Added rtems specific page tracking methods for uma page allocation.

rtemsbsd/src/rtems-bsd-page.c

@@ -0,0 +1,116 @@
+/**
+ * @file
+ *
+ * @ingroup rtems_bsd_rtems
+ *
+ * @brief FreeBSD uma source used pages which where there was an
+ * assumption of page alignment.  Doing this alignment would waste
+ * more memory than we were willing to do.  Therefore, a set of
+ * rtems-bsd-page routines track the allocation of pages and the
+ * small sections of source in the uma source were modified to use
+ * these methods on an rtems system.
+ */
+
+/*
+ * COPYRIGHT (c) 2012. On-Line Applications Research Corporation (OAR).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <freebsd/machine/rtems-bsd-config.h>
+
+#include <freebsd/sys/types.h>
+#include <freebsd/sys/systm.h>
+#include <freebsd/sys/malloc.h>
+#include <rtems/chain.h>
+
+
+#define RTEMS_PAGE_COUNT  100
+
+typedef struct {
+  rtems_chain_node node;
+  void             *page;
+  void             *end;
+
+} rtems_page_t;
+
+// chain of pages that have been allocated
+static rtems_chain_control rtems_page_list =  RTEMS_CHAIN_INITIALIZER_EMPTY( rtems_page_list );
+
+void *
+rtems_page_alloc(int bytes)
+{
+  static void         *p;
+  static rtems_page_t *page;
+
+  bytes = round_page(bytes);
+  p     = (void *) malloc(bytes, M_TEMP, M_NOWAIT | M_ZERO);
+
+  page = (rtems_page_t *) malloc(sizeof(rtems_page_t), M_TEMP, M_NOWAIT | M_ZERO);
+  page->page = p;
+  page->end  = p + bytes;
+
+  rtems_chain_append( &rtems_page_list, page );
+
+  return p;
+}
+
+rtems_page_t *rtems_page_t_find( void *address )
+{
+  rtems_chain_node *the_node;
+  rtems_page_t     *the_page = NULL;
+
+  for (the_node = rtems_chain_first( &rtems_page_list );
+       !rtems_chain_is_tail(&rtems_page_list, the_node);
+       the_node = rtems_chain_next(the_node)) {
+    the_page = the_node;
+  
+    if ((address >= the_page->page) && 
+        (address <= the_page->end))
+      return the_page;
+  }
+  return NULL;
+}
+
+void *rtems_page_find( void *address )
+{
+  rtems_page_t *ptr;
+
+  ptr = rtems_page_t_find( address );
+  
+  if (ptr)
+    return ptr->page;
+
+  return ptr;
+}
+
+void rtems_page_free( void *address )
+{
+  rtems_page_t *ptr;
+
+  ptr = rtems_page_t_find( address );
+  KASSERT(ptr != NULL, ("Unable to locate page for freed element"));
+  
+  free( ptr->page, M_TEMP );
+  free( ptr, M_TEMP );
+}