1 /* $NetBSD: cpu_mainbus.c,v 1.15 2014/06/05 03:46:26 matt Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Mark Brinicombe. 5 * Copyright (c) 1995 Brini. 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. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Brini. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * RiscBSD kernel project 36 * 37 * cpu.c 38 * 39 * Probing and configuration for the master cpu 40 * 41 * Created : 10/10/95 42 */ 43 44 #include "locators.h" 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: cpu_mainbus.c,v 1.15 2014/06/05 03:46:26 matt Exp $"); 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/cpu.h> 52 #include <sys/device.h> 53 #include <sys/proc.h> 54 55 #include <arm/mainbus/mainbus.h> 56 57 /* 58 * Prototypes 59 */ 60 static int cpu_mainbus_match(device_t, cfdata_t, void *); 61 static void cpu_mainbus_attach(device_t, device_t, void *); 62 63 /* 64 * int cpumatch(device_t parent, cfdata_t cf, void *aux) 65 * 66 * Probe for the main cpu. Currently all this does is return 1 to 67 * indicate that the cpu was found. 68 */ 69 #ifdef MULTIPROCESSOR 70 extern u_int arm_cpu_max; 71 #else 72 #define arm_cpu_max 1 73 #endif 74 75 static int 76 cpu_mainbus_match(device_t parent, cfdata_t cf, void *aux) 77 { 78 struct mainbus_attach_args * const mb = aux; 79 int id = mb->mb_core; 80 81 if (id != MAINBUSCF_CORE_DEFAULT) { 82 if (id == 0) 83 return cpu_info_store.ci_dev == NULL; 84 if (id >= arm_cpu_max) 85 return 0; 86 #ifdef MULTIPROCESSOR 87 if (cpu_info[id] != NULL) 88 return 0; 89 #endif 90 return 1; 91 } 92 93 if (cpu_info_store.ci_dev == NULL) { 94 mb->mb_core = 0; 95 return 1; 96 } 97 98 #ifdef MULTIPROCESSOR 99 for (id = 1; id < arm_cpu_max; id++) { 100 if (cpu_info[id] != NULL) 101 continue; 102 mb->mb_core = id; 103 return 1; 104 } 105 #endif 106 107 return 0; 108 } 109 110 /* 111 * void cpusattach(device_t parent, device_t dev, void *aux) 112 * 113 * Attach the main cpu 114 */ 115 116 static void 117 cpu_mainbus_attach(device_t parent, device_t self, void *aux) 118 { 119 struct mainbus_attach_args * const mb = aux; 120 121 cpu_attach(self, mb->mb_core); 122 } 123 124 CFATTACH_DECL_NEW(cpu_mainbus, 0, 125 cpu_mainbus_match, cpu_mainbus_attach, NULL, NULL); 126