l2cache_call.adoc

th.l2cache.call

Synopsis

Clean all L2 cache

Mnemonic

th.l2cache.call

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: 0x15, attr: ['l2cache.call'] },
    { bits:  7, name: 0x00 },
]}

Description

This instruction cleans all cache lines of the L2 cache. Dirty cache lines will be written back to the next-level storage.

Operation

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

<write back all dirty L2 cache lines>

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/I-cache, 2nd level cache