Initial revision

3 files changed, 383 insertions, 0 deletions

diff --git a/cpukit/score/cpu/i386/asm.h b/cpukit/score/cpu/i386/asm.h
new file mode 100644
index 0000000000..f123defcd9
--- /dev/null
+++ b/cpukit/score/cpu/i386/asm.h
@@ -0,0 +1,131 @@
+/*  asm.h
+ *
+ *  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.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  $Id$
+ */
+
+#ifndef __i386_ASM_h
+#define __i386_ASM_h
+
+/*
+ *  Indicate we are in an assembly file and get the basic CPU definitions.
+ */
+
+#define ASM
+#include <i386.h>
+
+/*
+ *  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
+*/
+
+/* ANSI concatenation macros.  */
+
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+/* Use the right prefix for global labels.  */
+
+#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+
+/* Use the right prefix for registers.  */
+
+#define REG(x) CONCAT1 (__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 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 al REG (al)
+
+#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
+#define END_DATA
+#define BEGIN_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)
+
+#endif
+/* end of include file */
+
+
diff --git a/cpukit/score/cpu/i386/cpu.c b/cpukit/score/cpu/i386/cpu.c
new file mode 100644
index 0000000000..05a836f7e3
--- /dev/null
+++ b/cpukit/score/cpu/i386/cpu.c
@@ -0,0 +1,121 @@
+/*
+ *  Intel i386 Dependent Source
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/fatal.h>
+#include <rtems/isr.h>
+#include <rtems/wkspace.h>
+
+/*  _CPU_Initialize
+ *
+ *  This routine performs processor dependent initialization.
+ *
+ *  INPUT PARAMETERS:
+ *    cpu_table       - CPU table to initialize
+ *    thread_dispatch - address of disptaching routine
+ */
+
+
+void _CPU_Initialize(
+  rtems_cpu_table  *cpu_table,
+  void      (*thread_dispatch)      /* ignored on this CPU */
+)
+{
+  register unsigned16  fp_status asm ("ax");
+  register unsigned8  *fp_context;
+
+  if ( cpu_table == NULL )
+    rtems_fatal_error_occurred( RTEMS_NOT_CONFIGURED );
+
+  _CPU_Table = *cpu_table;
+
+  /*
+   *  The following code saves a NULL i387 context which is given
+   *  to each task at start and restart time.  The following code
+   *  is based upon that provided in the i386 Programmer's
+   *  Manual and should work on any coprocessor greater than
+   *  the i80287.
+   *
+   *  NOTE: The NO RTEMS_WAIT form of the coprocessor instructions
+   *        MUST be used in case there is not a coprocessor
+   *        to wait for.
+   */
+
+  fp_status = 0xa5a5;
+  asm volatile( "fninit" );
+  asm volatile( "fnstsw %0" : "=a" (fp_status) : "0" (fp_status) );
+
+  if ( fp_status ==  0 ) {
+
+    fp_context = _CPU_Null_fp_context;
+
+    asm volatile( "fsave (%0)" : "=r" (fp_context)
+                               : "0"  (fp_context)
+                );
+  }
+}
+
+/*  _CPU_ISR_install_vector
+ *
+ *  This kernel routine installs the RTEMS handler for the
+ *  specified vector.
+ *
+ *  Input parameters:
+ *    vector      - interrupt vector number
+ *    old_handler - former ISR for this vector number
+ *    new_handler - replacement ISR for this vector number
+ *
+ *  Output parameters:  NONE
+ *
+ */
+
+void _ISR_Handler_0(), _ISR_Handler_1();
+
+#define PER_ISR_ENTRY \
+    (((unsigned32) _ISR_Handler_1 - (unsigned32) _ISR_Handler_0))
+
+#define _Interrupt_Handler_entry( _vector ) \
+   (((unsigned32)_ISR_Handler_0) + ((_vector) * PER_ISR_ENTRY))
+
+void _CPU_ISR_install_vector(
+  unsigned32  vector,
+  proc_ptr    new_handler,
+  proc_ptr   *old_handler
+)
+{
+  i386_IDT_slot idt;
+  unsigned32    unique_handler;
+
+  /* calculate the unique entry point for this vector */
+  unique_handler = _Interrupt_Handler_entry( vector );
+
+  /* build the IDT entry */
+  idt.offset_0_15      = ((unsigned32) unique_handler) & 0xffff;
+  idt.segment_selector = i386_get_cs();
+  idt.reserved         = 0x00;
+  idt.p_dpl            = 0x8e;         /* present, ISR */
+  idt.offset_16_31     = ((unsigned32) unique_handler) >> 16;
+
+  /* install the IDT entry */
+  i386_Install_idt(
+    (unsigned32) &idt,
+    _CPU_Table.interrupt_table_segment,
+    (unsigned32) _CPU_Table.interrupt_table_offset + (8 * vector)
+  );
+
+  /* "portable" part */
+  *old_handler = _ISR_Vector_table[ vector ];
+  _ISR_Vector_table[ vector ] = new_handler;
+}
diff --git a/cpukit/score/cpu/i386/rtems/asm.h b/cpukit/score/cpu/i386/rtems/asm.h
new file mode 100644
index 0000000000..f123defcd9
--- /dev/null
+++ b/cpukit/score/cpu/i386/rtems/asm.h
@@ -0,0 +1,131 @@
+/*  asm.h
+ *
+ *  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.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  $Id$
+ */
+
+#ifndef __i386_ASM_h
+#define __i386_ASM_h
+
+/*
+ *  Indicate we are in an assembly file and get the basic CPU definitions.
+ */
+
+#define ASM
+#include <i386.h>
+
+/*
+ *  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
+*/
+
+/* ANSI concatenation macros.  */
+
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+/* Use the right prefix for global labels.  */
+
+#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+
+/* Use the right prefix for registers.  */
+
+#define REG(x) CONCAT1 (__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 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 al REG (al)
+
+#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
+#define END_DATA
+#define BEGIN_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)
+
+#endif
+/* end of include file */
+
+