RTEMS 4.0.0 On-Line Library

Processor Dependent Information Table CPU Dependent Information Table

RTEMS SPARC Applications Supplement

7.2: CPU Dependent Information Table

The SPARC version of the RTEMS CPU Dependent Information Table is given by the C structure definition is shown below:

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 */

} rtems_cpu_table;

pretasking_hook: is the address of the user provided routine which is invoked once RTEMS initialization is complete but before interrupts and tasking are enabled. This field may be NULL to indicate that the hook is not utilized.
predriver_hook: is the address of the user provided routine which is invoked with tasking enabled immediately before the MPCI and device drivers are initialized. RTEMS initialization is complete, interrupts and tasking are enabled, but no device drivers are initialized. This field may be NULL to indicate that the hook is not utilized.
postdriver_hook: is the address of the user provided routine which is invoked with tasking enabled immediately after the MPCI and device drivers are initialized. RTEMS initialization is complete, interrupts and tasking are enabled, and the device drivers are initialized. This field may be NULL to indicate that the hook is not utilized.
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.
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.
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.
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.
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.
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.
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.

RTEMS SPARC Applications Supplement