source: rtems/cpukit/score/cpu/sparc/rtems/asm.h @ 12d6f14

4.104.114.84.9
Last change on this file since 12d6f14 was 12d6f14, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 7, 1997 at 9:22:15 PM

added "ifndef" to avoid redefinition warning.

  • Property mode set to 100644
File size: 2.8 KB
Line 
1/*  asm.h
2 *
3 *  This include file attempts to address the problems
4 *  caused by incompatible flavors of assemblers and
5 *  toolsets.  It primarily addresses variations in the
6 *  use of leading underscores on symbols and the requirement
7 *  that register names be preceded by a %.
8 *
9 *
10 *  NOTE: The spacing in the use of these macros
11 *        is critical to them working as advertised.
12 *
13 *  COPYRIGHT:
14 *
15 *  This file is based on similar code found in newlib available
16 *  from ftp.cygnus.com.  The file which was used had no copyright
17 *  notice.  This file is freely distributable as long as the source
18 *  of the file is noted.
19 *
20 *  $Id$
21 */
22
23#ifndef __SPARC_ASM_h
24#define __SPARC_ASM_h
25
26/*
27 *  Indicate we are in an assembly file and get the basic CPU definitions.
28 */
29
30#ifndef ASM
31#define ASM
32#endif
33
34#include <rtems/score/targopts.h>
35#include <rtems/score/cpu.h>
36
37/*
38 *  Recent versions of GNU cpp define variables which indicate the
39 *  need for underscores and percents.  If not using GNU cpp or
40 *  the version does not support this, then you will obviously
41 *  have to define these as appropriate.
42 */
43
44/* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */
45/* XXX The following ifdef magic fixes the problem but results in a warning   */
46/* XXX when compiling assembly code.                                          */
47#undef  __USER_LABEL_PREFIX__
48#ifndef __USER_LABEL_PREFIX__
49#define __USER_LABEL_PREFIX__ _
50#endif
51
52#ifndef __REGISTER_PREFIX__
53#define __REGISTER_PREFIX__
54#endif
55
56/* ANSI concatenation macros.  */
57
58#define CONCAT1(a, b) CONCAT2(a, b)
59#define CONCAT2(a, b) a ## b
60
61/* Use the right prefix for global labels.  */
62
63#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
64
65/* Use the right prefix for registers.  */
66
67#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
68
69/*
70 *  define macros for all of the registers on this CPU
71 *
72 *  EXAMPLE:     #define d0 REG (d0)
73 */
74
75/*
76 *  Define macros to handle section beginning and ends.
77 */
78
79
80#define BEGIN_CODE_DCL .text
81#define END_CODE_DCL
82#define BEGIN_DATA_DCL .data
83#define END_DATA_DCL
84#define BEGIN_CODE .text
85#define END_CODE
86#define BEGIN_DATA
87#define END_DATA
88#define BEGIN_BSS
89#define END_BSS
90#define END
91
92/*
93 *  Following must be tailor for a particular flavor of the C compiler.
94 *  They may need to put underscores in front of the symbols.
95 */
96
97#define PUBLIC(sym) .globl SYM (sym)
98#define EXTERN(sym) .globl SYM (sym)
99
100/*
101 *  Entry for traps which jump to a programmer-specified trap handler.
102 */
103 
104#define TRAP(_vector, _handler)  \
105  mov   %psr, %l0 ; \
106  sethi %hi(_handler), %l4 ; \
107  jmp   %l4+%lo(_handler); \
108  mov   _vector, %l3
109
110/*
111 *  Used for the reset trap for ERC32 to avoid a supervisor instruction
112 */
113 
114#define RTRAP(_vector, _handler)  \
115  mov   %g0, %l0 ; \
116  sethi %hi(_handler), %l4 ; \
117  jmp   %l4+%lo(_handler); \
118  mov   _vector, %l3
119
120#endif
121/* end of include file */
122
123
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