From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 18:29:51 +0200
Subject: Adding upstream version 2.06.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 grub-core/mmap/i386/uppermem.c | 98 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 grub-core/mmap/i386/uppermem.c

(limited to 'grub-core/mmap/i386/uppermem.c')

diff --git a/grub-core/mmap/i386/uppermem.c b/grub-core/mmap/i386/uppermem.c
new file mode 100644
index 0000000..a6be989
--- /dev/null
+++ b/grub-core/mmap/i386/uppermem.c
@@ -0,0 +1,98 @@
+/* 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/i386/memory.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+
+/* Helper for grub_mmap_get_lower.  */
+static int
+lower_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
+	    void *data)
+{
+  grub_uint64_t *lower = data;
+
+  if (type != GRUB_MEMORY_AVAILABLE)
+    return 0;
+#ifdef GRUB_MACHINE_COREBOOT
+  if (addr <= 0x1000)
+#else
+  if (addr == 0)
+#endif
+    *lower = size + addr;
+  return 0;
+}
+
+grub_uint64_t
+grub_mmap_get_lower (void)
+{
+  grub_uint64_t lower = 0;
+
+  grub_mmap_iterate (lower_hook, &lower);
+  if (lower > 0x100000)
+    lower =  0x100000;
+  return lower;
+}
+
+/* Helper for grub_mmap_get_upper.  */
+static int
+upper_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
+	    void *data)
+{
+  grub_uint64_t *upper = data;
+
+  if (type != GRUB_MEMORY_AVAILABLE)
+    return 0;
+  if (addr <= 0x100000 && addr + size > 0x100000)
+    *upper = addr + size - 0x100000;
+  return 0;
+}
+
+grub_uint64_t
+grub_mmap_get_upper (void)
+{
+  grub_uint64_t upper = 0;
+
+  grub_mmap_iterate (upper_hook, &upper);
+  return upper;
+}
+
+/* Helper for grub_mmap_get_post64.  */
+static int
+post64_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
+	     void *data)
+{
+  grub_uint64_t *post64 = data;
+  if (type != GRUB_MEMORY_AVAILABLE)
+    return 0;
+  if (addr <= 0x4000000 && addr + size > 0x4000000)
+    *post64 = addr + size - 0x4000000;
+  return 0;
+}
+
+/* Count the continuous bytes after 64 MiB. */
+grub_uint64_t
+grub_mmap_get_post64 (void)
+{
+  grub_uint64_t post64 = 0;
+
+  grub_mmap_iterate (post64_hook, &post64);
+  return post64;
+}
-- 
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