xref: /freebsd/sys/arm/broadcom/bcm2835/bcm2835_machdep.c (revision 8d20be1e22095c27faf8fe8b2f0d089739cc742e)
1 /*-
2  * Copyright (c) 2012 Oleksandr Tymoshenko.
3  * Copyright (c) 1994-1998 Mark Brinicombe.
4  * Copyright (c) 1994 Brini.
5  * All rights reserved.
6  *
7  * This code is derived from software written for Brini by Mark Brinicombe
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  *    must display the following acknowledgement:
19  *      This product includes software developed by Brini.
20  * 4. The name of the company nor the name of the author may be used to
21  *    endorse or promote products derived from this software without specific
22  *    prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
25  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
37  */
38 
39 #include "opt_ddb.h"
40 #include "opt_platform.h"
41 #include "opt_global.h"
42 
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45 
46 #define _ARM32_BUS_DMA_PRIVATE
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/bus.h>
50 
51 #include <vm/vm.h>
52 #include <vm/pmap.h>
53 
54 #include <machine/bus.h>
55 #include <machine/machdep.h>
56 
57 #include <dev/fdt/fdt_common.h>
58 
59 #include <arm/broadcom/bcm2835/bcm2835_wdog.h>
60 
61 /* Start of address space used for bootstrap map */
62 #define DEVMAP_BOOTSTRAP_MAP_START	0xE0000000
63 
64 vm_offset_t
65 initarm_lastaddr(void)
66 {
67 
68 	return (DEVMAP_BOOTSTRAP_MAP_START);
69 }
70 
71 void
72 initarm_gpio_init(void)
73 {
74 }
75 
76 void
77 initarm_late_init(void)
78 {
79 	phandle_t system;
80 	pcell_t cells[2];
81 	int len;
82 
83 	system = OF_finddevice("/system");
84 	if (system != 0) {
85 		len = OF_getprop(system, "linux,serial", &cells, sizeof(cells));
86 		if (len > 0)
87 			board_set_serial(fdt64_to_cpu(*((uint64_t *)cells)));
88 
89 		len = OF_getprop(system, "linux,revision", &cells, sizeof(cells));
90 		if (len > 0)
91 			board_set_revision(fdt32_to_cpu(*((uint32_t *)cells)));
92 	}
93 }
94 
95 #define FDT_DEVMAP_MAX	(2)		// FIXME
96 static struct pmap_devmap fdt_devmap[FDT_DEVMAP_MAX] = {
97 	{ 0, 0, 0, 0, 0, }
98 };
99 
100 
101 /*
102  * Construct pmap_devmap[] with DT-derived config data.
103  */
104 int
105 platform_devmap_init(void)
106 {
107 	int i = 0;
108 
109 	fdt_devmap[i].pd_va = 0xf2000000;
110 	fdt_devmap[i].pd_pa = 0x20000000;
111 	fdt_devmap[i].pd_size = 0x01000000;       /* 1 MB */
112 	fdt_devmap[i].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
113 	fdt_devmap[i].pd_cache = PTE_DEVICE;
114 	i++;
115 
116 	pmap_devmap_bootstrap_table = &fdt_devmap[0];
117 	return (0);
118 }
119 
120 struct arm32_dma_range *
121 bus_dma_get_range(void)
122 {
123 
124 	return (NULL);
125 }
126 
127 int
128 bus_dma_get_range_nb(void)
129 {
130 
131 	return (0);
132 }
133 
134 void
135 cpu_reset()
136 {
137 	bcmwd_watchdog_reset();
138 	while (1);
139 }
140 
141