2008-05-15 Joel Sherrill <joel.sherrill@OARcorp.com>

	* Makefile.am, configure.ac, startup/bspstart.c: Add capability for
	bootcard.c BSP Initialization Framework to ask the BSP where it has
	memory for the RTEMS Workspace and C Program Heap. These collectively
	are referred to as work area. If the BSP supports this, then it does
	not have to include code to split the available memory between the
	two areas. This reduces the amount of code in the BSP specific
	bspstart.c file. Additionally, the shared framework can initialize
	the C Library, call rtems_debug_enable(), and dirty the work area
	memory. Until most/all BSPs support this new capability, if the BSP
	supports this, it should call
	RTEMS_BSP_BOOTCARD_HANDLES_RAM_ALLOCATION from its configure.ac. When
	the transition is complete, this autoconf macro can be removed.

1 files changed, 29 insertions, 39 deletions

diff --git a/c/src/lib/libbsp/sparc/leon3/startup/bspstart.c b/c/src/lib/libbsp/sparc/leon3/startup/bspstart.c
index 92ec5affc4..c411c9b3c7 100644
--- a/c/src/lib/libbsp/sparc/leon3/startup/bspstart.c
+++ b/c/src/lib/libbsp/sparc/leon3/startup/bspstart.c
@@ -36,9 +36,6 @@ extern uint32_t rdb_start;
  */ 
 int CPU_SPARC_HAS_SNOOPING;
 
-void bsp_libc_init( void *, uint32_t, int );
-extern void bsp_spurious_initialize();
-
 /*
  * set_snooping
  * 
@@ -50,62 +47,55 @@ extern void bsp_spurious_initialize();
 
 static inline int set_snooping(void) 
 {
-        int tmp;        
-        asm(" lda [%1] 2, %0 "
-            : "=r"(tmp)
-            : "r"(0xC)
-        );
-        return (tmp >> 27) & 1;
+  int tmp;        
+  asm(" lda [%1] 2, %0 "
+      : "=r"(tmp)
+      : "r"(0xC)
+  );
+  return (tmp >> 27) & 1;
 }
 
 /*
  *  bsp_pretasking_hook
  *
  *  BSP pretasking hook.  Called just before drivers are initialized.
- *  Used to setup libc and install any BSP extensions.
+ *  Used to setup libc and install any BSP extensions     .
  */
 
 void bsp_pretasking_hook(void)
 {
-  extern int end;
-  uint32_t heap_start;
-  uint32_t heap_size;
-
-  heap_start = (uint32_t) &end;
-  if (heap_start & (CPU_ALIGNMENT-1))
-    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
-
-  heap_size = Configuration.work_space_start - (void *)&end - STACK_SIZE;
-  heap_size &= 0xfffffff0;  /* keep it as a multiple of 16 bytes */
-
-  bsp_libc_init((void *) heap_start, heap_size, 0);
-
-#ifdef RTEMS_DEBUG
-  rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
-#endif
+  extern void bsp_spurious_initialize();
 
   bsp_spurious_initialize();
 }
 
 /*
+ *  This method returns the base address and size of the area which
+ *  is to be allocated between the RTEMS Workspace and the C Program
+ *  Heap.
+ */
+void bsp_get_workarea(
+  void   **workarea_base,
+  size_t  *workarea_size,
+  size_t  *requested_heap_size
+)
+{
+  /* Tells us where to put the workspace in case remote debugger is present.  */
+  extern uint32_t rdb_start;
+  /* must be identical to STACK_SIZE in start.S */
+  #define STACK_SIZE (16 * 1024)
+
+  *workarea_base       = &end;
+  *workarea_size       = (void *)rdb_start - (void *)&end - STACK_SIZE;
+  *requested_heap_size = 0;
+}
+
+/*
  *  bsp_start
  *
  *  This routine does the bulk of the system initialization.
  */
-
 void bsp_start( void )
 {
-  unsigned char *work_space_start;
-
-  work_space_start =
-    (unsigned char *)rdb_start - rtems_configuration_get_work_space_size();
-
-  if ( work_space_start <= (unsigned char *)&end ) {
-    printk( "bspstart: Not enough RAM!!!\n" );
-    BSP_fatal_return();
-  }
-
-  Configuration.work_space_start = work_space_start;
-  
   CPU_SPARC_HAS_SNOOPING = set_snooping();
 }