Subversion Repositories HelenOS

Rev

Rev 403 | Rev 414 | 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>
402 jermar 33 
#include <align.h>
35 jermar 34 
 
180 jermar 35 
#define STACK_ITEM_SIZE 16
402 jermar 36 
#define STACK_ALIGNMENT 16
180 jermar 37 
 
82 jermar 38 
/*
39 
 * context_save() and context_restore() are both leaf procedures.
40 
 * No need to allocate scratch area.
180 jermar 41 
 *
42 
 * One item is put onto the stack to support get_stack_base().
82 jermar 43 
 */
180 jermar 44 
#define SP_DELTA    (0+STACK_ITEM_SIZE)
81 jermar 45 
 
97 jermar 46 
#ifdef context_set
47 
#undef context_set
48 
#endif
49 
 
402 jermar 50 
#define context_set(c, _pc, stack, size)                        \
51 
    (c)->pc = (__address) _pc;                          \
403 jermar 52 
    (c)->bsp = ((__address) stack) + ALIGN(sizeof(the_t), STACK_ALIGNMENT);     \
53 
    (c)->sp = ((__address) stack) + ALIGN((size) - SP_DELTA, STACK_ALIGNMENT);
97 jermar 54 
 
354 jermar 55 
/*
56 
 * Only save registers that must be preserved across
57 
 * function calls.
58 
 */
35 jermar 59 
struct context {
83 jermar 60 
 
82 jermar 61 
    /*
94 jermar 62 
     * Application registers
63 
     */
64 
    __u64 ar_pfs;
65 
    __u64 ar_unat_caller;
66 
    __u64 ar_unat_callee;
67 
    __u64 ar_rsc;
97 jermar 68 
    __u64 bsp;  /* ar_bsp */
94 jermar 69 
    __u64 ar_rnat;
70 
    __u64 ar_lc;
71 
 
72 
    /*
82 jermar 73 
     * General registers
74 
     */
59 jermar 75 
    __u64 r1;
76 
    __u64 r4;
77 
    __u64 r5;
78 
    __u64 r6;
79 
    __u64 r7;
80 
    __u64 sp;       /* r12 */
81 
    __u64 r13;
82 jermar 82 
 
83 
    /*
84 
     * Branch registers
85 
     */
59 jermar 86 
    __u64 pc;       /* b0 */
82 jermar 87 
    __u64 b1;
88 
    __u64 b2;
89 
    __u64 b3;
90 
    __u64 b4;
91 
    __u64 b5;
92 
 
93 
    /*
94 
     * Predicate registers
95 
     */
96 
    __u64 pr;
97 
 
413 jermar 98 
    ipl_t ipl;
59 jermar 99 
} __attribute__ ((packed));
35 jermar 100 
 
101 
#endif