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/amd/picasso/cpu.c

@@ -63,21 +63,21 @@ static int get_cpu_count(void)
 static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
 				size_t *smm_save_state_size)
 {
-	void *smm_base;
+	uintptr_t smm_base;
 	size_t smm_size;
-	void *handler_base;
+	uintptr_t handler_base;
 	size_t handler_size;
 
 	/* Initialize global tracking state. */
 	smm_region(&smm_base, &smm_size);
 	smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
 
-	relo_attrs.smbase = (uint32_t)smm_base;
+	relo_attrs.smbase = smm_base;
 	relo_attrs.tseg_base = relo_attrs.smbase;
 	relo_attrs.tseg_mask = ALIGN_DOWN(~(smm_size - 1), 128 * KiB);
 	relo_attrs.tseg_mask |= SMM_TSEG_WB;
 
-	*perm_smbase = (uintptr_t)handler_base;
+	*perm_smbase = handler_base;
 	*perm_smsize = handler_size;
 	*smm_save_state_size = sizeof(amd64_smm_state_save_area_t);
 }

src/soc/amd/picasso/ramtop.c

@@ -81,9 +81,9 @@ static size_t smm_region_size(void)
 	return CONFIG_SMM_TSEG_SIZE;
 }
 
-void smm_region(void **start, size_t *size)
+void smm_region(uintptr_t *start, size_t *size)
 {
-	*start = (void *)smm_region_start();
+	*start = smm_region_start();
 	*size = smm_region_size();
 }
 
@@ -109,15 +109,13 @@ static void clear_tvalid(void)
 	wrmsr(SMM_MASK_MSR, mask);
 }
 
-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;
 	const size_t cache_size = CONFIG_SMM_RESERVED_SIZE;
 
-	sub_base = smm_region_start();
-	sub_size = smm_region_size();
-
+	smm_region(&sub_base, &sub_size);
 	assert(sub_size > CONFIG_SMM_RESERVED_SIZE);
 
 	switch (sub) {

src/soc/amd/picasso/romstage.c

@@ -43,9 +43,8 @@ asmlinkage void car_stage_entry(void)
 {
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
-	void *smm_base;
+	uintptr_t smm_base;
 	size_t smm_size;
-	uintptr_t tseg_base;
 	int s3_resume = acpi_s3_resume_allowed() && acpi_is_wakeup_s3();
 
 	console_init();
@@ -92,8 +91,7 @@ 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, MTRR_TYPE_WRBACK);
+	postcar_frame_add_mtrr(&pcf, smm_base, smm_size, MTRR_TYPE_WRBACK);
 
 	post_code(0x45);
 	run_postcar_phase(&pcf);