Rev 414 | Rev 443 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
35 | jermar | 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 | #ifndef __ia64_CONTEXT_H__ |
||
30 | #define __ia64_CONTEXT_H__ |
||
31 | |||
32 | #include <arch/types.h> |
||
414 | jermar | 33 | #include <typedefs.h> |
402 | jermar | 34 | #include <align.h> |
35 | jermar | 35 | |
415 | jermar | 36 | #define STACK_ITEM_SIZE 16 |
37 | #define STACK_ALIGNMENT 16 |
||
38 | #define REGISTER_STACK_ALIGNMENT 8 |
||
180 | jermar | 39 | |
82 | jermar | 40 | /* |
41 | * context_save() and context_restore() are both leaf procedures. |
||
42 | * No need to allocate scratch area. |
||
180 | jermar | 43 | * |
44 | * One item is put onto the stack to support get_stack_base(). |
||
82 | jermar | 45 | */ |
180 | jermar | 46 | #define SP_DELTA (0+STACK_ITEM_SIZE) |
81 | jermar | 47 | |
415 | jermar | 48 | #define PFM_MASK (~0x3fffffffff) |
49 | |||
97 | jermar | 50 | #ifdef context_set |
51 | #undef context_set |
||
52 | #endif |
||
53 | |||
415 | jermar | 54 | #define context_set(c, _pc, stack, size) \ |
55 | (c)->pc = (__address) _pc; \ |
||
56 | (c)->bsp = ((__address) stack) + ALIGN(sizeof(the_t), REGISTER_STACK_ALIGNMENT); \ |
||
57 | (c)->ar_pfs &= PFM_MASK; \ |
||
414 | jermar | 58 | (c)->sp = ((__address) stack) + ALIGN((size), STACK_ALIGNMENT) - SP_DELTA; |
97 | jermar | 59 | |
354 | jermar | 60 | /* |
61 | * Only save registers that must be preserved across |
||
62 | * function calls. |
||
63 | */ |
||
35 | jermar | 64 | struct context { |
83 | jermar | 65 | |
82 | jermar | 66 | /* |
94 | jermar | 67 | * Application registers |
68 | */ |
||
69 | __u64 ar_pfs; |
||
70 | __u64 ar_unat_caller; |
||
71 | __u64 ar_unat_callee; |
||
72 | __u64 ar_rsc; |
||
414 | jermar | 73 | __address bsp; /* ar_bsp */ |
94 | jermar | 74 | __u64 ar_rnat; |
75 | __u64 ar_lc; |
||
76 | |||
77 | /* |
||
82 | jermar | 78 | * General registers |
79 | */ |
||
59 | jermar | 80 | __u64 r1; |
81 | __u64 r4; |
||
82 | __u64 r5; |
||
83 | __u64 r6; |
||
84 | __u64 r7; |
||
414 | jermar | 85 | __address sp; /* r12 */ |
59 | jermar | 86 | __u64 r13; |
82 | jermar | 87 | |
88 | /* |
||
89 | * Branch registers |
||
90 | */ |
||
414 | jermar | 91 | __address pc; /* b0 */ |
82 | jermar | 92 | __u64 b1; |
93 | __u64 b2; |
||
94 | __u64 b3; |
||
95 | __u64 b4; |
||
96 | __u64 b5; |
||
97 | |||
98 | /* |
||
99 | * Predicate registers |
||
100 | */ |
||
101 | __u64 pr; |
||
102 | |||
413 | jermar | 103 | ipl_t ipl; |
59 | jermar | 104 | } __attribute__ ((packed)); |
35 | jermar | 105 | |
106 | #endif |