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>
30 __FBSDID("$FreeBSD$");
33 * Dispatch platform calls to the appropriate platform implementation
34 * through a previously registered kernel object.
37 #define _ARM32_BUS_DMA_PRIVATE
38 #include <sys/param.h>
40 #include <sys/kernel.h>
43 #include <sys/mutex.h>
45 #include <sys/systm.h>
47 #include <sys/sysctl.h>
48 #include <sys/types.h>
51 #include <vm/vm_page.h>
53 #include <machine/bus_dma.h>
54 #include <machine/cpu.h>
55 #include <machine/intr.h>
56 #include <machine/md_var.h>
57 #include <machine/platform.h>
58 #include <machine/platformvar.h>
59 #include <machine/smp.h>
61 #include "platform_if.h"
63 static platform_def_t *plat_def_impl;
64 static platform_t plat_obj;
65 static struct kobj_ops plat_kernel_kops;
66 static struct platform_kobj plat_kernel_obj;
68 static char plat_name[64];
69 SYSCTL_STRING(_hw, OID_AUTO, platform, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, plat_name, 0,
70 "Platform currently in use");
73 * Platform install routines. Highest priority wins, using the same
74 * algorithm as bus attachment.
76 SET_DECLARE(platform_set, platform_def_t);
79 platform_probe_and_attach(void)
81 platform_def_t **platpp, *platp;
84 plat_obj = &plat_kernel_obj;
88 * We are unable to use TUNABLE_STR as the read will happen
89 * well after this function has returned.
91 TUNABLE_STR_FETCH("hw.platform", plat_name, sizeof(plat_name));
94 * Try to locate the best platform kobj
96 SET_FOREACH(platpp, platform_set) {
100 * Take care of compiling the selected class, and
101 * then statically initialise the MMU object
103 kobj_class_compile_static(platp, &plat_kernel_kops);
104 kobj_init_static((kobj_t)plat_obj, platp);
106 plat_obj->cls = platp;
108 prio = PLATFORM_PROBE(plat_obj);
110 /* Check for errors */
115 * Check if this module was specifically requested through
116 * the loader tunable we provide.
118 if (strcmp(platp->name,plat_name) == 0) {
119 plat_def_impl = platp;
123 /* Otherwise, see if it is better than our current best */
124 if (plat_def_impl == NULL || prio > best_prio) {
126 plat_def_impl = platp;
130 * We can't free the KOBJ, since it is static. Reset the ops
131 * member of this class so that we can come back later.
136 if (plat_def_impl == NULL)
137 panic("No platform module found!");
140 * Recompile to make sure we ended with the
141 * correct one, and then attach.
144 kobj_class_compile_static(plat_def_impl, &plat_kernel_kops);
145 kobj_init_static((kobj_t)plat_obj, plat_def_impl);
147 strlcpy(plat_name,plat_def_impl->name,sizeof(plat_name));
149 PLATFORM_ATTACH(plat_obj);
153 platform_devmap_init(void)
156 return PLATFORM_DEVMAP_INIT(plat_obj);
160 platform_lastaddr(void)
163 return PLATFORM_LASTADDR(plat_obj);
167 platform_gpio_init(void)
170 PLATFORM_GPIO_INIT(plat_obj);
174 platform_late_init(void)
177 PLATFORM_LATE_INIT(plat_obj);