soc/intel: Consolidate FSP CAR setup and teardown code

This patch adds following changes,

- APL, CFL, DENVERTON soc's using same implementation to setup and
  teardown FSP CAR. Hence cache_as_ram_fsp.S from soc folder is
  cosolidated into one file and moved to common code CPU car folder.
- exit_car_fsp.S is from APL, DNV soc folder is clubbed into one file
  and moved to common CPU car.
- The new file apollolake/fspcar.c is addded to pass tempraminit
  parameters.

- Coffee lake Soc uses FSPT to support Intel Security features like
  BootGuard verify boot and Measured boot. Add FSP CAR support for CFL
  by programming tempraminit parameters and add FSP_T_XIP default if
  FSP_CAR is selected.

BUG= None
TEST= Build for both CFL RVP11 & RVP8 and verified for successful CAR setup.
      Build for both leafhill and harcuvar platform by selecting CONFIG_FSP_CAR
      without errors.

Change-Id: I98d2dd9711ddc0d7ea7d1672fba700259ee3a3a9
Signed-off-by: Praveen hodagatta pranesh <praveenx.hodagatta.pranesh@intel.com>
Reviewed-on: https://review.coreboot.org/29209
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/cpu/car/exit_car_fsp.S b/src/soc/intel/common/block/cpu/car/exit_car_fsp.S
new file mode 100644
index 0000000000..4ac580ce6f
--- /dev/null
+++ b/src/soc/intel/common/block/cpu/car/exit_car_fsp.S
@@ -0,0 +1,38 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Intel Corp.
+ *
+ * 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.
+ */
+
+#include <cpu/x86/mtrr.h>
+#include <cpu/x86/cr.h>
+
+/*
+ * This path for CAR teardown is taken when CONFIG_FSP_CAR is employed.
+ * This version of chipset_teardown_car sets up the stack, then bypasses
+ * the rest of arch/x86/exit_car.S and calls main() itself instead of
+ * returning to _start. In main(), the TempRamExit FSP API is called
+ * to tear down the CAR and set up caching which can be overwritten
+ * after the API call.  More info can be found in the FSP Integration
+ * Guide included with the FSP binary.
+ */
+
+.text
+.global chipset_teardown_car
+chipset_teardown_car:
+
+	/* Set up new stack. */
+	mov	post_car_stack_top, %esp
+
+	/* Call C code */
+	call	main