RTEMS: cpukit/score/cpu/sparc/include/rtems/asm.h Source File

| RTEMS 5.4-rc2

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asm.h
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1
17/*
18 * COPYRIGHT:
19 *
20 * This file is based on similar code found in newlib available
21 * from ftp.cygnus.com. The file which was used had no copyright
22 * notice. This file is freely distributable as long as the source
23 * of the file is noted.
24 */
25
26#ifndef _RTEMS_ASM_H
27#define _RTEMS_ASM_H
28
29/*
30 * Indicate we are in an assembly file and get the basic CPU definitions.
31 */
32
33#ifndef ASM
34#define ASM
35#endif
36
37#include <rtems/score/cpuopts.h>
38#include <rtems/score/cpu.h>
39
50/*
51 * Recent versions of GNU cpp define variables which indicate the
52 * need for underscores and percents. If not using GNU cpp or
53 * the version does not support this, then you will obviously
54 * have to define these as appropriate.
55 */
56
57/* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */
58/* XXX The following ifdef magic fixes the problem but results in a warning */
59/* XXX when compiling assembly code. */
60
61#ifndef __USER_LABEL_PREFIX__
62#define __USER_LABEL_PREFIX__ _
63#endif
64
65#ifndef __REGISTER_PREFIX__
66#define __REGISTER_PREFIX__
67#endif
68
69#include <rtems/concat.h>
70
71/* Use the right prefix for global labels. */
72
73#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
74
75/* Use the right prefix for registers. */
76
77#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
78
79/*
80 * define macros for all of the registers on this CPU
81 *
82 * EXAMPLE: #define d0 REG (d0)
83 */
84
85/*
86 * Define macros to handle section beginning and ends.
87 */
88
89
90#define BEGIN_CODE_DCL .text
91#define END_CODE_DCL
92#define BEGIN_DATA_DCL .data
93#define END_DATA_DCL
94#define BEGIN_CODE .text
95#define END_CODE
96#define BEGIN_DATA
97#define END_DATA
98#define BEGIN_BSS
99#define END_BSS
100#define END
101
102/*
103 * Following must be tailor for a particular flavor of the C compiler.
104 * They may need to put underscores in front of the symbols.
105 */
106
107#define PUBLIC(sym) .globl SYM (sym)
108#define EXTERN(sym) .globl SYM (sym)
109
110/*
111 * Entry for traps which jump to a programmer-specified trap handler.
112 */
113
114#define TRAP(_vector, _handler) \
115 mov %psr, %l0 ; \
116 sethi %hi(_handler), %l4 ; \
117 jmp %l4+%lo(_handler); \
118 mov _vector, %l3
119
120/*
121 * Used for the reset trap to avoid a supervisor instruction
122 */
123
124#define RTRAP(_vector, _handler) \
125 mov %g0, %l0 ; \
126 sethi %hi(_handler), %l4 ; \
127 jmp %l4+%lo(_handler); \
128 mov _vector, %l3
129
130#endif
131
concat.h