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 
26 typedef struct {
27 	void __iomem *token;
28 	unsigned int stride;
29 	unsigned int base;
30 } dcr_host_mmio_t;
31 
32 static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host)
33 {
34 	return host.token != NULL;
35 }
36 
37 extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev,
38 				    unsigned int dcr_n,
39 				    unsigned int dcr_c);
40 extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c);
41 
42 static 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 
47 static 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