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