1 files changed, 117 insertions, 0 deletions
diff --git a/libgloss/sparc_leon/catch_interrupt.c b/libgloss/sparc_leon/catch_interrupt.c
new file mode 100644
index 000000000..f55defaa6
--- /dev/null
+++ b/libgloss/sparc_leon/catch_interrupt.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2011 Aeroflex Gaisler
+ *
+ * BSD license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#include <asm-leon/leonstack.h>
+#include <asm-leon/irq.h>
+#define NULL 0
+struct irqaction *_irqtbl[32] =
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+0, 0, 0, 0, 0, 0, 0 };
+struct irqaction _oirqtbl[32] =
+  { INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
+  INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION
+};
+
+int
+catch_interrupt (int func, int irq)
+{
+  struct irqaction *a = _irqtbl[irq];
+  struct irqaction *n = &_oirqtbl[irq];
+  if (irq >= 32)
+    return 0;
+
+  while (a)
+    {
+      if (a == n)
+	{
+	  int tmp = (int) a->handler;
+	  a->handler = (irqhandler) func;
+	  return tmp;
+	}
+      a = a->next;
+    }
+  n->handler = (irqhandler) func;
+  chained_catch_interrupt (irq, n);
+  return 0;
+}
+
+void
+chained_catch_interrupt (int irq, struct irqaction *a)
+{
+  a->next = _irqtbl[irq];
+  _irqtbl[irq] = a;
+}
+
+int no_inirq_check = 0;
+int inirq[32] = { 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0
+};
+extern struct irqmp_type irqmp;
+
+void (*handler_irq_pre) (void) = 0;
+void (*handler_irq_post) (void) = 0;
+handler_irq (int irq, struct leonbare_pt_regs *pt_regs)
+{
+  struct irqaction *a;
+
+  if (irq == irqmp.eirq)
+    irq = irqmp.addr[48] & 0x1f;
+  if (!irq)
+    irq = irqmp.eirq;
+
+  a = _irqtbl[irq];
+
+  while (a)
+    {
+      if (a->handler)
+	{
+#ifndef CONFIG_LEONBARE_NONESTEDIRQ
+	  if (no_inirq_check || !(inirq[irq]))
+	    {
+#endif
+	      inirq[irq]++;
+	      if (handler_irq_pre)
+		handler_irq_pre ();
+	      a->handler (irq, a->dev_id, pt_regs);
+	      if (handler_irq_post)
+		handler_irq_post ();
+	      inirq[irq]--;
+#ifndef CONFIG_LEONBARE_NONESTEDIRQ
+	    }
+#endif
+	}
+      a = a->next;
+    }
+}
+
+schedulehandler schedule_callback = 0;