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freebsd-dev/sys/i386/include/apicvar.h
John Baldwin 520ffff83e Change the x86 interrupt code to suspend/resume interrupt controllers 
(PICs) rather than interrupt sources.  This allows interrupt controllers
with no interrupt pics (such as the 8259As when APIC is in use) to
participate in suspend/resume.
- Always register the 8259A PICs even if we don't use any of their pins.
- Explicitly reset the 8259As on resume on amd64 if 'device atpic' isn't
  included.
- Add a "dummy" PIC for the local APIC on the BSP to reset the local APIC
  on resume.  This gets suspend/resume working with APIC on UP systems.
  SMP still needs more work to bring the APs back to life.

The MFC after is tentative.

Tested by:	anholt (i386)
Submitted by:	Andrea Bittau <a.bittau at cs.ucl.ac.uk> (3)
MFC after:	1 week
2006-10-10 23:23:12 +00:00

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/*-
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 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.
*
* Right now IPI_STOP used by kdb shares the interrupt priority class with
* the two IPI groups mentioned above. As such IPI_STOP may cause a deadlock.
* Eventually IPI_STOP should use NMI IPIs - this would eliminate this and
* other deadlocks caused by IPI_STOP.
*/
/* 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_IPI_INTS (APIC_LOCAL_INTS + 2)
#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_BITMAP_LAST IPI_PREEMPT
#define IPI_IS_BITMAPED(x) ((x) <= IPI_BITMAP_LAST)
#define IPI_STOP (APIC_IPI_INTS + 7) /* Stop CPU until restarted. */
/*
* 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
#define LVT_LINT0 0
#define LVT_LINT1 1
#define LVT_TIMER 2
#define LVT_ERROR 3
#define LVT_PMC 4
#define LVT_THERMAL 5
#define LVT_MAX LVT_THERMAL
#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(spuriousint), IDTVEC(timerint);
u_int apic_alloc_vector(u_int irq);
void apic_enable_vector(u_int vector);
void apic_free_vector(u_int vector, u_int irq);
u_int apic_idt_to_irq(u_int vector);
void apic_register_enumerator(struct apic_enumerator *enumerator);
void *ioapic_create(uintptr_t addr, int32_t 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_dump(const char *str);
void lapic_eoi(void);
int lapic_id(void);
void lapic_init(uintptr_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_intr(int vector, struct trapframe frame);
void lapic_handle_timer(struct trapframe frame);
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);
int lapic_setup_clock(void);
#endif /* !LOCORE */
#endif /* _MACHINE_APICVAR_H_ */
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