Add M16C register dump logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1503 42af7a65-404d-4744-a932-0658087f49c3

5 files changed, 284 insertions, 19 deletions

diff --git a/nuttx/arch/sh/src/m16c/Make.defs b/nuttx/arch/sh/src/m16c/Make.defs
index ceba5fd76..60a91314f 100644
--- a/nuttx/arch/sh/src/m16c/Make.defs
+++ b/nuttx/arch/sh/src/m16c/Make.defs
@@ -44,8 +44,8 @@ CMN_CSRCS	= up_allocateheap.c up_assert.c up_blocktask.c \
 
 CHIP_ASRCS	= m16c_vectors.S
 #CHIP_CSRCS	= m16c_initialstate.c m16c_copystate.c m16c_lowputc.c m16c_irq.c \
-#		  m16c_timerisr.c m16c_serial.c
-CHIP_CSRCS	= m16c_initialstate.c m16c_copystate.c m16c_irq.c
+#		  m16c_timerisr.c m16c_serial.c m16c_dumpstate.c
+CHIP_CSRCS	= m16c_initialstate.c m16c_copystate.c m16c_irq.c m16c_dumpstate.c
 
 ifneq ($(CONFIG_DISABLE_SIGNALS),y)
 CHIP_CSRCS	+= m16c_schedulesigaction.c m16c_sigdeliver.c
diff --git a/nuttx/arch/sh/src/m16c/chip.h b/nuttx/arch/sh/src/m16c/chip.h
index bd2655db3..aafe4e590 100644
--- a/nuttx/arch/sh/src/m16c/chip.h
+++ b/nuttx/arch/sh/src/m16c/chip.h
@@ -245,4 +245,28 @@
 #define M16C_PUR2          0x003fe    /* Pull-up control 2 */
 #define M16C_PCR           0x003ff    /* Port control */
 
+/************************************************************************************
+ * Global Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+extern uint16 g_snbss;		/* Start of near .bss */
+extern uint16 g_enbss;		/* End+1 of near .bss */
+extern uint16 g_sndata;		/* Start of near .data */
+extern uint16 g_endata;		/* End+1 of near .data */
+extern uint32 g_enronly;	/* Start of relocated read-only data in FLASH */
+#ifdef CONFIG_M16C_HAVEFARRAM
+extern uint32 g_sfbss;		/* Start of far .bss */
+extern uint32 g_efbss;		/* End+1 of far .bss */
+extern uint32 g_sfdata;		/* Start of far .data */
+extern uint32 g_efdata;		/* End_1 of far .data */
+extern uint32 g_efronly;	/* Start of relocated read-only data in FLASH */
+#endif
+extern uint32 g_svarvect;	/* Start of variable vectors */
+extern uint32 g_heapbase;	/* Start of the heap */
+
+#endif /* __ASSEMBLY__ */
+
+
 #endif /* __ARCH_SH_SRC_M16C_CHIP_H */
diff --git a/nuttx/arch/sh/src/m16c/m16c_dumpstate.c b/nuttx/arch/sh/src/m16c/m16c_dumpstate.c
new file mode 100755
index 000000000..6d70d8cee
--- /dev/null
+++ b/nuttx/arch/sh/src/m16c/m16c_dumpstate.c
@@ -0,0 +1,241 @@
+/****************************************************************************
+ * arch/sh/src/m16c/m16c_assert.c
+ *
+ *   Copyright (C) 2009 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 <sys/types.h>
+#include <debug.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/arch.h>
+
+#include "up_arch.h"
+#include "up_internal.h"
+#include "os_internal.h"
+#include "chip.h"
+
+#ifdef CONFIG_ARCH_STACKDUMP
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Output debug info if stack dump is selected -- even if  debug is not
+ * selected.
+ */
+
+#ifdef CONFIG_ARCH_STACKDUMP
+# undef  lldbg
+# define lldbg lib_lowprintf
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: m16c_getsp
+ ****************************************************************************/
+
+static inline uint16 m16c_getsp(void)
+{
+  uint16 sp;
+
+  __asm__ __volatile__
+    (
+      "\tstc sp, %0\n\t"
+      : "=r" (sp)
+      :
+      : "memory"
+    );
+  return sp;
+}
+
+/****************************************************************************
+ * Name: m16c_stackdump
+ ****************************************************************************/
+
+static void m16c_stackdump(uint16 sp, uint16 stack_base)
+{
+  uint16 stack;
+
+  for (stack = sp & ~7; stack < stack_base; stack += 8)
+    {
+      ubyte *ptr = (ubyte*)stack;
+      lldbg("%04x: %02x %02x %02x %02x %02x %02x %02x %02x\n",
+             stack, ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5], ptr[6], ptr[7]);
+    }
+}
+
+/****************************************************************************
+ * Name: m16c_registerdump
+ ****************************************************************************/
+
+static inline void m16c_registerdump(void)
+{
+  ubyte *ptr = (ubyte*) current_regs;
+
+  /* Are user registers available from interrupt processing? */
+
+  if (ptr)
+    {
+      /* Yes.. dump the interrupt registers */
+
+      lldbg("PC: %02x%02x%02x FLG: %02x00%02x FB: %02x%02x SB: %02x%02x SP: %02x%02x\n",
+            ptr[REG_FLGPCHI] & 0xff, ptr[REG_PC], ptr[REG_PC+1],
+            ptr[REG_FLGPCHI] >> 8, ptr[REG_FLG],
+            ptr[REG_FB], ptr[REG_FB+1],
+            ptr[REG_SB], ptr[REG_SB+1],
+            ptr[REG_SP], ptr[REG_SP+1]);
+
+      lldbg("R0: %02x%02x R1: %02x%02x R2: %02x%02x A0: %02x%02x A1: %02x%02x\n",
+            ptr[REG_R0], ptr[REG_R0+1], ptr[REG_R1], ptr[REG_R1+1],
+            ptr[REG_R2], ptr[REG_R2+1], ptr[REG_R3], ptr[REG_R3+1],
+            ptr[REG_A0], ptr[REG_A0+1], ptr[REG_A1], ptr[REG_A1+1]);
+
+    }
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_dumpstate
+ ****************************************************************************/
+
+void up_dumpstate(void)
+{
+  _TCB *rtcb        = (_TCB*)g_readytorun.head;
+  uint16 sp         = m16c_getsp();
+  uint16 ustackbase;
+  uint16 ustacksize;
+#if CONFIG_ARCH_INTERRUPTSTACK > 3
+  uint16 istackbase;
+  uint16 istacksize;
+#endif
+
+  /* Get the limits on the user stack memory */
+
+  if (rtcb->pid == 0)
+    {
+      ustackbase = g_heapbase - 1;
+      ustacksize = CONFIG_IDLETHREAD_STACKSIZE;
+    }
+  else
+    {
+      ustackbase = (uint16)rtcb->adj_stack_ptr;
+      ustacksize = (uint16)rtcb->adj_stack_size;
+    }
+
+  /* Get the limits on the interrupt stack memory. The near RAM memory map is as follows:
+   * 
+   * 0x00400 - DATA		Size: Determined by linker
+   *           BSS		Size: Determined by linker
+   *           Interrupt stack	Size: CONFIG_ARCH_INTERRUPTSTACK
+   *           Idle stack		Size: CONFIG_IDLETHREAD_STACKSIZE
+   *           Heap		Size: Everything remaining
+   * 0x00bff - (end+1)
+   */
+
+#if CONFIG_ARCH_INTERRUPTSTACK > 3
+  istackbase = g_enbss;
+  istacksize = CONFIG_ARCH_INTERRUPTSTACK;
+
+  /* Show interrupt stack info */
+
+  lldbg("sp:     %04x\n", sp);
+  lldbg("IRQ stack:\n");
+  lldbg("  base: %04x\n", istackbase);
+  lldbg("  size: %04x\n", istacksize);
+
+  /* Does the current stack pointer lie within the interrupt
+   * stack?
+   */
+
+  if (sp <= istackbase && sp > istackbase - istacksize)
+    {
+      /* Yes.. dump the interrupt stack */
+
+      m16c_stackdump(sp, istackbase);
+
+      /* Extract the user stack pointer which should lie
+       * at the base of the interrupt stack.
+       */
+
+      sp = g_userstack;
+      lldbg("sp:     %04x\n", sp);
+    }
+
+  /* Show user stack info */
+
+  lldbg("User stack:\n");
+  lldbg("  base: %04x\n", ustackbase);
+  lldbg("  size: %04x\n", ustacksize);
+#else
+  lldbg("sp:         %04x\n", sp);
+  lldbg("stack base: %04x\n", ustackbase);
+  lldbg("stack size: %04x\n", ustacksize);
+#endif
+
+  /* Dump the user stack if the stack pointer lies within the allocated user
+   * stack memory.
+   */
+
+  if (sp > ustackbase || sp <= ustackbase - ustacksize)
+    {
+#if !defined(CONFIG_ARCH_INTERRUPTSTACK) || CONFIG_ARCH_INTERRUPTSTACK < 4
+      lldbg("ERROR: Stack pointer is not within allocated stack\n");
+#endif
+    }
+  else
+    {
+      m16c_stackdump(sp, ustackbase);
+    }
+
+  /* Then dump the registers (if available) */
+
+  m16c_registerdump();
+}
+
+#endif /* CONFIG_ARCH_STACKDUMP */
diff --git a/nuttx/arch/sh/src/m16c/m16c_schedulesigaction.c b/nuttx/arch/sh/src/m16c/m16c_schedulesigaction.c
index d33e63378..c62399b6f 100644
--- a/nuttx/arch/sh/src/m16c/m16c_schedulesigaction.c
+++ b/nuttx/arch/sh/src/m16c/m16c_schedulesigaction.c
@@ -146,18 +146,18 @@ void up_schedule_sigaction(_TCB *tcb, sig_deliver_t sigdeliver)
                * the signals have been delivered.
                */
 
-              tcb->xcp.sigdeliver      = sigdeliver;
-              tcb->xcp.saved_pc[0]     = current_regs[REG_PC16];
-              tcb->xcp.saved_pc[1]     = current_regs[REG_PC16+1];
-              tcb->xcp.saved_flg       = current_regs[REG_FLG];
+              tcb->xcp.sigdeliver    = sigdeliver;
+              tcb->xcp.saved_pc[0]   = current_regs[REG_PC];
+              tcb->xcp.saved_pc[1]   = current_regs[REG_PC+1];
+              tcb->xcp.saved_flg     = current_regs[REG_FLG];
 
               /* Then set up to vector to the trampoline with interrupts
                * disabled
                */
 
-              current_regs[REG_PC16]   = (uint32)up_sigdeliver >> 8;
-              current_regs[REG_PC16+1] = (uint32)up_sigdeliver;
-              current_regs[REG_FLG]   &= ~M16C_FLG_I;
+              current_regs[REG_PC]   = (uint32)up_sigdeliver >> 8;
+              current_regs[REG_PC+1] = (uint32)up_sigdeliver;
+              current_regs[REG_FLG] &= ~M16C_FLG_I;
 
               /* And make sure that the saved context in the TCB
                * is the same as the interrupt return context.
@@ -180,18 +180,18 @@ void up_schedule_sigaction(_TCB *tcb, sig_deliver_t sigdeliver)
            * the signals have been delivered.
            */
 
-          tcb->xcp.sigdeliver       = sigdeliver;
-          tcb->xcp.saved_pc[0]      = tcb->xcp.regs[REG_PC16];
-          tcb->xcp.saved_pc[1]      = tcb->xcp.regs[REG_PC16+1];
-          tcb->xcp.saved_flg        = tcb->xcp.regs[REG_FLG];
+          tcb->xcp.sigdeliver     = sigdeliver;
+          tcb->xcp.saved_pc[0]    = tcb->xcp.regs[REG_PC];
+          tcb->xcp.saved_pc[1]    = tcb->xcp.regs[REG_PC+1];
+          tcb->xcp.saved_flg      = tcb->xcp.regs[REG_FLG];
 
           /* Then set up to vector to the trampoline with interrupts
            * disabled
            */
 
-          tcb->xcp.regs[REG_PC16]   = (uint32)up_sigdeliver >> 8;
-          tcb->xcp.regs[REG_PC16+1] = (uint32)up_sigdeliver;
-          tcb->xcp.regs[REG_FLG]   &= ~M16C_FLG_I;
+          tcb->xcp.regs[REG_PC]   = (uint32)up_sigdeliver >> 8;
+          tcb->xcp.regs[REG_PC+1] = (uint32)up_sigdeliver;
+          tcb->xcp.regs[REG_FLG] &= ~M16C_FLG_I;
         }
 
       irqrestore(flags);
diff --git a/nuttx/arch/sh/src/m16c/m16c_sigdeliver.c b/nuttx/arch/sh/src/m16c/m16c_sigdeliver.c
index 7cea935e4..2d4cf2069 100644
--- a/nuttx/arch/sh/src/m16c/m16c_sigdeliver.c
+++ b/nuttx/arch/sh/src/m16c/m16c_sigdeliver.c
@@ -102,9 +102,9 @@ void up_sigdeliver(void)
   /* Save the real return state on the stack. */
 
   up_copystate(regs, rtcb->xcp.regs);
-  regs[REG_PC16]   = rtcb->xcp.saved_pc[0];
-  regs[REG_PC16+1] = rtcb->xcp.saved_pc[1];
-  regs[REG_FLG]    = rtcb->xcp.saved_flg;
+  regs[REG_PC]   = rtcb->xcp.saved_pc[0];
+  regs[REG_PC+1] = rtcb->xcp.saved_pc[1];
+  regs[REG_FLG]  = rtcb->xcp.saved_flg;
 
   /* Get a local copy of the sigdeliver function pointer.
    * we do this so that we can nullify the sigdeliver