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
dcr_map_ok_mmio(dcr_host_mmio_t host)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
dcr_read_mmio(dcr_host_mmio_t host,unsigned int dcr_n)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
dcr_write_mmio(dcr_host_mmio_t host,unsigned int dcr_n,u32 value)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 extern u64 of_translate_dcr_address(struct device_node *dev,
55 unsigned int dcr_n,
56 unsigned int *stride);
57
58 #endif /* __KERNEL__ */
59 #endif /* _ASM_POWERPC_DCR_MMIO_H */
60
61
62