;
-
- if (vector < lapic_interrupt_base)
- vector += lapic_interrupt_base;
-
- state = ml_set_interrupts_enabled(FALSE);
-
- /* Wait for pending outgoing send to complete */
- while (LAPIC_READ(ICR) & LAPIC_ICR_DS_PENDING) {
- cpu_pause();
- }
-
- LAPIC_WRITE(ICRD, cpu_to_lapic[cpu] << LAPIC_ICRD_DEST_SHIFT);
- LAPIC_WRITE(ICR, vector | LAPIC_ICR_DM_FIXED);
-
- (void) ml_set_interrupts_enabled(state);
-}
projects / apple / xnu.git / blobdiff