spl: Allow disabling binman symbols in SPL

When CONFIG_SPL_FIT is enabled we do not access U-Boot directly in
the image, since it is embedded in a FIT which is parsed at runtime.

Provide a CONFIG option to drop the symbols in this case.

Signed-off-by: Simon Glass <sjg@chromium.org>

common/spl/Kconfig

@@ -101,6 +101,18 @@ config SPL_SHOW_ERRORS
 
 	  This adds a small amount to SPL code size, perhaps 100 bytes.
 
+config SPL_BINMAN_SYMBOLS
+	bool "Declare binman symbols in SPL"
+	depends on SPL_FRAMEWORK && BINMAN
+	default y
+	help
+	  This enables use of symbols in SPL which refer to U-Boot, enabling SPL
+	  to obtain the location of U-Boot simply by calling spl_get_image_pos()
+	  and spl_get_image_size().
+
+	  For this to work, you must have a U-Boot image in the binman image, so
+	  binman can update SPL with the location of it.
+
 menu "PowerPC and LayerScape SPL Boot options"
 
 config SPL_NAND_BOOT
@@ -1321,6 +1333,18 @@ config TPL_SIZE_LIMIT
 	  Specifies the maximum length of the U-Boot TPL image.
 	  If this value is zero, it is ignored.
 
+config TPL_BINMAN_SYMBOLS
+	bool "Declare binman symbols in SPL"
+	depends on SPL_FRAMEWORK && BINMAN
+	default y
+	help
+	  This enables use of symbols in TPL which refer to U-Boot, enabling SPL
+	  to obtain the location of U-Boot simply by calling spl_get_image_pos()
+	  and spl_get_image_size().
+
+	  For this to work, you must have a U-Boot image in the binman image, so
+	  binman can update SPL with the location of it.
+
 config TPL_FRAMEWORK
 	bool "Support TPL based upon the common SPL framework"
 	default y if SPL_FRAMEWORK

common/spl/spl.c

@@ -49,9 +49,11 @@ DECLARE_GLOBAL_DATA_PTR;
 
 u32 *boot_params_ptr = NULL;
 
+#if CONFIG_IS_ENABLED(BINMAN_SYMBOLS)
 /* See spl.h for information about this */
 binman_sym_declare(ulong, u_boot_any, image_pos);
 binman_sym_declare(ulong, u_boot_any, size);
+#endif
 
 #ifdef CONFIG_TPL
 binman_sym_declare(ulong, u_boot_spl, image_pos);
@@ -140,6 +142,7 @@ void spl_fixup_fdt(void *fdt_blob)
 #endif
 }
 
+#if CONFIG_IS_ENABLED(BINMAN_SYMBOLS)
 ulong spl_get_image_pos(void)
 {
 	return spl_phase() == PHASE_TPL ?
@@ -153,6 +156,7 @@ ulong spl_get_image_size(void)
 		binman_sym(ulong, u_boot_spl, size) :
 		binman_sym(ulong, u_boot_any, size);
 }
+#endif /* BINMAN_SYMBOLS */
 
 ulong spl_get_image_text_base(void)
 {