ipq8064: add DRAM initialization code

Read two blobs from CBFS: cdt.mbn (memory configuration descriptor)
and ddr.mbn (actual memory initialization code).

Pointer to CDT which starts right above the MBN header is passed to
the memory initialization routine. Zero return value means memory
initialization succeeded.

BRANCH=storm
BUG=chrome-os-partner:34161
TEST=with upcoming patches memory initialization succeeds.

Change-Id: Ia0903dc4446c03f7f0dc3f4cc3a34e90a8064afc
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 1d79dadd7d47dd6d01e031bc77810c9e85dd854b
Original-Change-Id: Ib5a7e4fe0eb24a7bd090ec3553c57cd1b7e41512
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/234644
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9686
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/google/storm/romstage.c

@@ -20,10 +20,12 @@
 #include <cbmem.h>
 #include <console/console.h>
 #include <program_loading.h>
+#include <soc/soc_services.h>
 
 void main(void)
 {
 	console_init();
 	cbmem_initialize_empty();
+	initialize_dram();
 	run_ramstage();
 }

src/soc/qualcomm/ipq806x/Makefile.inc

@@ -33,6 +33,7 @@ verstage-y += timer.c
 verstage-$(CONFIG_CONSOLE_SERIAL_IPQ806X) += uart.c
 
 romstage-y += clock.c
+romstage-y += blobs_init.c
 romstage-y += gpio.c
 romstage-$(CONFIG_SPI_FLASH) += spi.c
 romstage-y += timer.c

src/soc/qualcomm/ipq806x/blobs_init.c

@@ -0,0 +1,78 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 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 <cbfs.h>
+#include <string.h>
+#include <arch/cache.h>
+
+#include <soc/soc_services.h>
+
+#include <console/console.h>
+
+#include "mbn_header.h"
+
+static struct mbn_header *map_ipq_blob(const char *file_name)
+{
+	struct cbfs_file *blob_file;
+	struct mbn_header *blob_mbn;
+
+	blob_file = cbfs_get_file(CBFS_DEFAULT_MEDIA, file_name);
+	if (!blob_file)
+		return NULL;
+
+	blob_mbn = (struct mbn_header *)((uintptr_t)blob_file +
+					 ntohl(blob_file->offset));
+
+	/* some sanity checks on the headers */
+	if ((blob_mbn->mbn_version != 3) ||
+	    (blob_mbn->mbn_total_size > ntohl(blob_file->len)))
+		return NULL;
+
+	return blob_mbn;
+}
+
+int initialize_dram(void)
+{
+	struct mbn_header *cdt_mbn;
+	struct mbn_header *ddr_mbn;
+	int (*ddr_init_function)(void *cdt_header);
+
+	cdt_mbn = map_ipq_blob("cdt.mbn");
+	ddr_mbn = map_ipq_blob("ddr.mbn");
+
+	if (!cdt_mbn || !ddr_mbn) {
+		printk(BIOS_ERR, "cdt.mbn: %p, ddr.mbn: %p\n",
+		       cdt_mbn, ddr_mbn);
+		die("could not find DDR initialization blobs\n");
+	}
+
+	/* Actual area where DDR init is going to be running */
+	ddr_init_function = (int (*)(void *))ddr_mbn->mbn_destination;
+
+	/* Copy core into the appropriate memory location. */
+	memcpy(ddr_init_function, ddr_mbn + 1, ddr_mbn->mbn_total_size);
+	cache_sync_instructions();
+
+	if (ddr_init_function(cdt_mbn + 1) < 0) /* Skip mbn header. */
+		die("Fail to Initialize DDR\n");
+
+	printk(BIOS_INFO, "DDR initialized\n");
+
+	return 0;
+}

src/soc/qualcomm/ipq806x/include/soc/soc_services.h

@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 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 __SOC_QUALCOMM_IPQ806X_INCLUDE_SOC_SOC_SERVICES_H__
+#define __SOC_QUALCOMM_IPQ806X_INCLUDE_SOC_SOC_SERVICES_H__
+
+/* Returns zero on success, nonzero on failure. */
+int initialize_dram(void);
+
+#endif

src/soc/qualcomm/ipq806x/mbn_header.h

@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 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 __SOC_QUALCOMM_IPQ806X_MBN_HEADER_H__
+#define __SOC_QUALCOMM_IPQ806X_MBN_HEADER_H__
+
+#include <types.h>
+
+/* Qualcomm firmware blob header gleaned from util/ipqheader/ipqheader.py */
+
+struct mbn_header {
+	u32	mbn_type;
+	u32	mbn_version;
+	u32	mbn_source;
+	u32	mbn_destination;
+	u32	mbn_total_size;
+	u32	mbn_padding[5];
+};
+
+#endif
+