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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/platform/pc/smp.zig
+6 -3
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@@ -32,8 +32,7 @@ const ApData = extern struct {
};
fn ap_entry(cpu_id: u32) callconv(.c) noreturn {
_ = aps_booted.fetchAdd(1, .monotonic);
ki.impl.init.ap_entry(cpu_id);
ki.impl.init.ap_entry(cpu_id, &aps_booted);
}
pub fn init() linksection(r.init) void {
@@ -70,7 +69,7 @@ pub fn init() linksection(r.init) void {
ki.impl.cpu_offsets = @ptrCast(mm.zone.gpa.alloc(usize, apic.apics.items.len + 1) catch @panic("Failed to allocate AP local data offsets"));
const percpu_size = @intFromPtr(&__percpu_end) - @intFromPtr(&__percpu_start);
ki.impl.cpu_offsets[0] = @intFromPtr(&__percpu_start);
ki.impl.cpu_offsets[0] = 0;
cpu_id_to_apic_id[0] = apic.get_id();
@@ -89,8 +88,12 @@ pub fn init() linksection(r.init) void {
const cpu_data = mm.zone.gpa.alloc(u8, percpu_size) catch @panic("Failed to allocate per-cpu data");
@memcpy(cpu_data, @as([*]u8, @ptrCast(&__percpu_start))[0..percpu_size]);
const self_offset_offset = @intFromPtr(&ki.impl.cpu_self_offset) - @intFromPtr(&__percpu_start);
ki.impl.cpu_offsets[cpu_id] = @intFromPtr(cpu_data.ptr) -% @intFromPtr(&__percpu_start);
// copy the offset into the AP's self_offset variable
@as(*usize, @ptrCast(@alignCast(&cpu_data[self_offset_offset]))).* = ki.impl.cpu_offsets[cpu_id];
const stack_top = @intFromPtr(mm.heap.alloc(r.kib(16)) catch @panic("Failed to allocate AP stack")) + r.kib(16);
start_stack.remote(@intCast(cpu_id)).* = stack_top & ~@as(usize, 15);