From fdd0d73ec56fbbfe9c1cf05892828c9833d725da Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 20 May 2011 00:21:26 +0000
Subject: [PATCH] Add PIC32 exception handlers

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3630 42af7a65-404d-4744-a932-0658087f49c3
---
 configs/pcblogic-pic32mx/ostest/ld.script | 62 +++++++++++++++++++----
 1 file changed, 52 insertions(+), 10 deletions(-)

diff --git a/configs/pcblogic-pic32mx/ostest/ld.script b/configs/pcblogic-pic32mx/ostest/ld.script
index 300273405c9..7c8f11a1f15 100644
--- a/configs/pcblogic-pic32mx/ostest/ld.script
+++ b/configs/pcblogic-pic32mx/ostest/ld.script
@@ -49,20 +49,32 @@ MEMORY
 	 *   REGION        PHYSICAL   KSEG   SIZE
 	 *   DESCRIPTION   START ADDR        (BYTES)
 	 *   ------------- ---------- ------ ---------------
-	 *   Reset         0x1fc00000 KSEG1  896
-	 *   BEV exception 0x1fc00380 KSEG1  256
-	 *   DBG exception 0x1fc00480 KSEG1  16
+	 *   Exceptions:*
+	 *     Reset       0x1fc00000 KSEG1  512
+	 *     TLB Refill  0x1fc00200 KSEG1  256
+	 *     Cache Error 0x1fc00300 KSEG1  256
+	 *     Others      0x1fc00380 KSEG1  256
+	 *     Interrupt   0x1fc00400 KSEG1  128
+	 *     JTAG        0x1fc00480 KSEG1  16
 	 *   Startup logic 0x1fc00490 KSEG0  4096-896-256-16
 	 *   Exceptions    0x1fc01000 KSEG0  4096
 	 *   Debug code    0x1fc02000 KSEG1  4096-16
 	 *   DEVCFG3-0     0x1fc02ff0 KSEG1  16
+	 *
+	 * Exceptions assme:
+	 *
+	 *   STATUS: BEV=1 and EXL=0
+	 *   CAUSE:  IV=1
+	 *   JTAG:   ProbEn=0
+	 *   And multi-vector support disabled
 	 */
 
 	kseg1_reset    (rx) : ORIGIN = 0xbfc00000, LENGTH = 896
 	kseg1_bevexcpt (rx) : ORIGIN = 0xbfc00380, LENGTH = 256
-	kseg1_dbgexcpt (rx) : ORIGIN = 0xbfc00480, LENGTH = 16
+	kseg1_intexcpt (rx) : ORIGIN = 0xbfc00380, LENGTH = 128
+	kseg1_dbgexcpt (rx) : ORIGIN = 0xbfc00400, LENGTH = 128
 	kseg0_bootmem  (rx) : ORIGIN = 0x9fc00490, LENGTH = 4096-1168
-	kseg0_exptmem  (rx) : ORIGIN = 0x9fc01000, LENGTH = 4096
+	kseg0_excptmem (rx) : ORIGIN = 0x9fc01000, LENGTH = 4096
 	kseg1_dbgcode  (rx) : ORIGIN = 0xbfc02000, LENGTH = 4096-16
 	kseg1_devcfg    (r) : ORIGIN = 0xbfc02ff0, LENGTH = 16
 
@@ -78,6 +90,9 @@ OUTPUT_FORMAT("elf32-tradlittlemips")
 OUTPUT_ARCH(pic32mx)
 ENTRY(__start)
 
+INPUT(up_inthandler.o);
+INPUT(up_bevhandler.o);
+
 SECTIONS
 {
 	/* Boot FLASH sections */
@@ -87,11 +102,35 @@ SECTIONS
 		*(.reset)
 	} > kseg1_reset
 
-	.bev_excp :
+	/* Exception handlers.  The following is assumed:
+	 *
+	 *   STATUS: BEV=1 and EXL=0
+	 *   CAUSE:  IV=1
+	 *   JTAG:   ProbEn=0
+	 *   And multi-vector support disabled
+	 *
+	 * In that configuration, the vector locations become:
+	 *
+	 *   Reset, Soft Reset  bfc0:0000
+	 *   TLB Refill         bfc0:0200
+	 *   Cache Error        bfc0:0300
+	 *   All others         bfc0:0380
+	 *   Interrupt          bfc0:0400
+	 *   EJTAG Debug        bfc0:0480
+	 */
+
+	 /* KSEG1 exception handler "trampolines" */
+
+	.bev_excpt :
 	{
-		*(.bev_excp)
+		*(.bev_excpt)
 	} > kseg1_bevexcpt
 
+	.int_excpt :
+	{
+		*(.int_excpt)
+	} > kseg1_intexcpt
+
 	.dbg_excpt = ORIGIN(kseg1_dbgexcpt);
 
 	.start :
@@ -99,10 +138,13 @@ SECTIONS
 		*(.start)
 	} > kseg0_bootmem
 
-	.vectors :
+	 /* KSEG0 exception handlers */
+
+	.excpt_handlers :
 	{
-		*(.vectors)
-	} > kseg0_exptmem
+		*(.bev_handler)
+		*(.int_handler)
+	} > kseg0_excptmem
 
 	.dbg_code = ORIGIN(kseg1_dbgcode);