arch.s390x.mmu.consts Module Reference

Functions
template<dat_level Level> requires (Level != dat_level::page)
constexpr auto	arch::s390x::mmu::asce_type_code () noexcept -> u64
	ASCE type code for a given root level.
constexpr auto	arch::s390x::mmu::pte_frame (u64 val) noexcept -> u64
constexpr auto	arch::s390x::mmu::pte_is_invalid (u64 val) noexcept -> bool
constexpr auto	arch::s390x::mmu::pte_make (u64 phys, page_prot prot) noexcept -> u64
	Construct a valid PTE from physical frame + protection.
constexpr auto	arch::s390x::mmu::r3_is_large (u64 val) noexcept -> bool
constexpr auto	arch::s390x::mmu::r3_large_make (u64 phys, page_prot prot) noexcept -> u64
	Construct a 2 GiB large-page region-3 entry (RTTE FC=1, EDAT-2).
template<dat_level Level> requires (Level != dat_level::page)
constexpr auto	arch::s390x::mmu::rste_empty () noexcept -> u64
	Invalid (empty) entry value for a CRST table at a given level.
constexpr auto	arch::s390x::mmu::rste_empty_rt (dat_level lvl) noexcept -> u64
	Runtime empty-entry value.
constexpr auto	arch::s390x::mmu::rste_is_invalid (u64 val) noexcept -> bool
template<dat_level Level> requires (Level != dat_level::page)
constexpr auto	arch::s390x::mmu::rste_make (u64 child_phys) noexcept -> u64
	Construct a valid CRST entry pointing to a child table.
constexpr auto	arch::s390x::mmu::rste_make_rt (dat_level lvl, u64 child_phys) noexcept -> u64
	Runtime CRST entry construction.
constexpr auto	arch::s390x::mmu::rste_origin (u64 val) noexcept -> u64
template<dat_level Level> requires (Level != dat_level::page)
constexpr auto	arch::s390x::mmu::rste_type_code () noexcept -> u64
	CRST type code for a given dat_level.
constexpr auto	arch::s390x::mmu::rste_type_code_rt (dat_level lvl) noexcept -> u64
	Runtime CRST type code.
constexpr auto	arch::s390x::mmu::seg_is_large (u64 val) noexcept -> bool
constexpr auto	arch::s390x::mmu::seg_large_make (u64 phys, page_prot prot) noexcept -> u64
	Construct a 1 MiB large-page segment entry (STE FC=1, EDAT-1).

Variables
constexpr u64	arch::s390x::mmu::ASCE_ALT_EVENT = 0x080ULL
	PoP bit 56: S.
constexpr u64	arch::s390x::mmu::ASCE_LENGTH_MASK = 0x003ULL
	PoP bits 62-63: TL.
constexpr u64	arch::s390x::mmu::ASCE_ORIGIN_MASK = ~0xFFFULL
	PoP bits 0-51.
constexpr u64	arch::s390x::mmu::ASCE_PRIVATE = 0x100ULL
	PoP bit 55: P.
constexpr u64	arch::s390x::mmu::ASCE_REAL_SPACE = 0x020ULL
	PoP bit 58: R.
constexpr u64	arch::s390x::mmu::ASCE_SPACE_SWITCH = 0x040ULL
	PoP bit 57: X.
constexpr u64	arch::s390x::mmu::ASCE_SUBSPACE_GROUP = 0x200ULL
	PoP bit 54: G.
constexpr u64	arch::s390x::mmu::ASCE_TYPE_MASK = 0x00CULL
	PoP bits 60-61: DT.
constexpr u64	arch::s390x::mmu::ASCE_TYPE_R1 = 0x00CULL
	DT=11: region-first.
constexpr u64	arch::s390x::mmu::ASCE_TYPE_R2 = 0x008ULL
	DT=10: region-second.
constexpr u64	arch::s390x::mmu::ASCE_TYPE_R3 = 0x004ULL
	DT=01: region-third.
constexpr u64	arch::s390x::mmu::ASCE_TYPE_SEG = 0x000ULL
	DT=00: segment.
constexpr page_prot	arch::s390x::mmu::PAGE_KERNEL_RO {PTE_PROTECT | PTE_NOEXEC}
	RO, NX.
constexpr page_prot	arch::s390x::mmu::PAGE_KERNEL_RW {PTE_NOEXEC}
	RW, NX.
constexpr page_prot	arch::s390x::mmu::PAGE_KERNEL_RWX {0}
	RWX (avoid).
constexpr page_prot	arch::s390x::mmu::PAGE_KERNEL_RX {PTE_PROTECT}
	RO, X (code).
constexpr u64	arch::s390x::mmu::PTE_BIT52_ZERO = 0x800ULL
	PoP bit 52: must be zero in PTE.
constexpr u64	arch::s390x::mmu::PTE_EMPTY = PTE_INVALID
	Empty (invalid) PTE — used to initialize page tables.
constexpr u64	arch::s390x::mmu::PTE_IEP = 0x100ULL
	PoP bit 55: IEP control.
constexpr u64	arch::s390x::mmu::PTE_INVALID = 0x400ULL
	PoP bit 53: page-invalid.
constexpr u64	arch::s390x::mmu::PTE_NOEXEC = PTE_IEP
	Alias: IEP bit doubles as no-execute for kernel page_prot.
constexpr u64	arch::s390x::mmu::PTE_ORIGIN_MASK = ~0xFFFULL
	PoP bits 0-51: PFRA.
constexpr u64	arch::s390x::mmu::PTE_PROTECT = 0x200ULL
	PoP bit 54: DAT-protection.
constexpr u64	arch::s390x::mmu::R3_FC = 0x400ULL
	RTTE format-control bit (PoP bit 53) — EDAT-2 2 GiB direct mapping.
constexpr u64	arch::s390x::mmu::R3_LARGE = R3_FC
	Alias for R3_FC.
constexpr u64	arch::s390x::mmu::R3_LARGE_ORIGIN = ~0x7FFFFFFFULL
	2 GiB-aligned RFAA mask: PoP bits 0-32, 31 zeros appended.
constexpr u64	arch::s390x::mmu::RSTE_COMMON = 0x010ULL
	PoP bit 59: CS/CR (common segment/region).
constexpr u64	arch::s390x::mmu::RSTE_IEP = 0x100ULL
	PoP bit 55: IEP (FC=1 only).
constexpr u64	arch::s390x::mmu::RSTE_INVALID = 0x020ULL
	PoP bit 58: invalid.
constexpr u64	arch::s390x::mmu::RSTE_LENGTH_FULL = 0x003ULL
	Table length — full 2048 entries (PoP bits 62-63 = 0b11). Table size = (TL+1) × 4096 bytes = (TL+1) × 512 entries.
constexpr u64	arch::s390x::mmu::RSTE_NOEXEC = RSTE_IEP
	Alias: IEP bit doubles as no-execute for kernel page_prot.
constexpr u64	arch::s390x::mmu::RSTE_ORIGIN_MASK = ~0xFFFULL
	Origin mask for region-table entries: PoP bits 0-51, 12 zeros.
constexpr u64	arch::s390x::mmu::RSTE_PROTECT = 0x200ULL
	PoP bit 54: DAT-protection.
constexpr u64	arch::s390x::mmu::RSTE_TABLE_OFF_MASK = 0x0C0ULL
	PoP bits 56-57: table offset (TF).
constexpr u64	arch::s390x::mmu::RSTE_TYPE_MASK = 0x00CULL
	PoP bits 60-61: table type (TT).
constexpr u64	arch::s390x::mmu::RSTE_TYPE_R1 = 0x00CULL
	TT=11: region-first table.
constexpr u64	arch::s390x::mmu::RSTE_TYPE_R2 = 0x008ULL
	TT=10: region-second table.
constexpr u64	arch::s390x::mmu::RSTE_TYPE_R3 = 0x004ULL
	TT=01: region-third table.
constexpr u64	arch::s390x::mmu::RSTE_TYPE_SG = 0x000ULL
	TT=00: segment table.
constexpr u64	arch::s390x::mmu::SEG_FC = 0x400ULL
	STE format-control bit (PoP bit 53) — EDAT-1 1 MiB direct mapping.
constexpr u64	arch::s390x::mmu::SEG_LARGE = SEG_FC
	Alias for SEG_FC.
constexpr u64	arch::s390x::mmu::SEG_LARGE_ORIGIN = ~0xFFFFFULL
	1 MiB-aligned SFAA mask: PoP bits 0-43, 20 zeros appended.
constexpr u64	arch::s390x::mmu::STE_PTO_MASK = ~0x7FFULL
	Origin mask for segment-table PTO: PoP bits 0-52, 11 zeros. The STE page-table origin includes one more bit than CRST origins.

Files
file	arch/s390x/mmu/consts.cxxm