haswell: Add initial support for Haswell platforms

The Haswell parts use a PCH code named Lynx Point (Series 8). Therefore,
the southbridge support is included as well. The basis for this code is
the Sandybridge code. Management Engine, IRQ routing, and ACPI still requires
more attention, but this is a good starting point.

This code partially gets up through the romstage just before training
memory on a Haswell reference board.

Change-Id: If572d6c21ca051b486b82a924ca0ffe05c4d0ad4
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2616
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/intel/haswell/finalize.c

@@ -0,0 +1,76 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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 <stdint.h>
+#include <stdlib.h>
+#include <cpu/cpu.h>
+#include <cpu/x86/msr.h>
+#include "haswell.h"
+
+#if 0
+static void msr_set_bit(unsigned reg, unsigned bit)
+{
+	msr_t msr = rdmsr(reg);
+
+	if (bit < 32) {
+		if (msr.lo & (1 << bit))
+			return;
+		msr.lo |= 1 << bit;
+	} else {
+		if (msr.hi & (1 << (bit - 32)))
+			return;
+		msr.hi |= 1 << (bit - 32);
+	}
+
+	wrmsr(reg, msr);
+}
+#endif
+
+void intel_cpu_haswell_finalize_smm(void)
+{
+#if 0
+	msr_set_bit(MSR_PMG_CST_CONFIG_CONTROL, 15);
+
+	/* Lock AES-NI only if supported */
+	if (cpuid_ecx(1) & (1 << 25))
+		msr_set_bit(MSR_FEATURE_CONFIG, 0);
+
+#ifdef LOCK_POWER_CONTROL_REGISTERS
+	/*
+	 * Lock the power control registers.
+	 *
+	 * These registers can be left unlocked if modifying power
+	 * limits from the OS is desirable. Modifying power limits
+	 * from the OS can be especially useful for experimentation
+	 * during  early phases of system bringup while the thermal
+	 * power envelope is being proven.
+	 */
+
+	msr_set_bit(MSR_PP0_CURRENT_CONFIG, 31);
+	msr_set_bit(MSR_PP1_CURRENT_CONFIG, 31);
+	msr_set_bit(MSR_PKG_POWER_LIMIT, 63);
+	msr_set_bit(MSR_PP0_POWER_LIMIT, 31);
+	msr_set_bit(MSR_PP1_POWER_LIMIT, 31);
+#endif
+
+	msr_set_bit(MSR_MISC_PWR_MGMT, 22);
+	msr_set_bit(MSR_LT_LOCK_MEMORY, 0);
+#endif
+}