Enum cortex_a::registers::TCR_EL2::TBI::Value

#[repr(u64)]
pub enum Value {
    Used,
    Ignored,
}

Top Byte ignored - indicates whether the top byte of an address is used for address match for the TTBR0_EL2 region, or ignored and used for tagged addresses. Defined values are:

0 Top Byte used in the address calculation.

1 Top Byte ignored in the address calculation.

This affects addresses generated in EL2 using AArch64 where the address would be translated by tables pointed to by TTBR0_EL2. It has an effect whether the EL2, or EL2&0, translation regime is enabled or not.

If ARMv8.3-PAuth is implemented and TCR_EL2.TBID1 is 1, then this field only applies to Data accesses.

If the value of TBI is 1, then bits[63:56] of that target address are also set to 0 before the address is stored in the PC, in the following cases:

• A branch or procedure return within EL2. • An exception taken to EL2. • An exception return to EL2.

Variants

Used

Ignored

Trait Implementations

impl TryFromValue<u64> for Value

type EnumType = Value

fn try_from(v: u64) -> Option<Self::EnumType>