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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/amd64/int.zig
+17
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@@ -3,6 +3,7 @@ const std = @import("std");
const r = @import("root");
const ke = r.ke;
const ki = ke.private;
const pl = r.pl;
extern const __interrupt_vectors: [256]usize;
@@ -44,6 +45,8 @@ const exception_msg = [32][]const u8{
};
export fn isr_handler_main(frame: *const amd64.IrqFrame) callconv(.{ .x86_64_sysv = .{} }) void {
const ipl = ke.ipl.set_hardware(.Device);
if (frame.intno < 32) {
std.log.err("Unhandled exception: 0x{x} ({s}), err=0x{x}, pc=0x{x}", .{ frame.intno, exception_msg[frame.intno], frame.errcode, frame.rip });
std.log.err("RAX=0x{x:0>16} RBX=0x{x:0>16} RCX=0x{x:0>16} RDX=0x{x:0>16}", .{ frame.rax, frame.rbx, frame.rcx, frame.rdx });
@@ -75,6 +78,20 @@ export fn isr_handler_main(frame: *const amd64.IrqFrame) callconv(.{ .x86_64_sys
ki.panic.panic_with_frame("Unhandled exception", frame.rbp);
}
if (frame.intno == 32) {
ki.timer.clock();
}
if (frame.intno >= 32) {
pl.impl.apic.eoi();
}
ki.impl.set_hardware_ipl(ipl);
if (@intFromEnum(ipl) < @intFromEnum(ke.Ipl.get_max_software()) and ki.ipl.is_softint_pending(.Dispatch)) {
ki.dpc.dispatch(ke.cpu.current());
}
}
extern fn idt_load(idt_ptr: *const amd64.Idtr) callconv(.{ .x86_64_sysv = .{} }) void;