Slightly more refined interrupt methods

devices/ioctrl/interruptctrl.h

@@ -0,0 +1,61 @@
+/*
+DingusPPC - The Experimental PowerPC Macintosh emulator
+Copyright (C) 2018-21 divingkatae and maximum
+                      (theweirdo)     spatium
+
+(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef HWINTERRUPT_H
+#define HWINTERRUPT_H
+
+#include <devices/common/hwcomponent.h>
+#include <cinttypes>
+#include <memory>
+
+class InterruptCtrl : public HWComponent {
+public:
+    InterruptCtrl();
+    ~InterruptCtrl() = default;
+
+    bool supports_type(HWCompType type) {
+        return (type == HWCompType::INT_CTRL);
+    };
+
+    uint32_t ack_interrupt(uint32_t device_bits);
+
+    //for all (Old World) PCI-based Macs (is_int is only for Heathrow)
+    void update_mask_flags(uint32_t bit_setting);
+    void update_events_flags(uint32_t bit_setting);
+    void update_levels_flags(uint32_t bit_setting);
+    void update_clear_flags(uint32_t bit_setting);
+    uint32_t retrieve_mask_flags();
+    uint32_t retrieve_events_flags();
+    uint32_t retrieve_levels_flags();
+    uint32_t retrieve_clear_flags();
+
+    //for Heathrow
+
+    void call_ppc_handler();
+
+private:
+    uint32_t int_events1 = 0;
+    uint32_t int_mask1   = 0;
+    uint32_t int_clear1  = 0;
+    uint32_t int_levels1 = 0;
+};
+
+#endif /* HWINTERRUPT_H */