CONTENTS

6.3.5

Coprocessor Unusable exception --------------------------------------------------------

68

6.3.6

Interrupts ----------------------------------------------------------------------------------------

69

6.3.7

Overflow exception ---------------------------------------------------------------------------

70

6.3.8

Reserved Instruction exception------------------------------------------------------------

70

6.3.9

Reset exception -------------------------------------------------------------------------------

71

6.3.10

System Call exception-----------------------------------------------------------------------

72

6.3.11

Non-maskable interrupt ---------------------------------------------------------------------

72

6.4

Priority of Exceptions ----------------------------------------------------------------

73

6.5

Return from Exception Handler ---------------------------------------------------

73

Chapter 7

Caches ----------------------------------------------------------------------------------

75

7.1

Instruction Cache ---------------------------------------------------------------------

75

7.2

Data Cache ----------------------------------------------------------------------------

76

7.2.1

Lock function -----------------------------------------------------------------------------------

77

7.3

Cache Test Function-----------------------------------------------------------------

79

7.4

Cache Refill ----------------------------------------------------------------------------

80

7.5

Cache Snoop --------------------------------------------------------------------------

81

Chapter 8

Debugging Functions ----------------------------------------------------------------

83

8.1

System Control Processor (CP0) Registers -----------------------------------

83

8.2

Debug Exceptions --------------------------------------------------------------------

87

8.3

Details of Debug Exceptions-------------------------------------------------------

90

Appendix A

 

Instruction Set Details -------------------------------------------------------

93

iii

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Toshiba TX39 user manual Appendix a Instruction Set Details, Coprocessor Unusable exception