bcm2835_vcbus.h revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, 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 * $FreeBSD: stable/11/sys/arm/broadcom/bcm2835/bcm2835_vcbus.h 330897 2018-03-14 03:19:51Z eadler $
29 */
30
31/*
32 * Defines for converting physical address to VideoCore bus address and back
33 */
34
35#ifndef _BCM2835_VCBUS_H_
36#define _BCM2835_VCBUS_H_
37
38#define	BCM2835_VCBUS_SDRAM_CACHED	0x40000000
39#define	BCM2835_VCBUS_IO_BASE		0x7E000000
40#define	BCM2835_VCBUS_SDRAM_UNCACHED	0xC0000000
41
42#ifdef SOC_BCM2836
43#define	BCM2835_ARM_IO_BASE		0x3f000000
44#define	BCM2835_VCBUS_SDRAM_BASE	BCM2835_VCBUS_SDRAM_UNCACHED
45#else
46#define	BCM2835_ARM_IO_BASE		0x20000000
47#define	BCM2835_VCBUS_SDRAM_BASE	BCM2835_VCBUS_SDRAM_CACHED
48#endif
49#define	BCM2835_ARM_IO_SIZE		0x01000000
50
51/*
52 * Convert physical address to VC bus address. Should be used
53 * when submitting address over mailbox interface
54 */
55#define	PHYS_TO_VCBUS(pa)	((pa) + BCM2835_VCBUS_SDRAM_BASE)
56
57/* Check whether pa bellong top IO window */
58#define BCM2835_ARM_IS_IO(pa)	(((pa) >= BCM2835_ARM_IO_BASE) && \
59    ((pa) < BCM2835_ARM_IO_BASE + BCM2835_ARM_IO_SIZE))
60
61/*
62 * Convert physical address in IO space to VC bus address.
63 */
64#define	IO_TO_VCBUS(pa)		((pa - BCM2835_ARM_IO_BASE) + \
65    BCM2835_VCBUS_IO_BASE)
66
67/*
68 * Convert address from VC bus space to physical. Should be used
69 * when address is returned by VC over mailbox interface. e.g.
70 * framebuffer base
71 */
72#define	VCBUS_TO_PHYS(vca)	((vca) & ~(BCM2835_VCBUS_SDRAM_BASE))
73
74#endif /* _BCM2835_VCBUS_H_ */
75