source: rtems/cpukit/score/cpu/sparc/rtems/asm.h @ b9181082

4.104.114.84.9
Last change on this file since b9181082 was b9181082, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 29, 1997 at 12:13:00 AM

Added include of targopts.h.

  • 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#define ASM
31
32#include <rtems/score/targopts.h>
33#include <rtems/score/cpu.h>
34
35/*
36 *  Recent versions of GNU cpp define variables which indicate the
37 *  need for underscores and percents.  If not using GNU cpp or
38 *  the version does not support this, then you will obviously
39 *  have to define these as appropriate.
40 */
41
42/* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */
43/* XXX The following ifdef magic fixes the problem but results in a warning   */
44/* XXX when compiling assembly code.                                          */
45#undef  __USER_LABEL_PREFIX__
46#ifndef __USER_LABEL_PREFIX__
47#define __USER_LABEL_PREFIX__ _
48#endif
49
50#ifndef __REGISTER_PREFIX__
51#define __REGISTER_PREFIX__
52#endif
53
54/* ANSI concatenation macros.  */
55
56#define CONCAT1(a, b) CONCAT2(a, b)
57#define CONCAT2(a, b) a ## b
58
59/* Use the right prefix for global labels.  */
60
61#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
62
63/* Use the right prefix for registers.  */
64
65#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
66
67/*
68 *  define macros for all of the registers on this CPU
69 *
70 *  EXAMPLE:     #define d0 REG (d0)
71 */
72
73/*
74 *  Define macros to handle section beginning and ends.
75 */
76
77
78#define BEGIN_CODE_DCL .text
79#define END_CODE_DCL
80#define BEGIN_DATA_DCL .data
81#define END_DATA_DCL
82#define BEGIN_CODE .text
83#define END_CODE
84#define BEGIN_DATA
85#define END_DATA
86#define BEGIN_BSS
87#define END_BSS
88#define END
89
90/*
91 *  Following must be tailor for a particular flavor of the C compiler.
92 *  They may need to put underscores in front of the symbols.
93 */
94
95#define PUBLIC(sym) .globl SYM (sym)
96#define EXTERN(sym) .globl SYM (sym)
97
98/*
99 *  Entry for traps which jump to a programmer-specified trap handler.
100 */
101 
102#define TRAP(_vector, _handler)  \
103  mov   %psr, %l0 ; \
104  sethi %hi(_handler), %l4 ; \
105  jmp   %l4+%lo(_handler); \
106  mov   _vector, %l3
107
108/*
109 *  Used for the reset trap for ERC32 to avoid a supervisor instruction
110 */
111 
112#define RTRAP(_vector, _handler)  \
113  mov   %g0, %l0 ; \
114  sethi %hi(_handler), %l4 ; \
115  jmp   %l4+%lo(_handler); \
116  mov   _vector, %l3
117
118#endif
119/* end of include file */
120
121
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