icache_ialls.adoc

th.icache.ialls

Synopsis

Invalidate all I-cache on all harts

Mnemonic

th.icache.ialls

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: 0x11, attr: ['iache.ialls'] },
    { bits:  7, name: 0x00 },
]}

Description

This instruction invalidates all cache lines of the instruction cache on all harts (using broadcasting). Dirty cache lines will not be written back to the next-level storage.

Operation

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

<invalidate all instruction cache lines on all harts>

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])	I-cache