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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 <typedefs.h> |
33 | #include <typedefs.h> |
34 | #include <align.h> |
34 | #include <align.h> |
35 | - | ||
36 | #define STACK_ITEM_SIZE 16 |
- | |
37 | #define STACK_ALIGNMENT 16 |
35 | #include <arch/stack.h> |
38 | #define REGISTER_STACK_ALIGNMENT 8 |
- | |
39 | 36 | ||
40 | /* |
37 | /* |
41 | * context_save() and context_restore() are both leaf procedures. |
38 | * context_save() and context_restore() are both leaf procedures. |
42 | * No need to allocate scratch area. |
39 | * No need to allocate scratch area. |
43 | * |
40 | * |
44 | * One item is put onto the stack to support get_stack_base(). |
41 | * One item is put onto the stack to support get_stack_base(). |
45 | */ |
42 | */ |
46 | #define SP_DELTA (0+STACK_ITEM_SIZE) |
43 | #define SP_DELTA (0+STACK_ITEM_SIZE) |
47 | 44 | ||
48 | #define PFM_MASK (~0x3fffffffff) |
45 | #define PFM_MASK (~0x3fffffffff) |
49 | 46 | ||
50 | #ifdef context_set |
47 | #ifdef context_set |
51 | #undef context_set |
48 | #undef context_set |
52 | #endif |
49 | #endif |
53 | 50 | ||
54 | #define context_set(c, _pc, stack, size) \ |
51 | #define context_set(c, _pc, stack, size) \ |
55 | (c)->pc = (__address) _pc; \ |
52 | (c)->pc = (__address) _pc; \ |
56 | (c)->bsp = ((__address) stack) + ALIGN(sizeof(the_t), REGISTER_STACK_ALIGNMENT); \ |
53 | (c)->bsp = ((__address) stack) + ALIGN(sizeof(the_t), REGISTER_STACK_ALIGNMENT); \ |
57 | (c)->ar_pfs &= PFM_MASK; \ |
54 | (c)->ar_pfs &= PFM_MASK; \ |
58 | (c)->sp = ((__address) stack) + ALIGN((size), STACK_ALIGNMENT) - SP_DELTA; |
55 | (c)->sp = ((__address) stack) + ALIGN((size), STACK_ALIGNMENT) - SP_DELTA; |
59 | 56 | ||
60 | /* |
57 | /* |
61 | * Only save registers that must be preserved across |
58 | * Only save registers that must be preserved across |
62 | * function calls. |
59 | * function calls. |
63 | */ |
60 | */ |
64 | struct context { |
61 | struct context { |
65 | 62 | ||
66 | /* |
63 | /* |
67 | * Application registers |
64 | * Application registers |
68 | */ |
65 | */ |
69 | __u64 ar_pfs; |
66 | __u64 ar_pfs; |
70 | __u64 ar_unat_caller; |
67 | __u64 ar_unat_caller; |
71 | __u64 ar_unat_callee; |
68 | __u64 ar_unat_callee; |
72 | __u64 ar_rsc; |
69 | __u64 ar_rsc; |
73 | __address bsp; /* ar_bsp */ |
70 | __address bsp; /* ar_bsp */ |
74 | __u64 ar_rnat; |
71 | __u64 ar_rnat; |
75 | __u64 ar_lc; |
72 | __u64 ar_lc; |
76 | 73 | ||
77 | /* |
74 | /* |
78 | * General registers |
75 | * General registers |
79 | */ |
76 | */ |
80 | __u64 r1; |
77 | __u64 r1; |
81 | __u64 r4; |
78 | __u64 r4; |
82 | __u64 r5; |
79 | __u64 r5; |
83 | __u64 r6; |
80 | __u64 r6; |
84 | __u64 r7; |
81 | __u64 r7; |
85 | __address sp; /* r12 */ |
82 | __address sp; /* r12 */ |
86 | __u64 r13; |
83 | __u64 r13; |
87 | 84 | ||
88 | /* |
85 | /* |
89 | * Branch registers |
86 | * Branch registers |
90 | */ |
87 | */ |
91 | __address pc; /* b0 */ |
88 | __address pc; /* b0 */ |
92 | __u64 b1; |
89 | __u64 b1; |
93 | __u64 b2; |
90 | __u64 b2; |
94 | __u64 b3; |
91 | __u64 b3; |
95 | __u64 b4; |
92 | __u64 b4; |
96 | __u64 b5; |
93 | __u64 b5; |
97 | 94 | ||
98 | /* |
95 | /* |
99 | * Predicate registers |
96 | * Predicate registers |
100 | */ |
97 | */ |
101 | __u64 pr; |
98 | __u64 pr; |
102 | 99 | ||
103 | ipl_t ipl; |
100 | ipl_t ipl; |
104 | } __attribute__ ((packed)); |
101 | } __attribute__ ((packed)); |
105 | 102 | ||
106 | #endif |
103 | #endif |
107 | 104 |