ioapic.c (bf21cd93) ioapic.c (4c87aefe)
1/*-
1/*-
2 * Copyright (c) 2014 Advanced Computing Technologies LLC
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2014 Hudson River Trading LLC
3 * Written by: John H. Baldwin <jhb@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.

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21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
5 * Written by: John H. Baldwin <jhb@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.

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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/usr.sbin/bhyve/ioapic.c 261268 2014-01-29 14:56:48Z jhb $");
31__FBSDID("$FreeBSD$");
30
31#include <sys/types.h>
32
33#include <sys/types.h>
34#include <stdio.h>
32
33#include <machine/vmm.h>
34#include <vmmapi.h>
35
36#include "ioapic.h"
35
36#include <machine/vmm.h>
37#include <vmmapi.h>
38
39#include "ioapic.h"
40#include "pci_emul.h"
41#include "pci_lpc.h"
37
38/*
39 * Assign PCI INTx interrupts to I/O APIC pins in a round-robin
40 * fashion. Note that we have no idea what the HPET is using, but the
41 * HPET is also programmable whereas this is intended for hardwired
42 * PCI interrupts.
43 *
44 * This assumes a single I/O APIC where pins >= 16 are permitted for

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59 if (pci_pins <= 16) {
60 pci_pins = 0;
61 return;
62 }
63 pci_pins -= 16;
64}
65
66int
42
43/*
44 * Assign PCI INTx interrupts to I/O APIC pins in a round-robin
45 * fashion. Note that we have no idea what the HPET is using, but the
46 * HPET is also programmable whereas this is intended for hardwired
47 * PCI interrupts.
48 *
49 * This assumes a single I/O APIC where pins >= 16 are permitted for

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64 if (pci_pins <= 16) {
65 pci_pins = 0;
66 return;
67 }
68 pci_pins -= 16;
69}
70
71int
67ioapic_pci_alloc_irq(void)
72ioapic_pci_alloc_irq(struct pci_devinst *pi)
68{
69 static int last_pin;
70
71 if (pci_pins == 0)
72 return (-1);
73{
74 static int last_pin;
75
76 if (pci_pins == 0)
77 return (-1);
78 if (lpc_bootrom()) {
79 /* For external bootrom use fixed mapping. */
80 return (16 + (4 + pi->pi_slot + pi->pi_lintr.pin) % 8);
81 }
73 return (16 + (last_pin++ % pci_pins));
74}
82 return (16 + (last_pin++ % pci_pins));
83}