tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_t;
31
32#define DCR_MAP_OK(host) ((host).token != NULL)
33
34extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
35 unsigned int dcr_c);
36extern void dcr_unmap(dcr_host_t host, unsigned int dcr_c);
37
38static inline u32 dcr_read(dcr_host_t host, unsigned int dcr_n)
39{
40 return in_be32(host.token + ((host.base + dcr_n) * host.stride));
41}
42
43static inline void dcr_write(dcr_host_t host, unsigned int dcr_n, u32 value)
44{
45 out_be32(host.token + ((host.base + dcr_n) * host.stride), value);
46}
47
48extern u64 of_translate_dcr_address(struct device_node *dev,
49 unsigned int dcr_n,
50 unsigned int *stride);
51
52#endif /* __KERNEL__ */
53#endif /* _ASM_POWERPC_DCR_MMIO_H */
54
55