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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 <arch/register.h> |
33 | #include <arch/register.h> |
34 | #include <typedefs.h> |
34 | #include <typedefs.h> |
35 | #include <align.h> |
35 | #include <align.h> |
36 | #include <arch/stack.h> |
36 | #include <arch/stack.h> |
37 | 37 | ||
38 | /* |
38 | /* |
39 | * context_save() and context_restore() are both leaf procedures. |
39 | * context_save_arch() and context_restore_arch() 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+ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
44 | #define SP_DELTA (0+ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
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 | /*RSE stack should begin under bottom of stack @ kernel*/ |
50 | /* RSE stack starts at the bottom of memory stack. */ |
51 | #define context_set(c, _pc, stack, size) \ |
51 | #define context_set(c, _pc, stack, size) \ |
- | 52 | do { \ |
|
52 | (c)->pc = (__address) _pc; \ |
53 | (c)->pc = (__address) _pc; \ |
53 | (c)->bsp = ((__address) stack) + ALIGN_UP((size), STACK_ALIGNMENT) ; \ |
54 | (c)->bsp = ((__address) stack) + ALIGN_UP((size), REGISTER_STACK_ALIGNMENT); \ |
54 | (c)->ar_pfs &= PFM_MASK; \ |
55 | (c)->ar_pfs &= PFM_MASK; \ |
55 | (c)->sp = ((__address) stack) + ALIGN_UP((size), STACK_ALIGNMENT) - SP_DELTA; |
56 | (c)->sp = ((__address) stack) + ALIGN_UP((size), STACK_ALIGNMENT) - SP_DELTA; \ |
- | 57 | } while (0); |
|
56 | 58 | ||
57 | /* |
59 | /* |
58 | * Only save registers that must be preserved across |
60 | * Only save registers that must be preserved across |
59 | * function calls. |
61 | * function calls. |
60 | */ |
62 | */ |
61 | struct context { |
63 | struct context { |
62 | 64 | ||
63 | /* |
65 | /* |
64 | * Application registers |
66 | * Application registers |
65 | */ |
67 | */ |
66 | __u64 ar_pfs; |
68 | __u64 ar_pfs; |
67 | __u64 ar_unat_caller; |
69 | __u64 ar_unat_caller; |
68 | __u64 ar_unat_callee; |
70 | __u64 ar_unat_callee; |
69 | __u64 ar_rsc; |
71 | __u64 ar_rsc; |
70 | __address bsp; /* ar_bsp */ |
72 | __address bsp; /* ar_bsp */ |
71 | __u64 ar_rnat; |
73 | __u64 ar_rnat; |
72 | __u64 ar_lc; |
74 | __u64 ar_lc; |
73 | 75 | ||
74 | /* |
76 | /* |
75 | * General registers |
77 | * General registers |
76 | */ |
78 | */ |
77 | __u64 r1; |
79 | __u64 r1; |
78 | __u64 r4; |
80 | __u64 r4; |
79 | __u64 r5; |
81 | __u64 r5; |
80 | __u64 r6; |
82 | __u64 r6; |
81 | __u64 r7; |
83 | __u64 r7; |
82 | __address sp; /* r12 */ |
84 | __address sp; /* r12 */ |
83 | __u64 r13; |
85 | __u64 r13; |
84 | 86 | ||
85 | /* |
87 | /* |
86 | * Branch registers |
88 | * Branch registers |
87 | */ |
89 | */ |
88 | __address pc; /* b0 */ |
90 | __address pc; /* b0 */ |
89 | __u64 b1; |
91 | __u64 b1; |
90 | __u64 b2; |
92 | __u64 b2; |
91 | __u64 b3; |
93 | __u64 b3; |
92 | __u64 b4; |
94 | __u64 b4; |
93 | __u64 b5; |
95 | __u64 b5; |
94 | 96 | ||
95 | /* |
97 | /* |
96 | * Predicate registers |
98 | * Predicate registers |
97 | */ |
99 | */ |
98 | __u64 pr; |
100 | __u64 pr; |
99 | 101 | ||
100 | __r128 f2 __attribute__ ((aligned(16))); |
102 | __r128 f2 __attribute__ ((aligned(16))); |
101 | __r128 f3; |
103 | __r128 f3; |
102 | __r128 f4; |
104 | __r128 f4; |
103 | __r128 f5; |
105 | __r128 f5; |
104 | 106 | ||
105 | __r128 f16; |
107 | __r128 f16; |
106 | __r128 f17; |
108 | __r128 f17; |
107 | __r128 f18; |
109 | __r128 f18; |
108 | __r128 f19; |
110 | __r128 f19; |
109 | __r128 f20; |
111 | __r128 f20; |
110 | __r128 f21; |
112 | __r128 f21; |
111 | __r128 f22; |
113 | __r128 f22; |
112 | __r128 f23; |
114 | __r128 f23; |
113 | __r128 f24; |
115 | __r128 f24; |
114 | __r128 f25; |
116 | __r128 f25; |
115 | __r128 f26; |
117 | __r128 f26; |
116 | __r128 f27; |
118 | __r128 f27; |
117 | __r128 f28; |
119 | __r128 f28; |
118 | __r128 f29; |
120 | __r128 f29; |
119 | __r128 f30; |
121 | __r128 f30; |
120 | __r128 f31; |
122 | __r128 f31; |
121 | 123 | ||
122 | ipl_t ipl; |
124 | ipl_t ipl; |
123 | }; |
125 | }; |
124 | 126 | ||
125 | - | ||
126 | - | ||
127 | #endif |
127 | #endif |
128 | 128 |