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Linux kernel mirror (for testing)
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linux
1/*
2 * include/asm-xtensa/coprocessor.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2003 - 2005 Tensilica Inc.
9 */
10
11#ifndef _XTENSA_COPROCESSOR_H
12#define _XTENSA_COPROCESSOR_H
13
14#include <asm/variant/core.h>
15#include <asm/variant/tie.h>
16
17#if !XCHAL_HAVE_CP
18
19#define XTENSA_CP_EXTRA_OFFSET 0
20#define XTENSA_CP_EXTRA_ALIGN 1 /* must be a power of 2 */
21#define XTENSA_CP_EXTRA_SIZE 0
22
23#else
24
25#define XTOFS(last_start,last_size,align) \
26 ((last_start+last_size+align-1) & -align)
27
28#define XTENSA_CP_EXTRA_OFFSET 0
29#define XTENSA_CP_EXTRA_ALIGN XCHAL_EXTRA_SA_ALIGN
30
31#define XTENSA_CPE_CP0_OFFSET \
32 XTOFS(XTENSA_CP_EXTRA_OFFSET, XCHAL_EXTRA_SA_SIZE, XCHAL_CP0_SA_ALIGN)
33#define XTENSA_CPE_CP1_OFFSET \
34 XTOFS(XTENSA_CPE_CP0_OFFSET, XCHAL_CP0_SA_SIZE, XCHAL_CP1_SA_ALIGN)
35#define XTENSA_CPE_CP2_OFFSET \
36 XTOFS(XTENSA_CPE_CP1_OFFSET, XCHAL_CP1_SA_SIZE, XCHAL_CP2_SA_ALIGN)
37#define XTENSA_CPE_CP3_OFFSET \
38 XTOFS(XTENSA_CPE_CP2_OFFSET, XCHAL_CP2_SA_SIZE, XCHAL_CP3_SA_ALIGN)
39#define XTENSA_CPE_CP4_OFFSET \
40 XTOFS(XTENSA_CPE_CP3_OFFSET, XCHAL_CP3_SA_SIZE, XCHAL_CP4_SA_ALIGN)
41#define XTENSA_CPE_CP5_OFFSET \
42 XTOFS(XTENSA_CPE_CP4_OFFSET, XCHAL_CP4_SA_SIZE, XCHAL_CP5_SA_ALIGN)
43#define XTENSA_CPE_CP6_OFFSET \
44 XTOFS(XTENSA_CPE_CP5_OFFSET, XCHAL_CP5_SA_SIZE, XCHAL_CP6_SA_ALIGN)
45#define XTENSA_CPE_CP7_OFFSET \
46 XTOFS(XTENSA_CPE_CP6_OFFSET, XCHAL_CP6_SA_SIZE, XCHAL_CP7_SA_ALIGN)
47#define XTENSA_CP_EXTRA_SIZE \
48 XTOFS(XTENSA_CPE_CP7_OFFSET, XCHAL_CP7_SA_SIZE, 16)
49
50#if XCHAL_CP_NUM > 0
51# ifndef __ASSEMBLY__
52/*
53 * Tasks that own contents of (last user) each coprocessor.
54 * Entries are 0 for not-owned or non-existent coprocessors.
55 * Note: The size of this structure is fixed to 8 bytes in entry.S
56 */
57typedef struct {
58 struct task_struct *owner; /* owner */
59 int offset; /* offset in cpextra space. */
60} coprocessor_info_t;
61# else
62# define COPROCESSOR_INFO_OWNER 0
63# define COPROCESSOR_INFO_OFFSET 4
64# define COPROCESSOR_INFO_SIZE 8
65# endif
66#endif
67
68
69#ifndef __ASSEMBLY__
70# if XCHAL_CP_NUM > 0
71struct task_struct;
72extern void release_coprocessors (struct task_struct*);
73extern void save_coprocessor_registers(void*, int);
74# else
75# define release_coprocessors(task)
76# endif
77#endif
78
79#endif
80
81#endif /* _XTENSA_COPROCESSOR_H */