forked from Imagelibrary/rtems
437 lines
17 KiB
Perl
437 lines
17 KiB
Perl
@c ****** This comment is here to remind you not to edit the wksheets.t
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@c ****** in any directory but common.
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@c
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@c Figures ...
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@c RTEMS RAM Workspace Worksheet
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@c RTEMS Code Space Worksheet
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@c
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@c COPYRIGHT (c) 1988-1998.
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@c On-Line Applications Research Corporation (OAR).
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@c All rights reserved.
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@c
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@c $Id$
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@c
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@ifinfo
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@node Memory Requirements, Memory Requirements Introduction, WORKSHEETS_PREVIOUS_LINK, Top
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@end ifinfo
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@chapter Memory Requirements
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@ifinfo
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@menu
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* Memory Requirements Introduction::
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* Memory Requirements Data Space Requirements::
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* Memory Requirements Minimum and Maximum Code Space Requirements::
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* Memory Requirements RTEMS Code Space Worksheet::
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* Memory Requirements RTEMS RAM Workspace Worksheet::
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@end menu
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@end ifinfo
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@ifinfo
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@node Memory Requirements Introduction, Memory Requirements Data Space Requirements, Memory Requirements, Memory Requirements
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@end ifinfo
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@section Introduction
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Memory is typically a limited resource in real-time
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embedded systems, therefore, RTEMS can be configured to utilize
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the minimum amount of memory while meeting all of the
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applications requirements. Worksheets are provided which allow
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the RTEMS application developer to determine the amount of RTEMS
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code and RAM workspace which is required by the particular
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configuration. Also provided are the minimum code space,
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maximum code space, and the constant data space required by
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RTEMS.
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@ifinfo
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@node Memory Requirements Data Space Requirements, Memory Requirements Minimum and Maximum Code Space Requirements, Memory Requirements Introduction, Memory Requirements
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@end ifinfo
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@section Data Space Requirements
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RTEMS requires a small amount of memory for its
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private variables. This data area must be in RAM and is
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separate from the RTEMS RAM Workspace. The following
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illustrates the data space required for all configurations of
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RTEMS:
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@itemize @bullet
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@item Data Space: RTEMS_DATA_SPACE
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@end itemize
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@ifinfo
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@node Memory Requirements Minimum and Maximum Code Space Requirements, Memory Requirements RTEMS Code Space Worksheet, Memory Requirements Data Space Requirements, Memory Requirements
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@end ifinfo
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@section Minimum and Maximum Code Space Requirements
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A maximum configuration of RTEMS includes the core
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and all managers, including the multiprocessing manager.
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Conversely, a minimum configuration of RTEMS includes only the
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core and the following managers: initialization, task, interrupt
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and fatal error. The following illustrates the code space
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required by these configurations of RTEMS:
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@itemize @bullet
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@item Minimum Configuration: RTEMS_MINIMUM_CONFIGURATION
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@item Maximum Configuration: RTEMS_MAXIMUM_CONFIGURATION
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@end itemize
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@ifinfo
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@node Memory Requirements RTEMS Code Space Worksheet, Memory Requirements RTEMS RAM Workspace Worksheet, Memory Requirements Minimum and Maximum Code Space Requirements, Memory Requirements
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@end ifinfo
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@section RTEMS Code Space Worksheet
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The RTEMS Code Space Worksheet is a tool provided to
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aid the RTEMS application designer to accurately calculate the
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memory required by the RTEMS run-time environment. RTEMS allows
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the custom configuration of the executive by optionally
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excluding managers which are not required by a particular
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application. This worksheet provides the included and excluded
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size of each manager in tabular form allowing for the quick
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calculation of any custom configuration of RTEMS. The RTEMS
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Code Space Worksheet is below:
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@ifset use-ascii
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@page
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@end ifset
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@ifset use-tex
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@page
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@end ifset
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@page
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@center @b{RTEMS Code Space Worksheet}
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@sp 1
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@ifset use-ascii
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The following is a list of the components of the RTEMS code space. The first
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number in parentheses is the size when the component is included,
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while the second number indicates its size when not included. If the second
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number is "NA", then the component must always be included.
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@itemize @bullet
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@item Core (RTEMS_CORE_CODE_SIZE, NA)
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@item Initialization (RTEMS_INITIALIZATION_CODE_SIZE, NA)
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@item Task (RTEMS_TASK_CODE_SIZE, NA)
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@item Interrupt (RTEMS_INTERRUPT_CODE_SIZE, NA)
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@item Clock (RTEMS_CLOCK_CODE_SIZE, NA)
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@item Timer (RTEMS_TIMER_CODE_SIZE, RTEMS_TIMER_CODE_OPTSIZE)
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@item Semaphore (RTEMS_SEMAPHORE_CODE_SIZE, RTEMS_SEMAPHORE_CODE_OPTSIZE)
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@item Message (RTEMS_MESSAGE_CODE_SIZE, RTEMS_MESSAGE_CODE_OPTSIZE)
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@item Event (RTEMS_EVENT_CODE_SIZE, RTEMS_EVENT_CODE_OPTSIZE)
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@item Signal (RTEMS_SIGNAL_CODE_SIZE, RTEMS_SIGNAL_CODE_OPTSIZE)
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@item Partition (RTEMS_PARTITION_CODE_SIZE, RTEMS_PARTITION_CODE_OPTSIZE)
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@item Region (RTEMS_REGION_CODE_SIZE, RTEMS_REGION_CODE_OPTSIZE)
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@item Dual Ported Memory (RTEMS_DPMEM_CODE_SIZE, RTEMS_DPMEM_CODE_OPTSIZE)
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@item I/O (RTEMS_IO_CODE_SIZE, RTEMS_IO_CODE_OPTSIZE)
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@item Fatal Error (RTEMS_FATAL_ERROR_CODE_SIZE, NA)
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@item Rate Monotonic (RTEMS_RATE_MONOTONIC_CODE_SIZE, RTEMS_RATE_MONOTONIC_CODE_OPTSIZE)
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@item Multiprocessing (RTEMS_MULTIPROCESSING_CODE_SIZE, RTEMS_MULTIPROCESSING_CODE_OPTSIZE)
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@end itemize
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@end ifset
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@ifset use-tex
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@tex
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\line{\hskip 0.50in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 2.25in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.00in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.00in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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&\bf Component && \bf Included && \bf Not Included && \bf Size &\cr\noalign{\hrule}
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&Core && RTEMS_CORE_CODE_SIZE && NA && &\cr\noalign{\hrule}
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&Initialization && RTEMS_INITIALIZATION_CODE_SIZE && NA && &\cr\noalign{\hrule}
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&Task && RTEMS_TASK_CODE_SIZE && NA && &\cr\noalign{\hrule}
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&Interrupt && RTEMS_INTERRUPT_CODE_SIZE && NA && &\cr\noalign{\hrule}
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&Clock && RTEMS_CLOCK_CODE_SIZE && NA && &\cr\noalign{\hrule}
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&Timer && RTEMS_TIMER_CODE_SIZE && RTEMS_TIMER_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Semaphore && RTEMS_SEMAPHORE_CODE_SIZE && RTEMS_SEMAPHORE_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Message && RTEMS_MESSAGE_CODE_SIZE && RTEMS_MESSAGE_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Event && RTEMS_EVENT_CODE_SIZE && RTEMS_EVENT_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Signal && RTEMS_SIGNAL_CODE_SIZE && RTEMS_SIGNAL_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Partition && RTEMS_PARTITION_CODE_SIZE && RTEMS_PARTITION_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Region && RTEMS_REGION_CODE_SIZE && RTEMS_REGION_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Dual Ported Memory && RTEMS_DPMEM_CODE_SIZE && RTEMS_DPMEM_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&I/O && RTEMS_IO_CODE_SIZE && RTEMS_IO_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Fatal Error && RTEMS_FATAL_ERROR_CODE_SIZE && NA && &\cr\noalign{\hrule}
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&Rate Monotonic && RTEMS_RATE_MONOTONIC_CODE_SIZE && RTEMS_RATE_MONOTONIC_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&Multiprocessing && RTEMS_MULTIPROCESSING_CODE_SIZE && RTEMS_MULTIPROCESSING_CODE_OPTSIZE && &\cr\noalign{\hrule}
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&\multispan 5 \bf\hfil Total Code Space Requirements\qquad\hfil&&&\cr\noalign{\hrule}
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}}\hfil}
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@end tex
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@end ifset
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@ifset use-html
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@html
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<CENTER>
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<TABLE COLS=4 WIDTH="80%" BORDER=2>
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<TR><TD ALIGN=center><STRONG>Component</STRONG></TD>
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<TD ALIGN=center><STRONG>Included</STRONG></TD>
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<TD ALIGN=center><STRONG>Not Included</STRONG></TD>
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<TD ALIGN=center><STRONG>Size</STRONG></TD></TR>
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<TR><TD ALIGN=center>Core</TD>
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<TD ALIGN=center>RTEMS_CORE_CODE_SIZE</TD>
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<TD ALIGN=center>NA</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Initialization</TD>
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<TD ALIGN=center>RTEMS_INITIALIZATION_CODE_SIZE</TD>
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<TD ALIGN=center>NA</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Task</TD>
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<TD ALIGN=center>RTEMS_TASK_CODE_SIZE</TD>
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<TD ALIGN=center>NA</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Interrupt</TD>
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<TD ALIGN=center>RTEMS_INTERRUPT_CODE_SIZE</TD>
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<TD ALIGN=center>NA</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Clock</TD>
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<TD ALIGN=center>RTEMS_CLOCK_CODE_SIZE</TD>
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<TD ALIGN=center>NA</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Timer</TD>
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<TD ALIGN=center>RTEMS_TIMER_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_TIMER_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Semaphore</TD>
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<TD ALIGN=center>RTEMS_SEMAPHORE_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_SEMAPHORE_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Message</TD>
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<TD ALIGN=center>RTEMS_MESSAGE_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_MESSAGE_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Event</TD>
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<TD ALIGN=center>RTEMS_EVENT_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_EVENT_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Signal</TD>
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<TD ALIGN=center>RTEMS_SIGNAL_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_SIGNAL_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Partition</TD>
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<TD ALIGN=center>RTEMS_PARTITION_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_PARTITION_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Region</TD>
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<TD ALIGN=center>RTEMS_REGION_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_REGION_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Dual Ported Memory</TD>
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<TD ALIGN=center>RTEMS_DPMEM_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_DPMEM_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>I/O</TD>
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<TD ALIGN=center>RTEMS_IO_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_IO_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Fatal Error</TD>
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<TD ALIGN=center>RTEMS_FATAL_ERROR_CODE_SIZE</TD>
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<TD ALIGN=center>NA</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Rate Monotonic</TD>
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<TD ALIGN=center>RTEMS_RATE_MONOTONIC_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_RATE_MONOTONIC_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center>Multiprocessing</TD>
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<TD ALIGN=center>RTEMS_MULTIPROCESSING_CODE_SIZE</TD>
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<TD ALIGN=center>RTEMS_MULTIPROCESSING_CODE_OPTSIZE</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=center COLSPAN=3>
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<STRONG>Total Code Space Requirements</STRONG></TD>
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<TD><BR></TD></TR>
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</TABLE>
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</CENTER>
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@end html
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@end ifset
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@page
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@c ****** Next node is set by a sed script in the document Makefile.
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@c ****** This comment is here to remind you not to edit the wksheets.t
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@c ****** in any directory but common.
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@ifinfo
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@node Memory Requirements RTEMS RAM Workspace Worksheet, WORKSHEETS_NEXT_LINK, Memory Requirements RTEMS Code Space Worksheet, Memory Requirements
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@end ifinfo
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@section RTEMS RAM Workspace Worksheet
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The RTEMS RAM Workspace Worksheet is a tool provided
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to aid the RTEMS application designer to accurately calculate
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the minimum memory block to be reserved for RTEMS use. This
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worksheet provides equations for calculating the amount of
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memory required based upon the number of objects configured,
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whether for single or multiple processor versions of the
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executive. This information is presented in tabular form, along
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with the fixed system requirements, allowing for quick
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calculation of any application defined configuration of RTEMS.
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The RTEMS RAM Workspace Worksheet is provided below:
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@ifset use-ascii
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@page
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@end ifset
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@ifset use-tex
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@sp 2
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@end ifset
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@center @b{RTEMS RAM Workspace Worksheet}
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@sp 2
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@ifset use-ascii
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The total RTEMS RAM Workspace required is the sum of the following:
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@itemize @bullet
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@item maximum_tasks * RTEMS_BYTES_PER_TASK
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@item maximum_timers * RTEMS_BYTES_PER_TIMER
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@item maximum_semaphores * RTEMS_BYTES_PER_SEMAPHORE
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@item maximum_message_queues * RTEMS_BYTES_PER_MESSAGE_QUEUE
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@item maximum_regions * RTEMS_BYTES_PER_REGION
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@item maximum_partitions * RTEMS_BYTES_PER_PARTITION
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@item maximum_ports * RTEMS_BYTES_PER_PORT
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@item maximum_periods * RTEMS_BYTES_PER_PERIOD
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@item maximum_extensions * RTEMS_BYTES_PER_EXTENSION
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@item Floating Point Tasks * RTEMS_BYTES_PER_FP_TASK
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@item Task Stacks
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@item maximum_nodes * RTEMS_BYTES_PER_NODE
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@item maximum_global_objects * RTEMS_BYTES_PER_GLOBAL_OBJECT
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@item maximum_proxies * RTEMS_BYTES_PER_PROXY
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@item Fixed System Requirements of RTEMS_BYTES_OF_FIXED_SYSTEM_REQUIREMENTS
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@end itemize
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@end ifset
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@ifset use-tex
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@tex
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\line{\hskip 0.75in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 3.0in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 0.75in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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& \bf Description && \bf Equation && \bf Bytes Required &\cr\noalign{\hrule}
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& maximum\_tasks && * RTEMS_BYTES_PER_TASK = &&&\cr\noalign{\hrule}
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& maximum\_timers && * RTEMS_BYTES_PER_TIMER = &&&\cr\noalign{\hrule}
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& maximum\_semaphores && * RTEMS_BYTES_PER_SEMAPHORE = &&&\cr\noalign{\hrule}
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& maximum\_message\_queues && * RTEMS_BYTES_PER_MESSAGE_QUEUE = &&&\cr\noalign{\hrule}
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& maximum\_regions && * RTEMS_BYTES_PER_REGION = &&&\cr\noalign{\hrule}
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& maximum\_partitions && * RTEMS_BYTES_PER_PARTITION = &&&\cr\noalign{\hrule}
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& maximum\_ports && * RTEMS_BYTES_PER_PORT = &&&\cr\noalign{\hrule}
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& maximum\_periods && * RTEMS_BYTES_PER_PERIOD = &&&\cr\noalign{\hrule}
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& maximum\_extensions && * RTEMS_BYTES_PER_EXTENSION = &&&\cr\noalign{\hrule}
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& Floating Point Tasks && * RTEMS_BYTES_PER_FP_TASK = &&&\cr\noalign{\hrule}
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& Task Stacks &&\hskip 2.3em=&&&\cr\noalign{\hrule}
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& Total Single Processor Requirements &&&&&\cr\noalign{\hrule}
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}}\hfil}
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\line{\hskip 0.75in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 3.0in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 0.75in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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& \bf Description && \bf Equation && \bf Bytes Required &\cr\noalign{\hrule}
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& maximum\_nodes && * RTEMS_BYTES_PER_NODE = &&&\cr\noalign{\hrule}
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& maximum\_global\_objects && * RTEMS_BYTES_PER_GLOBAL_OBJECT = &&&\cr\noalign{\hrule}
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& maximum\_proxies && * RTEMS_BYTES_PER_PROXY = &&&\cr\noalign{\hrule}
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}}\hfil}
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\line{\hskip 0.75in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 3.0in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 0.75in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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& Total Multiprocessing Requirements &&&&&\cr\noalign{\hrule}
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& Fixed System Requirements && RTEMS_BYTES_OF_FIXED_SYSTEM_REQUIREMENTS &&&\cr\noalign{\hrule}
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& Total Single Processor Requirements &&&&&\cr\noalign{\hrule}
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& Total Multiprocessing Requirements &&&&&\cr\noalign{\hrule}
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& Minimum Bytes for RTEMS Workspace &&&&&\cr\noalign{\hrule}
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}}\hfil}
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@end tex
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@end ifset
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@ifset use-html
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@html
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<CENTER>
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<TABLE COLS=3 WIDTH="80%" BORDER=2>
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<TR><TD ALIGN=center><STRONG>Description</STRONG></TD>
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<TD ALIGN=center><STRONG>Equation</STRONG></TD>
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<TD ALIGN=center><STRONG>Bytes Required</STRONG></TD></TR>
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<TR><TD ALIGN=left>maximum_tasks</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_TASK =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_timers</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_TIMER =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_semaphores</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_SEMAPHORE =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_message_queues</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_MESSAGE_QUEUE =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_regions</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_REGION =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_partitions</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_PARTITION =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_ports</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_PORT =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_periods</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_PERIOD =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_extensions</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_EXTENSION =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left>Floating Point Tasks</TD>
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<TD ALIGN=right>* RTEMS_BYTES_PER_FP_TASK =</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left COLSPAN=2>Task Stacks</TD>
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<TD><BR></TD></TR>
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<TR><TD ALIGN=left COLSPAN=2>
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<STRONG>Total Single Processor Requirements</STRONG></TD>
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<TD><BR></TD></TR>
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<TR></TR>
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<TR><TD ALIGN=center><STRONG>Description</STRONG></TD>
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<TD ALIGN=center><STRONG>Equation</STRONG></TD>
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<TD ALIGN=center><STRONG>Bytes Required</STRONG></TD></TR>
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<TR><TD ALIGN=left>maximum_nodes</TD>
|
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<TD ALIGN=right>* RTEMS_BYTES_PER_NODE =</TD>
|
|
<TD><BR></TD></TR>
|
|
<TR><TD ALIGN=left>maximum_global_objects</TD>
|
|
<TD ALIGN=right>* RTEMS_BYTES_PER_GLOBAL_OBJECT =</TD>
|
|
<TD><BR></TD></TR>
|
|
<TR><TD ALIGN=left>maximum_proxies</TD>
|
|
<TD ALIGN=right>* RTEMS_BYTES_PER_PROXY =</TD>
|
|
<TD><BR></TD></TR>
|
|
<TR><TD ALIGN=left COLSPAN=2>
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|
<STRONG>Total Multiprocessing Requirements</STRONG></TD>
|
|
<TD><BR></TD></TR>
|
|
<TR></TR>
|
|
<TR><TD ALIGN=left COLSPAN=2>Fixed System Requirements</TD>
|
|
<TD ALIGN=center>RTEMS_BYTES_OF_FIXED_SYSTEM_REQUIREMENTS</TD></TR>
|
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<TR><TD ALIGN=left COLSPAN=2>Total Single Processor Requirements</TD>
|
|
<TD><BR></TD></TR>
|
|
<TR><TD ALIGN=left COLSPAN=2>Total Multiprocessing Requirements</TD>
|
|
<TD><BR></TD></TR>
|
|
<TR><TD ALIGN=left COLSPAN=2>
|
|
<STRONG>Minimum Bytes for RTEMS Workspace</STRONG></TD>
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|
<TD><BR></TD></TR>
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|
</TABLE>
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</CENTER>
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@end html
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@end ifset
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