1/*
2 * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
3 *                    <benh@kernel.crashing.org>
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#ifndef _ASM_POWERPC_DCR_MMIO_H
21#define _ASM_POWERPC_DCR_MMIO_H
22#ifdef __KERNEL__
23
24#include <asm/io.h>
25
26typedef struct {
27	void __iomem *token;
28	unsigned int stride;
29	unsigned int base;
30} dcr_host_mmio_t;
31
32static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host)
33{
34	return host.token != NULL;
35}
36
37extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev,
38				    unsigned int dcr_n,
39				    unsigned int dcr_c);
40extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c);
41
42static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n)
43{
44	return in_be32(host.token + ((host.base + dcr_n) * host.stride));
45}
46
47static inline void dcr_write_mmio(dcr_host_mmio_t host,
48				  unsigned int dcr_n,
49				  u32 value)
50{
51	out_be32(host.token + ((host.base + dcr_n) * host.stride), value);
52}
53
54#endif /* __KERNEL__ */
55#endif /* _ASM_POWERPC_DCR_MMIO_H */
56
57
58