/*- * Copyright (c) 2003 John Baldwin * * 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: stable/11/sys/x86/include/intr_machdep.h 367457 2020-11-07 18:10:59Z dim $ */ #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 either * the end of the I/O APIC range or 256, whichever is higher. When * running under the Xen Hypervisor, an additional range of IRQ values * are available for binding to event channel events. We use 256 as * the minimum IRQ value for MSI interrupts to attempt to leave 255 * unused since 255 is used in PCI to indicate an invalid INTx IRQ. */ #define MINIMUM_MSI_INT 256 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; }; 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); #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(void); 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__ */