FreeBSD/Linux Kernel Cross Reference
sys/i386/include/apicvar.h

     /*-
      * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_APICVAR_H_
    #define _MACHINE_APICVAR_H_
    
    /*
     * Local && I/O APIC variable definitions.
     */
    
    /*
     * Layout of local APIC interrupt vectors:
     *
     *      0xff (255)  +-------------+
     *                  |             | 15 (Spurious / IPIs / Local Interrupts)
     *      0xf0 (240)  +-------------+
     *                  |             | 14 (I/O Interrupts / Timer)
     *      0xe0 (224)  +-------------+
     *                  |             | 13 (I/O Interrupts)
     *      0xd0 (208)  +-------------+
     *                  |             | 12 (I/O Interrupts)
     *      0xc0 (192)  +-------------+
     *                  |             | 11 (I/O Interrupts)
     *      0xb0 (176)  +-------------+
     *                  |             | 10 (I/O Interrupts)
     *      0xa0 (160)  +-------------+
     *                  |             | 9 (I/O Interrupts)
     *      0x90 (144)  +-------------+
     *                  |             | 8 (I/O Interrupts / System Calls)
     *      0x80 (128)  +-------------+
     *                  |             | 7 (I/O Interrupts)
     *      0x70 (112)  +-------------+
     *                  |             | 6 (I/O Interrupts)
     *      0x60 (96)   +-------------+
     *                  |             | 5 (I/O Interrupts)
     *      0x50 (80)   +-------------+
     *                  |             | 4 (I/O Interrupts)
     *      0x40 (64)   +-------------+
     *                  |             | 3 (I/O Interrupts)
     *      0x30 (48)   +-------------+
     *                  |             | 2 (ATPIC Interrupts)
     *      0x20 (32)   +-------------+
     *                  |             | 1 (Exceptions, traps, faults, etc.)
     *      0x10 (16)   +-------------+
     *                  |             | 0 (Exceptions, traps, faults, etc.)
     *      0x00 (0)    +-------------+
     *
     * Note: 0x80 needs to be handled specially and not allocated to an
     * I/O device!
     */
    
    #define MAX_APIC_ID     0xfe
    #define APIC_ID_ALL     0xff
    
    /* I/O Interrupts are used for external devices such as ISA, PCI, etc. */
    #define APIC_IO_INTS    (IDT_IO_INTS + 16)
    #define APIC_NUM_IOINTS 191
    
    /* The timer interrupt is used for clock handling and drives hardclock, etc. */
    #define APIC_TIMER_INT  (APIC_IO_INTS + APIC_NUM_IOINTS)
    
    /*  
     ********************* !!! WARNING !!! ******************************
     * Each local apic has an interrupt receive fifo that is two entries deep
     * for each interrupt priority class (higher 4 bits of interrupt vector).
     * Once the fifo is full the APIC can no longer receive interrupts for this
     * class and sending IPIs from other CPUs will be blocked.
     * To avoid deadlocks there should be no more than two IPI interrupts
     * pending at the same time.
     * Currently this is guaranteed by dividing the IPIs in two groups that have 
     * each at most one IPI interrupt pending. The first group is protected by the
     * smp_ipi_mtx and waits for the completion of the IPI (Only one IPI user 
     * at a time) The second group uses a single interrupt and a bitmap to avoid
     * redundant IPI interrupts.
    */ 
   
   /* Interrupts for local APIC LVT entries other than the timer. */
   #define APIC_LOCAL_INTS 240
   #define APIC_ERROR_INT  APIC_LOCAL_INTS
   #define APIC_THERMAL_INT (APIC_LOCAL_INTS + 1)
   #define APIC_CMC_INT    (APIC_LOCAL_INTS + 2)
   #define APIC_IPI_INTS   (APIC_LOCAL_INTS + 3)
   
   #define IPI_RENDEZVOUS  (APIC_IPI_INTS)         /* Inter-CPU rendezvous. */
   #define IPI_INVLTLB     (APIC_IPI_INTS + 1)     /* TLB Shootdown IPIs */
   #define IPI_INVLPG      (APIC_IPI_INTS + 2)
   #define IPI_INVLRNG     (APIC_IPI_INTS + 3)
   #define IPI_INVLCACHE   (APIC_IPI_INTS + 4)
   #define IPI_LAZYPMAP    (APIC_IPI_INTS + 5)     /* Lazy pmap release. */
   /* Vector to handle bitmap based IPIs */
   #define IPI_BITMAP_VECTOR       (APIC_IPI_INTS + 6) 
   
   /* IPIs handled by IPI_BITMAPED_VECTOR  (XXX ups is there a better place?) */
   #define IPI_AST         0       /* Generate software trap. */
   #define IPI_PREEMPT     1
   #define IPI_HARDCLOCK   2 
   #define IPI_BITMAP_LAST IPI_HARDCLOCK
   #define IPI_IS_BITMAPED(x) ((x) <= IPI_BITMAP_LAST)
   
   #define IPI_STOP        (APIC_IPI_INTS + 7)     /* Stop CPU until restarted. */
   #define IPI_SUSPEND     (APIC_IPI_INTS + 8)     /* Suspend CPU until restarted. */
   #define IPI_STOP_HARD   (APIC_IPI_INTS + 9)     /* Stop CPU with a NMI. */
   
   /*
    * The spurious interrupt can share the priority class with the IPIs since
    * it is not a normal interrupt. (Does not use the APIC's interrupt fifo)
    */
   #define APIC_SPURIOUS_INT 255
   
   #ifndef LOCORE
   
   #define APIC_IPI_DEST_SELF      -1
   #define APIC_IPI_DEST_ALL       -2
   #define APIC_IPI_DEST_OTHERS    -3
   
   #define APIC_BUS_UNKNOWN        -1
   #define APIC_BUS_ISA            0
   #define APIC_BUS_EISA           1
   #define APIC_BUS_PCI            2
   #define APIC_BUS_MAX            APIC_BUS_PCI
   
   /*
    * An APIC enumerator is a psuedo bus driver that enumerates APIC's including
    * CPU's and I/O APIC's.
    */
   struct apic_enumerator {
           const char *apic_name;
           int (*apic_probe)(void);
           int (*apic_probe_cpus)(void);
           int (*apic_setup_local)(void);
           int (*apic_setup_io)(void);
           SLIST_ENTRY(apic_enumerator) apic_next;
   };
   
   inthand_t
           IDTVEC(apic_isr1), IDTVEC(apic_isr2), IDTVEC(apic_isr3),
           IDTVEC(apic_isr4), IDTVEC(apic_isr5), IDTVEC(apic_isr6),
           IDTVEC(apic_isr7), IDTVEC(cmcint), IDTVEC(errorint),
           IDTVEC(spuriousint), IDTVEC(timerint);
   
   extern vm_paddr_t lapic_paddr;
   extern int apic_cpuids[];
   
   u_int   apic_alloc_vector(u_int apic_id, u_int irq);
   u_int   apic_alloc_vectors(u_int apic_id, u_int *irqs, u_int count,
               u_int align);
   void    apic_disable_vector(u_int apic_id, u_int vector);
   void    apic_enable_vector(u_int apic_id, u_int vector);
   void    apic_free_vector(u_int apic_id, u_int vector, u_int irq);
   u_int   apic_idt_to_irq(u_int apic_id, u_int vector);
   void    apic_register_enumerator(struct apic_enumerator *enumerator);
   u_int   apic_cpuid(u_int apic_id);
   void    *ioapic_create(vm_paddr_t addr, int32_t apic_id, int intbase);
   int     ioapic_disable_pin(void *cookie, u_int pin);
   int     ioapic_get_vector(void *cookie, u_int pin);
   void    ioapic_register(void *cookie);
   int     ioapic_remap_vector(void *cookie, u_int pin, int vector);
   int     ioapic_set_bus(void *cookie, u_int pin, int bus_type);
   int     ioapic_set_extint(void *cookie, u_int pin);
   int     ioapic_set_nmi(void *cookie, u_int pin);
   int     ioapic_set_polarity(void *cookie, u_int pin, enum intr_polarity pol);
   int     ioapic_set_triggermode(void *cookie, u_int pin,
               enum intr_trigger trigger);
   int     ioapic_set_smi(void *cookie, u_int pin);
   void    lapic_create(u_int apic_id, int boot_cpu);
   void    lapic_disable(void);
   void    lapic_disable_pmc(void);
   void    lapic_dump(const char *str);
   void    lapic_enable_cmc(void);
   int     lapic_enable_pmc(void);
   void    lapic_eoi(void);
   int     lapic_id(void);
   void    lapic_init(vm_paddr_t addr);
   int     lapic_intr_pending(u_int vector);
   void    lapic_ipi_raw(register_t icrlo, u_int dest);
   void    lapic_ipi_vectored(u_int vector, int dest);
   int     lapic_ipi_wait(int delay);
   void    lapic_handle_cmc(void);
   void    lapic_handle_error(void);
   void    lapic_handle_intr(int vector, struct trapframe *frame);
   void    lapic_handle_timer(struct trapframe *frame);
   void    lapic_reenable_pmc(void);
   void    lapic_set_logical_id(u_int apic_id, u_int cluster, u_int cluster_id);
   int     lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked);
   int     lapic_set_lvt_mode(u_int apic_id, u_int lvt, u_int32_t mode);
   int     lapic_set_lvt_polarity(u_int apic_id, u_int lvt,
               enum intr_polarity pol);
   int     lapic_set_lvt_triggermode(u_int apic_id, u_int lvt,
               enum intr_trigger trigger);
   void    lapic_set_tpr(u_int vector);
   void    lapic_setup(int boot);
   void    xen_intr_handle_upcall(struct trapframe *frame);
   
   #endif /* !LOCORE */
   #endif /* _MACHINE_APICVAR_H_ */

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