lib: Refactor bmp_load_logo() implementation

This refactoring ensures bmp_load_logo() takes logo_size as an
argument, returning a valid logo_ptr only if logo_size is non-zero.

This prevents potential errors from mismatched size assumption.

BUG=b:242829490
TEST=google/rex0 builds successfully.

Change-Id: I14bc54670a67980ec93bc366b274832d1f959e50
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81618
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Dinesh Gehlot <digehlot@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/drivers/intel/fsp1_1/ramstage.c

@@ -76,9 +76,11 @@ static void fsp_run_silicon_init(FSP_INFO_HEADER *fsp_info_header)
 		load_vbt(&silicon_init_params);
 	mainboard_silicon_init_params(&silicon_init_params);
 
-	if (CONFIG(BMP_LOGO))
-		bmp_load_logo(&silicon_init_params.PcdLogoPtr,
-			      &silicon_init_params.PcdLogoSize);
+	if (CONFIG(BMP_LOGO)) {
+		size_t logo_size;
+		silicon_init_params.PcdLogoPtr = (uint32_t)(uintptr_t)bmp_load_logo(&logo_size);
+		silicon_init_params.PcdLogoSize = (uint32_t)logo_size;
+	}
 
 	/* Display the UPD data */
 	if (CONFIG(DISPLAY_UPD_DATA))

src/drivers/intel/fsp2_0/fsp_gop_blt.c

@@ -237,13 +237,15 @@ void fsp_convert_bmp_to_gop_blt(uint32_t *logo, uint32_t *logo_size,
 	uint32_t *blt_ptr, uint32_t *blt_size,
 	uint32_t *pixel_height, uint32_t *pixel_width)
 {
-	uint32_t logo_ptr, logo_ptr_size, blt_buffer_size;
+	uint32_t logo_ptr;
+	size_t logo_ptr_size, blt_buffer_size;
 	efi_bmp_image_header *bmp_header;
 
 	if (!logo || !logo_size || !blt_ptr || !blt_size || !pixel_height || !pixel_width)
 		return;
 
-	bmp_load_logo(&logo_ptr, &logo_ptr_size);
+	logo_ptr = (uint32_t)(uintptr_t)bmp_load_logo(&logo_ptr_size);
+
 	if (!logo_ptr || logo_ptr_size < sizeof(efi_bmp_image_header)) {
 		printk(BIOS_ERR, "%s: BMP Image size is too small.\n", __func__);
 		return;

src/include/bootsplash.h

@@ -20,7 +20,7 @@ void set_bootsplash(unsigned char *framebuffer, unsigned int x_resolution,
  * For example: Introduce configurable BMP logo for customization on platforms like ChromeOS
  */
 const char *bmp_logo_filename(void);
-void bmp_load_logo(uint32_t *logo_ptr, uint32_t *logo_size);
+void *bmp_load_logo(size_t *logo_size);
 void bmp_release_logo(void);
 
 #endif

src/lib/bmp_logo.c

@@ -16,25 +16,27 @@ const char *bmp_logo_filename(void)
 }
 #endif
 
-void bmp_load_logo(uint32_t *logo_ptr, uint32_t *logo_size)
+void *bmp_load_logo(size_t *logo_size)
 {
 	void *logo_buffer;
 
 	/* CBMEM is locked for S3 resume path. */
 	if (acpi_is_wakeup_s3())
-		return;
+		return NULL;
 
 	logo_entry = cbmem_entry_add(CBMEM_ID_FSP_LOGO, 1 * MiB);
 	if (!logo_entry)
-		return;
+		return NULL;
 
 	logo_buffer = cbmem_entry_start(logo_entry);
 	if (!logo_buffer)
-		return;
+		return NULL;
 
 	*logo_size = cbfs_load(bmp_logo_filename(), logo_buffer, 1 * MiB);
-	if (*logo_size)
-		*logo_ptr = (uintptr_t)logo_buffer;
+	if (*logo_size == 0)
+		return NULL;
+
+	return logo_buffer;
 }
 
 void bmp_release_logo(void)

src/soc/amd/mendocino/fsp_s_params.c

@@ -55,6 +55,6 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 
 void soc_load_logo(FSPS_UPD *supd)
 {
-	uint32_t logo_size;
-	bmp_load_logo(&supd->FspsConfig.logo_bmp_buffer, &logo_size);
+	size_t logo_size;
+	supd->FspsConfig.logo_bmp_buffer = (uint32_t)(uintptr_t)bmp_load_logo(&logo_size);
 }

src/soc/intel/apollolake/chip.c

@@ -915,7 +915,9 @@ void mainboard_silicon_init_params(FSP_S_CONFIG *silconfig)
 /* Handle FSP logo params */
 void soc_load_logo(FSPS_UPD *supd)
 {
-	bmp_load_logo(&supd->FspsConfig.LogoPtr, &supd->FspsConfig.LogoSize);
+	size_t logo_size;
+	supd->FspsConfig.LogoPtr = (uint32_t)(uintptr_t)bmp_load_logo(&logo_size);
+	supd->FspsConfig.LogoSize = (uint32_t)logo_size;
 }
 
 BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, spi_flash_init_cb, NULL);

src/soc/intel/cannonlake/fsp_params.c

@@ -754,5 +754,7 @@ __weak void mainboard_silicon_init_params(FSPS_UPD *supd)
 /* Handle FSP logo params */
 void soc_load_logo(FSPS_UPD *supd)
 {
-	bmp_load_logo(&supd->FspsConfig.LogoPtr, &supd->FspsConfig.LogoSize);
+	size_t logo_size;
+	supd->FspsConfig.LogoPtr = (uintptr_t)bmp_load_logo(&logo_size);
+	supd->FspsConfig.LogoSize = (uint32_t)logo_size;
 }

src/soc/intel/skylake/chip.c

@@ -529,5 +529,7 @@ __weak void mainboard_silicon_init_params(FSP_S_CONFIG *params)
 /* Handle FSP logo params */
 void soc_load_logo(FSPS_UPD *supd)
 {
-	bmp_load_logo(&supd->FspsConfig.LogoPtr, &supd->FspsConfig.LogoSize);
+	size_t logo_size;
+	supd->FspsConfig.LogoPtr = (uint32_t)(uintptr_t)bmp_load_logo(&logo_size);
+	supd->FspsConfig.LogoSize = (uint32_t)logo_size;
 }