Software ROM Patching on the Motorola DSP56304
by
Tom Zudock
Motorola, Incorporated Semiconductor Products Sector 6501 William Cannon Drive West Austin, TX 78735-8598
OnCE and Mfax are trademarks of Motorola, Inc.
MOTOROLA INC., 1998
Order this document by: APR33/D
Motorola reserves the right to make changes without further notice to any products herein to improve reliability, function, or design. Motorola does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 CACHE BASICS AND RELEVANT INSTRUCTIONS . . . . . . . . PATCHING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 SINGLE INSTRUCTION REPLACEMENT. . . . . . . . . . . . . . . . . 2.3 SKIPPING MULTIPLE INSTRUCTIONS . . . . . . . . . . . . . . . . . . 2.4 INSERTING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . OPTIMIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 MINIMIZING PATCHING IMPACT ON THE CACHE . . . . . . . . . 3.3 MULTIPLE PATCHES COVERED BY ONE CACHE SECTOR ADDRESS RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 DAISY-CHAINING PATCHES TOGETHER . . . . . . . . . . . . . . . . 1-1 1-3 1-3 1-3 2-1 2-3 2-3 2-5 2-6 3-1 3-3 3-3 3-3 3-4
MOTOROLA
DSP56304 ROM Software Patching
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DSP56304 ROM Software Patching
MOTOROLA
LIST OF EXAMPLES
Example 2-1 Example 2-2 Example 2-3 Example 2-4 Example 2-5 Example 2-6 Example 2-7 Example 3-1 Example 3-2 Example 3-2 Example 3-2 ROM Filter Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 ROM Filter Patch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Multiple Instruction ROM Code . . . . . . . . . . . . . . . . . . . ...
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