SH7727 datasheet(34/1109 Pages) RENESAS

34 / 1109 page

Rev. 5.00 Dec 12, 2005 page xxxiv of lxxii

3.3

TLB Functions .................................................................................................................. 105

3.3.1

Configuration of the TLB .................................................................................... 105

3.3.2

TLB Indexing....................................................................................................... 107

3.3.3

TLB Address Comparison ................................................................................... 108

3.3.4

Page Management Information ............................................................................ 110

3.4

MMU Functions................................................................................................................ 111

3.4.1

MMU Hardware Management ............................................................................. 111

3.4.2

MMU Software Management .............................................................................. 111

3.4.3

MMU Instruction (LDTLB)................................................................................. 112

3.4.4

Avoiding Synonym Problems .............................................................................. 113

3.5

MMU Exceptions.............................................................................................................. 116

3.5.1

TLB Miss Exception ............................................................................................ 116

3.5.2

TLB Protection Violation Exception ................................................................... 117

3.5.3

TLB Invalid Exception......................................................................................... 118

3.5.4

Initial Page Write Exception ................................................................................ 119

3.5.5

Processing Flow in Event of MMU Exception (Same Processing Flow

for Address Error) ................................................................................................ 121

3.5.6

MMU Exception in Repeat Loop......................................................................... 123

3.6

Memory-Mapped TLB...................................................................................................... 124

3.6.1

Address Array ...................................................................................................... 125

3.6.2

Data Array............................................................................................................ 125

3.6.3

Usage Examples................................................................................................... 127

3.7

Usage Notes ...................................................................................................................... 128

Section 4 Exception Handling ......................................................................................... 131

4.1

Overview........................................................................................................................... 131

4.1.1

Features................................................................................................................ 131

4.1.2

4.2

Exception Handling Function ........................................................................................... 131

4.2.1

Exception Handling Flow .................................................................................... 131

4.2.2

Exception Handling Vector Addresses ................................................................ 132

4.2.3

Acceptance of Exceptions.................................................................................... 134

4.2.4

Exception Codes .................................................................................................. 136

4.2.5

Exception Request Masks .................................................................................... 137

4.2.6

Returning from Exception Handling.................................................................... 138

4.3

Register Description.......................................................................................................... 138

4.4

Exception Handling Operation.......................................................................................... 139

4.4.1

Reset..................................................................................................................... 139

4.4.2

Interrupts.............................................................................................................. 139

4.4.3

General Exceptions .............................................................................................. 140

4.5

Individual Exception Operations....................................................................................... 140

SH7727 Datasheet(PDF) 34 Page - Renesas Technology Corp

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