processor.cxxm File Reference

cpu synchronization More...

import lib.bit;
import arch.s390x.cpu.diag;
import arch.s390x.cpu.ctlreg;
import zxfoundation.base.types;
import arch.s390x.cpu.types;

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Data Structures
struct	arch::s390x::cpu::processor::cpuid
	cpuid structure (STIDP result). More...

Functions
auto	arch::s390x::cpu::processor::cpu_addr () noexcept -> u16
	Store CPU Address (STAP) — returns the hardware CPU address.
auto	arch::s390x::cpu::processor::get_cpuid (cpuid *id) -> void
auto	arch::s390x::cpu::processor::get_current_sp () noexcept -> u64
	Read the current stack pointer (r15).
auto	arch::s390x::cpu::processor::get_prefix () noexcept -> u32
	Store Prefix (STPX) — returns the physical address in the Prefix Register.
auto	arch::s390x::cpu::processor::is_hypervisor () noexcept -> bool
	Probe whether the kernel is running under a hypervisor.
auto	arch::s390x::cpu::processor::set_prefix (const u32 prefix) noexcept -> void
	Set Prefix (SPX) — loads a new value into the Prefix Register.

Detailed Description

cpu synchronization

some miscellaneous srtuff

SPDX-License-Identifier: Apache-2.0

Function Documentation

cpu_addr()

auto arch::s390x::cpu::processor::cpu_addr ( ) ->u16

exportnoexcept

Store CPU Address (STAP) — returns the hardware CPU address.

Returns

The hardware CPU address used with SIGP instructions.

get_prefix()

auto arch::s390x::cpu::processor::get_prefix ( ) ->u32

exportnoexcept

Store Prefix (STPX) — returns the physical address in the Prefix Register.

Returns

Physical base address of the current CPU's lowcore.

is_hypervisor()

auto arch::s390x::cpu::processor::is_hypervisor ( ) ->bool

exportnoexcept

Probe whether the kernel is running under a hypervisor.

Returns

true if the kernel is running under a hypervisor.

set_prefix()

auto arch::s390x::cpu::processor::set_prefix ( const u32 prefix ) ->void

exportnoexcept

Set Prefix (SPX) — loads a new value into the Prefix Register.

Parameters

prefix

New physical base address (must be 4 KB aligned).