4. Coprocessor Access Instructions

4. Coprocessor Access Instructions

The coprocessor is used to perform specific processing tasks, for example: a coprocessor with mathematical calculations can control the digital processing to reduce the burden on the processor. ARM can support up to 16 coprocessors, where CP15 is the most important one.

：

Format:

?

Now we use the MRC command to read the main ID in the CP15 coprocessor:

According to the above instructions:

Operation Result:

The value read is 0x410fb766, which is consistent with the values in the description of our nuclear handbook. Description Read success:

The above is read and the next step is to write something to the coprocessor.

4. Coprocessor Access Instructions