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MC68030FE33 Datasheet(PDF) 19 Page - Motorola, Inc |
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MC68030FE33 Datasheet(HTML) 19 Page - Motorola, Inc |
19 / 602 page xl MC68030 USER’S MANUAL MOTOROLA LIST OF ILLUSTRATIONS (Continued) Figure Number Title Page Number 8-8 RTE Instruction for Throwaway Four-Word Frame . . . . . . . . . . . . . . . . . . 8-26 8-9 Special Status Word (SSW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28 9-1 MMU Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 9-2 MMU Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4 9-3 Translation Table Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5 9-4 Example Translation Table Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7 9-5 Example Translation Tree Layout in Memory. . . . . . . . . . . . . . . . . . . . . . . 9-8 9-6 Derivation of Table Index Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9 9-7 Example Translation Tree Using Different Format Descriptors . . . . . . . . . 9-12 9-8 Address Translation General Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14 9-9 Root Pointer Descriptor Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-23 9-10 Short-Format Table Descriptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24 9-11 Long-Format Table Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24 9-12 Short-Format Page Descriptor and Short-Format Early Termination Page Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25 9-13 Long-Format Early Termination Page Descriptor. . . . . . . . . . . . . . . . . . . . 9-25 9-14 Long-Format Page Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26 9-15 Short-Format Invalid Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26 9-16 Long-Format Invalid Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-27 9-17 Short-Format Indirect Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-27 9-18 Long-Format Indirect Descriptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28 9-19 Simplified Table Search Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29 9-20 Five-Level Table Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31 9-21 Example Translation Tree Using Contiguous Memory. . . . . . . . . . . . . . . . 9-35 9-22 Example Translation Tree Using Indirect Descriptors . . . . . . . . . . . . . . . . 9-36 9-23 Example Translation Tree Using Shared Tables . . . . . . . . . . . . . . . . . . . . 9-38 9-24 Example Translation Tree with Nonresident Tables. . . . . . . . . . . . . . . . . . 9-39 9-25 Detailed Flowchart of MMU Table Search Operation. . . . . . . . . . . . . . . . . 9-41 9-26 Table Search Initialization Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-42 9-27 ATC Entry Creation Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-42 9-28 Limit Check Procedure Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-43 9-29 Detailed Flowchart of Descriptor Fetch Operation . . . . . . . . . . . . . . . . . . . 9-44 9-30 Logical Address Map Using Function Code Lookup . . . . . . . . . . . . . . . . . 9-45 9-31 Example Translation Tree Using Function Code Lookup. . . . . . . . . . . . . . 9-46 9-32 Example Translation Tree Structure for Two Tasks . . . . . . . . . . . . . . . . . . 9-47 9-33 Exmple Logical Address Map with Shared Supervisor and User Address Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-49 9-34 Exmple Translation Tree Using S and WP Bits to Set Protection . . . . . . . 9-50 9-35 Root Pointer Register (CRP, SRP) Format . . . . . . . . . . . . . . . . . . . . . . . . 9-54 9-36 Translation Control Register (TC) Format . . . . . . . . . . . . . . . . . . . . . . . . . 9-54 9-37 Transparent Translation Register (TT0 and TT1) Format . . . . . . . . . . . . . 9-57 |
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