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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
2 | * Copyright (C) 2005 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __ia64_CONTEXT_H__ |
29 | #ifndef __ia64_CONTEXT_H__ |
30 | #define __ia64_CONTEXT_H__ |
30 | #define __ia64_CONTEXT_H__ |
31 | 31 | ||
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | #include <align.h> |
33 | #include <align.h> |
34 | 34 | ||
35 | #define STACK_ITEM_SIZE 16 |
35 | #define STACK_ITEM_SIZE 16 |
36 | #define STACK_ALIGNMENT 16 |
36 | #define STACK_ALIGNMENT 16 |
37 | 37 | ||
38 | /* |
38 | /* |
39 | * context_save() and context_restore() are both leaf procedures. |
39 | * context_save() and context_restore() are both leaf procedures. |
40 | * No need to allocate scratch area. |
40 | * No need to allocate scratch area. |
41 | * |
41 | * |
42 | * One item is put onto the stack to support get_stack_base(). |
42 | * One item is put onto the stack to support get_stack_base(). |
43 | */ |
43 | */ |
44 | #define SP_DELTA (0+STACK_ITEM_SIZE) |
44 | #define SP_DELTA (0+STACK_ITEM_SIZE) |
45 | 45 | ||
46 | #ifdef context_set |
46 | #ifdef context_set |
47 | #undef context_set |
47 | #undef context_set |
48 | #endif |
48 | #endif |
49 | 49 | ||
50 | #define context_set(c, _pc, stack, size) \ |
50 | #define context_set(c, _pc, stack, size) \ |
51 | (c)->pc = (__address) _pc; \ |
51 | (c)->pc = (__address) _pc; \ |
52 | (c)->bsp = ((__address) stack) + ALIGN(sizeof(the_t), STACK_ALIGNMENT); \ |
52 | (c)->bsp = ((__address) stack) + ALIGN(sizeof(the_t), STACK_ALIGNMENT); \ |
53 | (c)->sp = ((__address) stack) + ALIGN((size) - SP_DELTA, STACK_ALIGNMENT); |
53 | (c)->sp = ((__address) stack) + ALIGN((size) - SP_DELTA, STACK_ALIGNMENT); |
54 | 54 | ||
55 | /* |
55 | /* |
56 | * Only save registers that must be preserved across |
56 | * Only save registers that must be preserved across |
57 | * function calls. |
57 | * function calls. |
58 | */ |
58 | */ |
59 | struct context { |
59 | struct context { |
60 | 60 | ||
61 | /* |
61 | /* |
62 | * Application registers |
62 | * Application registers |
63 | */ |
63 | */ |
64 | __u64 ar_pfs; |
64 | __u64 ar_pfs; |
65 | __u64 ar_unat_caller; |
65 | __u64 ar_unat_caller; |
66 | __u64 ar_unat_callee; |
66 | __u64 ar_unat_callee; |
67 | __u64 ar_rsc; |
67 | __u64 ar_rsc; |
68 | __u64 bsp; /* ar_bsp */ |
68 | __u64 bsp; /* ar_bsp */ |
69 | __u64 ar_rnat; |
69 | __u64 ar_rnat; |
70 | __u64 ar_lc; |
70 | __u64 ar_lc; |
71 | 71 | ||
72 | /* |
72 | /* |
73 | * General registers |
73 | * General registers |
74 | */ |
74 | */ |
75 | __u64 r1; |
75 | __u64 r1; |
76 | __u64 r4; |
76 | __u64 r4; |
77 | __u64 r5; |
77 | __u64 r5; |
78 | __u64 r6; |
78 | __u64 r6; |
79 | __u64 r7; |
79 | __u64 r7; |
80 | __u64 sp; /* r12 */ |
80 | __u64 sp; /* r12 */ |
81 | __u64 r13; |
81 | __u64 r13; |
82 | 82 | ||
83 | /* |
83 | /* |
84 | * Branch registers |
84 | * Branch registers |
85 | */ |
85 | */ |
86 | __u64 pc; /* b0 */ |
86 | __u64 pc; /* b0 */ |
87 | __u64 b1; |
87 | __u64 b1; |
88 | __u64 b2; |
88 | __u64 b2; |
89 | __u64 b3; |
89 | __u64 b3; |
90 | __u64 b4; |
90 | __u64 b4; |
91 | __u64 b5; |
91 | __u64 b5; |
92 | 92 | ||
93 | /* |
93 | /* |
94 | * Predicate registers |
94 | * Predicate registers |
95 | */ |
95 | */ |
96 | __u64 pr; |
96 | __u64 pr; |
97 | 97 | ||
98 | pri_t pri; |
98 | ipl_t ipl; |
99 | } __attribute__ ((packed)); |
99 | } __attribute__ ((packed)); |
100 | 100 | ||
101 | #endif |
101 | #endif |
102 | 102 |