1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2024 Jessica Clarke <jrtc27@FreeBSD.org> 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. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 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 <vmmapi.h> 29 30 #include "pci_emul.h" 31 #include "pci_irq.h" 32 33 static int gic_irqs[4]; 34 35 void 36 pci_irq_init(int intrs[static 4]) 37 { 38 int i; 39 40 for (i = 0; i < 4; ++i) 41 gic_irqs[i] = intrs[i]; 42 } 43 44 void 45 pci_irq_assert(struct pci_devinst *pi) 46 { 47 vm_assert_irq(pi->pi_vmctx, pi->pi_lintr.irq.gic_irq); 48 } 49 50 void 51 pci_irq_deassert(struct pci_devinst *pi) 52 { 53 vm_deassert_irq(pi->pi_vmctx, pi->pi_lintr.irq.gic_irq); 54 } 55 56 void 57 pci_irq_route(struct pci_devinst *pi, struct pci_irq *irq) 58 { 59 /* 60 * Assign swizzled IRQ for this INTx if one is not yet assigned. Must 61 * match fdt_add_pcie(). 62 */ 63 if (irq->gic_irq == 0) 64 irq->gic_irq = 65 gic_irqs[(pi->pi_slot + pi->pi_lintr.pin - 1) % 4]; 66 } 67