1 files changed, 76 insertions, 0 deletions
diff --git a/libgloss/sparc_leon/catch_interrupt_svt.c b/libgloss/sparc_leon/catch_interrupt_svt.c
new file mode 100644
index 000000000..065b5f1d3
--- /dev/null
+++ b/libgloss/sparc_leon/catch_interrupt_svt.c
@@ -0,0 +1,76 @@
+/*
+ * 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
+
+/* single vector trapping version of trap handler installs */
+struct svt_trap_entry
+{
+  int start, end, func;
+};
+extern struct svt_trap_entry trap_table[28];
+extern struct svt_trap_entry svt_trap_table_ext[17];
+extern struct svt_trap_entry svt_trap_table_ext_end;
+
+static struct svt_trap_entry *
+gettrap_pos (int nr)
+{
+  struct svt_trap_entry *p = trap_table;
+  while ((p->start) || (p->end) || (p->func))
+    {
+      if (p->start <= nr && p->end >= nr)
+	{
+	  break;
+	}
+      p++;
+    }
+  return p;
+}
+
+int
+svtloleveltrapinstall (int trap, void (*handler) ())
+{
+  struct svt_trap_entry *p = gettrap_pos (trap);
+  if (p >= &svt_trap_table_ext_end)
+    {
+      return 0;
+    }
+  p->start = trap;
+  p->end = trap;
+  p->func = handler;
+  return 1;
+}
+
+int
+svtlolevelirqinstall (int irqnr, void (*handler) ())
+{
+  if (irqnr == 0 || irqnr >= 15)
+    {
+      return 0;
+    }
+  return svtloleveltrapinstall (irqnr + 0x10, handler);
+}