1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2014 Hudson River Trading LLC
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* Written by: John H. Baldwin <jhb@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <stdio.h>
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#include <machine/vmm.h>
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#include <vmmapi.h>
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#include "ioapic.h"
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#include "pci_emul.h"
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#include "pci_lpc.h"
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/*
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* Assign PCI INTx interrupts to I/O APIC pins in a round-robin
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* fashion. Note that we have no idea what the HPET is using, but the
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* HPET is also programmable whereas this is intended for hardwired
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* PCI interrupts.
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*
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* This assumes a single I/O APIC where pins >= 16 are permitted for
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* PCI devices.
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*/
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static int pci_pins;
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void
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ioapic_init(struct vmctx *ctx)
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{
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if (vm_ioapic_pincount(ctx, &pci_pins) < 0) {
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pci_pins = 0;
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return;
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}
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/* Ignore the first 16 pins. */
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if (pci_pins <= 16) {
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pci_pins = 0;
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return;
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}
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pci_pins -= 16;
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}
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int
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ioapic_pci_alloc_irq(struct pci_devinst *pi)
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{
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static int last_pin;
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if (pci_pins == 0)
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return (-1);
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if (lpc_bootrom()) {
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/* For external bootrom use fixed mapping. */
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return (16 + (4 + pi->pi_slot + pi->pi_lintr.pin) % 8);
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}
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return (16 + (last_pin++ % pci_pins));
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}
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