From 915d502831abcabe5a8210813c229347e36b5199 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Mon, 19 Oct 1998 19:24:40 +0000 Subject: Renamed bsp.texi to bsp.t. --- doc/supplements/powerpc/bsp.texi | 95 ---------------------------------------- 1 file changed, 95 deletions(-) delete mode 100644 doc/supplements/powerpc/bsp.texi (limited to 'doc/supplements/powerpc') diff --git a/doc/supplements/powerpc/bsp.texi b/doc/supplements/powerpc/bsp.texi deleted file mode 100644 index 015f7347e0..0000000000 --- a/doc/supplements/powerpc/bsp.texi +++ /dev/null @@ -1,95 +0,0 @@ -@c -@c COPYRIGHT (c) 1988-1998. -@c On-Line Applications Research Corporation (OAR). -@c All rights reserved. -@c -@c $Id$ -@c - -@ifinfo -@node Board Support Packages, Board Support Packages Introduction, Default Fatal Error Processing Default Fatal Error Handler Operations, Top -@end ifinfo -@chapter Board Support Packages -@ifinfo -@menu -* Board Support Packages Introduction:: -* Board Support Packages System Reset:: -* Board Support Packages Processor Initialization:: -@end menu -@end ifinfo - -@ifinfo -@node Board Support Packages Introduction, Board Support Packages System Reset, Board Support Packages, Board Support Packages -@end ifinfo -@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 PowerPC 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. - -@ifinfo -@node Board Support Packages System Reset, Board Support Packages Processor Initialization, Board Support Packages Introduction, Board Support Packages -@end ifinfo -@section System Reset - -An RTEMS based application is initiated or -re-initiated when the PowerPC processor is reset. The PowerPC -architecture defines a Reset Exception, but leaves the -details of the CPU state as implementation specific. Please -refer to the User's Manual for the CPU model in question. - -In general, at power-up the PowerPC begin execution at address -0xFFF00100 in supervisor mode with all exceptions disabled. For -soft resets, the CPU will vector to either 0xFFF00100 or 0x00000100 -depending upon the setting of the Exception Prefix bit in the MSR. -If during a soft reset, a Machine Check Exception occurs, then the -CPU may execute a hard reset. - -@ifinfo -@node Board Support Packages Processor Initialization, Processor Dependent Information Table, Board Support Packages System Reset, Board Support Packages -@end ifinfo -@section Processor Initialization - -It is the responsibility of the application's -initialization code to initialize the CPU and board -to a quiescent state before invoking the @code{rtems_initialize_executive} -directive. It is recommended that the BSP utilize the @code{predriver_hook} -to install default handlers for all exceptions. These default handlers -may be overwritten as various device drivers and subsystems install -their own exception handlers. Upon completion of RTEMS executive -initialization, all interrupts are enabled. - -If this PowerPC implementation supports on-chip caching -and this is to be utilized, then it should be enabled during the -reset application initialization code. On-chip caching has been -observed to prevent some emulators from working properly, so it -may be necessary to run with caching disabled to use these emulators. - -In addition to the requirements described in the -@b{Board Support Packages} chapter of the @b{@value{LANGUAGE} -Applications User's Manual} for the reset code -which is executed before the call to @code{rtems_initialize_executive}, -the PowrePC version has the following specific requirements: - -@itemize @bullet -@item Must leave the PR bit of the Machine State Register (MSR) set -to 0 so the PowerPC remains in the supervisor state. - -@item Must set stack pointer (sp or r1) such that a minimum stack -size of MINIMUM_STACK_SIZE bytes is provided for the -@code{rtems_initialize_executive} directive. - -@item Must disable all external interrupts (i.e. clear the EI (EE) -bit of the machine state register). - -@item Must enable traps so window overflow and underflow -conditions can be properly handled. - -@item Must initialize the PowerPC's initial Exception Table with default -handlers. - -@end itemize - -- cgit v1.2.3