dcache_iall.adoc

th.dcache.iall

Synopsis

Invalidate all D-cache

Mnemonic

th.dcache.iall

Encoding

{reg:[
    { bits:  7, name: 0xb, attr: ['custom-0, 32 bit'] },
    { bits:  5, name: 0x0 },
    { bits:  3, name: 0x0, attr: ['CMO'] },
    { bits:  5, name: 0x0 },
    { bits:  5, name: 0x2, attr: ['dcache.iall'] },
    { bits:  7, name: 0x00 },
]}

Description

This instruction invalidates all cache lines of the data cache on the local hart. Dirty cache lines will not be written back to the next-level storage.

Operation

if (priv_level == U)
{
  <raise illegal instruction exception>
}

<invalidate all data cache lines of the local hart>

Permission

This instruction can be executed in all privilege levels higher than U mode. Attempts to execute this instruction in U mode raise an illegal instruction exception.

Exceptions

This instruction does not trigger any exceptions.

Included in

Extension	HW requirements
XTheadCmo ([xtheadcmo])	D-cache