1 files changed, 108 insertions, 0 deletions
diff --git a/grub-core/kern/i386/coreboot/mmap.c b/grub-core/kern/i386/coreboot/mmap.c
new file mode 100644
index 0000000..8b0b202
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/mmap.c
@@ -0,0 +1,108 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 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/machine/memory.h>
+#include <grub/machine/lbio.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+
+static grub_err_t
+grub_linuxbios_table_iterate (int (*hook) (grub_linuxbios_table_item_t))
+{
+  grub_linuxbios_table_header_t table_header;
+  grub_linuxbios_table_item_t table_item;
+
+  auto int check_signature (grub_linuxbios_table_header_t);
+  int check_signature (grub_linuxbios_table_header_t tbl_header)
+  {
+    if (! grub_memcmp (tbl_header->signature, "LBIO", 4))
+      return 1;
+
+    return 0;
+  }
+
+  /* Assuming table_header is aligned to its size (8 bytes).  */
+
+  for (table_header = (grub_linuxbios_table_header_t) 0x500;
+       table_header < (grub_linuxbios_table_header_t) 0x1000; table_header++)
+    if (check_signature (table_header))
+      goto signature_found;
+
+  for (table_header = (grub_linuxbios_table_header_t) 0xf0000;
+       table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++)
+    if (check_signature (table_header))
+      goto signature_found;
+
+  grub_fatal ("Could not find coreboot table\n");
+
+signature_found:
+
+  table_item =
+    (grub_linuxbios_table_item_t) ((long) table_header +
+			       (long) table_header->size);
+  for (; table_item->size;
+       table_item = (grub_linuxbios_table_item_t) ((long) table_item + (long) table_item->size))
+    {
+      if (table_item->tag == GRUB_LINUXBIOS_MEMBER_LINK
+         && check_signature ((grub_linuxbios_table_header_t) (grub_addr_t)
+                             *(grub_uint64_t *) (table_item + 1)))
+       {
+         table_header = (grub_linuxbios_table_header_t) (grub_addr_t)
+           *(grub_uint64_t *) (table_item + 1);
+         goto signature_found;   
+       }
+      if (hook (table_item))
+       return 1;
+    }
+
+  return 0;
+}
+
+grub_err_t
+grub_machine_mmap_iterate (grub_memory_hook_t hook)
+{
+  mem_region_t mem_region;
+
+  auto int iterate_linuxbios_table (grub_linuxbios_table_item_t);
+  int iterate_linuxbios_table (grub_linuxbios_table_item_t table_item)
+  {
+    if (table_item->tag != GRUB_LINUXBIOS_MEMBER_MEMORY)
+      return 0;
+
+    mem_region =
+      (mem_region_t) ((long) table_item +
+				 sizeof (struct grub_linuxbios_table_item));
+    while ((long) mem_region < (long) table_item + (long) table_item->size)
+      {
+	if (hook (mem_region->addr, mem_region->size,
+		  /* Multiboot mmaps match with the coreboot mmap definition.
+		     Therefore, we can just pass type through.  */
+		  mem_region->type))
+	  return 1;
+
+	mem_region++;
+      }
+
+    return 0;
+  }
+
+  grub_linuxbios_table_iterate (iterate_linuxbios_table);
+
+  return 0;
+}