arch::s390x::io::orb Struct Reference

Operation Request Block — input to SSCH instruction. More...

Public Member Functions
constexpr auto	set_cpa (u32 addr) noexcept -> void
	Set the Channel Program Address (word 2, 31-bit physical).
constexpr auto	set_format1 () noexcept -> void
	Set Format-1 CCW bit (bit 8 of word 1).
constexpr auto	set_key (u8 key) noexcept -> void
	Set the storage key in bits 0-3 of word 1.
constexpr auto	set_lpm (u8 lpm) noexcept -> void
	Set the Logical Path Mask (bits 16-23 of word 1).

Data Fields
u32	_reserved3 {0}
	Word 3: CSS priority (reserved for us).
u32	_reserved4 {0}
	Word 4.
u32	_reserved5 {0}
	Word 5.
u32	_reserved6 {0}
	Word 6.
u32	_reserved7 {0}
	Word 7.
u32	cpa {0}
	Word 2: Channel Program Address (31-bit).
u32	ctrl {0}
	Word 1: Key + control flags + LPM + ILS.
u32	intparm {0}
	Word 0: Interruption parameter.

Detailed Description

Operation Request Block — input to SSCH instruction.

PoP §14.3.3 / Linux arch/s390/include/asm/cio.h. Word 1 layout (big-endian, bit 0 = MSB): key(0-3) | S(4) | C(5) | M(6) | Y(7) | F(8) | P(9) | I(10) | A(11) | U(12) | _(13) | H(14) | T(15) | LPM(16-23) | L(24) | _(25-30) | X(31)

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The documentation for this struct was generated from the following file:

• arch/s390x/io/types.cxxm