arm_fdt.c revision 1.7
1 /* $NetBSD: arm_fdt.c,v 1.7 2017/12/10 21:38:26 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "opt_arm_timer.h" 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: arm_fdt.c,v 1.7 2017/12/10 21:38:26 skrll Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/cpu.h> 37 #include <sys/device.h> 38 #include <sys/kmem.h> 39 #include <sys/bus.h> 40 41 #include <dev/fdt/fdtvar.h> 42 #include <dev/ofw/openfirm.h> 43 44 #include <arm/fdt/arm_fdtvar.h> 45 46 static int arm_fdt_match(device_t, cfdata_t, void *); 47 static void arm_fdt_attach(device_t, device_t, void *); 48 49 CFATTACH_DECL_NEW(arm_fdt, 0, 50 arm_fdt_match, arm_fdt_attach, NULL, NULL); 51 52 static struct arm_platlist arm_platform_list = 53 TAILQ_HEAD_INITIALIZER(arm_platform_list); 54 55 struct arm_fdt_cpu_hatch_cb { 56 TAILQ_ENTRY(arm_fdt_cpu_hatch_cb) next; 57 void (*cb)(void *, struct cpu_info *); 58 void *priv; 59 }; 60 61 static TAILQ_HEAD(, arm_fdt_cpu_hatch_cb) arm_fdt_cpu_hatch_cbs = 62 TAILQ_HEAD_INITIALIZER(arm_fdt_cpu_hatch_cbs); 63 64 static void (*_arm_fdt_irq_handler)(void *) = NULL; 65 static void (*_arm_fdt_timer_init)(void) = NULL; 66 67 int 68 arm_fdt_match(device_t parent, cfdata_t cf, void *aux) 69 { 70 return 1; 71 } 72 73 void 74 arm_fdt_attach(device_t parent, device_t self, void *aux) 75 { 76 const struct arm_platform *plat = arm_fdt_platform(); 77 struct fdt_attach_args faa; 78 79 aprint_naive("\n"); 80 aprint_normal("\n"); 81 82 plat->init_attach_args(&faa); 83 faa.faa_name = ""; 84 faa.faa_phandle = OF_peer(0); 85 86 config_found(self, &faa, NULL); 87 } 88 89 const struct arm_platform * 90 arm_fdt_platform(void) 91 { 92 static const struct arm_platform_info *booted_platform = NULL; 93 94 if (booted_platform == NULL) { 95 __link_set_decl(arm_platforms, struct arm_platform_info); 96 struct arm_platform_info * const *info; 97 const struct arm_platform_info *best_info = NULL; 98 const int phandle = OF_peer(0); 99 int match, best_match = 0; 100 101 __link_set_foreach(info, arm_platforms) { 102 const char * const compat[] = { (*info)->compat, NULL }; 103 match = of_match_compatible(phandle, compat); 104 if (match > best_match) { 105 best_match = match; 106 best_info = *info; 107 } 108 } 109 110 booted_platform = best_info; 111 } 112 113 return booted_platform == NULL ? NULL : booted_platform->ops; 114 } 115 116 void 117 arm_fdt_cpu_hatch_register(void *priv, void (*cb)(void *, struct cpu_info *)) 118 { 119 struct arm_fdt_cpu_hatch_cb *c; 120 121 c = kmem_alloc(sizeof(*c), KM_SLEEP); 122 c->priv = priv; 123 c->cb = cb; 124 TAILQ_INSERT_TAIL(&arm_fdt_cpu_hatch_cbs, c, next); 125 } 126 127 void 128 arm_fdt_cpu_hatch(struct cpu_info *ci) 129 { 130 struct arm_fdt_cpu_hatch_cb *c; 131 132 TAILQ_FOREACH(c, &arm_fdt_cpu_hatch_cbs, next) 133 c->cb(c->priv, ci); 134 } 135 136 void 137 arm_fdt_irq_set_handler(void (*irq_handler)(void *)) 138 { 139 KASSERT(_arm_fdt_irq_handler == NULL); 140 _arm_fdt_irq_handler = irq_handler; 141 } 142 143 void 144 arm_fdt_irq_handler(void *tf) 145 { 146 _arm_fdt_irq_handler(tf); 147 } 148 149 void 150 arm_fdt_timer_register(void (*timerfn)(void)) 151 { 152 if (_arm_fdt_timer_init != NULL) { 153 #ifdef DIAGNOSTIC 154 aprint_verbose("%s: timer already registered\n", __func__); 155 #endif 156 return; 157 } 158 _arm_fdt_timer_init = timerfn; 159 } 160 161 void 162 arm_fdt_memory_dump(paddr_t pa) 163 { 164 const struct arm_platform *plat = arm_fdt_platform(); 165 struct fdt_attach_args faa; 166 bus_space_tag_t bst; 167 bus_space_handle_t bsh; 168 169 plat->init_attach_args(&faa); 170 171 bst = faa.faa_bst; 172 bus_space_map(bst, pa, 0x100, 0, &bsh); 173 174 for (int i = 0; i < 0x100; i += 0x10) { 175 printf("%" PRIxPTR ": %08x %08x %08x %08x\n", 176 (uintptr_t)(pa + i), 177 bus_space_read_4(bst, bsh, i + 0), 178 bus_space_read_4(bst, bsh, i + 4), 179 bus_space_read_4(bst, bsh, i + 8), 180 bus_space_read_4(bst, bsh, i + 12)); 181 } 182 } 183 184 #ifdef __HAVE_GENERIC_CPU_INITCLOCKS 185 void 186 cpu_initclocks(void) 187 { 188 if (_arm_fdt_timer_init == NULL) 189 panic("cpu_initclocks: no timer registered"); 190 _arm_fdt_timer_init(); 191 } 192 #endif 193
Indexes created Thu Sep 25 16:09:42 GMT 2025