RTEMS: cpukit/score/cpu/i386/include/rtems/asm.h Source File

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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. This file is:
24 *
25 * COPYRIGHT (c) 1994-1997.
26 * On-Line Applications Research Corporation (OAR).
27 */
28
29#ifndef _RTEMS_ASM_H
30#define _RTEMS_ASM_H
31
32/*
33 * Indicate we are in an assembly file and get the basic CPU definitions.
34 */
35
36#ifndef ASM
37#define ASM
38#endif
39#include <rtems/score/cpuopts.h>
40#include <rtems/score/i386.h>
41#include <rtems/score/percpu.h>
42
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#ifndef __USER_LABEL_PREFIX__
60#define __USER_LABEL_PREFIX__
61#endif
62
63/*
64 * Looks like there is a bug in gcc 2.6.2 where this is not
65 * defined correctly when configured as i386-coff and
66 * i386-aout.
67 */
68
69#undef __REGISTER_PREFIX__
70#define __REGISTER_PREFIX__ %
71
72/*
73#ifndef __REGISTER_PREFIX__
74#define __REGISTER_PREFIX__
75#endif
76*/
77
78#include <rtems/concat.h>
79
80/* Use the right prefix for global labels. */
81
82#define SYM(x) CONCAT0 (__USER_LABEL_PREFIX__, x)
83
84/* Use the right prefix for registers. */
85
86#define REG(x) CONCAT0 (__REGISTER_PREFIX__, x)
87
88#define eax REG (eax)
89#define ebx REG (ebx)
90#define ecx REG (ecx)
91#define edx REG (edx)
92#define esi REG (esi)
93#define edi REG (edi)
94#define esp REG (esp)
95#define ebp REG (ebp)
96#define cr0 REG (cr0)
97#define cr4 REG (cr4)
98
99#define ax REG (ax)
100#define bx REG (bx)
101#define cx REG (cx)
102#define dx REG (dx)
103#define si REG (si)
104#define di REG (di)
105#define sp REG (sp)
106#define bp REG (bp)
107
108#define ah REG (ah)
109#define bh REG (bh)
110#define ch REG (ch)
111#define dh REG (dh)
112
113#define al REG (al)
114#define bl REG (bl)
115#define cl REG (cl)
116#define dl REG (dl)
117
118#define cs REG (cs)
119#define ds REG (ds)
120#define es REG (es)
121#define fs REG (fs)
122#define gs REG (gs)
123#define ss REG (ss)
124
125/*
126 * Define macros to handle section beginning and ends.
127 */
128
129
130#define BEGIN_CODE_DCL .text
131#define END_CODE_DCL
132#define BEGIN_DATA_DCL .data
133#define END_DATA_DCL
134#define BEGIN_CODE .text
135#define END_CODE
136#define BEGIN_DATA .data
137#define END_DATA
138#define BEGIN_BSS .bss
139#define END_BSS
140#define END
141
142/*
143 * Following must be tailor for a particular flavor of the C compiler.
144 * They may need to put underscores in front of the symbols.
145 */
146
147#define PUBLIC(sym) .globl SYM (sym)
148#define EXTERN(sym) .globl SYM (sym)
149
150#ifdef RTEMS_SMP
151.macro GET_CPU_ID REG
152 .set LAPIC_ID, 0x20
153 .set LAPIC_ID_SHIFT, 0x18L
154 movl imps_lapic_addr,\REG
155 movl LAPIC_ID(\REG),\REG
156 shrl $LAPIC_ID_SHIFT,\REG /* LAPIC_ID in REG */
157 movzbl imps_apic_cpu_map(\REG),\REG /* CPU ID in REG */
158.endm
159
160.macro GET_SELF_CPU_CONTROL REG
161 GET_CPU_ID \REG
162 shll $PER_CPU_CONTROL_SIZE_LOG2,\REG /* Calculate offset for CPU structure */
163 leal _Per_CPU_Information(\REG),\REG /* Address of info for current CPU in REG */
164.endm
165#else
166.macro GET_CPU_ID REG
167 movl $0,\REG
168.endm
169
170.macro GET_SELF_CPU_CONTROL REG
171 leal _Per_CPU_Information, \REG
172.endm
173#endif
174
177#endif
concat.h
i386.h
Intel I386 CPU Dependent Source.
percpu.h
imps_lapic_addr
unsigned imps_lapic_addr
base address of the local apic. Usually 0xFEE00000
Definition: smp-imps.c:202