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Renamed cputable.texi to cputable.t.
This commit is contained in:
Joel Sherrill
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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 Processor Dependent Information Table, Processor Dependent Information Table Introduction, Board Support Packages Processor Initialization, Top
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@end ifinfo
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@chapter Processor Dependent Information Table
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@ifinfo
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@menu
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* Processor Dependent Information Table Introduction::
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* Processor Dependent Information Table CPU Dependent Information Table::
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@end menu
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@end ifinfo
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@ifinfo
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@node Processor Dependent Information Table Introduction, Processor Dependent Information Table CPU Dependent Information Table, Processor Dependent Information Table, Processor Dependent Information Table
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@end ifinfo
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@section Introduction
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Any highly processor dependent information required
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to describe a processor to RTEMS is provided in the CPU
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Dependent Information Table. This table is not required for all
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processors supported by RTEMS. This chapter describes the
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contents, if any, for a particular processor type.
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@ifinfo
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@node Processor Dependent Information Table CPU Dependent Information Table, Memory Requirements, Processor Dependent Information Table Introduction, Processor Dependent Information Table
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@end ifinfo
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@section CPU Dependent Information Table
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The PowerPC version of the RTEMS CPU Dependent
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Information Table is given by the C structure definition is
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shown below:
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@example
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typedef struct @{
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void (*pretasking_hook)( void );
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void (*predriver_hook)( void );
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void (*postdriver_hook)( void );
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void (*idle_task)( void );
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boolean do_zero_of_workspace;
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unsigned32 idle_task_stack_size;
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unsigned32 interrupt_stack_size;
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unsigned32 extra_mpci_receive_server_stack;
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void * (*stack_allocate_hook)( unsigned32 );
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void (*stack_free_hook)( void* );
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/* end of fields required on all CPUs */
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unsigned32 clicks_per_usec; /* Timer clicks per microsecond */
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void (*spurious_handler)(unsigned32 vector, CPU_Interrupt_frame *);
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boolean exceptions_in_RAM; /* TRUE if in RAM */
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#if defined(ppc403)
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unsigned32 serial_per_sec; /* Serial clocks per second */
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boolean serial_external_clock;
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boolean serial_xon_xoff;
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boolean serial_cts_rts;
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unsigned32 serial_rate;
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unsigned32 timer_average_overhead; /* in ticks */
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unsigned32 timer_least_valid; /* Least valid number from timer */
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#endif
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@};
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@end example
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@table @code
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@item pretasking_hook
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is the address of the
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user provided routine which is invoked once RTEMS initialization
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is complete but before interrupts and tasking are enabled. This
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field may be NULL to indicate that the hook is not utilized.
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@item predriver_hook
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is the address of the user provided
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routine which is invoked with tasking enabled immediately before
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the MPCI and device drivers are initialized. RTEMS
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initialization is complete, interrupts and tasking are enabled,
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but no device drivers are initialized. This field may be NULL to
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indicate that the hook is not utilized.
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@item postdriver_hook
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is the address of the user provided
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routine which is invoked with tasking enabled immediately after
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the MPCI and device drivers are initialized. RTEMS
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initialization is complete, interrupts and tasking are enabled,
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and the device drivers are initialized. This field may be NULL
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to indicate that the hook is not utilized.
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@item idle_task
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is the address of the optional user
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provided routine which is used as the system's IDLE task. If
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this field is not NULL, then the RTEMS default IDLE task is not
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used. This field may be NULL to indicate that the default IDLE
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is to be used.
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@item do_zero_of_workspace
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indicates whether RTEMS should
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zero the Workspace as part of its initialization. If set to
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TRUE, the Workspace is zeroed. Otherwise, it is not.
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@item idle_task_stack_size
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is the size of the RTEMS idle task stack in bytes.
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If this number is less than MINIMUM_STACK_SIZE, then the
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idle task's stack will be MINIMUM_STACK_SIZE in byte.
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@item interrupt_stack_size
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is the size of the RTEMS allocated interrupt stack in bytes.
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This value must be at least as large as MINIMUM_STACK_SIZE.
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@item extra_mpci_receive_server_stack
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is the extra stack space allocated for the RTEMS MPCI receive server task
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in bytes. The MPCI receive server may invoke nearly all directives and
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may require extra stack space on some targets.
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@item stack_allocate_hook
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is the address of the optional user provided routine which allocates
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memory for task stacks. If this hook is not NULL, then a stack_free_hook
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must be provided as well.
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@item stack_free_hook
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is the address of the optional user provided routine which frees
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memory for task stacks. If this hook is not NULL, then a stack_allocate_hook
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must be provided as well.
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@item clicks_per_usec
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is the number of decrementer interupts that occur each microsecond.
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@item spurious_handler
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is the address of the
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routine which is invoked when a spurious interrupt occurs.
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@item exceptions_in_RAM
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indicates whether the exception vectors are located in RAM or ROM. If
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they are located in RAM dynamic vector installation occurs, otherwise
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it does not.
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@item serial_per_sec
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is a PPC403 specific field which specifies the number of clock
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ticks per second for the PPC403 serial timer.
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@item serial_rate
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is a PPC403 specific field which specifies the baud rate for the
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PPC403 serial port.
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@item serial_external_clock
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is a PPC403 specific field which indicates whether or not to mask in a 0x2 into
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the Input/Output Configuration Register (IOCR) during initialization of the
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PPC403 console. (NOTE: This bit is defined as "reserved" 6-12?)
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@item serial_xon_xoff
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is a PPC403 specific field which indicates whether or not
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XON/XOFF flow control is supported for the PPC403 serial port.
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@item serial_cts_rts
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is a PPC403 specific field which indicates whether or not to set the
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least significant bit of the Input/Output Configuration Register
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(IOCR) during initialization of the PPC403 console. (NOTE: This
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bit is defined as "reserved" 6-12?)
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@item timer_average_overhead
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is a PPC403 specific field which specifies the average number of overhead ticks that occur on the PPC403 timer.
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@item timer_least_valid
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is a PPC403 specific field which specifies the maximum valid PPC403 timer value.
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@end table
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