Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / openrisc / cpu / exceptions.c

diff --git a/qemu/roms/u-boot/arch/openrisc/cpu/exceptions.c b/qemu/roms/u-boot/arch/openrisc/cpu/exceptions.c
new file mode 100644 (file)
index 0000000..b339997
--- /dev/null
+++ b/qemu/roms/u-boot/arch/openrisc/cpu/exceptions.c
@@ -0,0 +1,72 @@
+/*
+ * (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
+ * (C) Copyright 2011, Julius Baxter <julius@opencores.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#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);
+}