baytrail: fix uninitialized acpi structures

The callers of the following functions assume the storage
area provided by the pointers is initialized. That's not the
case as these were just place holders.
- void acpi_create_intel_hpet(acpi_hpet_t * hpet);
- void acpi_create_serialio_ssdt(acpi_header_t *ssdt);

To fix this properly initialize the hpet entry, and just remove
the serialio_ssdt function entirely.

BUG=chrome-os-partner:23505
BRANCH=None
TEST=Built and booted through depthcharge on rambi. Noted no more
     ACPI errors relating to invalid length.

Change-Id: If56ab033562ef2d755e9c9de42f507c95d291aba
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174716
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/4917
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/mainboard/google/rambi/acpi_tables.c

@@ -274,13 +274,6 @@ unsigned long write_acpi_tables(unsigned long start)
 	acpi_add_table(rsdp, ssdt);
 	ALIGN_CURRENT;
 
-	printk(BIOS_DEBUG, "ACPI:     * SSDT2\n");
-	ssdt = (acpi_header_t *)current;
-	acpi_create_serialio_ssdt(ssdt);
-	current += ssdt->length;
-	acpi_add_table(rsdp, ssdt);
-	ALIGN_CURRENT;
-
 	printk(BIOS_DEBUG, "current = %lx\n", current);
 	printk(BIOS_INFO, "ACPI: done.\n");
 	return current;

src/soc/intel/baytrail/Makefile.inc

@@ -34,6 +34,7 @@ ramstage-y += smm.c
 ramstage-y += southcluster.c
 ramstage-$(CONFIG_HAVE_REFCODE_BLOB) += refcode.c
 ramstage-y += sata.c
+ramstage-y += acpi.c
 
 # Remove as ramstage gets fleshed out
 ramstage-y += placeholders.c

src/soc/intel/baytrail/acpi.c

@@ -0,0 +1,58 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * 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 <arch/acpi.h>
+#include <arch/acpigen.h>
+#include <types.h>
+#include <string.h>
+
+#include <baytrail/acpi.h>
+#include <baytrail/iomap.h>
+
+void acpi_create_intel_hpet(acpi_hpet_t * hpet)
+{
+	acpi_header_t *header = &(hpet->header);
+	acpi_addr_t *addr = &(hpet->addr);
+
+	memset((void *) hpet, 0, sizeof(acpi_hpet_t));
+
+	/* fill out header fields */
+	memcpy(header->signature, "HPET", 4);
+	memcpy(header->oem_id, OEM_ID, 6);
+	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+	memcpy(header->asl_compiler_id, ASLC, 4);
+
+	header->length = sizeof(acpi_hpet_t);
+	header->revision = 1;
+
+	/* fill out HPET address */
+	addr->space_id = 0;	/* Memory */
+	addr->bit_width = 64;
+	addr->bit_offset = 0;
+	addr->addrl = (unsigned long long)HPET_BASE_ADDRESS & 0xffffffff;
+	addr->addrh = (unsigned long long)HPET_BASE_ADDRESS >> 32;
+
+	hpet->id = 0x8086a201;	/* Intel */
+	hpet->number = 0x00;
+	hpet->min_tick = 0x0080;
+
+	header->checksum =
+	    acpi_checksum((void *) hpet, sizeof(acpi_hpet_t));
+}

src/soc/intel/baytrail/baytrail/acpi.h

@@ -23,7 +23,6 @@
 #include <arch/acpi.h>
 
 void acpi_create_intel_hpet(acpi_hpet_t * hpet);
-void acpi_create_serialio_ssdt(acpi_header_t *ssdt);
 
 #endif /* _BAYTRAIL_ACPI_H_ */
 

src/soc/intel/baytrail/baytrail/iomap.h

@@ -30,6 +30,7 @@
 #define MPHY_BASE_ADDRESS		0xfef00000
 #define PUNIT_BASE_ADDRESS		0xfed05000
 #define RCBA_BASE_ADDRESS		0xfed1c000
+#define HPET_BASE_ADDRESS		0xfed00000
 
 /* IO Port base */
 #define ACPI_BASE_ADDRESS		0x0400

src/soc/intel/baytrail/placeholders.c

@@ -7,10 +7,6 @@
 
 void generate_cpu_entries(void) {}
 
-void acpi_create_intel_hpet(acpi_hpet_t * hpet) {}
-
-void acpi_create_serialio_ssdt(acpi_header_t *ssdt) {}
-
 unsigned long acpi_fill_mcfg(unsigned long current) { return current; }
 
 void smm_init(void) {}