thermosphere: handle physical IRQs

thermosphere/src/irq.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "gicv2.h"
+#include "spinlock.h"
+#include "exceptions.h"
+#include "utils.h"
+
+typedef struct IrqManager {
+    RecursiveSpinlock lock;
+    ArmGicV2 gic;
+    u8 numPriorityLevels;
+    u8 numCpuInterfaces;
+    u8 numSharedInterrupts;
+    // Note: we don't store interrupt handlers since we will handle some SGI + uart interrupt(s)...
+} IrqManager;
+
+extern IrqManager g_irqManager;
+
+void initIrq(void);
+void handleIrqException(ExceptionStackFrame *frame, bool isLowerEl, bool isA32);
+
+static inline void generateSgiForAllOthers(u32 id)
+{
+    g_irqManager.gic.gicd->sgir = (1 << 24) | (id & 0xF);
+}
+
+static inline void generateSgiForSelf(u32 id)
+{
+    g_irqManager.gic.gicd->sgir = (2 << 24) | (id & 0xF);
+}
+
+static inline void generateSgiForList(u32 id, u32 list)
+{
+    g_irqManager.gic.gicd->sgir = (0 << 24) | (list << 16) | (id & 0xF);
+}
+
+static inline void generateSgiForAll(u32 id)
+{
+    generateSgiForList(id, MASK(g_irqManager.numCpuInterfaces));
+}