source: mainline/kernel/arch/ia64/include/context.h@ 86018c1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 86018c1 was b3f8fb7, checked in by Martin Decky <martin@…>, 18 years ago

huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes
  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 * Copyright (c) 2005 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup ia64
30 * @{
31 */
32/** @file
33 */
34
35#ifndef KERN_ia64_CONTEXT_H_
36#define KERN_ia64_CONTEXT_H_
37
38#include <arch/types.h>
39#include <arch/register.h>
40#include <align.h>
41#include <arch/stack.h>
42
43/*
44 * context_save_arch() and context_restore_arch() are both leaf procedures.
45 * No need to allocate scratch area.
46 *
47 * One item is put onto the stack to support get_stack_base().
48 */
49#define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
50
51#ifdef context_set
52#undef context_set
53#endif
54
55/* RSE stack starts at the bottom of memory stack. */
56#define context_set(c, _pc, stack, size) \
57 do { \
58 (c)->pc = (uintptr_t) _pc; \
59 (c)->bsp = ((uintptr_t) stack) + ALIGN_UP((size), REGISTER_STACK_ALIGNMENT); \
60 (c)->ar_pfs &= PFM_MASK; \
61 (c)->sp = ((uintptr_t) stack) + ALIGN_UP((size), STACK_ALIGNMENT) - SP_DELTA; \
62 } while (0);
63
64/*
65 * Only save registers that must be preserved across
66 * function calls.
67 */
68typedef struct {
69
70 /*
71 * Application registers
72 */
73 uint64_t ar_pfs;
74 uint64_t ar_unat_caller;
75 uint64_t ar_unat_callee;
76 uint64_t ar_rsc;
77 uintptr_t bsp; /* ar_bsp */
78 uint64_t ar_rnat;
79 uint64_t ar_lc;
80
81 /*
82 * General registers
83 */
84 uint64_t r1;
85 uint64_t r4;
86 uint64_t r5;
87 uint64_t r6;
88 uint64_t r7;
89 uintptr_t sp; /* r12 */
90 uint64_t r13;
91
92 /*
93 * Branch registers
94 */
95 uintptr_t pc; /* b0 */
96 uint64_t b1;
97 uint64_t b2;
98 uint64_t b3;
99 uint64_t b4;
100 uint64_t b5;
101
102 /*
103 * Predicate registers
104 */
105 uint64_t pr;
106
107 uint128_t f2 __attribute__ ((aligned(16)));
108 uint128_t f3;
109 uint128_t f4;
110 uint128_t f5;
111
112 uint128_t f16;
113 uint128_t f17;
114 uint128_t f18;
115 uint128_t f19;
116 uint128_t f20;
117 uint128_t f21;
118 uint128_t f22;
119 uint128_t f23;
120 uint128_t f24;
121 uint128_t f25;
122 uint128_t f26;
123 uint128_t f27;
124 uint128_t f28;
125 uint128_t f29;
126 uint128_t f30;
127 uint128_t f31;
128
129 ipl_t ipl;
130} context_t;
131
132#endif
133
134/** @}
135 */
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