Added chapter.

doc/supplements/template/bsp.t

@@ -0,0 +1,93 @@
+@c
+@c  COPYRIGHT (c) 1988-1998.
+@c  On-Line Applications Research Corporation (OAR).
+@c  All rights reserved.
+@c
+@c  $Id$
+@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.
+

doc/supplements/template/template.texi

@@ -69,7 +69,7 @@ END-INFO-DIR-ENTRY
 @include memmodel.texi
 @include intr.texi
 @include fatalerr.texi
-@c @include bsp.texi
+@include bsp.texi
 @c @include cputable.texi
 @c @include wksheets.texi
 @c @include ../../common/timing.texi
@@ -88,7 +88,7 @@ Applications Supplement.
 * Memory Model::
 * Interrupt Processing::
 * Default Fatal Error Processing::
-** Board Support Packages::
+* Board Support Packages::
 ** Processor Dependent Information Table::
 ** Memory Requirements::
 ** Timing Specification::