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//! vstopi register — Virtual Supervisor Top Priority Interrupt (0xEB0)
read_only_csr! {
/// Virtual Supervisor Top Priority Interrupt Register
Vstopi: 0xEB0,
mask: 0x0FFF_00FF,
}
read_only_csr_field! {
Vstopi,
/// Interrupt ID (bits 16..27)
///
/// Identifies the specific interrupt source. A value of 0 indicates no interrupt is pending.
/// Non-zero values correspond to specific interrupt sources as defined by the interrupt controller.
iid: [16:27],
}
read_only_csr_field! {
Vstopi,
/// Interrupt Priority ID (bits 0..7)
///
/// Represents the priority level of the pending interrupt.
/// Lower numerical values indicate higher priority interrupts.
iprio: [0:7],
}
impl Vstopi {
/// Returns true if there is a valid interrupt pending
///
/// When this returns true, both `interrupt_id()` and `priority()` will return meaningful values.
#[inline]
pub fn is_interrupt_pending(&self) -> bool {
self.iid() != 0
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_vstopi_fields() {
let vstopi = Vstopi::from_bits(0);
test_ro_csr_field!(vstopi, iid: [16, 27], 0x0);
test_ro_csr_field!(vstopi, iprio: [0, 7], 0x0);
let vstopi = Vstopi::from_bits((0xB << 16) | 5);
test_ro_csr_field!(vstopi, iid: [16, 27], 0xB);
test_ro_csr_field!(vstopi, iprio: [0, 7], 0x5);
let vstopi = Vstopi::from_bits((0xFFF << 16) | 0xFF);
test_ro_csr_field!(vstopi, iid: [16, 27], 0xFFF);
test_ro_csr_field!(vstopi, iprio: [0, 7], 0xFF);
let vstopi = Vstopi::from_bits(1 << 16);
test_ro_csr_field!(vstopi, iid: [16, 27], 0x1);
test_ro_csr_field!(vstopi, iprio: [0, 7], 0x0);
let vstopi = Vstopi::from_bits(1);
test_ro_csr_field!(vstopi, iid: [16, 27], 0x0);
test_ro_csr_field!(vstopi, iprio: [0, 7], 0x1);
}
#[test]
fn test_vstopi_bitmask() {
let vstopi = Vstopi::from_bits(usize::MAX);
assert_eq!(vstopi.bits(), 0x0FFF_00FFusize);
}
}