Adding missing file

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Adding missing file
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
e8cc350d · Federico Vaga · d470470f · e8cc350d
Commit e8cc350d authored Aug 11, 2015 by Federico Vaga
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wrn-crt0.S applications/common/rt/wrn-crt0.S +144 -0

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--- a/applications/common/rt/wrn-crt0.S
+++ b/applications/common/rt/wrn-crt0.S
+/****************************************************************************
+**
+**  Name: crt0ram.S
+**
+**  Description:
+**        Implements boot-code that calls LatticeDDInit (that calls main())
+**        Implements exception handlers (actually, redirectors)
+**
+**  $Revision: $
+**
+** Disclaimer:
+**
+**   This source code is intended as a design reference which
+**   illustrates how these types of functions can be implemented.  It
+**   is the user's responsibility to verify their design for
+**   consistency and functionality through the use of formal
+**   verification methods.  Lattice Semiconductor provides no warranty
+**   regarding the use or functionality of this code.
+**
+** --------------------------------------------------------------------
+**
+**                     Lattice Semiconductor Corporation
+**                     5555 NE Moore Court
+**                     Hillsboro, OR 97214
+**                     U.S.A
+**
+**                     TEL: 1-800-Lattice (USA and Canada)
+**                          (503)268-8001 (other locations)
+**
+**                     web:   http://www.latticesemi.com
+**                     email: techsupport@latticesemi.com
+**
+** --------------------------------------------------------------------------
+**
+**  Change History (Latest changes on top)
+**
+**  Ver    Date        Description
+** --------------------------------------------------------------------------
+**  3.8   Apr-15-2011  Added __MICO_USER_<handler>_HANDLER__ preprocessor to 
+**                     allow customers to implement their own handlers for:
+**                     DATA_ABORT, INST_ABORT
+**  
+**  3.1   Jun-18-2008  Added __MICO_NO_INTERRUPTS__ preprocessor
+**                     option to exclude invoking MicoISRHandler
+**                     to reduce code-size in apps that don't use
+**                     interrupts
+**
+**  3.0   Mar-25-2008  Added Header
+**
+**---------------------------------------------------------------------------
+*****************************************************************************/
+
+/*
+ * LatticeMico32 C startup code.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* From include/sys/signal.h */  
+#define SIGINT  2   /* interrupt */
+#define SIGTRAP 5   /* trace trap */
+#define SIGFPE  8   /* arithmetic exception */
+#define SIGSEGV 11  /* segmentation violation */
+
+//#define MICO32_FULL_CONTEXT_SAVE_RESTORE
+
+
+/* Exception handlers - Must be 32 bytes long. */
+        .section    .boot, "ax", @progbits
+	
+        .global	_start  
+_start: 
+	   
+        .global _reset_handler
+        .type 	_reset_handler, @function
+_reset_handler:
+    xor r0, r0, r0
+    wcsr    IE, r0
+    wcsr    IM, r0
+    mvhi    r1, hi(_reset_handler)
+    ori     r1, r1, lo(_reset_handler)
+    wcsr    EBA, r1
+    calli   _crt0
+    nop
+        .size	_reset_handler, .-_reset_handler
+	
+.extern _irq_entry
+.org 0xc0
+        .global _interrupt_handler
+        .type 	_interrupt_handler, @function
+_interrupt_handler:
+		nop
+		
+.org 0x100
+        .global _crt0
+        .type 	_crt0, @function
+_crt0:
+    /* Clear r0 */
+    xor     r0, r0, r0
+    xor     r1, r1, r1
+    xor     r2, r2, r2
+    xor     r3, r3, r3
+
+    /* Setup stack and global pointer */
+    mvhi    sp, hi(_fstack)
+    ori     sp, sp, lo(_fstack)
+    mvhi    gp, hi(_gp)
+    ori     gp, gp, lo(_gp)
+	
+    mvhi    r1, hi(_fbss)
+    ori     r1, r1, lo(_fbss)
+    mvi     r2, 0
+    mvhi    r3, hi(_ebss)
+    ori     r3, r3, lo(_ebss)
+    sub     r3, r3, r1
+/*    calli   memset */
+    mvi     r1, 0
+    mvi     r2, 0
+    mvi     r3, 0
+    calli   main
+
+loopf:
+	bi loopf
+
+