xref: /freebsd/sys/arm/broadcom/bcm2835/bcm2835_vcbus.h (revision 642870485c089b57000fe538d3485e272b038d59)
1 /*-
2  * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28 
29 /*
30  * Defines for converting physical address to VideoCore bus address and back
31  */
32 
33 #ifndef _BCM2835_VCBUS_H_
34 #define _BCM2835_VCBUS_H_
35 
36 /*
37  * ARM64 define its SOC options in opt_soc.h
38  */
39 #if defined(__aarch64__)
40 #include "opt_soc.h"
41 #endif
42 
43 #define	BCM2835_VCBUS_SDRAM_CACHED	0x40000000
44 #define	BCM2835_VCBUS_IO_BASE		0x7E000000
45 #define	BCM2835_VCBUS_SDRAM_UNCACHED	0xC0000000
46 
47 #if defined(SOC_BCM2835)
48 #define	BCM2835_ARM_IO_BASE		0x20000000
49 #define	BCM2835_VCBUS_SDRAM_BASE	BCM2835_VCBUS_SDRAM_CACHED
50 #else
51 #define	BCM2835_ARM_IO_BASE		0x3f000000
52 #define	BCM2835_VCBUS_SDRAM_BASE	BCM2835_VCBUS_SDRAM_UNCACHED
53 #endif
54 #define	BCM2835_ARM_IO_SIZE		0x01000000
55 
56 /*
57  * Convert physical address to VC bus address. Should be used
58  * when submitting address over mailbox interface
59  */
60 #define	PHYS_TO_VCBUS(pa)	((pa) + BCM2835_VCBUS_SDRAM_BASE)
61 
62 /* Check whether pa bellong top IO window */
63 #define BCM2835_ARM_IS_IO(pa)	(((pa) >= BCM2835_ARM_IO_BASE) && \
64     ((pa) < BCM2835_ARM_IO_BASE + BCM2835_ARM_IO_SIZE))
65 
66 /*
67  * Convert physical address in IO space to VC bus address.
68  */
69 #define	IO_TO_VCBUS(pa)		((pa - BCM2835_ARM_IO_BASE) + \
70     BCM2835_VCBUS_IO_BASE)
71 
72 /*
73  * Convert address from VC bus space to physical. Should be used
74  * when address is returned by VC over mailbox interface. e.g.
75  * framebuffer base
76  */
77 #define	VCBUS_TO_PHYS(vca)	((vca) & ~(BCM2835_VCBUS_SDRAM_BASE))
78 
79 #endif /* _BCM2835_VCBUS_H_ */
80