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_NATIVE_H
21#define _ASM_POWERPC_DCR_NATIVE_H
22#ifdef __KERNEL__
23#ifndef __ASSEMBLY__
24
25typedef struct {
26 unsigned int base;
27} dcr_host_t;
28
29#define DCR_MAP_OK(host) (1)
30
31#define dcr_map(dev, dcr_n, dcr_c) ((dcr_host_t){ .base = (dcr_n) })
32#define dcr_unmap(host, dcr_c) do {} while (0)
33#define dcr_read(host, dcr_n) mfdcr(dcr_n + host.base)
34#define dcr_write(host, dcr_n, value) mtdcr(dcr_n + host.base, value)
35
36/* Device Control Registers */
37void __mtdcr(int reg, unsigned int val);
38unsigned int __mfdcr(int reg);
39#define mfdcr(rn) \
40 ({unsigned int rval; \
41 if (__builtin_constant_p(rn)) \
42 asm volatile("mfdcr %0," __stringify(rn) \
43 : "=r" (rval)); \
44 else \
45 rval = __mfdcr(rn); \
46 rval;})
47
48#define mtdcr(rn, v) \
49do { \
50 if (__builtin_constant_p(rn)) \
51 asm volatile("mtdcr " __stringify(rn) ",%0" \
52 : : "r" (v)); \
53 else \
54 __mtdcr(rn, v); \
55} while (0)
56
57/* R/W of indirect DCRs make use of standard naming conventions for DCRs */
58#define mfdcri(base, reg) \
59({ \
60 mtdcr(base ## _CFGADDR, base ## _ ## reg); \
61 mfdcr(base ## _CFGDATA); \
62})
63
64#define mtdcri(base, reg, data) \
65do { \
66 mtdcr(base ## _CFGADDR, base ## _ ## reg); \
67 mtdcr(base ## _CFGDATA, data); \
68} while (0)
69
70#endif /* __ASSEMBLY__ */
71#endif /* __KERNEL__ */
72#endif /* _ASM_POWERPC_DCR_NATIVE_H */
73
74