RTEMS 6.3
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asm.h
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1
18
19/*
20 * COPYRIGHT:
21 *
22 * This file is based on similar code found in newlib available
23 * from ftp.cygnus.com. The file which was used had no copyright
24 * notice. This file is freely distributable as long as the source
25 * of the file is noted.
26 */
27
28#ifndef _RTEMS_ASM_H
29#define _RTEMS_ASM_H
30
31/*
32 * Indicate we are in an assembly file and get the basic CPU definitions.
33 */
34
35#ifndef ASM
36#define ASM
37#endif
38
39#include <rtems/score/cpuopts.h>
40#include <rtems/score/cpu.h>
41
51
52/*
53 * Recent versions of GNU cpp define variables which indicate the
54 * need for underscores and percents. If not using GNU cpp or
55 * the version does not support this, then you will obviously
56 * have to define these as appropriate.
57 */
58
59/* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */
60/* XXX The following ifdef magic fixes the problem but results in a warning */
61/* XXX when compiling assembly code. */
62
63#ifndef __USER_LABEL_PREFIX__
64#define __USER_LABEL_PREFIX__ _
65#endif
66
67#ifndef __REGISTER_PREFIX__
68#define __REGISTER_PREFIX__
69#endif
70
71/* Use the right prefix for global labels. */
72
73#define SYM(x) RTEMS_XCONCAT(__USER_LABEL_PREFIX__, x)
74
75/* Use the right prefix for registers. */
76
77#define REG(x) RTEMS_XCONCAT(__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
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