From bbc99f1a6f0984a8cf68027328a0bfdf852721b5 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Mon, 7 May 2001 13:10:53 +0000
Subject: 2001-05-07	Joel Sherrill <joel@OARcorp.com>

	* shared/interrupts/vectorexceptions.c: New file to decode
	exception code and vector appropriate NON-interrupt exception.
	* shared/interrupts/Makefile.am: Modified to reflect above.
---
 c/src/lib/libcpu/mips/ChangeLog                    |  6 ++
 .../lib/libcpu/mips/shared/interrupts/Makefile.am  |  2 +-
 .../mips/shared/interrupts/vectorexceptions.c      | 90 ++++++++++++++++++++++
 3 files changed, 97 insertions(+), 1 deletion(-)
 create mode 100644 c/src/lib/libcpu/mips/shared/interrupts/vectorexceptions.c

(limited to 'c/src/lib/libcpu')

diff --git a/c/src/lib/libcpu/mips/ChangeLog b/c/src/lib/libcpu/mips/ChangeLog
index 17bfa04453..0759726250 100644
--- a/c/src/lib/libcpu/mips/ChangeLog
+++ b/c/src/lib/libcpu/mips/ChangeLog
@@ -1,3 +1,9 @@
+2001-05-07	Joel Sherrill <joel@OARcorp.com>
+
+	* shared/interrupts/vectorexceptions.c: New file to decode
+	exception code and vector appropriate NON-interrupt exception.	
+	* shared/interrupts/Makefile.am: Modified to reflect above.
+
 2001-04-20	Joel Sherrill <joel@OARcorp.com>
 
 	* mongoosev/duart/mg5uart.c (mg5uart_enable_interrupts): Honor
diff --git a/c/src/lib/libcpu/mips/shared/interrupts/Makefile.am b/c/src/lib/libcpu/mips/shared/interrupts/Makefile.am
index c1fb455e2f..866b0247a9 100644
--- a/c/src/lib/libcpu/mips/shared/interrupts/Makefile.am
+++ b/c/src/lib/libcpu/mips/shared/interrupts/Makefile.am
@@ -6,7 +6,7 @@ AUTOMAKE_OPTIONS = foreign 1.4
 
 PGM = $(ARCH)/interrupts.rel
 
-C_FILES = installisrentries.c maxvectors.c
+C_FILES = installisrentries.c maxvectors.c vectorexceptions.c
 
 S_FILES = isr_entries.S
 
diff --git a/c/src/lib/libcpu/mips/shared/interrupts/vectorexceptions.c b/c/src/lib/libcpu/mips/shared/interrupts/vectorexceptions.c
new file mode 100644
index 0000000000..708f9ffea8
--- /dev/null
+++ b/c/src/lib/libcpu/mips/shared/interrupts/vectorexceptions.c
@@ -0,0 +1,90 @@
+/*
+ *  ISR Vectoring support for the Synova Mongoose-V.
+ *
+ *  COPYRIGHT (c) 1989-2001.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+#include <stdlib.h>
+
+#define mips_get_cause( _cause ) \
+  do { \
+    asm volatile( "mfc0 %0, $13; nop" : "=r" (_cause) :  ); \
+  } while (0)
+
+#define CALL_ISR(_vector) \
+  do { \
+    if ( _ISR_Vector_table[_vector] ) \
+      (_ISR_Vector_table[_vector])(_vector); \
+    else \
+      mips_default_exception_code_handler(_vector); \
+  } while (0)
+
+#include <bspIo.h>  /* for printk */
+
+char *cause_strings[32] = {
+  /*  0 */ "Int",
+  /*  1 */ "TLB Mods",
+  /*  2 */ "TLB Load",
+  /*  3 */ "TLB Store",
+  /*  4 */ "Address Load",
+  /*  5 */ "Address Store",
+  /*  6 */ "Instruction Bus Error",
+  /*  7 */ "Data Bus Error",
+  /*  9 */ "Syscall",
+  /* 10 */ "Breakpoint",
+  /* 11 */ "Reserved Instruction",
+  /* 12 */ "Coprocessor Unuseable",
+  /* 13 */ "Overflow",
+  /* 14 */ "Trap",
+  /* 15 */ "Instruction Virtual Coherency Error",
+  /* 16 */ "FP Exception",
+  /* 17 */ "Reserved 17",
+  /* 18 */ "Reserved 17",
+  /* 19 */ "Reserved 17",
+  /* 20 */ "Reserved 20",
+  /* 21 */ "Reserved 21",
+  /* 22 */ "Reserved 22",
+  /* 23 */ "Watch",
+  /* 24 */ "Reserved 24",
+  /* 25 */ "Reserved 25",
+  /* 26 */ "Reserved 26",
+  /* 27 */ "Reserved 27",
+  /* 28 */ "Reserved 28",
+  /* 29 */ "Reserved 29",
+  /* 30 */ "Reserved 30",
+  /* 31 */ "Data Virtual Coherency Error"
+};
+
+void mips_default_exception_code_handler( int exc, CPU_Interrupt_frame *frame )
+{
+  unsigned int sr;
+  unsigned int cause;
+
+  mips_get_cause( cause );
+
+  printk( "Unhandled exception cause %d\n", exc );
+  printk( "sr: 0x%08x", sr );
+  printk( "cause: 0x%08x --> %s", cause, cause_strings[(cause >> 2) &0x1f] );
+  /* XXX dump frame once defined */
+  rtems_fatal_error_occurred(1);
+}
+
+void mips_vector_exceptions( CPU_Interrupt_frame *frame )
+{
+  unsigned int cause;
+  int          exc;
+
+  mips_get_cause( cause );
+  exc = (cause >> 2) &0x1f;
+
+  printk( "Exception!\n" );
+  mips_default_exception_code_handler( exc, frame );
+}
-- 
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