1 files changed, 83 insertions, 0 deletions
diff --git a/grub-core/kern/ieee1275/mmap.c b/grub-core/kern/ieee1275/mmap.c
new file mode 100644
index 0000000..bf325ea
--- /dev/null
+++ b/grub-core/kern/ieee1275/mmap.c
@@ -0,0 +1,83 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2003,2004,2005,2007,2008 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/memory.h>
+#include <grub/ieee1275/ieee1275.h>
+#include <grub/types.h>
+
+grub_err_t
+grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
+{
+  grub_ieee1275_phandle_t root;
+  grub_ieee1275_phandle_t memory;
+  grub_uint32_t available[128];
+  grub_ssize_t available_size;
+  grub_uint32_t address_cells = 1;
+  grub_uint32_t size_cells = 1;
+  int i;
+
+  /* Determine the format of each entry in `available'.  */
+  grub_ieee1275_finddevice ("/", &root);
+  grub_ieee1275_get_integer_property (root, "#address-cells", &address_cells,
+				      sizeof address_cells, 0);
+  grub_ieee1275_get_integer_property (root, "#size-cells", &size_cells,
+				      sizeof size_cells, 0);
+
+  if (size_cells > address_cells)
+    address_cells = size_cells;
+
+  /* Load `/memory/available'.  */
+  if (grub_ieee1275_finddevice ("/memory", &memory))
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
+		       "couldn't find /memory node");
+  if (grub_ieee1275_get_integer_property (memory, "available", available,
+					  sizeof available, &available_size))
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
+		       "couldn't examine /memory/available property");
+  if (available_size < 0 || (grub_size_t) available_size > sizeof (available))
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
+                       "/memory response buffer exceeded");
+
+  if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_BROKEN_ADDRESS_CELLS))
+    {
+      address_cells = 1;
+      size_cells = 1;
+    }
+
+  /* Decode each entry and call `hook'.  */
+  i = 0;
+  available_size /= sizeof (grub_uint32_t);
+  while (i < available_size)
+    {
+      grub_uint64_t address;
+      grub_uint64_t size;
+
+      address = available[i++];
+      if (address_cells == 2)
+	address = (address << 32) | available[i++];
+
+      size = available[i++];
+      if (size_cells == 2)
+	size = (size << 32) | available[i++];
+
+      if (hook (address, size, GRUB_MEMORY_AVAILABLE, hook_data))
+	break;
+    }
+
+  return grub_errno;
+}