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pub struct Control {
bits: u32,
}
impl Control {
pub fn bits(&self) -> u32 {
self.bits
}
pub fn npriv(&self) -> Npriv {
if self.bits & (1 << 0) == (1 << 0) {
Npriv::Unprivileged
} else {
Npriv::Privileged
}
}
pub fn spsel(&self) -> Spsel {
if self.bits & (1 << 1) == (1 << 1) {
Spsel::Psp
} else {
Spsel::Msp
}
}
pub fn fpca(&self) -> Fpca {
if self.bits & (1 << 2) == (1 << 2) {
Fpca::Active
} else {
Fpca::NotActive
}
}
}
#[derive(Clone, Copy, Eq, PartialEq)]
pub enum Npriv {
Privileged,
Unprivileged,
}
impl Npriv {
pub fn is_privileged(&self) -> bool {
*self == Npriv::Privileged
}
pub fn is_unprivileged(&self) -> bool {
*self == Npriv::Unprivileged
}
}
#[derive(Clone, Copy, Eq, PartialEq)]
pub enum Spsel {
Msp,
Psp,
}
impl Spsel {
pub fn is_msp(&self) -> bool {
*self == Spsel::Msp
}
pub fn is_psp(&self) -> bool {
*self == Spsel::Psp
}
}
#[derive(Clone, Copy, Eq, PartialEq)]
pub enum Fpca {
Active,
NotActive,
}
impl Fpca {
pub fn is_active(&self) -> bool {
*self == Fpca::Active
}
pub fn is_not_active(&self) -> bool {
*self == Fpca::NotActive
}
}
#[inline(always)]
pub fn read() -> Control {
let r: u32;
unsafe {
asm!("mrs $0, CONTROL"
: "=r"(r)
:
:
: "volatile");
}
Control { bits: r }
}