intel: update common and FSP cache-as-ram parameters

Instead of just passing bits, tsc_low, tsc_high, and an
opaque pointer to chipset context those fields are bundled
into a cache_as_ram_params struct. Additionally, a new
struct fsp_car_context is created to hold the FSP
information. These could be combined as the existing
romstage code assumes what the chipset_context values are, but
I'm leaving the concept of "common" alone for the time being.
While working in that area the ABI between assembly and C code
has changed to just pass a single pointer to cache_as_ram_params
struct. Lastly, validate the bootloader cache-as-ram region
with the Kconfig options.

BUG=chrome-os-partner:44676
BRANCH=None
TEST=Built and booted glados.

Original-Change-Id: Ib2a0e38477ef7c15cff1836836cfb55e5dc8a58e
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/300190
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-by: Leroy P Leahy <leroy.p.leahy@intel.com>

Change-Id: Ic5a0daa4e2fe5eda0c4d2a45d86baf14ff7b2c6c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11809
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/soc/intel/common/raminit.c b/src/soc/intel/common/raminit.c
index bdb23e2..932d5c3 100644
--- a/src/soc/intel/common/raminit.c
+++ b/src/soc/intel/common/raminit.c
@@ -57,6 +57,7 @@
 	unsigned long int data;
 	EFI_PEI_HOB_POINTERS hob_ptr;
 #endif
+	struct fsp_car_context *fsp_car_context;
 
 	/*
 	 * Find and copy the UPD region to the stack so the platform can modify
@@ -68,7 +69,8 @@
 	 * region in the FSP binary.
 	 */
 	post_code(0x34);
-	fsp_header = params->chipset_context;
+	fsp_car_context = params->chipset_context;
+	fsp_header = fsp_car_context->fih;
 	vpd_ptr = (VPD_DATA_REGION *)(fsp_header->CfgRegionOffset +
 					fsp_header->ImageBase);
 	printk(BIOS_DEBUG, "VPD Data: 0x%p\n", vpd_ptr);
@@ -167,7 +169,7 @@
 	}
 
 	/* Save the FSP runtime parameters. */
-	fsp_set_runtime(params->chipset_context, hob_list_ptr);
+	fsp_set_runtime(fsp_header, hob_list_ptr);
 
 	/* Lookup the FSP_BOOTLOADER_TOLUM_HOB */
 	cbmem_root = get_next_resource_hob(&bootldr_tolum_guid, hob_list_ptr);