Add PIC32 exception handlers

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3630 42af7a65-404d-4744-a932-0658087f49c3

arch/mips/src/common/up_internal.h

@@ -160,7 +160,6 @@ extern uint32_t _bmxdupba_address;  /* BMX register setting */
 
 extern void up_boot(void);
 extern void up_copystate(uint32_t *dest, uint32_t *src);
-extern void up_decodeirq(uint32_t *regs);
 extern void up_irqinitialize(void);
 #ifdef CONFIG_ARCH_DMA
 extern void weak_function up_dmainitialize(void);
@@ -171,6 +170,9 @@ extern void up_lowputc(char ch);
 extern void up_puts(const char *str);
 extern void up_lowputs(const char *str);
 
+/* Two alternative interrupt handling functions */
+
+extern uint32_t *up_decodeirq(uint32_t *regs);
 extern uint32_t *up_doirq(int irq, uint32_t *regs);
 
 /* Defined in up_dumpstate.c */

arch/mips/src/mips32/up_bevhandler.S

@@ -0,0 +1,103 @@
+/****************************************************************************
+ * arch/mips/src/mips32/up_bevexcptn.S
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <arch/mips32/registers.h>
+
+#include "chip/excptmacros.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+ 
+/****************************************************************************
+ * Global Symbols
+ ****************************************************************************/
+
+	.file	"up_bevexcptn.S"
+	.global	up_dobev
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+/****************************************************************************
+ * Name: _bev_exception
+ *
+ * Description:
+ *   Boot Exception Vector Handler.  Jumps to bev_handler
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   Does not return
+ *
+ ****************************************************************************/
+
+	.section .bev_excpt,"ax",@progbits
+	.set	noreorder
+	.ent	_bev_exception
+_bev_exception:
+	la		k0, _bev_handler
+	jr		k0
+	nop
+	.end _bev_exception
+			
+/****************************************************************************
+ * Name: _bev_handler
+ *
+ * Description:
+ *   BEV exception handler
+ *
+ ****************************************************************************/
+
+	.section .bev_handler, "ax", @progbits
+	.set	noreorder
+	.ent	_bev_handler
+_bev_handler:
+	EXCPT_PROLOGUE t0			/* Save registers on stack, enable nested interrupts */
+	move	a0, sp				/* Pass register save structure as the parameter 1 */
+	USE_INTSTACK t0, t1, t2		/* Switch to the interrupt stack */
+	la		t0, up_dobev		/* Call up_dobev(regs) */
+	jalr	t0, ra
+	di							/* Disable interrupts */
+	RESTORE_STACK t0, t1		/* Undo the operations of USE_STACK */
+	EXCPT_EPILOGUE v0			/* Return to the context returned by up_dobev() */
+	.end	_bev_handler

arch/mips/src/mips32/up_inthandler.S

@@ -0,0 +1,104 @@
+/****************************************************************************
+ * arch/mips/src/mips32/up_genexcptn.S
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <arch/mips32/registers.h>
+
+#include "chip/excptmacros.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+ 
+/****************************************************************************
+ * Global Symbols
+ ****************************************************************************/
+
+	.file	"up_genexcptn.S"
+	.global _int_handler
+	.global up_decodeirq
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+/****************************************************************************
+ * Name: _int_exception
+ *
+ * Description:
+ *   Interrupt Exception Vector Handler.  Jumps to _int_handler
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   Does not return
+ *
+ ****************************************************************************/
+
+	.section .int_excpt,"ax",@progbits
+	.set	noreorder
+	.ent	_int_exception
+_int_exception:
+	la		k0, _int_handler
+	jr		k0
+	nop
+	.end _int_exception
+
+/****************************************************************************
+ * Name: _int_handler
+ *
+ * Description:
+ *   Interrupt exception handler
+ *
+ ****************************************************************************/
+
+	.section .int_handler, "ax", @progbits
+	.set	noreorder
+	.ent	_int_handler
+_int_handler:
+	EXCPT_PROLOGUE t0			/* Save registers on stack, enable nested interrupts */
+	move	a0, sp				/* Pass register save structure as the parameter 1 */
+	USE_INTSTACK t0, t1, t2		/* Switch to the interrupt stack */
+	la		t0, up_decodeirq	/* Call up_decodeirq(regs) */
+	jalr	t0, ra
+	di							/* Disable interrupts */
+	RESTORE_STACK t0, t1		/* Undo the operations of USE_STACK */
+	EXCPT_EPILOGUE v0			/* Return to the context returned by up_decodeirq() */
+	.end	_int_handler

arch/mips/src/pic32mx/Make.defs

@@ -39,7 +39,7 @@ HEAD_ASRC = pic32mx-head.S
 
 # Common MIPS files
 
-CMN_ASRCS = up_syscall0.S
+CMN_ASRCS = up_syscall0.S up_inthandler.S up_bevhandler.S
 CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \
 			up_createstack.c up_doirq.c up_exit.c up_idle.c up_initialize.c \
 			up_initialstate.c up_interruptcontext.c up_irq.c up_lowputs.c \

arch/mips/src/pic32mx/excptmacros.h

@@ -1,5 +1,5 @@
 /********************************************************************************************
- * arch/mips/src/mips32/mips32-excptmacros.h
+ * arch/mips/src/pic32mx/excptmacros.h
  *
  *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -33,8 +33,8 @@
  *
  ********************************************************************************************/
 
-#ifndef __ARCH_MIPS_SRC_MIPS32_MIPS32_EXCPTMACROS_H
+#ifndef __ARCH_MIPS_SRC_PIC32MX_EXCPTMACROS_H
-#define __ARCH_MIPS_SRC_MIPS32_MIPS32_EXCPTMACROS_H
+#define __ARCH_MIPS_SRC_PIC32MX_EXCPTMACROS_H
 
 /********************************************************************************************
  * Included Files
@@ -43,7 +43,7 @@
 #include <nuttx/config.h>
 
 #include <arch/irq.h>
-#include <arch/mips32/cp0.h>
+#include <arch/pic32mx/cp0.h>
 
 #ifdef __ASSEMBLY__
 
@@ -70,7 +70,7 @@
  * my_exception:
  *		EXCPT_PROLOGUE t0			- Save registers on stack, enable nested interrupts
  *		move a0, sp					- Pass register save structure as the parameter 1
- *		USE_INTSTACK, t0, t1, t2	- Switch to the interrupt stack
+ *		USE_INTSTACK t0, t1, t2		- Switch to the interrupt stack
  *		jal	handler					- Handle the exception IN=old regs OUT=new regs
  *		di							- Disable interrupts
  *		RESTORE_STACK t0, t1		- Undo the operations of USE_STACK
@@ -100,7 +100,8 @@
  *
  ********************************************************************************************/
 
-	.macro		EXCPT_PROLOGUE, tmp
+	.macro	EXCPT_PROLOGUE, tmp
+	.set	noat
 
 	/* Get the SP from the previous shadow set */
 
@@ -243,7 +244,8 @@
  *
  ********************************************************************************************/
 
-	.macro	EXCPT_EXIT, regs
+	.macro	EXCPT_EPILOGUE, regs
+	.set	noat
 
 	/* Since interrupts are disabled via di can now use k0 and k1 again.  Use k1 as the
 	 * pointer to the register save array.
@@ -407,4 +409,4 @@
 	.endm
 
 #endif /* __ASSEMBLY__ */
-#endif /* __ARCH_MIPS_SRC_MIPS32_MIPS32_EXCPTMACROS_H */
+#endif /* __ARCH_MIPS_SRC_PIC32MX_EXCPTMACROS_H */

arch/mips/src/pic32mx/pic32mx-head.S

@@ -78,7 +78,9 @@
 	.global __start
 	.global halt
 
-	.global	__nmi_handler
+	.global	nmi_handler
+	.global	bev_handler
+	.global	int_handler
 	.global os_start
 
 /****************************************************************************
@@ -321,52 +323,6 @@ __start:
 	nop
 	.end __start
 
-/****************************************************************************
- * Name: _bev_exception
- *
- * Description:
- *   Boot Exception Vector Handler.  Jumps to _bootstrap_exception_handler
- *
- * Input Parameters:
- *   None
- *
- * Returned Value:
- *   Does not return
- *
- ****************************************************************************/
-
-	.section .bev_handler,"ax",@progbits
-	.set	noreorder
-	.ent	_bev_exception
-_bev_exception:
-	la		k0, _bootstrap_exception_handler
-	jr		k0
-	nop
-	.end _bev_exception
-			
-/****************************************************************************
- * Name: _bev_exception
- *
- * Description:
- *   General Exception Vector Handler.  Jumps to _general_exception_handler
- *
- * Input Parameters:
- *   None
- *
- * Returned Value:
- *   Does not return
- *
- ****************************************************************************/
-
-	.section .gen_handler,"ax",@progbits
-	.set	noreorder
-	.ent	_gen_exception
-_gen_exception:
-	la		k0, _general_exception_context
-	jr		k0
-	nop
-	.end _gen_exception
-
 /****************************************************************************
  * Name: __start_nuttx
  *

configs/pcblogic-pic32mx/ostest/ld.script

@@ -49,20 +49,32 @@ MEMORY
 	 *   REGION        PHYSICAL   KSEG   SIZE
 	 *   DESCRIPTION   START ADDR        (BYTES)
 	 *   ------------- ---------- ------ ---------------
-	 *   Reset         0x1fc00000 KSEG1  896
+	 *   Exceptions:*
-	 *   BEV exception 0x1fc00380 KSEG1  256
+	 *     Reset       0x1fc00000 KSEG1  512
-	 *   DBG exception 0x1fc00480 KSEG1  16
+	 *     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)
+		*(.bev_handler)
-	} > kseg0_exptmem
+		*(.int_handler)
+	} > kseg0_excptmem
 
 	.dbg_code = ORIGIN(kseg1_dbgcode);