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diff --git a/doc/supplements/powerpc/cputable.t b/doc/supplements/powerpc/cputable.t new file mode 100644 index 0000000000..42f67b1a70 --- /dev/null +++ b/doc/supplements/powerpc/cputable.t @@ -0,0 +1,155 @@ +@c +@c COPYRIGHT (c) 1988-2002. +@c On-Line Applications Research Corporation (OAR). +@c All rights reserved. +@c +@c $Id$ +@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 PowerPC version of the RTEMS CPU Dependent +Information Table is given by the C structure definition is +shown below: + +@example +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 */ + + unsigned32 clicks_per_usec; /* Timer clicks per microsecond */ + void (*spurious_handler)( + unsigned32 vector, CPU_Interrupt_frame *); + boolean exceptions_in_RAM; /* TRUE if in RAM */ + +#if defined(ppc403) + unsigned32 serial_per_sec; /* Serial clocks per second */ + boolean serial_external_clock; + boolean serial_xon_xoff; + boolean serial_cts_rts; + unsigned32 serial_rate; + unsigned32 timer_average_overhead; /* in ticks */ + unsigned32 timer_least_valid; /* Least valid number from timer */ +#endif +@}; +@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 clicks_per_usec +is the number of decrementer interupts that occur each microsecond. + +@item spurious_handler +is the address of the +routine which is invoked when a spurious interrupt occurs. + +@item exceptions_in_RAM +indicates whether the exception vectors are located in RAM or ROM. If +they are located in RAM dynamic vector installation occurs, otherwise +it does not. + +@item serial_per_sec +is a PPC403 specific field which specifies the number of clock +ticks per second for the PPC403 serial timer. + +@item serial_rate +is a PPC403 specific field which specifies the baud rate for the +PPC403 serial port. + +@item serial_external_clock +is a PPC403 specific field which indicates whether or not to mask in a 0x2 into +the Input/Output Configuration Register (IOCR) during initialization of the +PPC403 console. (NOTE: This bit is defined as "reserved" 6-12?) + +@item serial_xon_xoff +is a PPC403 specific field which indicates whether or not +XON/XOFF flow control is supported for the PPC403 serial port. + +@item serial_cts_rts +is a PPC403 specific field which indicates whether or not to set the +least significant bit of the Input/Output Configuration Register +(IOCR) during initialization of the PPC403 console. (NOTE: This +bit is defined as "reserved" 6-12?) + +@item timer_average_overhead +is a PPC403 specific field which specifies the average number of overhead ticks that occur on the PPC403 timer. + +@item timer_least_valid +is a PPC403 specific field which specifies the maximum valid PPC403 timer value. + +@end table + |