OpenCores
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    /or1k/trunk/rtems-20020807/doc/supplements/mips64orion
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Rev 1028 → Rev 1765

/Makefile.in
0,0 → 1,601
# Makefile.in generated by automake 1.6.2 from Makefile.am.
# @configure_input@
 
# Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
# Free Software Foundation, Inc.
# This Makefile.in is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.
 
@SET_MAKE@
 
#
# COPYRIGHT (c) 1988-2002.
# On-Line Applications Research Corporation (OAR).
# All rights reserved.
#
# Makefile.am,v 1.7 2002/03/28 00:53:52 joel Exp
#
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timeBSP.texi
 
 
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$(PROJECT).pdf: $(PROJECT).texi $($(PROJECT)_TEXINFOS) $(PDF_IMAGES)
 
rtems_header.html: $(top_srcdir)/rtems_header.html.in version.texi
@sed -e s%\.\./images/%$(top_builddir)/images/%g \
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< $< > $@
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@sed -e s%\.\./images/%$(top_builddir)/%g \
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< $< > $@
 
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$(TEXI2WWW) $(TEXI2WWW_ARGS) -base $(PROJECT) $<
 
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@TEXI2PDF_TRUE@@USE_PDF_TRUE@.texi.pdf:
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@TEXI2PDF_TRUE@@USE_PDF_TRUE@ $(TEXI2PDF) -q -I $(srcdir) -I $(top_srcdir) $<
 
#
# Chapters which get automatic processing
#
 
$(srcdir)/cpumodel.texi: cpumodel.t
$(BMENU2) -p "Preface" \
-u "Top" \
-n "Calling Conventions" < $< > $@
 
$(srcdir)/callconv.texi: callconv.t
$(BMENU2) -p "CPU Model Dependent Features Another Optional Feature" \
-u "Top" \
-n "Memory Model" < $< > $@
 
$(srcdir)/memmodel.texi: memmodel.t
$(BMENU2) -p "Calling Conventions User-Provided Routines" \
-u "Top" \
-n "Interrupt Processing" < $< > $@
 
# Interrupt Chapter:
# 1. Replace Times and Sizes
# 2. Build Node Structure
$(srcdir)/intr.texi: intr_NOTIMES.t BSP_TIMES
${REPLACE2} -p $(srcdir)/BSP_TIMES $(srcdir)/intr_NOTIMES.t | \
$(BMENU2) -p "Memory Model Flat Memory Model" \
-u "Top" \
-n "Default Fatal Error Processing" > $@
 
$(srcdir)/fatalerr.texi: fatalerr.t
$(BMENU2) -p "Interrupt Processing Interrupt Stack" \
-u "Top" \
-n "Board Support Packages" < $< > $@
 
$(srcdir)/bsp.texi: bsp.t
$(BMENU2) -p "Default Fatal Error Processing Default Fatal Error Handler Operations" \
-u "Top" \
-n "Processor Dependent Information Table" < $< > $@
 
$(srcdir)/cputable.texi: cputable.t
$(BMENU2) -p "Board Support Packages Processor Initialization" \
-u "Top" \
-n "Memory Requirements" < $< > $@
 
# Worksheets Chapter:
# 1. Copy the Shared File
# 2. Replace Times and Sizes
# 3. Build Node Structure
 
$(srcdir)/wksheets.texi: $(top_srcdir)/common/wksheets.t BSP_TIMES
${REPLACE2} -p $(srcdir)/BSP_TIMES \
$(top_srcdir)/common/wksheets.t | \
$(BMENU2) -p "Processor Dependent Information Table CPU Dependent Information Table" \
-u "Top" \
-n "Timing Specification" > $@
 
# Timing Specification Chapter:
# 1. Copy the Shared File
# 3. Build Node Structure
 
$(srcdir)/timing.texi: $(top_srcdir)/common/timing.t
$(BMENU2) -p "Memory Requirements RTEMS RAM Workspace Worksheet" \
-u "Top" \
-n "BSP_FOR_TIMES Timing Data" < $< > $@
 
# Timing Data for BSP Chapter:
# 1. Copy the Shared File
# 2. Replace Times and Sizes
# 3. Build Node Structure
 
$(srcdir)/timeBSP.texi: $(top_srcdir)/common/timetbl.t timeBSP.t
cat $(srcdir)/timeBSP.t $(top_srcdir)/common/timetbl.t >timeBSP_.t
@echo >>timeBSP_.t
@echo "@tex" >>timeBSP_.t
@echo "\\global\\advance \\smallskipamount by 4pt" >>timeBSP_.t
@echo "@end tex" >>timeBSP_.t
${REPLACE2} -p $(srcdir)/BSP_TIMES timeBSP_.t | \
$(BMENU2) -p "Timing Specification Terminology" \
-u "Top" \
-n "Command and Variable Index" > $@
# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:
/stamp-vti
0,0 → 1,4
@set UPDATED 17 January 2002
@set UPDATED-MONTH January 2002
@set EDITION ss-20020717
@set VERSION ss-20020717
/BSP_TIMES
0,0 → 1,247
#
# CPU MODEL/BSP Timing and Size Information
#
# BSP_TIMES,v 1.2 2002/01/17 21:47:46 joel Exp
#
 
#
# CPU Model Information
#
RTEMS_BSP BSPFORTIMES
RTEMS_CPU_MODEL BSP_CPU_MODEL
#
# Interrupt Latency
#
# NOTE: In general, the text says it is hand-calculated to be
# RTEMS_MAXIMUM_DISABLE_PERIOD at RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
# Mhz and this was last calculated for Release
# RTEMS_VERSION_FOR_MAXIMUM_DISABLE_PERIOD.
#
RTEMS_MAXIMUM_DISABLE_PERIOD TBD
RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ 20
RTEMS_RELEASE_FOR_MAXIMUM_DISABLE_PERIOD 4.0.0
#
# Context Switch Times
#
RTEMS_NO_FP_CONTEXTS 35
RTEMS_RESTORE_1ST_FP_TASK 39
RTEMS_SAVE_INIT_RESTORE_INIT 66
RTEMS_SAVE_IDLE_RESTORE_INIT 66
RTEMS_SAVE_IDLE_RESTORE_IDLE 68
#
# Task Manager Times
#
RTEMS_TASK_CREATE_ONLY 148
RTEMS_TASK_IDENT_ONLY 350
RTEMS_TASK_START_ONLY 76
RTEMS_TASK_RESTART_CALLING_TASK 95
RTEMS_TASK_RESTART_SUSPENDED_RETURNS_TO_CALLER 89
RTEMS_TASK_RESTART_BLOCKED_RETURNS_TO_CALLER 124
RTEMS_TASK_RESTART_READY_RETURNS_TO_CALLER 92
RTEMS_TASK_RESTART_SUSPENDED_PREEMPTS_CALLER 125
RTEMS_TASK_RESTART_BLOCKED_PREEMPTS_CALLER 149
RTEMS_TASK_RESTART_READY_PREEMPTS_CALLER 142
RTEMS_TASK_DELETE_CALLING_TASK 170
RTEMS_TASK_DELETE_SUSPENDED_TASK 138
RTEMS_TASK_DELETE_BLOCKED_TASK 143
RTEMS_TASK_DELETE_READY_TASK 144
RTEMS_TASK_SUSPEND_CALLING_TASK 71
RTEMS_TASK_SUSPEND_RETURNS_TO_CALLER 43
RTEMS_TASK_RESUME_TASK_READIED_RETURNS_TO_CALLER 45
RTEMS_TASK_RESUME_TASK_READIED_PREEMPTS_CALLER 67
RTEMS_TASK_SET_PRIORITY_OBTAIN_CURRENT_PRIORITY 31
RTEMS_TASK_SET_PRIORITY_RETURNS_TO_CALLER 64
RTEMS_TASK_SET_PRIORITY_PREEMPTS_CALLER 106
RTEMS_TASK_MODE_OBTAIN_CURRENT_MODE 14
RTEMS_TASK_MODE_NO_RESCHEDULE 16
RTEMS_TASK_MODE_RESCHEDULE_RETURNS_TO_CALLER 23
RTEMS_TASK_MODE_RESCHEDULE_PREEMPTS_CALLER 60
RTEMS_TASK_GET_NOTE_ONLY 33
RTEMS_TASK_SET_NOTE_ONLY 33
RTEMS_TASK_WAKE_AFTER_YIELD_RETURNS_TO_CALLER 16
RTEMS_TASK_WAKE_AFTER_YIELD_PREEMPTS_CALLER 56
RTEMS_TASK_WAKE_WHEN_ONLY 117
#
# Interrupt Manager
#
RTEMS_INTR_ENTRY_RETURNS_TO_NESTED 12
RTEMS_INTR_ENTRY_RETURNS_TO_INTERRUPTED_TASK 9
RTEMS_INTR_ENTRY_RETURNS_TO_PREEMPTING_TASK 9
RTEMS_INTR_EXIT_RETURNS_TO_NESTED <1
RTEMS_INTR_EXIT_RETURNS_TO_INTERRUPTED_TASK 8
RTEMS_INTR_EXIT_RETURNS_TO_PREEMPTING_TASK 54
#
# Clock Manager
#
RTEMS_CLOCK_SET_ONLY 86
RTEMS_CLOCK_GET_ONLY 1
RTEMS_CLOCK_TICK_ONLY 17
#
# Timer Manager
#
RTEMS_TIMER_CREATE_ONLY 28
RTEMS_TIMER_IDENT_ONLY 343
RTEMS_TIMER_DELETE_INACTIVE 43
RTEMS_TIMER_DELETE_ACTIVE 47
RTEMS_TIMER_FIRE_AFTER_INACTIVE 58
RTEMS_TIMER_FIRE_AFTER_ACTIVE 61
RTEMS_TIMER_FIRE_WHEN_INACTIVE 88
RTEMS_TIMER_FIRE_WHEN_ACTIVE 88
RTEMS_TIMER_RESET_INACTIVE 54
RTEMS_TIMER_RESET_ACTIVE 58
RTEMS_TIMER_CANCEL_INACTIVE 31
RTEMS_TIMER_CANCEL_ACTIVE 34
#
# Semaphore Manager
#
RTEMS_SEMAPHORE_CREATE_ONLY 60
RTEMS_SEMAPHORE_IDENT_ONLY 367
RTEMS_SEMAPHORE_DELETE_ONLY 58
RTEMS_SEMAPHORE_OBTAIN_AVAILABLE 38
RTEMS_SEMAPHORE_OBTAIN_NOT_AVAILABLE_NO_WAIT 38
RTEMS_SEMAPHORE_OBTAIN_NOT_AVAILABLE_CALLER_BLOCKS 109
RTEMS_SEMAPHORE_RELEASE_NO_WAITING_TASKS 44
RTEMS_SEMAPHORE_RELEASE_TASK_READIED_RETURNS_TO_CALLER 66
RTEMS_SEMAPHORE_RELEASE_TASK_READIED_PREEMPTS_CALLER 87
#
# Message Manager
#
RTEMS_MESSAGE_QUEUE_CREATE_ONLY 200
RTEMS_MESSAGE_QUEUE_IDENT_ONLY 341
RTEMS_MESSAGE_QUEUE_DELETE_ONLY 80
RTEMS_MESSAGE_QUEUE_SEND_NO_WAITING_TASKS 97
RTEMS_MESSAGE_QUEUE_SEND_TASK_READIED_RETURNS_TO_CALLER 101
RTEMS_MESSAGE_QUEUE_SEND_TASK_READIED_PREEMPTS_CALLER 123
RTEMS_MESSAGE_QUEUE_URGENT_NO_WAITING_TASKS 96
RTEMS_MESSAGE_QUEUE_URGENT_TASK_READIED_RETURNS_TO_CALLER 101
RTEMS_MESSAGE_QUEUE_URGENT_TASK_READIED_PREEMPTS_CALLER 123
RTEMS_MESSAGE_QUEUE_BROADCAST_NO_WAITING_TASKS 53
RTEMS_MESSAGE_QUEUE_BROADCAST_TASK_READIED_RETURNS_TO_CALLER 111
RTEMS_MESSAGE_QUEUE_BROADCAST_TASK_READIED_PREEMPTS_CALLER 133
RTEMS_MESSAGE_QUEUE_RECEIVE_AVAILABLE 79
RTEMS_MESSAGE_QUEUE_RECEIVE_NOT_AVAILABLE_NO_WAIT 43
RTEMS_MESSAGE_QUEUE_RECEIVE_NOT_AVAILABLE_CALLER_BLOCKS 114
RTEMS_MESSAGE_QUEUE_FLUSH_NO_MESSAGES_FLUSHED 29
RTEMS_MESSAGE_QUEUE_FLUSH_MESSAGES_FLUSHED 39
#
# Event Manager
#
RTEMS_EVENT_SEND_NO_TASK_READIED 24
RTEMS_EVENT_SEND_TASK_READIED_RETURNS_TO_CALLER 60
RTEMS_EVENT_SEND_TASK_READIED_PREEMPTS_CALLER 84
RTEMS_EVENT_RECEIVE_OBTAIN_CURRENT_EVENTS 1
RTEMS_EVENT_RECEIVE_AVAILABLE 28
RTEMS_EVENT_RECEIVE_NOT_AVAILABLE_NO_WAIT 23
RTEMS_EVENT_RECEIVE_NOT_AVAILABLE_CALLER_BLOCKS 84
#
# Signal Manager
#
RTEMS_SIGNAL_CATCH_ONLY 15
RTEMS_SIGNAL_SEND_RETURNS_TO_CALLER 37
RTEMS_SIGNAL_SEND_SIGNAL_TO_SELF 55
RTEMS_SIGNAL_EXIT_ASR_OVERHEAD_RETURNS_TO_CALLING_TASK 37
RTEMS_SIGNAL_EXIT_ASR_OVERHEAD_RETURNS_TO_PREEMPTING_TASK 54
#
# Partition Manager
#
RTEMS_PARTITION_CREATE_ONLY 70
RTEMS_PARTITION_IDENT_ONLY 341
RTEMS_PARTITION_DELETE_ONLY 42
RTEMS_PARTITION_GET_BUFFER_AVAILABLE 35
RTEMS_PARTITION_GET_BUFFER_NOT_AVAILABLE 33
RTEMS_PARTITION_RETURN_BUFFER_ONLY 43
#
# Region Manager
#
RTEMS_REGION_CREATE_ONLY 63
RTEMS_REGION_IDENT_ONLY 348
RTEMS_REGION_DELETE_ONLY 39
RTEMS_REGION_GET_SEGMENT_AVAILABLE 52
RTEMS_REGION_GET_SEGMENT_NOT_AVAILABLE_NO_WAIT 49
RTEMS_REGION_GET_SEGMENT_NOT_AVAILABLE_CALLER_BLOCKS 123
RTEMS_REGION_RETURN_SEGMENT_NO_WAITING_TASKS 54
RTEMS_REGION_RETURN_SEGMENT_TASK_READIED_RETURNS_TO_CALLER 114
RTEMS_REGION_RETURN_SEGMENT_TASK_READIED_PREEMPTS_CALLER 136
#
# Dual-Ported Memory Manager
#
RTEMS_PORT_CREATE_ONLY 35
RTEMS_PORT_IDENT_ONLY 340
RTEMS_PORT_DELETE_ONLY 39
RTEMS_PORT_INTERNAL_TO_EXTERNAL_ONLY 26
RTEMS_PORT_EXTERNAL_TO_INTERNAL_ONLY 27
#
# IO Manager
#
RTEMS_IO_INITIALIZE_ONLY 4
RTEMS_IO_OPEN_ONLY 2
RTEMS_IO_CLOSE_ONLY 1
RTEMS_IO_READ_ONLY 2
RTEMS_IO_WRITE_ONLY 3
RTEMS_IO_CONTROL_ONLY 2
#
# Rate Monotonic Manager
#
RTEMS_RATE_MONOTONIC_CREATE_ONLY 32
RTEMS_RATE_MONOTONIC_IDENT_ONLY 341
RTEMS_RATE_MONOTONIC_CANCEL_ONLY 39
RTEMS_RATE_MONOTONIC_DELETE_ACTIVE 51
RTEMS_RATE_MONOTONIC_DELETE_INACTIVE 48
RTEMS_RATE_MONOTONIC_PERIOD_INITIATE_PERIOD_RETURNS_TO_CALLER 54
RTEMS_RATE_MONOTONIC_PERIOD_CONCLUDE_PERIOD_CALLER_BLOCKS 74
RTEMS_RATE_MONOTONIC_PERIOD_OBTAIN_STATUS 31
#
# Size Information
#
#
# xxx alloted for numbers
#
RTEMS_DATA_SPACE 723
RTEMS_MINIMUM_CONFIGURATION 18,980
RTEMS_MAXIMUM_CONFIGURATION 36,438
# x,xxx alloted for numbers
RTEMS_CORE_CODE_SIZE 12,674
RTEMS_INITIALIZATION_CODE_SIZE 970
RTEMS_TASK_CODE_SIZE 3,562
RTEMS_INTERRUPT_CODE_SIZE 54
RTEMS_CLOCK_CODE_SIZE 334
RTEMS_TIMER_CODE_SIZE 1,110
RTEMS_SEMAPHORE_CODE_SIZE 1,632
RTEMS_MESSAGE_CODE_SIZE 1,754
RTEMS_EVENT_CODE_SIZE 1,000
RTEMS_SIGNAL_CODE_SIZE 418
RTEMS_PARTITION_CODE_SIZE 1,164
RTEMS_REGION_CODE_SIZE 1,494
RTEMS_DPMEM_CODE_SIZE 724
RTEMS_IO_CODE_SIZE 686
RTEMS_FATAL_ERROR_CODE_SIZE 24
RTEMS_RATE_MONOTONIC_CODE_SIZE 1,212
RTEMS_MULTIPROCESSING_CODE_SIZE 6.952
# xxx alloted for numbers
RTEMS_TIMER_CODE_OPTSIZE 184
RTEMS_SEMAPHORE_CODE_OPTSIZE 172
RTEMS_MESSAGE_CODE_OPTSIZE 288
RTEMS_EVENT_CODE_OPTSIZE 56
RTEMS_SIGNAL_CODE_OPTSIZE 56
RTEMS_PARTITION_CODE_OPTSIZE 132
RTEMS_REGION_CODE_OPTSIZE 160
RTEMS_DPMEM_CODE_OPTSIZE 132
RTEMS_IO_CODE_OPTSIZE 00
RTEMS_RATE_MONOTONIC_CODE_OPTSIZE 184
RTEMS_MULTIPROCESSING_CODE_OPTSIZE 332
# xxx alloted for numbers
RTEMS_BYTES_PER_TASK 400
RTEMS_BYTES_PER_TIMER 68
RTEMS_BYTES_PER_SEMAPHORE 124
RTEMS_BYTES_PER_MESSAGE_QUEUE 148
RTEMS_BYTES_PER_REGION 144
RTEMS_BYTES_PER_PARTITION 56
RTEMS_BYTES_PER_PORT 36
RTEMS_BYTES_PER_PERIOD 36
RTEMS_BYTES_PER_EXTENSION 64
RTEMS_BYTES_PER_FP_TASK 332
RTEMS_BYTES_PER_NODE 48
RTEMS_BYTES_PER_GLOBAL_OBJECT 20
RTEMS_BYTES_PER_PROXY 124
# x,xxx alloted for numbers
RTEMS_BYTES_OF_FIXED_SYSTEM_REQUIREMENTS 8,872
/bsp.t
0,0 → 1,93
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c bsp.t,v 1.3 2002/01/17 21:47:46 joel Exp
@c
 
@chapter Board Support Packages
 
@section Introduction
 
An RTEMS Board Support Package (BSP) must be designed
to support a particular processor and target board combination.
This chapter presents a discussion of XXX specific BSP
issues. For more information on developing a BSP, refer to the
chapter titled Board Support Packages in the RTEMS
Applications User's Guide.
 
@section System Reset
 
An RTEMS based application is initiated or
re-initiated when the XXX processor is reset. When the
XXX is reset, the processor performs the following actions:
 
@itemize @bullet
@item The tracing bits of the status register are cleared to
disable tracing.
 
@item The supervisor interrupt state is entered by setting the
supervisor (S) bit and clearing the master/interrupt (M) bit of
the status register.
 
@item The interrupt mask of the status register is set to
level 7 to effectively disable all maskable interrupts.
 
@item The vector base register (VBR) is set to zero.
 
@item The cache control register (CACR) is set to zero to
disable and freeze the processor cache.
 
@item The interrupt stack pointer (ISP) is set to the value
stored at vector 0 (bytes 0-3) of the exception vector table
(EVT).
 
@item The program counter (PC) is set to the value stored at
vector 1 (bytes 4-7) of the EVT.
 
@item The processor begins execution at the address stored in
the PC.
@end itemize
 
@section Processor Initialization
 
The address of the application's initialization code
should be stored in the first vector of the EVT which will allow
the immediate vectoring to the application code. If the
application requires that the VBR be some value besides zero,
then it should be set to the required value at this point. All
tasks share the same XXX's VBR value. Because interrupts
are enabled automatically by RTEMS as part of the initialize
executive directive, the VBR MUST be set before this directive
is invoked to insure correct interrupt vectoring. If processor
caching is to be utilized, then it should be enabled during the
reset application initialization code.
 
In addition to the requirements described in the
Board Support Packages chapter of the Applications User's
Manual for the reset code which is executed before the call to
initialize executive, the XXX version has the following
specific requirements:
 
@itemize @bullet
@item Must leave the S bit of the status register set so that
the XXX remains in the supervisor state.
 
@item Must set the M bit of the status register to remove the
XXX from the interrupt state.
 
@item Must set the master stack pointer (MSP) such that a
minimum stack size of MINIMUM_STACK_SIZE bytes is provided for
the initialize executive directive.
 
@item Must initialize the XXX's vector table.
@end itemize
 
Note that the BSP is not responsible for allocating
or installing the interrupt stack. RTEMS does this
automatically as part of initialization. If the BSP does not
install an interrupt stack and -- for whatever reason -- an
interrupt occurs before initialize_executive is invoked, then
the results are unpredictable.
 
/ChangeLog
0,0 → 1,19
2002-07-30 Joel Sherrill <joel@OARcorp.com>
 
* intr_NOTIMES.t, timeBSP.t: Replaced XXX's with real info.
 
2002-03-27 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
 
* Makefile.am: Remove AUTOMAKE_OPTIONS.
 
2002-01-18 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
 
* Makefile.am: Require automake-1.5.
 
2001-01-17 Joel Sherrill <joel@OARcorp.com>
 
* .cvsignore: Added rtems_header.html and rtems_footer.html.
 
2000-08-10 Joel Sherrill <joel@OARcorp.com>
 
* ChangeLog: New file.
/version.texi
0,0 → 1,4
@set UPDATED 17 January 2002
@set UPDATED-MONTH January 2002
@set EDITION ss-20020717
@set VERSION ss-20020717
/memmodel.t
0,0 → 1,39
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c memmodel.t,v 1.3 2002/01/17 21:47:46 joel Exp
@c
 
@chapter Memory Model
 
@section Introduction
 
A processor may support any combination of memory
models ranging from pure physical addressing to complex demand
paged virtual memory systems. RTEMS supports a flat memory
model which ranges contiguously over the processor's allowable
address space. RTEMS does not support segmentation or virtual
memory of any kind. The appropriate memory model for RTEMS
provided by the targeted processor and related characteristics
of that model are described in this chapter.
 
@section Flat Memory Model
 
The XXX family supports a flat 32-bit address
space with addresses ranging from 0x00000000 to 0xFFFFFFFF (4
gigabytes). Each address is represented by a 32-bit value and
is byte addressable. The address may be used to reference a
single byte, word (2-bytes), or long word (4 bytes). Memory
accesses within this address space are performed in big endian
fashion by the processors in this family.
 
Some of the XXX family members such as the
XXX, XXX, and XXX support virtual memory and
segmentation. The XXX requires external hardware support
such as the XXX Paged Memory Management Unit coprocessor
which is typically used to perform address translations for
these systems. RTEMS does not support virtual memory or
segmentation on any of the XXX family members.
 
/mips64orion.texi
0,0 → 1,113
\input texinfo @c -*-texinfo-*-
@c %**start of header
@setfilename mips64orion
@setcontentsaftertitlepage
@syncodeindex vr fn
@synindex ky cp
@paragraphindent 0
@c %**end of header
 
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c mips64orion.texi,v 1.9 2002/01/17 21:47:46 joel Exp
@c
 
@c
@c Master file for the Template Applications Supplement
@c
 
@include version.texi
@include common/setup.texi
 
@ifset use-ascii
@dircategory RTEMS Target Supplements
@direntry
* RTEMS MIPS64 Orion Applications Supplement: (mips64orion).
@end direntry
@end ifset
 
@c
@c Title Page Stuff
@c
 
@c
@c I don't really like having a short title page. --joel
@c
@c @shorttitlepage RTEMS MIPS64 Orion Applications Supplement
 
@setchapternewpage odd
@settitle RTEMS MIPS64 Orion Applications Supplement
@titlepage
@finalout
 
@title RTEMS MIPS64 Orion Applications Supplement
@subtitle Edition @value{EDITION}, for RTEMS @value{VERSION}
@sp 1
@subtitle @value{UPDATED}
@author On-Line Applications Research Corporation
@page
 
@include common/cpright.texi
@end titlepage
 
@c This prevents a black box from being printed on "overflow" lines.
@c The alternative is to rework a sentence to avoid this problem.
 
@include preface.texi
@include cpumodel.texi
@include callconv.texi
@include memmodel.texi
@include intr.texi
@include fatalerr.texi
@include bsp.texi
@include cputable.texi
@include wksheets.texi
@include timing.texi
@include timeBSP.texi
@ifinfo
@node Top, Preface, (dir), (dir)
@top mips64orion
 
This is the online version of the RTEMS MIPS64 Orion Applications Supplement.
 
@menu
* Preface::
* CPU Model Dependent Features::
* Calling Conventions::
* Memory Model::
* Interrupt Processing::
* Default Fatal Error Processing::
* Board Support Packages::
* Processor Dependent Information Table::
* Memory Requirements::
* Timing Specification::
* BSP_FOR_TIMES Timing Data::
* Command and Variable Index::
* Concept Index::
@end menu
 
@end ifinfo
@c
@c
@c Need to copy the emacs stuff and "trailer stuff" (index, toc) into here
@c
 
@node Command and Variable Index, Concept Index, BSP_FOR_TIMES Timing Data Rate Monotonic Manager, Top
@unnumbered Command and Variable Index
 
There are currently no Command and Variable Index entries.
 
@c @printindex fn
 
@node Concept Index, , Command and Variable Index, Top
@unnumbered Concept Index
 
There are currently no Concept Index entries.
@c @printindex cp
 
@contents
@bye
 
/cputable.t
0,0 → 1,109
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c cputable.t,v 1.3 2002/01/17 21:47:46 joel Exp
@c
 
@chapter Processor Dependent Information Table
 
@section Introduction
 
Any highly processor dependent information required
to describe a processor to RTEMS is provided in the CPU
Dependent Information Table. This table is not required for all
processors supported by RTEMS. This chapter describes the
contents, if any, for a particular processor type.
 
@section CPU Dependent Information Table
 
The XXX version of the RTEMS CPU Dependent
Information Table contains the information required to interface
a Board Support Package and RTEMS on the XXX. This
information is provided to allow RTEMS to interoperate
effectively with the BSP. The C structure definition is given
here:
 
@example
@group
typedef struct @{
void (*pretasking_hook)( void );
void (*predriver_hook)( void );
void (*postdriver_hook)( void );
void (*idle_task)( void );
boolean do_zero_of_workspace;
unsigned32 idle_task_stack_size;
unsigned32 interrupt_stack_size;
unsigned32 extra_mpci_receive_server_stack;
void * (*stack_allocate_hook)( unsigned32 );
void (*stack_free_hook)( void* );
/* end of fields required on all CPUs */
 
/* XXX CPU family dependent stuff */
@} rtems_cpu_table;
@end group
@end example
 
@table @code
@item pretasking_hook
is the address of the user provided routine which is invoked
once RTEMS APIs are initialized. This routine will be invoked
before any system tasks are created. Interrupts are disabled.
This field may be NULL to indicate that the hook is not utilized.
 
@item predriver_hook
is the address of the user provided
routine that is invoked immediately before the
the device drivers and MPCI are initialized. RTEMS
initialization is complete but interrupts and tasking are disabled.
This field may be NULL to indicate that the hook is not utilized.
 
@item postdriver_hook
is the address of the user provided
routine that is invoked immediately after the
the device drivers and MPCI are initialized. RTEMS
initialization is complete but interrupts and tasking are disabled.
This field may be NULL to indicate that the hook is not utilized.
 
@item idle_task
is the address of the optional user
provided routine which is used as the system's IDLE task. If
this field is not NULL, then the RTEMS default IDLE task is not
used. This field may be NULL to indicate that the default IDLE
is to be used.
 
@item do_zero_of_workspace
indicates whether RTEMS should
zero the Workspace as part of its initialization. If set to
TRUE, the Workspace is zeroed. Otherwise, it is not.
 
@item idle_task_stack_size
is the size of the RTEMS idle task stack in bytes.
If this number is less than MINIMUM_STACK_SIZE, then the
idle task's stack will be MINIMUM_STACK_SIZE in byte.
 
@item interrupt_stack_size
is the size of the RTEMS
allocated interrupt stack in bytes. This value must be at least
as large as MINIMUM_STACK_SIZE.
 
@item extra_mpci_receive_server_stack
is the extra stack space allocated for the RTEMS MPCI receive server task
in bytes. The MPCI receive server may invoke nearly all directives and
may require extra stack space on some targets.
 
@item stack_allocate_hook
is the address of the optional user provided routine which allocates
memory for task stacks. If this hook is not NULL, then a stack_free_hook
must be provided as well.
 
@item stack_free_hook
is the address of the optional user provided routine which frees
memory for task stacks. If this hook is not NULL, then a stack_allocate_hook
must be provided as well.
 
@item XXX
is where the CPU family dependent stuff goes.
 
@end table
/fatalerr.t
0,0 → 1,31
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c fatalerr.t,v 1.3 2002/01/17 21:47:46 joel Exp
@c
 
@chapter Default Fatal Error Processing
 
@section Introduction
 
Upon detection of a fatal error by either the
application or RTEMS the fatal error manager is invoked. The
fatal error manager will invoke the user-supplied fatal error
handlers. If no user-supplied handlers are configured, the
RTEMS provided default fatal error handler is invoked. If the
user-supplied fatal error handlers return to the executive the
default fatal error handler is then invoked. This chapter
describes the precise operations of the default fatal error
handler.
 
@section Default Fatal Error Handler Operations
 
The default fatal error handler which is invoked by
the @code{rtems_fatal_error_occurred} directive when there is
no user handler configured or the user handler returns control to
RTEMS. The default fatal error handler disables processor interrupts,
places the error code in @b{XXX}, and executes a @code{XXX}
instruction to simulate a halt processor instruction.
 
/callconv.t
0,0 → 1,92
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c callconv.t,v 1.3 2002/01/17 21:47:46 joel Exp
@c
 
@chapter Calling Conventions
 
@section Introduction
 
Each high-level language compiler generates
subroutine entry and exit code based upon a set of rules known
as the compiler's calling convention. These rules address the
following issues:
 
@itemize @bullet
@item register preservation and usage
@item parameter passing
@item call and return mechanism
@end itemize
 
A compiler's calling convention is of importance when
interfacing to subroutines written in another language either
assembly or high-level. Even when the high-level language and
target processor are the same, different compilers may use
different calling conventions. As a result, calling conventions
are both processor and compiler dependent.
 
@section Processor Background
 
The MC68xxx architecture supports a simple yet
effective call and return mechanism. A subroutine is invoked
via the branch to subroutine (@code{XXX}) or the jump to subroutine
(@code{XXX}) instructions. These instructions push the return address
on the current stack. The return from subroutine (@code{XXX})
instruction pops the return address off the current stack and
transfers control to that instruction. It is is important to
note that the XXX call and return mechanism does not
automatically save or restore any registers. It is the
responsibility of the high-level language compiler to define the
register preservation and usage convention.
 
@section Calling Mechanism
 
All RTEMS directives are invoked using either a @code{XXX}
or @code{XXX} instruction and return to the user application via the
@code{XXX} instruction.
 
@section Register Usage
 
As discussed above, the @code{XXX} and @code{XXX} instructions do
not automatically save any registers. RTEMS uses the registers
@b{D0}, @b{D1}, @b{A0}, and @b{A1} as scratch registers. These registers are
not preserved by RTEMS directives therefore, the contents of
these registers should not be assumed upon return from any RTEMS
directive.
 
@section Parameter Passing
 
RTEMS assumes that arguments are placed on the
current stack before the directive is invoked via the @code{XXX} or @code{XXX}
instruction. The first argument is assumed to be closest to the
return address on the stack. This means that the first argument
of the C calling sequence is pushed last. The following
pseudo-code illustrates the typical sequence used to call a
RTEMS directive with three (3) arguments:
 
@example
@group
push third argument
push second argument
push first argument
invoke directive
remove arguments from the stack
@end group
@end example
 
The arguments to RTEMS are typically pushed onto the
stack using a move instruction with a pre-decremented stack
pointer as the destination. These arguments must be removed
from the stack after control is returned to the caller. This
removal is typically accomplished by adding the size of the
argument list in bytes to the current stack pointer.
 
@section User-Provided Routines
 
All user-provided routines invoked by RTEMS, such as
user extensions, device drivers, and MPCI routines, must also
adhere to these calling conventions.
 
/timeBSP.t
0,0 → 1,112
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c timeBSP.t,v 1.5 2002/07/31 00:16:43 joel Exp
@c
 
@include common/timemac.texi
@tex
\global\advance \smallskipamount by -4pt
@end tex
 
@chapter BSP_FOR_TIMES Timing Data
 
@section Introduction
 
The timing data for the XXX version of RTEMS is
provided along with the target dependent aspects concerning the
gathering of the timing data. The hardware platform used to
gather the times is described to give the reader a better
understanding of each directive time provided. Also, provided
is a description of the interrupt latency and the context switch
times as they pertain to the XXX version of RTEMS.
 
@section Hardware Platform
 
All times reported except for the maximum period
interrupts are disabled by RTEMS were measured using a Motorola
BSP_FOR_TIMES CPU board. The BSP_FOR_TIMES is a RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
Mhz board with one wait
state dynamic memory and a XXX numeric coprocessor. The
Zilog 8036 countdown timer on this board was used to measure
elapsed time with a one-half microsecond resolution. All
sources of hardware interrupts were disabled, although the
interrupt level of the XXX allows all interrupts.
 
The maximum period interrupts are disabled was
measured by summing the number of CPU cycles required by each
assembly language instruction executed while interrupts were
disabled. The worst case times of the XXX microprocessor
were used for each instruction. Zero wait state memory was
assumed. The total CPU cycles executed with interrupts
disabled, including the instructions to disable and enable
interrupts, was divided by 20 to simulate a RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
Mhz processor. It
should be noted that the worst case instruction times for the
XXX assume that the internal cache is disabled and that no
instructions overlap.
 
@section Interrupt Latency
 
The maximum period with interrupts disabled within
RTEMS is less than RTEMS_MAXIMUM_DISABLE_PERIOD
microseconds including the instructions
which disable and re-enable interrupts. The time required for
the mips64orion to vector an interrupt and for the RTEMS entry
overhead before invoking the user's interrupt handler are a
total of RTEMS_INTR_ENTRY_RETURNS_TO_PREEMPTING_TASK
microseconds. These combine to yield a worst case
interrupt latency of less than
RTEMS_MAXIMUM_DISABLE_PERIOD + RTEMS_INTR_ENTRY_RETURNS_TO_PREEMPTING_TASK
microseconds at RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
Mhz. [NOTE: The maximum period with interrupts
disabled was last determined for Release
RTEMS_RELEASE_FOR_MAXIMUM_DISABLE_PERIOD.]
 
It should be noted again that the maximum period with
interrupts disabled within RTEMS is hand-timed and based upon
worst case (i.e. CPU cache disabled and no instruction overlap)
times for a RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
Mhz processor. The interrupt vector and entry
overhead time was generated on an BSP_FOR_TIMES benchmark platform
using the Multiprocessing Communications registers to generate
as the interrupt source.
 
@section Context Switch
 
The RTEMS processor context switch time is RTEMS_NO_FP_CONTEXTS
microseconds on the BSP_FOR_TIMES benchmark platform when no floating
point context is saved or restored. Additional execution time
is required when a TASK_SWITCH user extension is configured.
The use of the TASK_SWITCH extension is application dependent.
Thus, its execution time is not considered part of the raw
context switch time.
 
Since RTEMS was designed specifically for embedded
missile applications which are floating point intensive, the
executive is optimized to avoid unnecessarily saving and
restoring the state of the numeric coprocessor. The state of
the numeric coprocessor is only saved when an FLOATING_POINT
task is dispatched and that task was not the last task to
utilize the coprocessor. In a system with only one
FLOATING_POINT task, the state of the numeric coprocessor will
never be saved or restored. When the first FLOATING_POINT task
is dispatched, RTEMS does not need to save the current state of
the numeric coprocessor.
 
The exact amount of time required to save and restore
floating point context is dependent on whether an XXX or
XXX is being used as well as the state of the numeric
coprocessor. These numeric coprocessors define three operating
states: initialized, idle, and busy. RTEMS places the
coprocessor in the initialized state when a task is started or
restarted. Once the task has utilized the coprocessor, it is in
the idle state when floating point instructions are not
executing and the busy state when floating point instructions
are executing. The state of the coprocessor is task specific.
 
The following table summarizes the context switch
times for the BSP_FOR_TIMES benchmark platform:
 
/Makefile.am
0,0 → 1,110
#
# COPYRIGHT (c) 1988-2002.
# On-Line Applications Research Corporation (OAR).
# All rights reserved.
#
# Makefile.am,v 1.7 2002/03/28 00:53:52 joel Exp
#
 
 
PROJECT = mips64orion
EDITION = 1
 
include $(top_srcdir)/project.am
include $(top_srcdir)/supplements/supplement.am
 
GENERATED_FILES = cpumodel.texi callconv.texi memmodel.texi intr.texi \
fatalerr.texi bsp.texi cputable.texi wksheets.texi timing.texi \
timeBSP.texi
 
COMMON_FILES = $(top_srcdir)/common/setup.texi \
$(top_srcdir)/common/cpright.texi $(top_srcdir)/common/timemac.texi
 
FILES = preface.texi
 
info_TEXINFOS = mips64orion.texi
mips64orion_TEXINFOS = $(FILES) $(COMMON_FILES) $(GENERATED_FILES)
 
#
# Chapters which get automatic processing
#
 
$(srcdir)/cpumodel.texi: cpumodel.t
$(BMENU2) -p "Preface" \
-u "Top" \
-n "Calling Conventions" < $< > $@
 
$(srcdir)/callconv.texi: callconv.t
$(BMENU2) -p "CPU Model Dependent Features Another Optional Feature" \
-u "Top" \
-n "Memory Model" < $< > $@
 
$(srcdir)/memmodel.texi: memmodel.t
$(BMENU2) -p "Calling Conventions User-Provided Routines" \
-u "Top" \
-n "Interrupt Processing" < $< > $@
 
# Interrupt Chapter:
# 1. Replace Times and Sizes
# 2. Build Node Structure
$(srcdir)/intr.texi: intr_NOTIMES.t BSP_TIMES
${REPLACE2} -p $(srcdir)/BSP_TIMES $(srcdir)/intr_NOTIMES.t | \
$(BMENU2) -p "Memory Model Flat Memory Model" \
-u "Top" \
-n "Default Fatal Error Processing" > $@
 
$(srcdir)/fatalerr.texi: fatalerr.t
$(BMENU2) -p "Interrupt Processing Interrupt Stack" \
-u "Top" \
-n "Board Support Packages" < $< > $@
 
$(srcdir)/bsp.texi: bsp.t
$(BMENU2) -p "Default Fatal Error Processing Default Fatal Error Handler Operations" \
-u "Top" \
-n "Processor Dependent Information Table" < $< > $@
 
$(srcdir)/cputable.texi: cputable.t
$(BMENU2) -p "Board Support Packages Processor Initialization" \
-u "Top" \
-n "Memory Requirements" < $< > $@
 
# Worksheets Chapter:
# 1. Copy the Shared File
# 2. Replace Times and Sizes
# 3. Build Node Structure
 
$(srcdir)/wksheets.texi: $(top_srcdir)/common/wksheets.t BSP_TIMES
${REPLACE2} -p $(srcdir)/BSP_TIMES \
$(top_srcdir)/common/wksheets.t | \
$(BMENU2) -p "Processor Dependent Information Table CPU Dependent Information Table" \
-u "Top" \
-n "Timing Specification" > $@
 
# Timing Specification Chapter:
# 1. Copy the Shared File
# 3. Build Node Structure
 
$(srcdir)/timing.texi: $(top_srcdir)/common/timing.t
$(BMENU2) -p "Memory Requirements RTEMS RAM Workspace Worksheet" \
-u "Top" \
-n "BSP_FOR_TIMES Timing Data" < $< > $@
 
# Timing Data for BSP Chapter:
# 1. Copy the Shared File
# 2. Replace Times and Sizes
# 3. Build Node Structure
 
$(srcdir)/timeBSP.texi: $(top_srcdir)/common/timetbl.t timeBSP.t
cat $(srcdir)/timeBSP.t $(top_srcdir)/common/timetbl.t >timeBSP_.t
@echo >>timeBSP_.t
@echo "@tex" >>timeBSP_.t
@echo "\\global\\advance \\smallskipamount by 4pt" >>timeBSP_.t
@echo "@end tex" >>timeBSP_.t
${REPLACE2} -p $(srcdir)/BSP_TIMES timeBSP_.t | \
$(BMENU2) -p "Timing Specification Terminology" \
-u "Top" \
-n "Command and Variable Index" > $@
CLEANFILES += timeBSP_.t
 
EXTRA_DIST = BSP_TIMES bsp.t callconv.t cpumodel.t cputable.t fatalerr.t \
intr_NOTIMES.t memmodel.t timeBSP.t
/cpumodel.t
0,0 → 1,68
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c cpumodel.t,v 1.3 2002/01/17 21:47:46 joel Exp
@c
 
@chapter CPU Model Dependent Features
 
@section Introduction
 
Microprocessors are generally classified into
families with a variety of CPU models or implementations within
that family. Within a processor family, there is a high level
of binary compatibility. This family may be based on either an
architectural specification or on maintaining compatibility with
a popular processor. Recent microprocessor families such as the
SPARC or PA-RISC are based on an architectural specification
which is independent or any particular CPU model or
implementation. Older families such as the M68xxx and the iX86
evolved as the manufacturer strived to produce higher
performance processor models which maintained binary
compatibility with older models.
 
RTEMS takes advantage of the similarity of the
various models within a CPU family. Although the models do vary
in significant ways, the high level of compatibility makes it
possible to share the bulk of the CPU dependent executive code
across the entire family. Each processor family supported by
RTEMS has a list of features which vary between CPU models
within a family. For example, the most common model dependent
feature regardless of CPU family is the presence or absence of a
floating point unit or coprocessor. When defining the list of
features present on a particular CPU model, one simply notes
that floating point hardware is or is not present and defines a
single constant appropriately. Conditional compilation is
utilized to include the appropriate source code for this CPU
model's feature set. It is important to note that this means
that RTEMS is thus compiled using the appropriate feature set
and compilation flags optimal for this CPU model used. The
alternative would be to generate a binary which would execute on
all family members using only the features which were always
present.
 
This chapter presents the set of features which vary
across SPARC implementations and are of importance to RTEMS.
The set of CPU model feature macros are defined in the file
c/src/exec/score/cpu/XXX/XXX.h based upon the particular CPU
model defined on the compilation command line.
 
@section CPU Model Name
 
The macro CPU_MODEL_NAME is a string which designates
the name of this CPU model. For example, for the MODEL
processor, this macro is set to the string "XXX".
 
@section Floating Point Unit
 
The macro XXX_HAS_FPU is set to 1 to indicate that
this CPU model has a hardware floating point unit and 0
otherwise. It does not matter whether the hardware floating
point support is incorporated on-chip or is an external
coprocessor.
 
@section Another Optional Feature
 
The macro XXX
/intr_NOTIMES.t
0,0 → 1,196
@c
@c Interrupt Stack Frame Picture
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c intr_NOTIMES.t,v 1.4 2002/07/31 00:16:43 joel Exp
@c
 
@chapter Interrupt Processing
 
@section Introduction
 
Different types of processors respond to the
occurrence of an interrupt in its own unique fashion. In
addition, each processor type provides a control mechanism to
allow for the proper handling of an interrupt. The processor
dependent response to the interrupt modifies the current
execution state and results in a change in the execution stream.
Most processors require that an interrupt handler utilize some
special control mechanisms to return to the normal processing
stream. Although RTEMS hides many of the processor dependent
details of interrupt processing, it is important to understand
how the RTEMS interrupt manager is mapped onto the processor's
unique architecture. Discussed in this chapter are the XXX's
interrupt response and control mechanisms as they pertain to
RTEMS.
 
@section Vectoring of an Interrupt Handler
 
Depending on whether or not the particular CPU
supports a separate interrupt stack, the XXX family has two
different interrupt handling models.
 
@subsection Models Without Separate Interrupt Stacks
 
Upon receipt of an interrupt the XXX family
members without separate interrupt stacks automatically perform
the following actions:
 
@itemize @bullet
@item To Be Written
@end itemize
 
@subsection Models With Separate Interrupt Stacks
 
Upon receipt of an interrupt the XXX family
members with separate interrupt stacks automatically perform the
following actions:
 
@itemize @bullet
@item saves the current status register (SR),
 
@item clears the master/interrupt (M) bit of the SR to
indicate the switch from master state to interrupt state,
 
@item sets the privilege mode to supervisor,
 
@item suppresses tracing,
 
@item sets the interrupt mask level equal to the level of the
interrupt being serviced,
 
@item pushes an interrupt stack frame (ISF), which includes
the program counter (PC), the status register (SR), and the
format/exception vector offset (FVO) word, onto the supervisor
and interrupt stacks,
 
@item switches the current stack to the interrupt stack and
vectors to an interrupt service routine (ISR). If the ISR was
installed with the interrupt_catch directive, then the RTEMS
interrupt handler will begin execution. The RTEMS interrupt
handler saves all registers which are not preserved according to
the calling conventions and invokes the application's ISR.
@end itemize
 
A nested interrupt is processed similarly by these
CPU models with the exception that only a single ISF is placed
on the interrupt stack and the current stack need not be
switched.
 
The FVO word in the Interrupt Stack Frame is examined
by RTEMS to determine when an outer most interrupt is being
exited. Since the FVO is used by RTEMS for this purpose, the
user application code MUST NOT modify this field.
 
The following shows the Interrupt Stack Frame for
XXX CPU models with separate interrupt stacks:
 
@ifset use-ascii
@example
@group
+----------------------+
| Status Register | 0x0
+----------------------+
| Program Counter High | 0x2
+----------------------+
| Program Counter Low | 0x4
+----------------------+
| Format/Vector Offset | 0x6
+----------------------+
@end group
@end example
@end ifset
 
@ifset use-tex
@sp 1
@tex
\centerline{\vbox{\offinterlineskip\halign{
\strut\vrule#&
\hbox to 2.00in{\enskip\hfil#\hfil}&
\vrule#&
\hbox to 0.50in{\enskip\hfil#\hfil}
\cr
\multispan{3}\hrulefill\cr
& Status Register && 0x0\cr
\multispan{3}\hrulefill\cr
& Program Counter High && 0x2\cr
\multispan{3}\hrulefill\cr
& Program Counter Low && 0x4\cr
\multispan{3}\hrulefill\cr
& Format/Vector Offset && 0x6\cr
\multispan{3}\hrulefill\cr
}}\hfil}
@end tex
@end ifset
 
@ifset use-html
@html
<CENTER>
<TABLE COLS=2 WIDTH="40%" BORDER=2>
<TR><TD ALIGN=center><STRONG>Status Register</STRONG></TD>
<TD ALIGN=center>0x0</TD></TR>
<TR><TD ALIGN=center><STRONG>Program Counter High</STRONG></TD>
<TD ALIGN=center>0x2</TD></TR>
<TR><TD ALIGN=center><STRONG>Program Counter Low</STRONG></TD>
<TD ALIGN=center>0x4</TD></TR>
<TR><TD ALIGN=center><STRONG>Format/Vector Offset</STRONG></TD>
<TD ALIGN=center>0x6</TD></TR>
</TABLE>
</CENTER>
@end html
@end ifset
 
@section Interrupt Levels
 
Eight levels (0-7) of interrupt priorities are
supported by XXX family members with level seven (7) being
the highest priority. Level zero (0) indicates that interrupts
are fully enabled. Interrupt requests for interrupts with
priorities less than or equal to the current interrupt mask
level are ignored.
 
Although RTEMS supports 256 interrupt levels, the
XXX family only supports eight. RTEMS interrupt levels 0
through 7 directly correspond to XXX interrupt levels. All
other RTEMS interrupt levels are undefined and their behavior is
unpredictable.
 
@section Disabling of Interrupts by RTEMS
 
During the execution of directive calls, critical
sections of code may be executed. When these sections are
encountered, RTEMS disables interrupts to level seven (7) before
the execution of this section and restores them to the previous
level upon completion of the section. RTEMS has been optimized
to insure that interrupts are disabled for less than
RTEMS_MAXIMUM_DISABLE_PERIOD microseconds on a
RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ Mhz processor with
zero wait states. These numbers will vary based the
number of wait states and processor speed present on the target board.
[NOTE: The maximum period with interrupts disabled is hand calculated. This
calculation was last performed for Release
RTEMS_RELEASE_FOR_MAXIMUM_DISABLE_PERIOD.]
 
Non-maskable interrupts (NMI) cannot be disabled, and
ISRs which execute at this level MUST NEVER issue RTEMS system
calls. If a directive is invoked, unpredictable results may
occur due to the inability of RTEMS to protect its critical
sections. However, ISRs that make no system calls may safely
execute as non-maskable interrupts.
 
@section Interrupt Stack
 
RTEMS allocates the interrupt stack from the
Workspace Area. The amount of memory allocated for the
interrupt stack is determined by the interrupt_stack_size field
in the CPU Configuration Table. During the initialization
process, RTEMS will install its interrupt stack.
 
The mips64orion port of RTEMS supports a software managed
dedicated interrupt stack on those CPU models which do not
support a separate interrupt stack in hardware.
 
 
/preface.texi
0,0 → 1,57
@c
@c COPYRIGHT (c) 1988-2002.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@c preface.texi,v 1.4 2002/01/17 21:47:46 joel Exp
@c
 
@ifinfo
@node Preface, CPU Model Dependent Features, Top, Top
@end ifinfo
@unnumbered Preface
 
The Real Time Executive for Multiprocessor Systems (RTEMS)
is designed to be portable across multiple processor
architectures. However, the nature of real-time systems makes
it essential that the application designer understand certain
processor dependent implementation details. These processor
dependencies include calling convention, board support package
issues, interrupt processing, exact RTEMS memory requirements,
performance data, header files, and the assembly language
interface to the executive.
 
This document discusses the VENDOR XXX
architecture dependencies in this port of RTEMS. The XXX
family has a wide variety of CPU models within it. The part
numbers ...
 
XXX fill in some things here
 
It is highly recommended that the XXX
RTEMS application developer obtain and become familiar with the
documentation for the processor being used as well as the
documentation for the family as a whole.
 
@subheading Architecture Documents
 
IDT docs are online at http://www.idt.com/products/risc/Welcome.html
 
For information on the XXX architecture,
refer to the following documents available from VENDOR
(@file{http//www.XXX.com/}):
 
@itemize @bullet
@item @cite{XXX Family Reference, VENDOR, PART NUMBER}.
@end itemize
 
@subheading MODEL SPECIFIC DOCUMENTS
 
For information on specific processor models and
their associated coprocessors, refer to the following documents:
 
@itemize @bullet
@item @cite{XXX MODEL Manual, VENDOR, PART NUMBER}.
@item @cite{XXX MODEL Manual, VENDOR, PART NUMBER}.
@end itemize
 
/.
. Property changes : Added: svn:ignore ## -0,0 +1,36 ## +Makefile +Makefile.in +bsp.texi +callconv.texi +cpumodel.texi +cputable.texi +fatalerr.texi +index.html +intr.t +intr.texi +mdate-sh +memmodel.texi +mips64orion +mips64orion*.html +mips64orion-? +mips64orion-?? +mips64orion.aux +mips64orion.cp +mips64orion.dvi +mips64orion.fn +mips64orion.ky +mips64orion.log +mips64orion.pdf +mips64orion.pg +mips64orion.ps +mips64orion.toc +mips64orion.tp +mips64orion.vr +timeBSP.texi +timeBSP_.t +timing.t +timing.texi +wksheets.t +wksheets.texi +rtems_header.html +rtems_footer.html

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