Add support for a BOARDIOC_RESET boardctl() command. Enable configuration options to support BOARDIOC_RESET for ARMv6-M and ARMv7-M

arch/Kconfig

@@ -159,6 +159,10 @@ config ARCH_HAVE_POWEROFF
 	bool
 	default n
 
+config ARCH_HAVE_RESET
+	bool
+	default n
+
 config ARCH_USE_MMU
 	bool "Enable MMU"
 	default n

arch/arm/Kconfig

@@ -233,6 +233,7 @@ config ARCH_CORTEXM0
 	bool
 	default n
 	select ARCH_HAVE_IRQPRIO
+	select ARCH_HAVE_RESET
 
 config ARCH_CORTEXM3
 	bool
@@ -240,6 +241,7 @@ config ARCH_CORTEXM3
 	select ARCH_HAVE_IRQPRIO
 	select ARCH_HAVE_RAMVECTORS
 	select ARCH_HAVE_HIPRI_INTERRUPT
+	select ARCH_HAVE_RESET
 
 config ARCH_CORTEXM4
 	bool
@@ -247,6 +249,7 @@ config ARCH_CORTEXM4
 	select ARCH_HAVE_IRQPRIO
 	select ARCH_HAVE_RAMVECTORS
 	select ARCH_HAVE_HIPRI_INTERRUPT
+	select ARCH_HAVE_RESET
 
 config ARCH_CORTEXM7
 	bool

arch/arm/src/armv6-m/up_systemreset.c

@@ -42,19 +42,21 @@
 
 #include <stdint.h>
 
+#include <nuttx/board.h>
+
 #include "up_arch.h"
 #include "nvic.h"
 
 /****************************************************************************
- * Pre-processor Definitions
+ * Public functions
- ****************************************************************************/
-
- /****************************************************************************
- * Public Types
  ****************************************************************************/
 
 /****************************************************************************
- * Public functions
+ * Name: up_systemreset
+ *
+ * Description:
+ *   Internal, Cortex-M0 reset logic.
+ *
  ****************************************************************************/
 
 void up_systemreset(void)
@@ -76,3 +78,32 @@ void up_systemreset(void)
 
   for (;;);
 }
+
+
+/****************************************************************************
+ * Name: board_reset
+ *
+ * Description:
+ *   Reset board.  This function may or may not be supported by a
+ *   particular board architecture.
+ *
+ * Input Parameters:
+ *   status - Status information provided with the reset event.  This
+ *     meaning of this status information is board-specific.  If not used by
+ *     a board, the value zero may be provided in calls to board_reset.
+ *
+ * Returned Value:
+ *   If this function returns, then it was not possible to power-off the
+ *   board due to some constraints.  The return value int this case is a
+ *   board-specific reason for the failure to shutdown.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARDCTL_RESET
+int board_reset(int status)
+{
+  up_systemreset();
+  return 0;
+}
+#endif
+

arch/arm/src/armv7-m/up_systemreset.c

@@ -42,19 +42,21 @@
 
 #include <stdint.h>
 
+#include <nuttx/board.h>
+
 #include "up_arch.h"
 #include "nvic.h"
 
 /****************************************************************************
- * Pre-processor Definitions
+ * Public functions
- ****************************************************************************/
-
- /****************************************************************************
- * Public Types
  ****************************************************************************/
 
 /****************************************************************************
- * Public functions
+ * Name: up_systemreset
+ *
+ * Description:
+ *   Internal, Cortex-M0 reset logic.
+ *
  ****************************************************************************/
 
 void up_systemreset(void)
@@ -77,3 +79,31 @@ void up_systemreset(void)
 
   for (;;);
 }
+
+
+/****************************************************************************
+ * Name: board_reset
+ *
+ * Description:
+ *   Reset board.  This function may or may not be supported by a
+ *   particular board architecture.
+ *
+ * Input Parameters:
+ *   status - Status information provided with the reset event.  This
+ *     meaning of this status information is board-specific.  If not used by
+ *     a board, the value zero may be provided in calls to board_reset.
+ *
+ * Returned Value:
+ *   If this function returns, then it was not possible to power-off the
+ *   board due to some constraints.  The return value int this case is a
+ *   board-specific reason for the failure to shutdown.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARDCTL_RESET
+int board_reset(int status)
+{
+  up_systemreset();
+  return 0;
+}
+#endif

arch/sim/src/up_head.c

@@ -56,8 +56,8 @@
  * Private Data
  ****************************************************************************/
 
-static jmp_buf sim_abort;
+static jmp_buf g_simabort;
-static int retcode = EXIT_SUCCESS;
+static int g_exitcode = EXIT_SUCCESS;
 
 /****************************************************************************
  * Global Functions
@@ -83,7 +83,7 @@ int main(int argc, char **argv, char **envp)
 
   /* Then start NuttX */
 
-  if (setjmp(sim_abort) == 0)
+  if (setjmp(g_simabort) == 0)
     {
       os_start();
     }
@@ -91,7 +91,7 @@ int main(int argc, char **argv, char **envp)
   /* Restore the original terminal mode and return the exit code */
 
   simuart_teriminate();
-  return retcode;
+  return g_exitcode;
 }
 
 /****************************************************************************
@@ -117,8 +117,8 @@ void up_assert(const uint8_t *filename, int line)
 
   /* Exit the simulation */
 
-  retcode = EXIT_FAILURE;
+  g_exitcode = EXIT_FAILURE;
-  longjmp(sim_abort, 1);
+  longjmp(g_simabort, 1);
 }
 
 /****************************************************************************
@@ -143,8 +143,8 @@ int board_power_off(int status)
 {
   /* Save the return code and exit the simulation */
 
-  retcode = status;
+  g_exitcode = status;
-  longjmp(sim_abort, 1);
+  longjmp(g_simabort, 1);
 }
 #endif