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Notify dispatch and GPE handlers (M21.2)

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The AML interpreter now handles the Notify opcode (0x86, previously
unhandled): it resolves the target device, evaluates the code, and
records the pair in a bounded per-evaluate queue the caller drains with
takeNotifications. A host unit test with hand-encoded AML — a method that
issues Notify(DEV_, 0x80) — proves the device and code come back; aml.zig
joins the zig build test loop so the interpreter is covered on the host.

The acpi service's SCI handler now services general-purpose events too:
for each set-and-enabled GPE bit it evaluates the \_GPE._Lxx (level) or
_Exx (edge) handler method, drains the Notify queue that produced, and
publishes a domain event per notified device — PNP0C0A battery, ACPI0003
AC, PNP0C0D lid, else generic notify — then clears the status bit and
acks. The embedded controller's _Qxx queries are out of scope (hardware
track). QEMU raises no GPEs on this config, so the QEMU suite is the
regression net (the power button still works with GPE servicing in the
path); correctness is the unit test. Suite 59/59.
This commit is contained in:
Daniel Samson
2026-07-13 05:44:58 +01:00
parent 1f2c60b3ec
commit 767a2a9a7c
8 changed files with 197 additions and 59 deletions
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system/drivers/ps2-bus/mouse.zig
+10 -10
View File
@@ -51,50 +51,50 @@ pub fn main(init: runtime.process.Init) void {
const hid = init.arguments.get(1).?;
if (hid.len == 0) {
_ = runtime.system.write("system/drivers/ps2-bus/mouse: no HID argument\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: no HID argument\n");
return;
}
writeLine("system/drivers/ps2-bus/mouse: starting for hid {s}\n", .{hid});
writeLine("/system/drivers/ps2-bus/mouse: starting for hid {s}\n", .{hid});
const buffer = runtime.allocator().alloc(device.DeviceDescriptor, 64) catch {
_ = runtime.system.write("system/drivers/ps2-bus/mouse: out of memory\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: out of memory\n");
return;
};
if (device.findDeviceDescriptorByHid(buffer, hid) == null) {
writeLine("system/drivers/ps2-bus/mouse: no device for hid {s}\n", .{hid});
writeLine("/system/drivers/ps2-bus/mouse: no device for hid {s}\n", .{hid});
return;
}
// Attach to the bus: hand it our endpoint, and it forwards every byte the
// mouse sends (it owns the controller; we own the decoding).
const bus = lookupBus() orelse {
_ = runtime.system.write("system/drivers/ps2-bus/mouse: ps2-bus service unavailable\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: ps2-bus service unavailable\n");
return;
};
const endpoint = ipc.createIpcEndpoint() orelse {
_ = runtime.system.write("system/drivers/ps2-bus/mouse: no endpoint\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: no endpoint\n");
return;
};
var attach = ps2.AttachRequest{ .device_type = @intFromEnum(ps2.DeviceType.mouse) };
var attach_reply: [@sizeOf(ps2.AttachReply)]u8 = undefined;
const attached = ipc.callCap(bus, std.mem.asBytes(&attach), &attach_reply, endpoint) catch {
_ = runtime.system.write("system/drivers/ps2-bus/mouse: attach call failed\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: attach call failed\n");
return;
};
if (attached.len < @sizeOf(ps2.AttachReply) or
std.mem.bytesToValue(ps2.AttachReply, attach_reply[0..@sizeOf(ps2.AttachReply)]).status != @intFromEnum(ps2.AttachStatus.ok))
{
_ = runtime.system.write("system/drivers/ps2-bus/mouse: attach refused\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: attach refused\n");
return;
}
// Broadcast mouse events through the input service so programs can listen
// for them (docs/input.md).
var source = runtime.input.connectSource() orelse {
_ = runtime.system.write("system/drivers/ps2-bus/mouse: input service unavailable\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: input service unavailable\n");
return;
};
_ = runtime.system.write("system/drivers/ps2-bus/mouse: ok\n");
_ = runtime.system.write("/system/drivers/ps2-bus/mouse: ok\n");
var assembler = mouse_packet.Assembler{};
var buttons: u32 = 0;