[RTEMS Project] #4458: Simplify trap table initialization

[RTEMS trac]

#4458: Simplify trap table initialization
------------------------------+-----------------------------
  Reporter:  Sebastian Huber  |      Owner:  Sebastian Huber
      Type:  enhancement      |     Status:  assigned
  Priority:  normal           |  Milestone:  6.1
 Component:  arch/sparc       |    Version:  6
  Severity:  normal           |   Keywords:  qualification
Blocked By:                   |   Blocking:
------------------------------+-----------------------------
 Currently, the trap table is statically initialized (see start.S).
 Unexpected traps end up in system error mode. Later during startup most
 traps are changed to jump to _ISR_Handler(). This is a side-effect of
 bsp_spurious_initialize(). The used functions for this dynamic
 initialization are a bit complex and need cache manager directives which
 involve all online processors. This should be simplified to cover only
 basic requirements.

 1. The _ISR_Vector_table should be initialized by
 _CPU_Initialize_vectors() to an new default handler
 _SPARC_ISR_handler_default() which just invokes _Terminate().

 2. The traps associated with external interrupts (0x11 up to including
 0x1f) should be statically initialized in start.S to jump to
 _ISR_Handler().

 If software needs to change the default initialization, then it can use
 set_vector() or alternatives on demand.

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Ticket URL: <http://devel.rtems.org/ticket/4458>
RTEMS Project <http://www.rtems.org/>
RTEMS Project