amd/stoneyridge: Convert MP init to mp_init_with_smm

Change the Stoney Ridge SOC to a more modern method for setting up
the multiple cores.

Add a new cpu.c file for most of the processor initiliazation.  Build
mp_ops with the necessary callbacks.  Note also that this patch removes
cpu_bus_scan.  Rather than manually find CPUs and add them to the
devicetree, allow this to be done automatically in the generic
mp_init.c file.

SMM information is left blank in mp_ops to avoid having mp_init.c
install a handler at this time.  A later patch will add TSEG SMM
capabilities for the APU.

This patch also contains a hack to mask the behavior of AGESA which
configures the MTRRs and Tom2ForceMemTypeWB coming out of AmdInitPost.
The hack immediately changes all WB variable MTRRs, on the BSP, to UC
so that all writes to memory space will make it to the DRAM.

BUG=b:66200075

Change-Id: Ie54295cb00c6835947456e8818a289b7eb260914
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/21498
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

2 files changed, 26 insertions, 1 deletions

diff --git a/src/soc/amd/stoneyridge/include/soc/cpu.h b/src/soc/amd/stoneyridge/include/soc/cpu.h
new file mode 100644
index 0000000000..d2c412f4ef
--- /dev/null
+++ b/src/soc/amd/stoneyridge/include/soc/cpu.h
@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, 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.
+ */
+
+#ifndef __STONEYRIDGE_CPU_H__
+#define __STONEYRIDGE_CPU_H__
+
+void stoney_init_cpus(struct device *dev);
+
+#endif /* __STONEYRIDGE_CPU_H__ */
diff --git a/src/soc/amd/stoneyridge/include/soc/northbridge.h b/src/soc/amd/stoneyridge/include/soc/northbridge.h
index 5984637787..7e9b51aa31 100644
--- a/src/soc/amd/stoneyridge/include/soc/northbridge.h
+++ b/src/soc/amd/stoneyridge/include/soc/northbridge.h
@@ -20,12 +20,16 @@
 #include <arch/io.h>
 #include <device/device.h>
 
+/* D18F0 - HT Configuration Registers */
+#define D18F0_NODE_ID		0x60
+#define D18F0_CPU_CNT		0x62 /* BKDG defines as a field in DWORD 0x60 */
+# define CPU_CNT_MASK		0x1f /*  CpuCnt + 1 = no. CPUs */
+
 /* D18F1 - Address Map Registers */
 #define D18F1_DRAM_HOLE		0xf0
 # define DRAM_HOIST_VALID	(1 << 1)
 # define DRAM_HOLE_VALID	(1 << 0)
 
-void cpu_bus_scan(device_t dev);
 void domain_enable_resources(device_t dev);
 void domain_read_resources(device_t dev);
 void domain_set_resources(device_t dev);