openrisc: Add cpu files
Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
diff --git a/arch/openrisc/cpu/exceptions.c b/arch/openrisc/cpu/exceptions.c
new file mode 100644
index 0000000..5d9f117
--- /dev/null
+++ b/arch/openrisc/cpu/exceptions.c
@@ -0,0 +1,85 @@
+/*
+ * (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
+ * (C) Copyright 2011, Julius Baxter <julius@opencores.org>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <stdio_dev.h>
+#include <asm/system.h>
+
+static const char * const excp_table[] = {
+ "Unknown exception",
+ "Reset",
+ "Bus Error",
+ "Data Page Fault",
+ "Instruction Page Fault",
+ "Tick Timer",
+ "Alignment",
+ "Illegal Instruction",
+ "External Interrupt",
+ "D-TLB Miss",
+ "I-TLB Miss",
+ "Range",
+ "System Call",
+ "Floating Point",
+ "Trap",
+};
+
+static void (*handlers[32])(void);
+
+void exception_install_handler(int exception, void (*handler)(void))
+{
+ if (exception < 0 || exception > 31)
+ return;
+
+ handlers[exception] = handler;
+}
+
+void exception_free_handler(int exception)
+{
+ if (exception < 0 || exception > 31)
+ return;
+
+ handlers[exception] = 0;
+}
+
+static void exception_hang(int vect)
+{
+ printf("Unhandled exception at 0x%x ", vect & 0xff00);
+
+ vect = ((vect >> 8) & 0xff);
+ if (vect < ARRAY_SIZE(excp_table))
+ printf("(%s)\n", excp_table[vect]);
+ else
+ printf("(%s)\n", excp_table[0]);
+
+ printf("EPCR: 0x%08lx\n", mfspr(SPR_EPCR_BASE));
+ printf("EEAR: 0x%08lx\n", mfspr(SPR_EEAR_BASE));
+ printf("ESR: 0x%08lx\n", mfspr(SPR_ESR_BASE));
+ hang();
+}
+
+void exception_handler(int vect)
+{
+ int exception = vect >> 8;
+
+ if (handlers[exception])
+ handlers[exception]();
+ else
+ exception_hang(vect);
+}