libbsp: refactored sparc/shared/bspgetworkarea.c to sparc/shared/startup/bspgetworkarea.c

* refactored sparc/shared/bspgetworkarea.c to sparc/shared/startup/bspgetworkarea.c

c/src/lib/libbsp/sparc/shared/startup/bspgetworkarea.c

@@ -0,0 +1,67 @@
+/*
+ *  This set of routines are the BSP specific initialization
+ *  support routines.
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ */
+
+/* #define BSP_GET_WORK_AREA_DEBUG */
+#include <bsp.h>
+#include <bsp/bootcard.h>
+#ifdef BSP_GET_WORK_AREA_DEBUG
+  #include <rtems/bspIo.h>
+#endif
+
+/* Tells us where to put the workspace in case remote debugger is present.  */
+extern uint32_t rdb_start;
+
+/* Must be aligned to 8, _end is aligned to 8 */
+unsigned int early_mem = (unsigned int)&end;
+
+/*
+ *  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_work_area_initialize(void)
+{
+  /* must be identical to STACK_SIZE in start.S */
+  #define STACK_SIZE (16 * 1024)
+
+  /* Early dynamic memory allocator is placed just above _end  */
+  void *work_area_start = (void *)early_mem;
+  uintptr_t work_area_size  =
+    (uintptr_t)rdb_start - (uintptr_t)early_mem - STACK_SIZE;
+  early_mem        = ~0; /* Signal bsp_early_malloc not to be used anymore */
+
+  /*
+   *  The following may be helpful in debugging what goes wrong when
+   *  you are allocating the Work Area in a new BSP.
+   */
+  #ifdef BSP_GET_WORK_AREA_DEBUG
+    {
+      void *sp = __builtin_frame_address(0);
+      void *end = *work_area_start + *work_area_size;
+      printk(
+        "work_area_start = 0x%p\n"
+        "work_area_size = %d 0x%08x\n"
+        "end = 0x%p\n"
+        "current stack pointer = 0x%p%s\n",
+        work_area_start,
+        work_area_size,  /* decimal */
+        work_area_size,  /* hexadecimal */
+        end,
+        sp,
+        ((sp >= *work_area_start && sp <= end) ? " OVERLAPS!" : "")
+     );
+     printk( "rdb_start = 0x%08x\n", rdb_start );
+   }
+ #endif
+
+  bsp_work_area_initialize_default(work_area_start, work_area_size);
+}