1 /* $NetBSD: gtmr_acpi.c,v 1.3 2019/04/29 12:53:15 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill@invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: gtmr_acpi.c,v 1.3 2019/04/29 12:53:15 christos Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/cpu.h> 38 #include <sys/device.h> 39 40 #include <dev/acpi/acpireg.h> 41 #include <dev/acpi/acpivar.h> 42 43 #include <arm/cortex/gtmr_intr.h> 44 #include <arm/cortex/mpcore_var.h> 45 #include <arm/cortex/gtmr_var.h> 46 47 #include <dev/fdt/fdtvar.h> 48 #include <arm/fdt/arm_fdtvar.h> 49 50 extern struct bus_space arm_generic_bs_tag; 51 52 static int gtmr_acpi_match(device_t, cfdata_t, void *); 53 static void gtmr_acpi_attach(device_t, device_t, void *); 54 55 static void gtmr_acpi_cpu_hatch(void *, struct cpu_info *); 56 57 CFATTACH_DECL_NEW(gtmr_acpi, 0, gtmr_acpi_match, gtmr_acpi_attach, NULL, NULL); 58 59 static int 60 gtmr_acpi_match(device_t parent, cfdata_t cf, void *aux) 61 { 62 ACPI_TABLE_HEADER *hdrp = aux; 63 64 return memcmp(hdrp->Signature, ACPI_SIG_GTDT, ACPI_NAMESEG_SIZE) == 0; 65 } 66 67 static void 68 gtmr_acpi_attach(device_t parent, device_t self, void *aux) 69 { 70 ACPI_TABLE_GTDT *gtdt = aux; 71 struct mpcore_attach_args mpcaa; 72 void *ih; 73 74 const int irq = gtdt->VirtualTimerInterrupt; 75 const int ipl = IPL_CLOCK; 76 const int type = (gtdt->VirtualTimerFlags & ACPI_GTDT_INTERRUPT_MODE) ? 77 IST_EDGE : IST_LEVEL; 78 79 aprint_naive("\n"); 80 aprint_normal(": irq %d\n", irq); 81 82 ih = intr_establish_xname(irq, ipl, type | IST_MPSAFE, gtmr_intr, NULL, device_xname(self)); 83 if (ih == NULL) { 84 aprint_error_dev(self, "couldn't install interrupt handler\n"); 85 return; 86 } 87 88 memset(&mpcaa, 0, sizeof(mpcaa)); 89 mpcaa.mpcaa_name = "armgtmr"; 90 mpcaa.mpcaa_irq = -1; 91 config_found(self, &mpcaa, NULL); 92 93 arm_fdt_cpu_hatch_register(self, gtmr_acpi_cpu_hatch); 94 arm_fdt_timer_register(gtmr_cpu_initclocks); 95 } 96 97 static void 98 gtmr_acpi_cpu_hatch(void *priv, struct cpu_info *ci) 99 { 100 gtmr_init_cpu_clock(ci); 101 } 102