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3 third dword, Figure5.14 memory move instructions – third dword, 7 load and store instructions – Avago Technologies LSI53C1000R User Manual

Page 279: Third dword, Load and store instructions, Memory move instructions – third dword, Section 5.7, “load and store instructions

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Load and Store Instructions

5-37

Version 2.2

Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.

5.6.3 Third Dword

This section describes the third Dword of the Memory Move Instruction
register.

Figure 5.14 Memory Move Instructions – Third Dword

TEMP Register

[31:0]

These bits contain the destination address for the
Memory Move.

If the destination address is in the 64-bit address space,
the bits are contained in the

Memory Move Write Selector (MMWS)

register.

5.7 Load and Store Instructions

The Load and Store instructions provide a more efficient way to move
data from/to memory to/from an internal register in the chip without using
the normal memory move instruction.

The load and store instructions are represented by two Dword opcodes.
The first Dword contains the

DMA Command (DCMD)

and

DMA Byte Counter (DBC)

register values. The second Dword contains

the

DMA SCRIPTS Pointer Save (DSPS)

value. This is either the actual

memory location of where to load/store, or the offset from the

Data Structure Address (DSA)

, depending on the value of bit 28

(DSA Relative).

For load operations where the data is read from the 64-bit address
space, the upper Dword of address resides in the

Memory Move Read Selector (MMRS)

register. For store operations

where the data is written to the 64-bit address space, the upper Dword
of address resides in the

Memory Move Write Selector (MMWS)

register.

31

0

TEMP Register

31

0

MMWS Register

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