intel/haswell: Move stage_cache support function

Let garbage-collection take care of stage_cache_external_region()
if it is no needed and move implementation to a suitable file already
building for needed stages.

Remove aliasing CONFIG_RESERVED_SMM_SIZE as RESERVED_SMM_SIZE.

Change-Id: Ie6fcc40fba14575e8ee058f45a1a359a05f00aca
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34668
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/cpu/intel/haswell/Makefile.inc

@@ -7,12 +7,8 @@ romstage-y += ../car/romstage.c
 postcar-y += tsc_freq.c
 
 ramstage-y += acpi.c
-ramstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
 ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smmrelocate.c
 
-romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
-postcar-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
-
 smm-y += finalize.c
 smm-y += tsc_freq.c
 

src/cpu/intel/haswell/haswell.h

@@ -118,15 +118,9 @@
 /* Data is passed through bits 31:0 of the data register. */
 #define BIOS_MAILBOX_DATA			0x5da0
 
-/* Region of SMM space is reserved for multipurpose use. It falls below
- * the IED region and above the SMM handler. */
-#define RESERVED_SMM_SIZE CONFIG_SMM_RESERVED_SIZE
-#define RESERVED_SMM_OFFSET \
-	(CONFIG_SMM_TSEG_SIZE - CONFIG_IED_REGION_SIZE - RESERVED_SMM_SIZE)
-
 /* Sanity check config options. */
-#if (CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + RESERVED_SMM_SIZE))
-# error "CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + RESERVED_SMM_SIZE)"
+#if (CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + CONFIG_SMM_RESERVED_SIZE))
+# error "CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + CONFIG_SMM_RESERVED_SIZE)"
 #endif
 #if (CONFIG_SMM_TSEG_SIZE < 0x800000)
 # error "CONFIG_SMM_TSEG_SIZE must at least be 8MiB"

src/cpu/intel/haswell/smmrelocate.c

@@ -250,7 +250,7 @@ static void fill_in_relocation_params(struct device *dev,
 	params->ied_size = tseg_size - params->smram_size;
 
 	/* Adjust available SMM handler memory size. */
-	params->smram_size -= RESERVED_SMM_SIZE;
+	params->smram_size -= CONFIG_SMM_RESERVED_SIZE;
 
 	/* SMRR has 32-bits of valid address aligned to 4KiB. */
 	params->smrr_base.lo = (params->smram_base & rmask) | MTRR_TYPE_WRBACK;

src/cpu/intel/haswell/stage_cache.c

@@ -1,26 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2015 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.
- */
-
-#include <cbmem.h>
-#include <stage_cache.h>
-#include "haswell.h"
-
-void stage_cache_external_region(void **base, size_t *size)
-{
-	/* The ramstage cache lives in the TSEG region at RESERVED_SMM_OFFSET.
-	 * The top of RAM is defined to be the TSEG base address. */
-	*size = RESERVED_SMM_SIZE;
-	*base = (void *)((uint32_t)cbmem_top() + RESERVED_SMM_OFFSET);
-}

src/northbridge/intel/haswell/ram_calc.c

@@ -18,6 +18,7 @@
 
 #include <device/pci_ops.h>
 #include <cbmem.h>
+#include <stage_cache.h>
 #include "haswell.h"
 
 static uintptr_t smm_region_start(void)
@@ -34,3 +35,16 @@ void *cbmem_top(void)
 {
 	return (void *)smm_region_start();
 }
+
+/* Region of SMM space is reserved for multipurpose use. It falls below
+ * the IED region and above the SMM handler. */
+#define RESERVED_SMM_OFFSET \
+	(CONFIG_SMM_TSEG_SIZE - CONFIG_IED_REGION_SIZE - CONFIG_SMM_RESERVED_SIZE)
+
+void stage_cache_external_region(void **base, size_t *size)
+{
+	/* The ramstage cache lives in the TSEG region at RESERVED_SMM_OFFSET.
+	 * The top of RAM is defined to be the TSEG base address. */
+	*size = CONFIG_SMM_RESERVED_SIZE;
+	*base = (void *)((uint32_t)cbmem_top() + RESERVED_SMM_OFFSET);
+}