Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[pandora-kernel.git] / arch / mips / include / asm / netlogic / mips-extns.h
1 /*
2  * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
3  * reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses.  You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the NetLogic
9  * license below:
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in
19  *    the documentation and/or other materials provided with the
20  *    distribution.
21  *
22  * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33  */
34
35 #ifndef _ASM_NLM_MIPS_EXTS_H
36 #define _ASM_NLM_MIPS_EXTS_H
37
38 /*
39  * XLR and XLP interrupt request and interrupt mask registers
40  */
41 #define read_c0_eirr()          __read_64bit_c0_register($9, 6)
42 #define read_c0_eimr()          __read_64bit_c0_register($9, 7)
43 #define write_c0_eirr(val)      __write_64bit_c0_register($9, 6, val)
44
45 /*
46  * Writing EIMR in 32 bit is a special case, the lower 8 bit of the
47  * EIMR is shadowed in the status register, so we cannot save and
48  * restore status register for split read.
49  */
50 #define write_c0_eimr(val)                                              \
51 do {                                                                    \
52         if (sizeof(unsigned long) == 4) {                               \
53                 unsigned long __flags;                                  \
54                                                                         \
55                 local_irq_save(__flags);                                \
56                 __asm__ __volatile__(                                   \
57                         ".set\tmips64\n\t"                              \
58                         "dsll\t%L0, %L0, 32\n\t"                        \
59                         "dsrl\t%L0, %L0, 32\n\t"                        \
60                         "dsll\t%M0, %M0, 32\n\t"                        \
61                         "or\t%L0, %L0, %M0\n\t"                         \
62                         "dmtc0\t%L0, $9, 7\n\t"                         \
63                         ".set\tmips0"                                   \
64                         : : "r" (val));                                 \
65                 __flags = (__flags & 0xffff00ff) | (((val) & 0xff) << 8);\
66                 local_irq_restore(__flags);                             \
67         } else                                                          \
68                 __write_64bit_c0_register($9, 7, (val));                \
69 } while (0)
70
71 static inline int hard_smp_processor_id(void)
72 {
73         return __read_32bit_c0_register($15, 1) & 0x3ff;
74 }
75
76 #endif /*_ASM_NLM_MIPS_EXTS_H */