Enum cortex_a::registers::SPSR_EL3::M::Value

#[repr(u64)]
pub enum Value {
    EL0t,
    EL1t,
    EL1h,
    EL2t,
    EL2h,
}

AArch64 state (Exception level and selected SP) that an exception was taken from. The possible values are:

M[3:0] | State

0b0000 | EL0t 0b0100 | EL1t 0b0101 | EL1h 0b1000 | EL2t 0b1001 | EL2h

Other values are reserved, and returning to an Exception level that is using AArch64 with a reserved value in this field is treated as an illegal exception return.

The bits in this field are interpreted as follows:

• M[3:2] holds the Exception Level.
• M[1] is unused and is RES 0 for all non-reserved values.
• M[0] is used to select the SP:
  • 0 means the SP is always SP0.
  • 1 means the exception SP is determined by the EL.

Variants

EL0t

EL1t

EL1h

EL2t

EL2h

Trait Implementations

impl TryFromValue<u64> for Value

type EnumType = Value

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