CacheControl

Instruction & data cache control

This function provides global control of any instruction or data caches that may be connected to the system. All settings are global - per task control is not provided.

The action taken by this function will depend on the type of CPU installed. This function may be patched to support external caches, or different cache architectures. In all cases the function will attempt to best emulate the provided settings. Use of this function may save state specific to the caches involved.

The list of supported settings is provided in the "exec/execbase.i" include file. The bits currently defined map directly to the Motorola 68030 CPU CACR register. Alternate cache solutions may patch into the Exec cache functions. Where possible, bits will be interpreted to have the same meaning on the installed cache.

cacheBits

new values for the bits specified in cacheMask.

cacheMask

a mask with ones for all bits to be changed.

oldBits

the complete prior values for all settings.

As a side effect, this function clears all caches.

"exec/execbase.i", CacheClearU(), CacheClearE()