pc386: Add BSP_ENABLE_IDE BSP option

This allows the IDE support to be completely disabled. It is needed to
prevent hangs on some hardware. In particular, the Intel Edison where
it is not present.

c/src/lib/libbsp/i386/pc386/Makefile.am

@@ -164,8 +164,11 @@ libbsp_a_SOURCES += ../../shared/src/irq-server.c
 # timer
 libbsp_a_SOURCES += timer/timer.c timer/timerisr.S
 
+if HAS_IDE
 # ide
-libbsp_a_SOURCES += ide/idecfg.c ide/ide.c
+libbsp_a_SOURCES += ide/ide.c
+libbsp_a_SOURCES += ide/idecfg.c
+endif
 
 if HAS_SMP
 libbsp_a_SOURCES += ../../i386/shared/smp/getcpuid.c 

c/src/lib/libbsp/i386/pc386/configure.ac

@@ -22,6 +22,11 @@ RTEMS_BSPOPTS_HELP([BSP_ENABLE_VGA],
 [Set if the VGA and keyboard console support is enabled.])
 AM_CONDITIONAL(RTEMS_VGA,[test "$BSP_ENABLE_VGA" = "1"])
 
+RTEMS_BSPOPTS_SET([BSP_ENABLE_IDE],[*],[1])
+RTEMS_BSPOPTS_HELP([BSP_ENABLE_IDE],
+[Set if IDE support is enabled.])
+AM_CONDITIONAL(HAS_IDE,[test "$BSP_ENABLE_IDE" = "1"])
+
 RTEMS_BSPOPTS_SET([USE_COM1_AS_CONSOLE],[*],[0])
 RTEMS_BSPOPTS_HELP([USE_COM1_AS_CONSOLE],
 [Determines, whether the console will be associated with the standard

c/src/lib/libbsp/i386/pc386/include/bsp.h

@@ -218,6 +218,7 @@ void register_leds(                           /* from 'keyboard.c' */
 const char* bsp_cmdline(void);
 const char* bsp_cmdline_arg(const char* arg);
 
+#if BSP_ENABLE_IDE
 /*
  * IDE command line parsing.
  */
@@ -227,6 +228,7 @@ void bsp_ide_cmdline_init(void);
  * indicate, that BSP has IDE driver
  */
 #define RTEMS_BSP_HAS_IDE_DRIVER
+#endif
 
 /* GDB stub stuff */
 void init_remote_gdb( void );

c/src/lib/libbsp/i386/pc386/startup/bspstart.c

@@ -79,7 +79,9 @@ static void bsp_start_default( void )
 
   Clock_driver_install_handler();
 
+#if BSP_ENABLE_IDE
   bsp_ide_cmdline_init();
+#endif
 
 } /* bsp_start_default */