PR 1962/bsps - MVME162 Console Corrections and Improvements

* console/console.c: char_ready() was never returning true so console
	never processed input data
	* console/console.c: added printk() support to default device
	* include/bsp.h: Added #define for MOT_162BUG_VEC_ADDRESS
	* startup/bspclean.c: Modified to use MOT_162BUG_VEC_ADDRESS
	* startup/bspstart.c: Modified to use MOT_162BUG_VEC_ADDRESS
	* make/custom/mvme162.cfg: Modified to use "RTEMS_CPU_MODEL=68lc040"
	and "CPU_CFLAGS = -mcpu=68040 -msoft-float" so BSP will always
	work with all board variations.
	* README: Added notes on user required configuration changes and
	information about board models and variants
	* README.models: New file that contains a detailed list of MVME162
	models and variants.

Signed-off-by: Vic Hoover <victor.hoover.ctr@navy.mil>

c/src/lib/libbsp/m68k/mvme162/README

@@ -11,14 +11,40 @@
 --  $Id$
 --
 
+
 MVME162 Models
 --------------
 
-MVME162 model uses 68040.
+There are three different models of the MVME162 board.  There are many
+variations within each model.
+
+  Model        Variants
+  ---------    --------------------------------------------------
+  MVME162      MVME162-0xx
+  MVME162FX    MVME162-4xx, MVME162-5xx
+  MVME162LX    MVME162-2xx, MVME162-3xx, MVME162-7xx, MVME162-8xx
+
+All models use either an MC68040 or MC68LC040 (no FPU) processors.  The
+processor used varies by variant as does the speed, the amount and type
+of memory and the I/O devices (serial, ethernet, SCSI and VME).  See the
+README.models file for details.
+
+
+Configuring the BSP
+-------------------
+The BSP needs to be configured for your specific board.  The following
+files need to be modified.
+
+include/bsp.h
+Change the MOT_162BUG_VEC_ADDRESS define to start of memory for your
+board
+
+make/custom/mvme162.cfg
+If your board has an MC68040 processor
+- change the value of RTEMS_CPU_MODEL
+- remove the -msoft-float flag from CPU_CFLAGS
 
-MVME162FX model uses XXX.
 
-MVME162LX model uses 68LC040.
 
 MVME162FX and DMA on the IP bus
 -------------------------------

c/src/lib/libbsp/m68k/mvme162/console/console.c

@@ -26,6 +26,14 @@
 
 Ring_buffer_t  Console_Buffer[2];
 
+static bool    Console_Is_Initialized = false;
+
+/* Printk function */
+static void _162Bug_output_char( char c );
+static void _BSP_output_char( char c );
+BSP_output_char_function_type BSP_output_char = _BSP_output_char;
+
+
 /*
  *  Interrupt handler for receiver interrupts
  */
@@ -49,6 +57,44 @@ rtems_isr C_Receive_ISR(rtems_vector_number vector)
   }
 }
 
+
+/*
+ *  _162Bug_output_char
+ *
+ *  Output a single character using the 162Bug functions.  The character
+ *  will be written to the default output port.
+ */
+
+void _162Bug_output_char( char c )
+{
+  asm volatile( "moveb  %0, -(%%sp)\n\t"   /* char to output */
+                "trap   #15\n\t"           /* Trap to 162Bug */
+                ".short 0x20"              /* Code for .OUTCHR */
+    :: "d" (c) );
+}
+
+
+/*
+ *  _BSP_output_char
+ *
+ *  printk() function prototyped in bspIo.h. Does not use termios.
+ *
+ *  If we have initialized the console device then use it, otherwise
+ *  use the 162Bug routines to send it to the default output port.
+ */
+
+void _BSP_output_char(char c)
+{
+  if (Console_Is_Initialized)
+    putchar(c);
+  else
+    _162Bug_output_char(c);
+
+  if ('\n' == c)
+    _BSP_output_char('\r');
+}
+
+
 rtems_device_driver console_initialize(
   rtems_device_major_number  major,
   rtems_device_minor_number  minor,
@@ -117,7 +163,7 @@ bool char_ready(int port, char *ch)
 
   Ring_buffer_Remove_character( &Console_Buffer[port], *ch );
 
-  return false;
+  return true;
 }
 
 /*

c/src/lib/libbsp/m68k/mvme162/include/bsp.h

@@ -163,6 +163,28 @@ typedef volatile struct {
 #define EXTERN extern
 #endif
 
+
+/*
+ *  This value is the default address location of the 162Bug vector table
+ *  and is also the default start address of the boards DRAM.  This value
+ *  may be different for your specific board based on a number of factors:
+ *
+ *     Default DRAM address:   0x00000000
+ *     Default SRAM address:   0xFFE00000
+ *
+ *  o  If no DRAM can be found by the 162Bug program, it will use SRAM.
+ *  o  The default SRAM address may be different if SRAM mezzanine boards
+ *     are installed on the main board.
+ *  o  Both the DRAM and SRAM addresses can be modified by changing the
+ *     appropriate values in NVRAM using the ENV command at the 162Bug
+ *     prompt.
+ *
+ *  If your board has different values than the defaults, change the value
+ *  of the following define.
+ *
+ */
+#define MOT_162BUG_VEC_ADDRESS  0x00000000
+
 extern m68k_isr_entry M68Kvec[];   /* vector table address */
 
 /* functions */

c/src/lib/libbsp/m68k/mvme162/make/custom/mvme162.cfg

@@ -9,13 +9,13 @@ include $(RTEMS_ROOT)/make/custom/default.cfg
 RTEMS_CPU=m68k
 
 RTEMS_MVME162_MODEL=mvme162
-RTEMS_CPU_MODEL=m68040
+RTEMS_CPU_MODEL=m68lc040
 
 #  This contains the compiler options necessary to select the CPU model
 #  and (hopefully) optimize for it. 
 #
 
-CPU_CFLAGS = -mcpu=68040
+CPU_CFLAGS = -mcpu=68040 -msoft-float
 
 # optimize flag: typically -O2
 CFLAGS_OPTIMIZE_V = -O2 -g -fomit-frame-pointer

c/src/lib/libbsp/m68k/mvme162/startup/bspclean.c

@@ -30,11 +30,7 @@ void bsp_return_to_monitor_trap(void)
   page_table_teardown();
 
   lcsr->intr_ena = 0;                    /* disable interrupts */
-#if defined(mvme162lx)
+  m68k_set_vbr(MOT_162BUG_VEC_ADDRESS);  /* restore 162Bug vectors */
-  m68k_set_vbr(0x00000000);         /* restore 162Bug vectors */
-#else
-  m68k_set_vbr(0xFFE00000);         /* restore 162Bug vectors */
-#endif
 
   __asm__ volatile( "trap   #15"  );    /* trap to 162Bug */
   __asm__ volatile( ".short 0x63" );    /* return to 162Bug (.RETURN) */

c/src/lib/libbsp/m68k/mvme162/startup/bspstart.c

@@ -34,17 +34,7 @@ void bsp_start( void )
   m68k_isr_entry       *monitors_vector_table;
   int                   index;
 
-  /*
+  monitors_vector_table = (m68k_isr_entry *)MOT_162BUG_VEC_ADDRESS;
-   *  162Bug Vectors are at 0xFFE00000
-   *  162Bug Vectors on LX are at 0x00000000
-   */
-
-#if defined(mvme162lx)
-  monitors_vector_table = (m68k_isr_entry *)0x00000000;
-#else
-  monitors_vector_table = (m68k_isr_entry *)0xFFE00000;
-#endif
-
   m68k_set_vbr( monitors_vector_table );
 
   for ( index=2 ; index<=255 ; index++ )