soc/intel/apollolake: Use SMM library to get tseg region information

This patch uses smm common library function to get tseg base
address and size. Hence removing definitions of smm_region()
from soc directory.

BRANCH=none
BUG=b:63974384
TEST=Build and boot reef successfully.

Change-Id: I091ca90cf576c0da35cf3fe010f8c22a18ef82d9
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/21291
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/cpu.c

@@ -178,7 +178,7 @@ static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
 	const uint32_t rmask = ~((1 << 12) - 1);
 
 	/* Initialize global tracking state. */
-	smm_region(&smm_base, &smm_size);
+	smm_region_info(&smm_base, &smm_size);
 	smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
 
 	relo_attrs.smbase = (uint32_t)smm_base;

src/soc/intel/apollolake/memmap.c

@@ -28,40 +28,24 @@
 #include <cbmem.h>
 #include <device/pci.h>
 #include <fsp/memmap.h>
+#include <intelblocks/smm.h>
 #include <soc/systemagent.h>
 #include <soc/pci_devs.h>
 
-static uintptr_t smm_region_start(void)
-{
-	return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, TSEG), 1*MiB);
-}
-
-static size_t smm_region_size(void)
-{
-	uintptr_t smm_end =
-		ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, BGSM), 1*MiB);
-	return smm_end - smm_region_start();
-}
-
 void *cbmem_top(void)
 {
-	return (void *)smm_region_start();
-}
-
-void smm_region(void **start, size_t *size)
-{
-	*start = (void *)smm_region_start();
-	*size = smm_region_size();
+	return (void *)sa_get_tseg_base();
 }
 
 int smm_subregion(int sub, void **start, size_t *size)
 {
 	uintptr_t sub_base;
 	size_t sub_size;
+	void *smm_base;
 	const size_t cache_size = CONFIG_SMM_RESERVED_SIZE;
 
-	sub_base = smm_region_start();
-	sub_size = smm_region_size();
+	smm_region_info(&smm_base, &sub_size);
+	sub_base = (uintptr_t)smm_base;
 
 	assert(sub_size > CONFIG_SMM_RESERVED_SIZE);
 

src/soc/intel/apollolake/romstage.c

@@ -33,6 +33,7 @@
 #include <fsp/memmap.h>
 #include <fsp/util.h>
 #include <intelblocks/cpulib.h>
+#include <intelblocks/smm.h>
 #include <intelblocks/systemagent.h>
 #include <intelblocks/pmclib.h>
 #include <reset.h>
@@ -269,7 +270,7 @@ asmlinkage void car_stage_entry(void)
 	* when relocating the SMM handler as well as using the TSEG
 	* region for other purposes.
 	*/
-	smm_region(&smm_base, &smm_size);
+	smm_region_info(&smm_base, &smm_size);
 	tseg_base = (uintptr_t)smm_base;
 	postcar_frame_add_mtrr(&pcf, tseg_base, smm_size, MTRR_TYPE_WRBACK);