1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * Generic x86 CPU Module 31 * 32 * This CPU module is used for generic x86 CPUs when Solaris has no other 33 * CPU-specific support module available. Code in this module should be the 34 * absolute bare-bones support and must be cognizant of both Intel and AMD etc. 35 */ 36 37 #include <sys/types.h> 38 #include <sys/cpu_module_impl.h> 39 #include <sys/cpuvar.h> 40 #include <sys/kmem.h> 41 #include <sys/modctl.h> 42 #include <sys/pghw.h> 43 44 #include "gcpu.h" 45 46 /* 47 * Prevent generic cpu support from loading. 48 */ 49 int gcpu_disable = 0; 50 51 #define GCPU_MAX_CHIPID 32 52 static struct gcpu_chipshared *gcpu_shared[GCPU_MAX_CHIPID]; 53 54 /* 55 * Our cmi_init entry point, called during startup of each cpu instance. 56 */ 57 int 58 gcpu_init(cmi_hdl_t hdl, void **datap) 59 { 60 uint_t chipid = cmi_hdl_chipid(hdl); 61 struct gcpu_chipshared *sp, *osp; 62 gcpu_data_t *gcpu; 63 64 if (gcpu_disable || chipid >= GCPU_MAX_CHIPID) 65 return (ENOTSUP); 66 67 /* 68 * Allocate the state structure for this cpu. We will only 69 * allocate the bank logout areas in gcpu_mca_init once we 70 * know how many banks there are. 71 */ 72 gcpu = *datap = kmem_zalloc(sizeof (gcpu_data_t), KM_SLEEP); 73 cmi_hdl_hold(hdl); /* release in gcpu_fini */ 74 gcpu->gcpu_hdl = hdl; 75 76 /* 77 * Allocate a chipshared structure if no sibling cpu has already 78 * allocated it, but allow for the fact that a sibling core may 79 * be starting up in parallel. 80 */ 81 if ((sp = gcpu_shared[chipid]) == NULL) { 82 sp = kmem_zalloc(sizeof (struct gcpu_chipshared), KM_SLEEP); 83 osp = atomic_cas_ptr(&gcpu_shared[chipid], NULL, sp); 84 if (osp == NULL) { 85 mutex_init(&sp->gcpus_poll_lock, NULL, MUTEX_DRIVER, 86 NULL); 87 mutex_init(&sp->gcpus_cfglock, NULL, MUTEX_DRIVER, 88 NULL); 89 } else { 90 kmem_free(sp, sizeof (struct gcpu_chipshared)); 91 sp = osp; 92 } 93 } 94 gcpu->gcpu_shared = sp; 95 96 return (0); 97 } 98 99 void 100 gcpu_post_startup(cmi_hdl_t hdl) 101 { 102 gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); 103 104 if (gcpu_disable || gcpu == NULL) 105 return; 106 107 cms_post_startup(hdl); 108 } 109 110 void 111 gcpu_post_mpstartup(cmi_hdl_t hdl) 112 { if (!gcpu_disable) { 113 cms_post_mpstartup(hdl); 114 gcpu_mca_poll_start(hdl); 115 } 116 } 117 118 cmi_api_ver_t _cmi_api_version = CMI_API_VERSION_1; 119 120 const cmi_ops_t _cmi_ops = { 121 gcpu_init, /* cmi_init */ 122 gcpu_post_startup, /* cmi_post_startup */ 123 gcpu_post_mpstartup, /* cmi_post_mpstartup */ 124 gcpu_faulted_enter, /* cmi_faulted_enter */ 125 gcpu_faulted_exit, /* cmi_faulted_exit */ 126 gcpu_mca_init, /* cmi_mca_init */ 127 gcpu_mca_trap, /* cmi_mca_trap */ 128 gcpu_msrinject, /* cmi_msrinject */ 129 gcpu_hdl_poke, /* cmi_hdl_poke */ 130 NULL, /* cmi_fini */ 131 }; 132 133 static struct modlcpu modlcpu = { 134 &mod_cpuops, 135 "Generic x86 CPU Module" 136 }; 137 138 static struct modlinkage modlinkage = { 139 MODREV_1, 140 (void *)&modlcpu, 141 NULL 142 }; 143 144 int 145 _init(void) 146 { 147 return (mod_install(&modlinkage)); 148 } 149 150 int 151 _info(struct modinfo *modinfop) 152 { 153 return (mod_info(&modlinkage, modinfop)); 154 } 155 156 int 157 _fini(void) 158 { 159 return (mod_remove(&modlinkage)); 160 } 161