platform.c revision 262675
1/*- 2 * Copyright (c) 2005 Peter Grehan 3 * Copyright (c) 2009 Nathan Whitehorn 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/powerpc/powerpc/platform.c 262675 2014-03-02 02:35:46Z jhibbits $"); 31 32/* 33 * Dispatch platform calls to the appropriate platform implementation 34 * through a previously registered kernel object. 35 */ 36 37#include <sys/param.h> 38#include <sys/kernel.h> 39#include <sys/lock.h> 40#include <sys/ktr.h> 41#include <sys/mutex.h> 42#include <sys/systm.h> 43#include <sys/smp.h> 44#include <sys/sysctl.h> 45#include <sys/types.h> 46 47#include <vm/vm.h> 48#include <vm/vm_page.h> 49 50#include <machine/cpu.h> 51#include <machine/md_var.h> 52#include <machine/platform.h> 53#include <machine/platformvar.h> 54#include <machine/smp.h> 55 56#include "platform_if.h" 57 58static platform_def_t *plat_def_impl; 59static platform_t plat_obj; 60static struct kobj_ops plat_kernel_kops; 61static struct platform_kobj plat_kernel_obj; 62 63static char plat_name[64] = ""; 64SYSCTL_STRING(_hw, OID_AUTO, platform, CTLFLAG_RD | CTLFLAG_TUN, 65 plat_name, 0, "Platform currently in use"); 66 67static struct mem_region *pregions = NULL; 68static struct mem_region *aregions = NULL; 69static int npregions, naregions; 70 71void 72mem_regions(struct mem_region **phys, int *physsz, struct mem_region **avail, 73 int *availsz) 74{ 75 if (pregions == NULL) 76 PLATFORM_MEM_REGIONS(plat_obj, &pregions, &npregions, 77 &aregions, &naregions); 78 79 *phys = pregions; 80 *avail = aregions; 81 *physsz = npregions; 82 *availsz = naregions; 83} 84 85int 86mem_valid(vm_offset_t addr, int len) 87{ 88 int i; 89 90 if (pregions == NULL) 91 PLATFORM_MEM_REGIONS(plat_obj, &pregions, &npregions, 92 &aregions, &naregions); 93 94 for (i = 0; i < npregions; i++) 95 if ((addr >= pregions[i].mr_start) 96 && (addr + len <= pregions[i].mr_start + pregions[i].mr_size)) 97 return (0); 98 99 return (EFAULT); 100} 101 102vm_offset_t 103platform_real_maxaddr(void) 104{ 105 return (PLATFORM_REAL_MAXADDR(plat_obj)); 106} 107 108const char * 109installed_platform() 110{ 111 return (plat_def_impl->name); 112} 113 114u_long 115platform_timebase_freq(struct cpuref *cpu) 116{ 117 return (PLATFORM_TIMEBASE_FREQ(plat_obj, cpu)); 118} 119 120/* 121 * Put the current CPU, as last step in suspend, to sleep 122 */ 123void 124platform_sleep() 125{ 126 PLATFORM_SLEEP(plat_obj); 127} 128 129int 130platform_smp_first_cpu(struct cpuref *cpu) 131{ 132 return (PLATFORM_SMP_FIRST_CPU(plat_obj, cpu)); 133} 134 135int 136platform_smp_next_cpu(struct cpuref *cpu) 137{ 138 return (PLATFORM_SMP_NEXT_CPU(plat_obj, cpu)); 139} 140 141int 142platform_smp_get_bsp(struct cpuref *cpu) 143{ 144 return (PLATFORM_SMP_GET_BSP(plat_obj, cpu)); 145} 146 147int 148platform_smp_start_cpu(struct pcpu *cpu) 149{ 150 return (PLATFORM_SMP_START_CPU(plat_obj, cpu)); 151} 152 153void 154platform_smp_ap_init() 155{ 156 PLATFORM_SMP_AP_INIT(plat_obj); 157} 158 159#ifdef SMP 160struct cpu_group * 161cpu_topo(void) 162{ 163 return (PLATFORM_SMP_TOPO(plat_obj)); 164} 165#endif 166 167/* 168 * Reset back to firmware. 169 */ 170void 171cpu_reset() 172{ 173 PLATFORM_RESET(plat_obj); 174} 175 176/* 177 * Platform install routines. Highest priority wins, using the same 178 * algorithm as bus attachment. 179 */ 180SET_DECLARE(platform_set, platform_def_t); 181 182void 183platform_probe_and_attach() 184{ 185 platform_def_t **platpp, *platp; 186 int prio, best_prio; 187 188 plat_obj = &plat_kernel_obj; 189 best_prio = 0; 190 191 /* 192 * Try to locate the best platform kobj 193 */ 194 SET_FOREACH(platpp, platform_set) { 195 platp = *platpp; 196 197 /* 198 * Take care of compiling the selected class, and 199 * then statically initialise the MMU object 200 */ 201 kobj_class_compile_static(platp, &plat_kernel_kops); 202 kobj_init_static((kobj_t)plat_obj, platp); 203 204 prio = PLATFORM_PROBE(plat_obj); 205 206 /* Check for errors */ 207 if (prio > 0) 208 continue; 209 210 /* 211 * Check if this module was specifically requested through 212 * the loader tunable we provide. 213 */ 214 if (strcmp(platp->name,plat_name) == 0) { 215 plat_def_impl = platp; 216 break; 217 } 218 219 /* Otherwise, see if it is better than our current best */ 220 if (plat_def_impl == NULL || prio > best_prio) { 221 best_prio = prio; 222 plat_def_impl = platp; 223 } 224 225 /* 226 * We can't free the KOBJ, since it is static. Reset the ops 227 * member of this class so that we can come back later. 228 */ 229 platp->ops = NULL; 230 } 231 232 if (plat_def_impl == NULL) 233 panic("No platform module found!"); 234 235 /* 236 * Recompile to make sure we ended with the 237 * correct one, and then attach. 238 */ 239 240 kobj_class_compile_static(plat_def_impl, &plat_kernel_kops); 241 kobj_init_static((kobj_t)plat_obj, plat_def_impl); 242 243 strlcpy(plat_name,plat_def_impl->name,sizeof(plat_name)); 244 245 PLATFORM_ATTACH(plat_obj); 246} 247 248