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/**
* @file
*
* @brief Address the Problems Caused by Incompatible Flavor of
* Assemblers and Toolsets
*
* This include file attempts to address the problems
* caused by incompatible flavors of assemblers and
* toolsets. It primarily addresses variations in the
* use of leading underscores on symbols and the requirement
* that register names be preceded by a %.
*
* NOTE: The spacing in the use of these macros
* is critical to them working as advertised.
*/
/*
* COPYRIGHT:
*
* This file is based on similar code found in newlib available
* from ftp.cygnus.com. The file which was used had no copyright
* notice. This file is freely distributable as long as the source
* of the file is noted. This file is:
*
* COPYRIGHT (c) 1994-1997.
* On-Line Applications Research Corporation (OAR).
*/
#ifndef _RTEMS_ASM_H
#define _RTEMS_ASM_H
/*
* Indicate we are in an assembly file and get the basic CPU definitions.
*/
#ifndef ASM
#define ASM
#endif
#include <rtems/score/cpuopts.h>
#include <rtems/score/i386.h>
#include <rtems/score/percpu.h>
/**
* @defgroup RTEMSScoreCPUi386ASM i386 Assembler Support
*
* @ingroup RTEMSScoreCPUi386
*
* @brief i386 Assembler Support
*/
/**@{**/
/*
* Recent versions of GNU cpp define variables which indicate the
* need for underscores and percents. If not using GNU cpp or
* the version does not support this, then you will obviously
* have to define these as appropriate.
*/
#ifndef __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__
#endif
/*
* Looks like there is a bug in gcc 2.6.2 where this is not
* defined correctly when configured as i386-coff and
* i386-aout.
*/
#undef __REGISTER_PREFIX__
#define __REGISTER_PREFIX__ %
/*
#ifndef __REGISTER_PREFIX__
#define __REGISTER_PREFIX__
#endif
*/
#include <rtems/concat.h>
/* Use the right prefix for global labels. */
#define SYM(x) CONCAT0 (__USER_LABEL_PREFIX__, x)
/* Use the right prefix for registers. */
#define REG(x) CONCAT0 (__REGISTER_PREFIX__, x)
#define eax REG (eax)
#define ebx REG (ebx)
#define ecx REG (ecx)
#define edx REG (edx)
#define esi REG (esi)
#define edi REG (edi)
#define esp REG (esp)
#define ebp REG (ebp)
#define cr0 REG (cr0)
#define cr4 REG (cr4)
#define ax REG (ax)
#define bx REG (bx)
#define cx REG (cx)
#define dx REG (dx)
#define si REG (si)
#define di REG (di)
#define sp REG (sp)
#define bp REG (bp)
#define ah REG (ah)
#define bh REG (bh)
#define ch REG (ch)
#define dh REG (dh)
#define al REG (al)
#define bl REG (bl)
#define cl REG (cl)
#define dl REG (dl)
#define cs REG (cs)
#define ds REG (ds)
#define es REG (es)
#define fs REG (fs)
#define gs REG (gs)
#define ss REG (ss)
/*
* Define macros to handle section beginning and ends.
*/
#define BEGIN_CODE_DCL .text
#define END_CODE_DCL
#define BEGIN_DATA_DCL .data
#define END_DATA_DCL
#define BEGIN_CODE .text
#define END_CODE
#define BEGIN_DATA .data
#define END_DATA
#define BEGIN_BSS .bss
#define END_BSS
#define END
/*
* Following must be tailor for a particular flavor of the C compiler.
* They may need to put underscores in front of the symbols.
*/
#define PUBLIC(sym) .globl SYM (sym)
#define EXTERN(sym) .globl SYM (sym)
#ifdef RTEMS_SMP
.macro GET_CPU_ID REG
.set LAPIC_ID, 0x20
.set LAPIC_ID_SHIFT, 0x18L
movl imps_lapic_addr,\REG
movl LAPIC_ID(\REG),\REG
shrl $LAPIC_ID_SHIFT,\REG /* LAPIC_ID in REG */
movzbl imps_apic_cpu_map(\REG),\REG /* CPU ID in REG */
.endm
.macro GET_SELF_CPU_CONTROL REG
GET_CPU_ID \REG
shll $PER_CPU_CONTROL_SIZE_LOG2,\REG /* Calculate offset for CPU structure */
leal _Per_CPU_Information(\REG),\REG /* Address of info for current CPU in REG */
.endm
#else
.macro GET_CPU_ID REG
movl $0,\REG
.endm
.macro GET_SELF_CPU_CONTROL REG
leal _Per_CPU_Information, \REG
.endm
#endif
/**@}**/
#endif
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