sgi support

grub-core/mmap/mips/uppermem.c

@@ -0,0 +1,68 @@
+/* Compute amount of lower and upper memory till the first hole. */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  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/mm.h>
+#include <grub/misc.h>
+#include <grub/cpu/memory.h>
+
+grub_uint64_t
+grub_mmap_get_lower (void)
+{
+  grub_uint64_t lower = 0;
+
+  auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
+				  grub_memory_type_t);
+  int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
+			     grub_memory_type_t type)
+    {
+      if (type != GRUB_MEMORY_AVAILABLE)
+	return 0;
+      if (addr == 0)
+	lower = size;
+      return 0;
+    }
+
+  grub_mmap_iterate (hook);
+  if (lower > GRUB_ARCH_LOWMEMMAXSIZE)
+    lower = GRUB_ARCH_LOWMEMMAXSIZE;
+  return lower;
+}
+
+grub_uint64_t
+grub_mmap_get_upper (void)
+{
+  grub_uint64_t upper = 0;
+
+  auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
+				  grub_memory_type_t);
+  int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
+			     grub_memory_type_t type)
+    {
+      if (type != GRUB_MEMORY_AVAILABLE)
+	return 0;
+      if (addr <= GRUB_ARCH_HIGHMEMPSTART && addr + size
+	  > GRUB_ARCH_HIGHMEMPSTART)
+	upper = addr + size - GRUB_ARCH_HIGHMEMPSTART;
+      return 0;
+    }
+
+  grub_mmap_iterate (hook);
+  return upper;
+}