1266301Sandrew/*- 2266301Sandrew * Copyright (c) 2005 Peter Grehan 3266301Sandrew * Copyright (c) 2009 Nathan Whitehorn 4266301Sandrew * All rights reserved. 5266301Sandrew * 6266301Sandrew * Redistribution and use in source and binary forms, with or without 7266301Sandrew * modification, are permitted provided that the following conditions 8266301Sandrew * are met: 9266301Sandrew * 1. Redistributions of source code must retain the above copyright 10266301Sandrew * notice, this list of conditions and the following disclaimer. 11266301Sandrew * 2. Redistributions in binary form must reproduce the above copyright 12266301Sandrew * notice, this list of conditions and the following disclaimer in the 13266301Sandrew * documentation and/or other materials provided with the distribution. 14266301Sandrew * 15266301Sandrew * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16266301Sandrew * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17266301Sandrew * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18266301Sandrew * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19266301Sandrew * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20266301Sandrew * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21266301Sandrew * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22266301Sandrew * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23266301Sandrew * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24266301Sandrew * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25266301Sandrew * SUCH DAMAGE. 26266301Sandrew * 27266301Sandrew */ 28266301Sandrew 29266301Sandrew#include <sys/cdefs.h> 30266301Sandrew__FBSDID("$FreeBSD: stable/11/sys/arm/arm/platform.c 331893 2018-04-02 23:19:07Z gonzo $"); 31266301Sandrew 32266301Sandrew/* 33266301Sandrew * Dispatch platform calls to the appropriate platform implementation 34266301Sandrew * through a previously registered kernel object. 35266301Sandrew */ 36266301Sandrew 37266301Sandrew#include <sys/param.h> 38266301Sandrew#include <sys/bus.h> 39266301Sandrew#include <sys/kernel.h> 40266301Sandrew#include <sys/lock.h> 41266301Sandrew#include <sys/ktr.h> 42266301Sandrew#include <sys/mutex.h> 43266301Sandrew#include <sys/rman.h> 44266301Sandrew#include <sys/systm.h> 45266301Sandrew#include <sys/smp.h> 46266301Sandrew#include <sys/sysctl.h> 47266301Sandrew#include <sys/types.h> 48266301Sandrew 49266301Sandrew#include <vm/vm.h> 50266301Sandrew#include <vm/vm_page.h> 51266301Sandrew 52266301Sandrew#include <machine/bus_dma.h> 53266301Sandrew#include <machine/cpu.h> 54266301Sandrew#include <machine/intr.h> 55298854Sandrew#include <machine/machdep.h> 56266301Sandrew#include <machine/md_var.h> 57266301Sandrew#include <machine/platform.h> 58266301Sandrew#include <machine/platformvar.h> 59266301Sandrew#include <machine/smp.h> 60266301Sandrew 61266301Sandrew#include "platform_if.h" 62266301Sandrew 63266301Sandrewstatic platform_def_t *plat_def_impl; 64266301Sandrewstatic platform_t plat_obj; 65266301Sandrewstatic struct kobj_ops plat_kernel_kops; 66266301Sandrewstatic struct platform_kobj plat_kernel_obj; 67266301Sandrew 68267992Shselaskystatic char plat_name[64]; 69267992ShselaskySYSCTL_STRING(_hw, OID_AUTO, platform, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, plat_name, 0, 70266301Sandrew "Platform currently in use"); 71266301Sandrew 72266301Sandrew/* 73266301Sandrew * Platform install routines. Highest priority wins, using the same 74266301Sandrew * algorithm as bus attachment. 75266301Sandrew */ 76266301SandrewSET_DECLARE(platform_set, platform_def_t); 77266301Sandrew 78298854Sandrew#ifdef MULTIDELAY 79298854Sandrewstatic delay_func platform_delay; 80298854Sandrew#endif 81298854Sandrew 82266301Sandrewvoid 83266301Sandrewplatform_probe_and_attach(void) 84266301Sandrew{ 85266301Sandrew platform_def_t **platpp, *platp; 86266301Sandrew int prio, best_prio; 87266301Sandrew 88266301Sandrew plat_obj = &plat_kernel_obj; 89266301Sandrew best_prio = 0; 90266301Sandrew 91266301Sandrew /* 92266301Sandrew * We are unable to use TUNABLE_STR as the read will happen 93266301Sandrew * well after this function has returned. 94266301Sandrew */ 95266301Sandrew TUNABLE_STR_FETCH("hw.platform", plat_name, sizeof(plat_name)); 96266301Sandrew 97266301Sandrew /* 98266301Sandrew * Try to locate the best platform kobj 99266301Sandrew */ 100266301Sandrew SET_FOREACH(platpp, platform_set) { 101266301Sandrew platp = *platpp; 102266301Sandrew 103266301Sandrew /* 104266301Sandrew * Take care of compiling the selected class, and 105266301Sandrew * then statically initialise the MMU object 106266301Sandrew */ 107298854Sandrew kobj_class_compile_static((kobj_class_t)platp, 108298854Sandrew &plat_kernel_kops); 109298854Sandrew kobj_init_static((kobj_t)plat_obj, (kobj_class_t)platp); 110266301Sandrew 111266301Sandrew plat_obj->cls = platp; 112266301Sandrew 113266301Sandrew prio = PLATFORM_PROBE(plat_obj); 114266301Sandrew 115266301Sandrew /* Check for errors */ 116266301Sandrew if (prio > 0) 117266301Sandrew continue; 118266301Sandrew 119266301Sandrew /* 120266301Sandrew * Check if this module was specifically requested through 121266301Sandrew * the loader tunable we provide. 122266301Sandrew */ 123266301Sandrew if (strcmp(platp->name,plat_name) == 0) { 124266301Sandrew plat_def_impl = platp; 125266301Sandrew break; 126266301Sandrew } 127266301Sandrew 128266301Sandrew /* Otherwise, see if it is better than our current best */ 129266301Sandrew if (plat_def_impl == NULL || prio > best_prio) { 130266301Sandrew best_prio = prio; 131266301Sandrew plat_def_impl = platp; 132266301Sandrew } 133266301Sandrew 134266301Sandrew /* 135266301Sandrew * We can't free the KOBJ, since it is static. Reset the ops 136266301Sandrew * member of this class so that we can come back later. 137266301Sandrew */ 138266301Sandrew platp->ops = NULL; 139266301Sandrew } 140266301Sandrew 141266301Sandrew if (plat_def_impl == NULL) 142266301Sandrew panic("No platform module found!"); 143266301Sandrew 144266301Sandrew /* 145266301Sandrew * Recompile to make sure we ended with the 146266301Sandrew * correct one, and then attach. 147266301Sandrew */ 148266301Sandrew 149298854Sandrew kobj_class_compile_static((kobj_class_t)plat_def_impl, 150298854Sandrew &plat_kernel_kops); 151298854Sandrew kobj_init_static((kobj_t)plat_obj, (kobj_class_t)plat_def_impl); 152266301Sandrew 153298854Sandrew strlcpy(plat_name, plat_def_impl->name, sizeof(plat_name)); 154266301Sandrew 155298854Sandrew#ifdef MULTIDELAY 156298854Sandrew /* Set a default delay function */ 157298854Sandrew arm_set_delay(platform_delay, NULL); 158298854Sandrew#endif 159298854Sandrew 160266301Sandrew PLATFORM_ATTACH(plat_obj); 161266301Sandrew} 162266301Sandrew 163266301Sandrewint 164266301Sandrewplatform_devmap_init(void) 165266301Sandrew{ 166266301Sandrew 167266301Sandrew return PLATFORM_DEVMAP_INIT(plat_obj); 168266301Sandrew} 169266301Sandrew 170266301Sandrewvm_offset_t 171266301Sandrewplatform_lastaddr(void) 172266301Sandrew{ 173266301Sandrew 174266301Sandrew return PLATFORM_LASTADDR(plat_obj); 175266301Sandrew} 176266301Sandrew 177266301Sandrewvoid 178266301Sandrewplatform_gpio_init(void) 179266301Sandrew{ 180266301Sandrew 181266301Sandrew PLATFORM_GPIO_INIT(plat_obj); 182266301Sandrew} 183266301Sandrew 184266301Sandrewvoid 185266301Sandrewplatform_late_init(void) 186266301Sandrew{ 187266301Sandrew 188266301Sandrew PLATFORM_LATE_INIT(plat_obj); 189266301Sandrew} 190266301Sandrew 191331893Sgonzovoid 192331893Sgonzocpu_reset(void) 193331893Sgonzo{ 194331893Sgonzo 195331893Sgonzo PLATFORM_CPU_RESET(plat_obj); 196331893Sgonzo 197331893Sgonzo printf("cpu_reset failed"); 198331893Sgonzo 199331893Sgonzo intr_disable(); 200331893Sgonzo while(1) { 201331893Sgonzo cpu_sleep(0); 202331893Sgonzo } 203331893Sgonzo} 204331893Sgonzo 205298854Sandrew#ifdef MULTIDELAY 206298854Sandrewstatic void 207298854Sandrewplatform_delay(int usec, void *arg __unused) 208298854Sandrew{ 209298854Sandrew int counts; 210298854Sandrew 211298854Sandrew for (; usec > 0; usec--) 212298854Sandrew for (counts = plat_obj->cls->delay_count; counts > 0; counts--) 213298854Sandrew /* 214298854Sandrew * Prevent the compiler from optimizing 215298854Sandrew * out the loop 216298854Sandrew */ 217298854Sandrew cpufunc_nullop(); 218298854Sandrew} 219298854Sandrew#endif 220298854Sandrew 221296158Sandrew#if defined(SMP) && defined(PLATFORM_SMP) 222296158Sandrewvoid 223296158Sandrewplatform_mp_setmaxid(void) 224296158Sandrew{ 225299383Smanu int ncpu; 226296158Sandrew 227296158Sandrew PLATFORM_MP_SETMAXID(plat_obj); 228299383Smanu 229299383Smanu if (TUNABLE_INT_FETCH("hw.ncpu", &ncpu)) { 230299383Smanu if (ncpu >= 1 && ncpu <= mp_ncpus) { 231299383Smanu mp_ncpus = ncpu; 232299383Smanu mp_maxid = ncpu - 1; 233299383Smanu } 234299383Smanu } 235296158Sandrew} 236296158Sandrew 237296158Sandrewvoid 238296158Sandrewplatform_mp_start_ap(void) 239296158Sandrew{ 240296158Sandrew 241296158Sandrew PLATFORM_MP_START_AP(plat_obj); 242296158Sandrew} 243296158Sandrew#endif 244