2 * Copyright (c) 2005 Peter Grehan
3 * Copyright (c) 2009 Nathan Whitehorn
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
31 * Dispatch platform calls to the appropriate platform implementation
32 * through a previously registered kernel object.
35 #include <sys/param.h>
37 #include <sys/kernel.h>
40 #include <sys/mutex.h>
42 #include <sys/systm.h>
44 #include <sys/sysctl.h>
45 #include <sys/types.h>
48 #include <vm/vm_page.h>
50 #include <machine/bus_dma.h>
51 #include <machine/cpu.h>
52 #include <machine/intr.h>
53 #include <machine/machdep.h>
54 #include <machine/md_var.h>
55 #include <machine/platform.h>
56 #include <machine/platformvar.h>
57 #include <machine/smp.h>
59 #include "platform_if.h"
61 static platform_def_t *plat_def_impl;
62 static platform_t plat_obj;
63 static struct kobj_ops plat_kernel_kops;
64 static struct platform_kobj plat_kernel_obj;
66 static char plat_name[64];
67 SYSCTL_STRING(_hw, OID_AUTO, platform, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, plat_name, 0,
68 "Platform currently in use");
71 * Platform install routines. Highest priority wins, using the same
72 * algorithm as bus attachment.
74 SET_DECLARE(platform_set, platform_def_t);
76 static delay_func platform_delay;
86 platform_probe_and_attach(void)
88 platform_def_t **platpp, *platp;
91 plat_obj = &plat_kernel_obj;
95 * We are unable to use TUNABLE_STR as the read will happen
96 * well after this function has returned.
98 TUNABLE_STR_FETCH("hw.platform", plat_name, sizeof(plat_name));
101 * Try to locate the best platform kobj
103 SET_FOREACH(platpp, platform_set) {
107 * Take care of compiling the selected class, and
108 * then statically initialise the MMU object
110 kobj_class_compile_static((kobj_class_t)platp,
112 kobj_init_static((kobj_t)plat_obj, (kobj_class_t)platp);
114 plat_obj->cls = platp;
116 prio = PLATFORM_PROBE(plat_obj);
118 /* Check for errors */
123 * Check if this module was specifically requested through
124 * the loader tunable we provide.
126 if (strcmp(platp->name,plat_name) == 0) {
127 plat_def_impl = platp;
131 /* Otherwise, see if it is better than our current best */
132 if (plat_def_impl == NULL || prio > best_prio) {
134 plat_def_impl = platp;
138 * We can't free the KOBJ, since it is static. Reset the ops
139 * member of this class so that we can come back later.
144 if (plat_def_impl == NULL)
145 panic("No platform module found!");
148 * Recompile to make sure we ended with the
149 * correct one, and then attach.
152 kobj_class_compile_static((kobj_class_t)plat_def_impl,
154 kobj_init_static((kobj_t)plat_obj, (kobj_class_t)plat_def_impl);
156 strlcpy(plat_name, plat_def_impl->name, sizeof(plat_name));
158 /* Set a default delay function */
159 arm_set_delay(platform_delay, NULL);
161 PLATFORM_ATTACH(plat_obj);
165 platform_devmap_init(void)
168 return PLATFORM_DEVMAP_INIT(plat_obj);
172 platform_lastaddr(void)
175 return PLATFORM_LASTADDR(plat_obj);
179 platform_gpio_init(void)
182 PLATFORM_GPIO_INIT(plat_obj);
186 platform_late_init(void)
189 PLATFORM_LATE_INIT(plat_obj);
196 PLATFORM_CPU_RESET(plat_obj);
198 printf("cpu_reset failed");
207 platform_delay(int usec, void *arg __unused)
211 for (; usec > 0; usec--)
212 for (counts = plat_obj->cls->delay_count; counts > 0; counts--)
214 * Prevent the compiler from optimizing
222 platform_mp_setmaxid(void)
226 PLATFORM_MP_SETMAXID(plat_obj);
228 if (TUNABLE_INT_FETCH("hw.ncpu", &ncpu)) {
229 if (ncpu >= 1 && ncpu <= mp_ncpus) {
237 platform_mp_start_ap(void)
240 PLATFORM_MP_START_AP(plat_obj);