5 files changed, 119 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc
index 1969a3526c..11ef5a39f2 100644
--- a/src/soc/intel/baytrail/Makefile.inc
+++ b/src/soc/intel/baytrail/Makefile.inc
@@ -31,6 +31,7 @@ smm-y += pmutil.c
 smm-y += smihandler.c
 ramstage-y += smm.c
 ramstage-y += southcluster.c
+ramstage-$(CONFIG_HAVE_REFCODE_BLOB) += refcode.c
 
 # Remove as ramstage gets fleshed out
 ramstage-y += placeholders.c
diff --git a/src/soc/intel/baytrail/baytrail/efi_wrapper.h b/src/soc/intel/baytrail/baytrail/efi_wrapper.h
new file mode 100644
index 0000000000..6682f95cfc
--- /dev/null
+++ b/src/soc/intel/baytrail/baytrail/efi_wrapper.h
@@ -0,0 +1,50 @@
+/*
+ * PEI EFI entry point
+ *
+ * Copyright 2013 Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 GOOGLE INC 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.
+ */
+
+#ifndef __EFI_WRAPPER_H__
+#define __EFI_WRAPPER_H__
+
+#define EFI_WRAPPER_VER 1
+
+/* Provide generic x86 calling conventions. */
+#define ABI_X86 __attribute((regparm(0)))
+
+/* Errors returned by the EFI wrapper. */
+enum efi_wrapper_error {
+	INVALID_VER = -1,
+};
+
+struct efi_wrapper_params {
+	/* Mainboard Inputs */
+	int version;
+
+	void ABI_X86 (*console_out)(unsigned char byte);
+} __attribute__((packed));
+
+typedef int ABI_X86 (*efi_wrapper_entry_t)(struct efi_wrapper_params *);
+#endif
diff --git a/src/soc/intel/baytrail/baytrail/ramstage.h b/src/soc/intel/baytrail/baytrail/ramstage.h
index 790b8c6a99..eaa8f6beae 100644
--- a/src/soc/intel/baytrail/baytrail/ramstage.h
+++ b/src/soc/intel/baytrail/baytrail/ramstage.h
@@ -27,6 +27,11 @@
 void baytrail_init_pre_device(void);
 void baytrail_init_cpus(device_t dev);
 void set_max_freq(void);
+#if CONFIG_HAVE_REFCODE_BLOB
+void baytrail_run_reference_code(void);
+#else
+static inline void baytrail_run_reference_code(void) {}
+#endif
 
 extern struct pci_operations soc_pci_ops;
 
diff --git a/src/soc/intel/baytrail/ramstage.c b/src/soc/intel/baytrail/ramstage.c
index 229e3679df..896ecfe8d5 100644
--- a/src/soc/intel/baytrail/ramstage.c
+++ b/src/soc/intel/baytrail/ramstage.c
@@ -113,6 +113,9 @@ void baytrail_init_pre_device(void)
 	/* Allow for SSE instructions to be executed. */
 	write_cr4(read_cr4() | CR4_OSFXSR | CR4_OSXMMEXCPT);
 
+	/* Run reference code. */
+	baytrail_run_reference_code();
+
 	/* Get GPIO initial states from mainboard */
 	config = mainboard_get_gpios();
 	setup_soc_gpios(config);
diff --git a/src/soc/intel/baytrail/refcode.c b/src/soc/intel/baytrail/refcode.c
new file mode 100644
index 0000000000..1d88ef7eb9
--- /dev/null
+++ b/src/soc/intel/baytrail/refcode.c
@@ -0,0 +1,60 @@
+/*
+ * 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
+ */
+
+#include <cbmem.h>
+#include <console/console.h>
+#include <rmodule.h>
+
+#include <baytrail/ramstage.h>
+#include <baytrail/efi_wrapper.h>
+
+static void ABI_X86 send_to_console(unsigned char b)
+{
+	console_tx_byte(b);
+}
+
+void baytrail_run_reference_code(void)
+{
+	int ret;
+	efi_wrapper_entry_t entry;
+	struct efi_wrapper_params wrp = {
+		.version = EFI_WRAPPER_VER,
+		.console_out = send_to_console,
+	};
+	struct rmod_stage_load refcode = {
+		.cbmem_id = CBMEM_ID_REFCODE,
+		.name = CONFIG_CBFS_PREFIX "/refcode",
+	};
+
+	if (rmodule_stage_load_from_cbfs(&refcode) || refcode.entry == NULL) {
+		printk(BIOS_DEBUG, "Error loading reference code.\n");
+		return;
+	}
+
+	entry = refcode.entry;
+
+	/* Call into reference code. */
+	ret = entry(&wrp);
+
+	if (ret != 0) {
+		printk(BIOS_DEBUG, "Reference code returned %d\n", ret);
+		return;
+	}
+}
+