source: rtems/cpukit/score/cpu/sparc/sparc-access.S

Last change on this file was e111974, checked in by Joel Sherrill <joel@…>, on 02/16/22 at 22:56:15

score/cpu/sparc: Change license to BSD-2

Updates #3053.
  • Property mode set to 100644
File size: 2.9 KB
Line 
1/* SPDX-License-Identifier: BSD-2-Clause */
2
3/*
4 *  Optimized access routines for SPARC.
5 *
6 *  Note the difference between byteorder.h (inlined functions) and access.S
7 *  where the functions will be declared in the library archive librtemscpu.a.
8 *  Function names starting with _ are in library and can be referenced by
9 *  function pointers.
10 *
11 *  _ldN, _stN          standard machine endianess access (SPARC: big-endian)
12 *  _ld_beN, _st_beN    forced big-endian
13 *  _ld_leN, _st_leN    forced little-endian (defined in access_le.C)
14 *
15 *  This file is written in assembly because the big-endian functions maps to
16 *  machine dependant access methods, i.e. same function has two names.
17 *
18 *  COPYRIGHT (c) 2011
19 *  Aeroflex Gaisler.
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 *    notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 *    notice, this list of conditions and the following disclaimer in the
28 *    documentation and/or other materials provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43#include <rtems/asm.h>
44
45        .align 4
46        .section ".text"
47        PUBLIC(_ld8)
48        PUBLIC(_ld16)
49        PUBLIC(_ld32)
50        PUBLIC(_ld64)
51        PUBLIC(_st8)
52        PUBLIC(_st16)
53        PUBLIC(_st32)
54        PUBLIC(_st64)
55        PUBLIC(_ld_be16)
56        PUBLIC(_ld_be32)
57        PUBLIC(_ld_be64)
58        PUBLIC(_st_be16)
59        PUBLIC(_st_be32)
60        PUBLIC(_st_be64)
61
62SYM(_ld8):
63        retl
64         ldub [%o0], %o0
65
66SYM(_ld_be16):
67SYM(_ld16):
68        retl
69         lduh [%o0], %o0
70
71SYM(_ld_be32):
72SYM(_ld32):
73        retl
74         ld [%o0], %o0
75
76SYM(_ld_be64):
77SYM(_ld64):
78        retl
79         ldd [%o0], %o0
80
81#if defined(__FIX_LEON3FT_B2BST)
82
83SYM(_st8):
84        stub %o1, [%o0]
85        retl
86         nop
87
88SYM(_st_be16):
89SYM(_st16):
90        stuh %o1, [%o0]
91        retl
92         nop
93
94SYM(_st_be32):
95SYM(_st32):
96        st %o1, [%o0]
97        retl
98         nop
99
100SYM(_st_be64):
101SYM(_st64):
102        mov %o2, %o3
103        mov %o1, %o2
104        std %o2, [%o0]
105        retl
106         nop
107
108#else
109
110SYM(_st8):
111        retl
112         stb %o1, [%o0]
113
114SYM(_st_be16):
115SYM(_st16):
116        retl
117         sth %o1, [%o0]
118
119SYM(_st_be32):
120SYM(_st32):
121        retl
122         st %o1, [%o0]
123
124SYM(_st_be64):
125SYM(_st64):
126        mov %o2, %o3
127        mov %o1, %o2
128        retl
129         std %o2, [%o0]
130#endif
Note: See TracBrowser for help on using the repository browser.