The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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

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    1 /*-
    2  * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _MACHINE_APICVAR_H_
   30 #define _MACHINE_APICVAR_H_
   31 
   32 /*
   33  * Local && I/O APIC variable definitions.
   34  */
   35 
   36 /*
   37  * Layout of local APIC interrupt vectors:
   38  *
   39  *      0xff (255)  +-------------+
   40  *                  |             | 15 (Spurious / IPIs / Local Interrupts)
   41  *      0xf0 (240)  +-------------+
   42  *                  |             | 14 (I/O Interrupts / Timer)
   43  *      0xe0 (224)  +-------------+
   44  *                  |             | 13 (I/O Interrupts)
   45  *      0xd0 (208)  +-------------+
   46  *                  |             | 12 (I/O Interrupts)
   47  *      0xc0 (192)  +-------------+
   48  *                  |             | 11 (I/O Interrupts)
   49  *      0xb0 (176)  +-------------+
   50  *                  |             | 10 (I/O Interrupts)
   51  *      0xa0 (160)  +-------------+
   52  *                  |             | 9 (I/O Interrupts)
   53  *      0x90 (144)  +-------------+
   54  *                  |             | 8 (I/O Interrupts / System Calls)
   55  *      0x80 (128)  +-------------+
   56  *                  |             | 7 (I/O Interrupts)
   57  *      0x70 (112)  +-------------+
   58  *                  |             | 6 (I/O Interrupts)
   59  *      0x60 (96)   +-------------+
   60  *                  |             | 5 (I/O Interrupts)
   61  *      0x50 (80)   +-------------+
   62  *                  |             | 4 (I/O Interrupts)
   63  *      0x40 (64)   +-------------+
   64  *                  |             | 3 (I/O Interrupts)
   65  *      0x30 (48)   +-------------+
   66  *                  |             | 2 (ATPIC Interrupts)
   67  *      0x20 (32)   +-------------+
   68  *                  |             | 1 (Exceptions, traps, faults, etc.)
   69  *      0x10 (16)   +-------------+
   70  *                  |             | 0 (Exceptions, traps, faults, etc.)
   71  *      0x00 (0)    +-------------+
   72  *
   73  * Note: 0x80 needs to be handled specially and not allocated to an
   74  * I/O device!
   75  */
   76 
   77 #define MAX_APIC_ID     0xfe
   78 #define APIC_ID_ALL     0xff
   79 
   80 /* I/O Interrupts are used for external devices such as ISA, PCI, etc. */
   81 #define APIC_IO_INTS    (IDT_IO_INTS + 16)
   82 #define APIC_NUM_IOINTS 191
   83 
   84 /* The timer interrupt is used for clock handling and drives hardclock, etc. */
   85 #define APIC_TIMER_INT  (APIC_IO_INTS + APIC_NUM_IOINTS)
   86 
   87 /*  
   88  ********************* !!! WARNING !!! ******************************
   89  * Each local apic has an interrupt receive fifo that is two entries deep
   90  * for each interrupt priority class (higher 4 bits of interrupt vector).
   91  * Once the fifo is full the APIC can no longer receive interrupts for this
   92  * class and sending IPIs from other CPUs will be blocked.
   93  * To avoid deadlocks there should be no more than two IPI interrupts
   94  * pending at the same time.
   95  * Currently this is guaranteed by dividing the IPIs in two groups that have 
   96  * each at most one IPI interrupt pending. The first group is protected by the
   97  * smp_ipi_mtx and waits for the completion of the IPI (Only one IPI user 
   98  * at a time) The second group uses a single interrupt and a bitmap to avoid
   99  * redundant IPI interrupts.
  100  */ 
  101 
  102 /* Interrupts for local APIC LVT entries other than the timer. */
  103 #ifdef XEN
  104 /* These are the Xen i386 APIC definitions */
  105 #define APIC_LOCAL_INTS 240
  106 #define APIC_ERROR_INT  APIC_LOCAL_INTS
  107 #define APIC_THERMAL_INT (APIC_LOCAL_INTS + 1)
  108 #define APIC_CMC_INT    (APIC_LOCAL_INTS + 2)
  109 #define APIC_IPI_INTS   (APIC_LOCAL_INTS + 3)
  110 
  111 #define IPI_RENDEZVOUS          (APIC_IPI_INTS) /* Inter-CPU rendezvous. */
  112 #define IPI_INVLTLB             (APIC_IPI_INTS + 1)     /* TLB Shootdown IPIs */
  113 #define IPI_INVLPG              (APIC_IPI_INTS + 2)
  114 #define IPI_INVLRNG             (APIC_IPI_INTS + 3)
  115 #define IPI_INVLCACHE           (APIC_IPI_INTS + 4)
  116 #define IPI_LAZYPMAP            (APIC_IPI_INTS + 5)     /* Lazy pmap release. */
  117 /* Vector to handle bitmap based IPIs */
  118 #define IPI_BITMAP_VECTOR       (APIC_IPI_INTS + 6)
  119 
  120 /* IPIs handled by IPI_BITMAPED_VECTOR  (XXX ups is there a better place?) */
  121 #define IPI_AST         0       /* Generate software trap. */
  122 #define IPI_PREEMPT     1
  123 #define IPI_HARDCLOCK   2 
  124 #define IPI_BITMAP_LAST IPI_HARDCLOCK
  125 #define IPI_IS_BITMAPED(x) ((x) <= IPI_BITMAP_LAST)
  126 
  127 #define IPI_STOP        (APIC_IPI_INTS + 7)     /* Stop CPU until restarted. */
  128 #define IPI_SUSPEND     (APIC_IPI_INTS + 8)     /* Suspend CPU until restarted. */
  129 #define IPI_STOP_HARD   (APIC_IPI_INTS + 9)     /* Stop CPU with a NMI. */
  130 
  131 #else /* XEN */
  132 /* These are the normal i386 APIC definitions */
  133 #define APIC_LOCAL_INTS 240
  134 #define APIC_ERROR_INT  APIC_LOCAL_INTS
  135 #define APIC_THERMAL_INT (APIC_LOCAL_INTS + 1)
  136 #define APIC_CMC_INT    (APIC_LOCAL_INTS + 2)
  137 #define APIC_IPI_INTS   (APIC_LOCAL_INTS + 3)
  138 
  139 #define IPI_RENDEZVOUS  (APIC_IPI_INTS)         /* Inter-CPU rendezvous. */
  140 #define IPI_INVLTLB     (APIC_IPI_INTS + 1)     /* TLB Shootdown IPIs */
  141 #define IPI_INVLPG      (APIC_IPI_INTS + 2)
  142 #define IPI_INVLRNG     (APIC_IPI_INTS + 3)
  143 #define IPI_INVLCACHE   (APIC_IPI_INTS + 4)
  144 #define IPI_LAZYPMAP    (APIC_IPI_INTS + 5)     /* Lazy pmap release. */
  145 /* Vector to handle bitmap based IPIs */
  146 #define IPI_BITMAP_VECTOR       (APIC_IPI_INTS + 6) 
  147 
  148 /* IPIs handled by IPI_BITMAPED_VECTOR  (XXX ups is there a better place?) */
  149 #define IPI_AST         0       /* Generate software trap. */
  150 #define IPI_PREEMPT     1
  151 #define IPI_HARDCLOCK   2 
  152 #define IPI_BITMAP_LAST IPI_HARDCLOCK
  153 #define IPI_IS_BITMAPED(x) ((x) <= IPI_BITMAP_LAST)
  154 
  155 #define IPI_STOP        (APIC_IPI_INTS + 7)     /* Stop CPU until restarted. */
  156 #define IPI_SUSPEND     (APIC_IPI_INTS + 8)     /* Suspend CPU until restarted. */
  157 #define IPI_STOP_HARD   (APIC_IPI_INTS + 9)     /* Stop CPU with a NMI. */
  158 #endif /* XEN */
  159 
  160 /*
  161  * The spurious interrupt can share the priority class with the IPIs since
  162  * it is not a normal interrupt. (Does not use the APIC's interrupt fifo)
  163  */
  164 #define APIC_SPURIOUS_INT 255
  165 
  166 #define LVT_LINT0       0
  167 #define LVT_LINT1       1
  168 #define LVT_TIMER       2
  169 #define LVT_ERROR       3
  170 #define LVT_PMC         4
  171 #define LVT_THERMAL     5
  172 #define LVT_CMCI        6
  173 #define LVT_MAX         LVT_CMCI
  174 
  175 #ifndef LOCORE
  176 
  177 #define APIC_IPI_DEST_SELF      -1
  178 #define APIC_IPI_DEST_ALL       -2
  179 #define APIC_IPI_DEST_OTHERS    -3
  180 
  181 #define APIC_BUS_UNKNOWN        -1
  182 #define APIC_BUS_ISA            0
  183 #define APIC_BUS_EISA           1
  184 #define APIC_BUS_PCI            2
  185 #define APIC_BUS_MAX            APIC_BUS_PCI
  186 
  187 /*
  188  * An APIC enumerator is a psuedo bus driver that enumerates APIC's including
  189  * CPU's and I/O APIC's.
  190  */
  191 struct apic_enumerator {
  192         const char *apic_name;
  193         int (*apic_probe)(void);
  194         int (*apic_probe_cpus)(void);
  195         int (*apic_setup_local)(void);
  196         int (*apic_setup_io)(void);
  197         SLIST_ENTRY(apic_enumerator) apic_next;
  198 };
  199 
  200 inthand_t
  201         IDTVEC(apic_isr1), IDTVEC(apic_isr2), IDTVEC(apic_isr3),
  202         IDTVEC(apic_isr4), IDTVEC(apic_isr5), IDTVEC(apic_isr6),
  203         IDTVEC(apic_isr7), IDTVEC(cmcint), IDTVEC(errorint),
  204         IDTVEC(spuriousint), IDTVEC(timerint);
  205 
  206 extern vm_paddr_t lapic_paddr;
  207 extern int apic_cpuids[];
  208 
  209 u_int   apic_alloc_vector(u_int apic_id, u_int irq);
  210 u_int   apic_alloc_vectors(u_int apic_id, u_int *irqs, u_int count,
  211             u_int align);
  212 void    apic_disable_vector(u_int apic_id, u_int vector);
  213 void    apic_enable_vector(u_int apic_id, u_int vector);
  214 void    apic_free_vector(u_int apic_id, u_int vector, u_int irq);
  215 u_int   apic_idt_to_irq(u_int apic_id, u_int vector);
  216 void    apic_register_enumerator(struct apic_enumerator *enumerator);
  217 u_int   apic_cpuid(u_int apic_id);
  218 void    *ioapic_create(vm_paddr_t addr, int32_t apic_id, int intbase);
  219 int     ioapic_disable_pin(void *cookie, u_int pin);
  220 int     ioapic_get_vector(void *cookie, u_int pin);
  221 void    ioapic_register(void *cookie);
  222 int     ioapic_remap_vector(void *cookie, u_int pin, int vector);
  223 int     ioapic_set_bus(void *cookie, u_int pin, int bus_type);
  224 int     ioapic_set_extint(void *cookie, u_int pin);
  225 int     ioapic_set_nmi(void *cookie, u_int pin);
  226 int     ioapic_set_polarity(void *cookie, u_int pin, enum intr_polarity pol);
  227 int     ioapic_set_triggermode(void *cookie, u_int pin,
  228             enum intr_trigger trigger);
  229 int     ioapic_set_smi(void *cookie, u_int pin);
  230 void    lapic_create(u_int apic_id, int boot_cpu);
  231 void    lapic_disable(void);
  232 void    lapic_disable_pmc(void);
  233 void    lapic_dump(const char *str);
  234 void    lapic_enable_cmc(void);
  235 int     lapic_enable_pmc(void);
  236 void    lapic_eoi(void);
  237 int     lapic_id(void);
  238 void    lapic_init(vm_paddr_t addr);
  239 int     lapic_intr_pending(u_int vector);
  240 void    lapic_ipi_raw(register_t icrlo, u_int dest);
  241 void    lapic_ipi_vectored(u_int vector, int dest);
  242 int     lapic_ipi_wait(int delay);
  243 void    lapic_handle_cmc(void);
  244 void    lapic_handle_error(void);
  245 void    lapic_handle_intr(int vector, struct trapframe *frame);
  246 void    lapic_handle_timer(struct trapframe *frame);
  247 void    lapic_reenable_pmc(void);
  248 void    lapic_set_logical_id(u_int apic_id, u_int cluster, u_int cluster_id);
  249 int     lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked);
  250 int     lapic_set_lvt_mode(u_int apic_id, u_int lvt, u_int32_t mode);
  251 int     lapic_set_lvt_polarity(u_int apic_id, u_int lvt,
  252             enum intr_polarity pol);
  253 int     lapic_set_lvt_triggermode(u_int apic_id, u_int lvt,
  254             enum intr_trigger trigger);
  255 void    lapic_set_tpr(u_int vector);
  256 void    lapic_setup(int boot);
  257 
  258 #endif /* !LOCORE */
  259 #endif /* _MACHINE_APICVAR_H_ */

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