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Diffstat (limited to 'freebsd/sys/x86/include/machine/intr_machdep.h')
| -rw-r--r-- | freebsd/sys/x86/include/machine/intr_machdep.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/freebsd/sys/x86/include/machine/intr_machdep.h b/freebsd/sys/x86/include/machine/intr_machdep.h new file mode 100644 index 00000000..346a33a4 --- /dev/null +++ b/freebsd/sys/x86/include/machine/intr_machdep.h @@ -0,0 +1,175 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> + * + * 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 __X86_INTR_MACHDEP_H__ +#define __X86_INTR_MACHDEP_H__ + +#ifdef _KERNEL + +/* + * Values used in determining the allocation of IRQ values among + * different types of I/O interrupts. These values are used as + * indices into a interrupt source array to map I/O interrupts to a + * device interrupt source whether it be a pin on an interrupt + * controller or an MSI interrupt. The 16 ISA IRQs are assigned fixed + * IDT vectors, but all other device interrupts allocate IDT vectors + * on demand. Currently we have 191 IDT vectors available for device + * interrupts on each CPU. On many systems with I/O APICs, a lot of + * the IRQs are not used, so the total number of IRQ values reserved + * can exceed the number of available IDT slots. + * + * The first 16 IRQs (0 - 15) are reserved for ISA IRQs. Interrupt + * pins on I/O APICs for non-ISA interrupts use IRQ values starting at + * IRQ 17. This layout matches the GSI numbering used by ACPI so that + * IRQ values returned by ACPI methods such as _CRS can be used + * directly by the ACPI bus driver. + * + * MSI interrupts allocate a block of interrupts starting at the end + * of the I/O APIC range. When running under the Xen Hypervisor, an + * additional range of IRQ values are available for binding to event + * channel events. + */ +extern u_int first_msi_irq; +extern u_int num_io_irqs; +extern u_int num_msi_irqs; + +/* + * Default base address for MSI messages on x86 platforms. + */ +#define MSI_INTEL_ADDR_BASE 0xfee00000 + +#ifndef LOCORE + +typedef void inthand_t(void); + +#define IDTVEC(name) __CONCAT(X,name) + +struct intsrc; + +/* + * Methods that a PIC provides to mask/unmask a given interrupt source, + * "turn on" the interrupt on the CPU side by setting up an IDT entry, and + * return the vector associated with this source. + */ +struct pic { + void (*pic_register_sources)(struct pic *); + void (*pic_enable_source)(struct intsrc *); + void (*pic_disable_source)(struct intsrc *, int); + void (*pic_eoi_source)(struct intsrc *); + void (*pic_enable_intr)(struct intsrc *); + void (*pic_disable_intr)(struct intsrc *); + int (*pic_vector)(struct intsrc *); + int (*pic_source_pending)(struct intsrc *); + void (*pic_suspend)(struct pic *); + void (*pic_resume)(struct pic *, bool suspend_cancelled); + int (*pic_config_intr)(struct intsrc *, enum intr_trigger, + enum intr_polarity); + int (*pic_assign_cpu)(struct intsrc *, u_int apic_id); + void (*pic_reprogram_pin)(struct intsrc *); + TAILQ_ENTRY(pic) pics; +}; + +/* Flags for pic_disable_source() */ +enum { + PIC_EOI, + PIC_NO_EOI, +}; + +/* + * An interrupt source. The upper-layer code uses the PIC methods to + * control a given source. The lower-layer PIC drivers can store additional + * private data in a given interrupt source such as an interrupt pin number + * or an I/O APIC pointer. + */ +struct intsrc { + struct pic *is_pic; + struct intr_event *is_event; + u_long *is_count; + u_long *is_straycount; + u_int is_index; + u_int is_handlers; + u_int is_domain; + u_int is_cpu; +}; + +struct trapframe; + +#ifdef SMP +extern cpuset_t intr_cpus; +#endif +extern struct mtx icu_lock; +extern int elcr_found; +#ifdef SMP +extern int msix_disable_migration; +#endif + +#ifndef DEV_ATPIC +void atpic_reset(void); +#endif +/* XXX: The elcr_* prototypes probably belong somewhere else. */ +int elcr_probe(void); +enum intr_trigger elcr_read_trigger(u_int irq); +void elcr_resume(void); +void elcr_write_trigger(u_int irq, enum intr_trigger trigger); +#ifdef SMP +void intr_add_cpu(u_int cpu); +#endif +int intr_add_handler(const char *name, int vector, driver_filter_t filter, + driver_intr_t handler, void *arg, enum intr_type flags, void **cookiep, + int domain); +#ifdef SMP +int intr_bind(u_int vector, u_char cpu); +#endif +int intr_config_intr(int vector, enum intr_trigger trig, + enum intr_polarity pol); +int intr_describe(u_int vector, void *ih, const char *descr); +void intr_execute_handlers(struct intsrc *isrc, struct trapframe *frame); +u_int intr_next_cpu(int domain); +struct intsrc *intr_lookup_source(int vector); +int intr_register_pic(struct pic *pic); +int intr_register_source(struct intsrc *isrc); +int intr_remove_handler(void *cookie); +void intr_resume(bool suspend_cancelled); +void intr_suspend(void); +void intr_reprogram(void); +void intrcnt_add(const char *name, u_long **countp); +void nexus_add_irq(u_long irq); +int msi_alloc(device_t dev, int count, int maxcount, int *irqs); +void msi_init(void); +int msi_map(int irq, uint64_t *addr, uint32_t *data); +int msi_release(int *irqs, int count); +int msix_alloc(device_t dev, int *irq); +int msix_release(int irq); +#ifdef XENHVM +void xen_intr_alloc_irqs(void); +#endif + +#endif /* !LOCORE */ +#endif /* _KERNEL */ +#endif /* !__X86_INTR_MACHDEP_H__ */ |