arch/x86: Change smm_subregion() prototype

Do this to avoid some amount of explicit typecasting
that would be required otherwise.

Change-Id: I5bc2c3c1dd579f7c6c3d3354c0691e4ba3c778e1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34706
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/soc/intel/skylake/include/soc/smm.h

@@ -30,10 +30,10 @@ struct ied_header {
 } __packed;
 
 struct smm_relocation_params {
-	u32 smram_base;
-	u32 smram_size;
-	u32 ied_base;
-	u32 ied_size;
+	uintptr_t smram_base;
+	size_t smram_size;
+	uintptr_t ied_base;
+	size_t ied_size;
 	msr_t smrr_base;
 	msr_t smrr_mask;
 	msr_t emrr_base;

src/soc/intel/skylake/memmap.c

@@ -25,14 +25,15 @@
 #include <intelblocks/systemagent.h>
 #include <soc/msr.h>
 #include <soc/pci_devs.h>
+#include <soc/smm.h>
 #include <soc/systemagent.h>
 #include <stdlib.h>
 
 #include "chip.h"
 
-void smm_region(void **start, size_t *size)
+void smm_region(uintptr_t *start, size_t *size)
 {
-	*start = (void *)sa_get_tseg_base();
+	*start = sa_get_tseg_base();
 	*size = sa_get_tseg_size();
 }
 
@@ -47,16 +48,14 @@ void smm_region(void **start, size_t *size)
  *     |         (TSEG)          |
  *     +-------------------------+ TSEG
  */
-int smm_subregion(int sub, void **start, size_t *size)
+int smm_subregion(int sub, uintptr_t *start, size_t *size)
 {
 	uintptr_t sub_base;
 	size_t sub_size;
-	void *smm_base;
 	const size_t ied_size = CONFIG_IED_REGION_SIZE;
 	const size_t cache_size = CONFIG_SMM_RESERVED_SIZE;
 
-	smm_region(&smm_base, &sub_size);
-	sub_base = (uintptr_t)smm_base;
+	smm_region(&sub_base, &sub_size);
 
 	switch (sub) {
 	case SMM_SUBREGION_HANDLER:
@@ -78,9 +77,8 @@ int smm_subregion(int sub, void **start, size_t *size)
 		return -1;
 	}
 
-	*start = (void *)sub_base;
+	*start = sub_base;
 	*size = sub_size;
-
 	return 0;
 }
 

src/soc/intel/skylake/romstage/romstage_fsp20.c

@@ -173,9 +173,8 @@ asmlinkage void car_stage_entry(void)
 	postcar_frame_add_mtrr(&pcf, top_of_ram, 16*MiB, MTRR_TYPE_WRBACK);
 
 	if (CONFIG(HAVE_SMI_HANDLER)) {
-		void *smm_base;
+		uintptr_t smm_base;
 		size_t smm_size;
-		uintptr_t tseg_base;
 
 		/*
 		 * Cache the TSEG region at the top of ram. This region is
@@ -185,8 +184,7 @@ asmlinkage void car_stage_entry(void)
 		 * region for other purposes.
 		 */
 		smm_region(&smm_base, &smm_size);
-		tseg_base = (uintptr_t)smm_base;
-		postcar_frame_add_mtrr(&pcf, tseg_base, smm_size,
+		postcar_frame_add_mtrr(&pcf, smm_base, smm_size,
 					MTRR_TYPE_WRBACK);
 	}
 

src/soc/intel/skylake/smmrelocate.c

@@ -182,11 +182,7 @@ void smm_relocation_handler(int cpu, uintptr_t curr_smbase,
 
 static void fill_in_relocation_params(struct smm_relocation_params *params)
 {
-	void *handler_base;
-	size_t handler_size;
-	void *ied_base;
-	size_t ied_size;
-	void *tseg_base;
+	uintptr_t tseg_base;
 	size_t tseg_size;
 	u32 emrr_base;
 	u32 emrr_size;
@@ -201,14 +197,8 @@ static void fill_in_relocation_params(struct smm_relocation_params *params)
 	phys_bits = cpuid_eax(0x80000008) & 0xff;
 
 	smm_region(&tseg_base, &tseg_size);
-	smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
-	smm_subregion(SMM_SUBREGION_CHIPSET, &ied_base, &ied_size);
-
-	params->smram_size = handler_size;
-	params->smram_base = (uintptr_t)handler_base;
-
-	params->ied_base = (uintptr_t)ied_base;
-	params->ied_size = ied_size;
+	smm_subregion(SMM_SUBREGION_HANDLER, &params->smram_base, &params->smram_size);
+	smm_subregion(SMM_SUBREGION_CHIPSET, &params->ied_base, &params->ied_size);
 
 	/* SMRR has 32-bits of valid address aligned to 4KiB. */
 	params->smrr_base.lo = (params->smram_base & rmask) | MTRR_TYPE_WRBACK;
@@ -251,8 +241,8 @@ static void setup_ied_area(struct smm_relocation_params *params)
 
 	ied_base = (void *)params->ied_base;
 
-	printk(BIOS_DEBUG, "IED base = 0x%08x\n", params->ied_base);
-	printk(BIOS_DEBUG, "IED size = 0x%08x\n", params->ied_size);
+	printk(BIOS_DEBUG, "IED base = 0x%08x\n", (u32) params->ied_base);
+	printk(BIOS_DEBUG, "IED size = 0x%08x\n", (u32) params->ied_size);
 
 	/* Place IED header at IEDBASE. */
 	memcpy(ied_base, &ied, sizeof(ied));