/* $NetBSD: gic_acpi.c,v 1.7.6.1 2023/11/29 12:33:08 martin Exp $ */ /*- * Copyright (c) 2018 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jared McNeill . * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include "pci.h" #include __KERNEL_RCSID(0, "$NetBSD: gic_acpi.c,v 1.7.6.1 2023/11/29 12:33:08 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #define GICD_SIZE 0x1000 #define GICC_SIZE 0x1000 extern struct bus_space arm_generic_bs_tag; extern struct pic_softc *pic_list[]; static int gic_acpi_match(device_t, cfdata_t, void *); static void gic_acpi_attach(device_t, device_t, void *); static ACPI_STATUS gic_acpi_find_gicc(ACPI_SUBTABLE_HEADER *, void *); CFATTACH_DECL_NEW(gic_acpi, 0, gic_acpi_match, gic_acpi_attach, NULL, NULL); static int gic_acpi_match(device_t parent, cfdata_t cf, void *aux) { ACPI_SUBTABLE_HEADER *hdrp = aux; ACPI_MADT_GENERIC_DISTRIBUTOR *gicd; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR) return 0; gicd = (ACPI_MADT_GENERIC_DISTRIBUTOR *)hdrp; switch (gicd->Version) { case ACPI_MADT_GIC_VERSION_NONE: return __SHIFTOUT(reg_id_aa64pfr0_el1_read(), ID_AA64PFR0_EL1_GIC) == 0; case ACPI_MADT_GIC_VERSION_V1: case ACPI_MADT_GIC_VERSION_V2: return 1; default: return 0; } } static void gic_acpi_attach(device_t parent, device_t self, void *aux) { ACPI_MADT_GENERIC_DISTRIBUTOR *gicd = aux; ACPI_MADT_GENERIC_INTERRUPT *gicc = NULL; bus_space_handle_t bsh; device_t armgic; int error; acpi_madt_walk(gic_acpi_find_gicc, &gicc); if (gicc == NULL) { aprint_error(": couldn't find GICC registers\n"); return; } const bus_addr_t addr = ulmin(gicd->BaseAddress, gicc->BaseAddress); const bus_size_t end = ulmax(gicd->BaseAddress + GICD_SIZE, gicc->BaseAddress + GICC_SIZE); const bus_size_t size = end - addr; error = bus_space_map(&arm_generic_bs_tag, addr, size, 0, &bsh); if (error) { aprint_error(": couldn't map registers: %d\n", error); return; } aprint_naive("\n"); aprint_normal(": GIC\n"); struct mpcore_attach_args mpcaa = { .mpcaa_name = "armgic", .mpcaa_memt = &arm_generic_bs_tag, .mpcaa_memh = bsh, .mpcaa_off1 = gicd->BaseAddress - addr, .mpcaa_off2 = gicc->BaseAddress - addr, }; armgic = config_found(self, &mpcaa, NULL, CFARGS_NONE); if (armgic != NULL) { arm_fdt_irq_set_handler(armgic_irq_handler); #if NPCI > 0 acpi_madt_walk(gic_v2m_acpi_find_msi_frame, armgic); #endif } } static ACPI_STATUS gic_acpi_find_gicc(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { ACPI_MADT_GENERIC_INTERRUPT **giccp = aux; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_INTERRUPT) return AE_OK; *giccp = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; return AE_LIMIT; }