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feat(pl/pc): add APIC timer support

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Loïc Grégoire
2026-04-18 11:18:33 -04:00
parent 1aa6743f43
commit a1db75746a
13 changed files with 175 additions and 48 deletions
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src/kern/um/impl.zig
+11 -9
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@@ -8,7 +8,10 @@ fn set_signals(enabled: bool) bool {
var newmask: c.sigset_t = undefined;
var oldmask: c.sigset_t = undefined;
_ = c.sigfillset(&newmask);
_ = c.sigemptyset(&newmask);
_ = c.sigaddset(&newmask, c.SIGUSR1);
_ = c.sigaddset(&newmask, c.SIGUSR2);
_ = c.sigaddset(&newmask, c.SIGALRM);
const how = if (enabled) c.SIG_UNBLOCK else c.SIG_BLOCK;
@@ -19,12 +22,13 @@ fn set_signals(enabled: bool) bool {
return c.sigismember(&oldmask, c.SIGUSR1) == 0;
}
threadlocal var hard_ipl: ke.Ipl = .Passive;
/// Set the hardware IPL.
pub fn set_hardware_ipl(ipl: ke.Ipl) void {
// This is a no-op since we handle this in enable_interrupts().
hard_ipl = ipl;
if (@intFromEnum(ipl) > @intFromEnum(ke.Ipl.get_max_software())) {
_ = disable_interrupts();
} else {
_ = enable_interrupts();
}
}
/// Disable interrupts and return the previous state.
@@ -34,14 +38,12 @@ pub fn disable_interrupts() bool {
/// Enable interrupts and return the previous state.
pub fn enable_interrupts() bool {
const ipl_allows_ints = @intFromEnum(hard_ipl) <= @intFromEnum(ke.Ipl.get_max_software());
return set_signals(ipl_allows_ints);
return set_signals(true);
}
/// Restore an interrupt state.
pub fn restore_interrupts(val: bool) void {
const ipl_allows_ints = @intFromEnum(hard_ipl) <= @intFromEnum(ke.Ipl.get_max_software());
_ = set_signals(val and ipl_allows_ints);
_ = set_signals(val);
}
pub fn send_resched_ipi(cpu: u32) void {