Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 92 insertions, 0 deletions

diff --git a/grub-core/loader/i386/bsd_pagetable.c b/grub-core/loader/i386/bsd_pagetable.c
new file mode 100644
index 0000000..9ec5abf
--- /dev/null
+++ b/grub-core/loader/i386/bsd_pagetable.c
@@ -0,0 +1,92 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (c) 1998  Michael Smith <msmith@freebsd.org>
+ *  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/>.
+ */
+
+/* Based on the code from FreeBSD originally distributed under the
+   following terms: */
+
+/*-
+ * Copyright (c) 1998  Michael Smith <msmith@freebsd.org>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+
+static void
+fill_bsd64_pagetable (grub_uint8_t *src, grub_addr_t target)
+{
+  grub_uint64_t *pt2, *pt3, *pt4;
+  grub_addr_t pt2t, pt3t;
+  int i;
+
+#define PG_V		0x001
+#define PG_RW		0x002
+#define PG_U		0x004
+#define PG_PS		0x080
+
+  pt4 = (grub_uint64_t *) src;
+  pt3 = (grub_uint64_t *) (src + 4096);
+  pt2 = (grub_uint64_t *) (src + 8192);
+
+  pt3t = target + 4096;
+  pt2t = target + 8192;
+
+  grub_memset (src, 0, 4096 * 3);
+
+  /*
+   * This is kinda brutal, but every single 1GB VM memory segment points to
+   * the same first 1GB of physical memory.  But it is how BSD expects
+   * it to be.
+   */
+  for (i = 0; i < 512; i++)
+    {
+      /* Each slot of the level 4 pages points to the same level 3 page */
+      pt4[i] = (grub_addr_t) pt3t;
+      pt4[i] |= PG_V | PG_RW | PG_U;
+
+      /* Each slot of the level 3 pages points to the same level 2 page */
+      pt3[i] = (grub_addr_t) pt2t;
+      pt3[i] |= PG_V | PG_RW | PG_U;
+
+      /* The level 2 page slots are mapped with 2MB pages for 1GB. */
+      pt2[i] = i * (2 * 1024 * 1024);
+      pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
+    }
+}