gtmr_fdt.c revision 1.7.2.2
1 1.7.2.2 jdolecek /* $NetBSD: gtmr_fdt.c,v 1.7.2.2 2017/12/03 11:35:52 jdolecek Exp $ */ 2 1.7.2.2 jdolecek 3 1.7.2.2 jdolecek /*- 4 1.7.2.2 jdolecek * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.7.2.2 jdolecek * All rights reserved. 6 1.7.2.2 jdolecek * 7 1.7.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.7.2.2 jdolecek * modification, are permitted provided that the following conditions 9 1.7.2.2 jdolecek * are met: 10 1.7.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.7.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.7.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.7.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.7.2.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.7.2.2 jdolecek * 16 1.7.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.7.2.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.7.2.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.7.2.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.7.2.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.7.2.2 jdolecek * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.7.2.2 jdolecek * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.7.2.2 jdolecek * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.7.2.2 jdolecek * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.7.2.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.7.2.2 jdolecek * SUCH DAMAGE. 27 1.7.2.2 jdolecek */ 28 1.7.2.2 jdolecek 29 1.7.2.2 jdolecek #include <sys/cdefs.h> 30 1.7.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: gtmr_fdt.c,v 1.7.2.2 2017/12/03 11:35:52 jdolecek Exp $"); 31 1.7.2.2 jdolecek 32 1.7.2.2 jdolecek #include <sys/param.h> 33 1.7.2.2 jdolecek #include <sys/bus.h> 34 1.7.2.2 jdolecek #include <sys/device.h> 35 1.7.2.2 jdolecek #include <sys/intr.h> 36 1.7.2.2 jdolecek #include <sys/systm.h> 37 1.7.2.2 jdolecek #include <sys/kernel.h> 38 1.7.2.2 jdolecek #include <sys/kmem.h> 39 1.7.2.2 jdolecek 40 1.7.2.2 jdolecek #include <arm/cortex/gtmr_intr.h> 41 1.7.2.2 jdolecek #include <arm/cortex/mpcore_var.h> 42 1.7.2.2 jdolecek #include <arm/cortex/gtmr_var.h> 43 1.7.2.2 jdolecek 44 1.7.2.2 jdolecek #include <dev/fdt/fdtvar.h> 45 1.7.2.2 jdolecek #include <arm/fdt/arm_fdtvar.h> 46 1.7.2.2 jdolecek 47 1.7.2.2 jdolecek static int gtmr_fdt_match(device_t, cfdata_t, void *); 48 1.7.2.2 jdolecek static void gtmr_fdt_attach(device_t, device_t, void *); 49 1.7.2.2 jdolecek 50 1.7.2.2 jdolecek static void gtmr_fdt_cpu_hatch(void *, struct cpu_info *); 51 1.7.2.2 jdolecek 52 1.7.2.2 jdolecek CFATTACH_DECL_NEW(gtmr_fdt, 0, gtmr_fdt_match, gtmr_fdt_attach, NULL, NULL); 53 1.7.2.2 jdolecek 54 1.7.2.2 jdolecek /* The virtual timer list entry */ 55 1.7.2.2 jdolecek #define GTMR_VTIMER 2 56 1.7.2.2 jdolecek 57 1.7.2.2 jdolecek static int 58 1.7.2.2 jdolecek gtmr_fdt_match(device_t parent, cfdata_t cf, void *aux) 59 1.7.2.2 jdolecek { 60 1.7.2.2 jdolecek const char * const compatible[] = { 61 1.7.2.2 jdolecek "arm,armv7-timer", 62 1.7.2.2 jdolecek "arm,armv8-timer", 63 1.7.2.2 jdolecek NULL 64 1.7.2.2 jdolecek }; 65 1.7.2.2 jdolecek struct fdt_attach_args * const faa = aux; 66 1.7.2.2 jdolecek 67 1.7.2.2 jdolecek return of_compatible(faa->faa_phandle, compatible) >= 0; 68 1.7.2.2 jdolecek } 69 1.7.2.2 jdolecek 70 1.7.2.2 jdolecek static void 71 1.7.2.2 jdolecek gtmr_fdt_attach(device_t parent, device_t self, void *aux) 72 1.7.2.2 jdolecek { 73 1.7.2.2 jdolecek aprint_naive("\n"); 74 1.7.2.2 jdolecek aprint_normal(": Generic Timer\n"); 75 1.7.2.2 jdolecek 76 1.7.2.2 jdolecek struct mpcore_attach_args mpcaa = { 77 1.7.2.2 jdolecek .mpcaa_name = "armgtmr", 78 1.7.2.2 jdolecek .mpcaa_irq = -1 /* setup handler locally */ 79 1.7.2.2 jdolecek }; 80 1.7.2.2 jdolecek struct fdt_attach_args * const faa = aux; 81 1.7.2.2 jdolecek const int phandle = faa->faa_phandle; 82 1.7.2.2 jdolecek 83 1.7.2.2 jdolecek char intrstr[128]; 84 1.7.2.2 jdolecek if (!fdtbus_intr_str(phandle, GTMR_VTIMER, intrstr, sizeof(intrstr))) { 85 1.7.2.2 jdolecek aprint_error(": failed to decode interrupt\n"); 86 1.7.2.2 jdolecek return; 87 1.7.2.2 jdolecek } 88 1.7.2.2 jdolecek 89 1.7.2.2 jdolecek void *ih = fdtbus_intr_establish(phandle, GTMR_VTIMER, IPL_CLOCK, 90 1.7.2.2 jdolecek FDT_INTR_MPSAFE, gtmr_intr, NULL); 91 1.7.2.2 jdolecek if (ih == NULL) { 92 1.7.2.2 jdolecek aprint_error_dev(self, "couldn't install interrupt handler\n"); 93 1.7.2.2 jdolecek return; 94 1.7.2.2 jdolecek } 95 1.7.2.2 jdolecek aprint_normal_dev(self, "interrupting on %s\n", intrstr); 96 1.7.2.2 jdolecek 97 1.7.2.2 jdolecek config_found(self, &mpcaa, NULL); 98 1.7.2.2 jdolecek 99 1.7.2.2 jdolecek arm_fdt_cpu_hatch_register(self, gtmr_fdt_cpu_hatch); 100 1.7.2.2 jdolecek arm_fdt_timer_register(gtmr_cpu_initclocks); 101 1.7.2.2 jdolecek } 102 1.7.2.2 jdolecek 103 1.7.2.2 jdolecek static void 104 1.7.2.2 jdolecek gtmr_fdt_cpu_hatch(void *priv, struct cpu_info *ci) 105 1.7.2.2 jdolecek { 106 1.7.2.2 jdolecek gtmr_init_cpu_clock(ci); 107 1.7.2.2 jdolecek } 108
Indexes created Mon Oct 20 20:10:13 GMT 2025