1 files changed, 49 insertions, 0 deletions
diff --git a/src/include/ramstage_cache.h b/src/include/ramstage_cache.h
new file mode 100644
index 0000000000..5b0597a828
--- /dev/null
+++ b/src/include/ramstage_cache.h
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * This program 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; version 2 of the License.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _RAMSTAGE_CACHE_
+#define _RAMSTAGE_CACHE_
+
+#if !defined(__PRE_RAM__)
+#error "ramstage_cache only used in romstage for loading ramstage."
+#endif
+
+/* This structure is saved along with the relocated ramstage program when
+ * CONFIG_RELOCATED_RAMSTAGE is employed.  For x86, it can used to protect
+ * the integrity of the ramstage program on S3 resume by saving a copy of
+ * the relocated ramstage in SMM space with the assumption that the SMM region
+ * cannot be altered from the OS. The magic value just serves as a quick sanity
+ * check. */
+
+#define RAMSTAGE_CACHE_MAGIC 0xf3c3a02a
+
+struct ramstage_cache {
+	uint32_t magic;
+	uint32_t entry_point;
+	uint32_t load_address;
+	uint32_t size;
+	char program[0];
+} __attribute__((packed));
+
+/* Chipset/Board function for obtaining cache location and size. */
+struct ramstage_cache *ramstage_cache_location(long *size);
+/* Chipset/Board function called when cache is invalid on resume. */
+void ramstage_cache_invalid(struct ramstage_cache *cache);
+
+#endif  /* _RAMSTAGE_CACHE_ */