arm: Refactor bootm to reduce #ifdefs

With fewer #ifdefs the code is more readable and more of the code is
compiled for all boards. Add defines in the header file to control
what features are enabled, and then use if() instead of #ifdef.

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

1 files changed, 20 insertions, 64 deletions

diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index f3b30c57a3..08c11b7c0d 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -37,13 +37,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
-	defined(CONFIG_CMDLINE_TAG) || \
-	defined(CONFIG_INITRD_TAG) || \
-	defined(CONFIG_SERIAL_TAG) || \
-	defined(CONFIG_REVISION_TAG)
 static struct tag *params;
-#endif
 
 static ulong get_sp(void)
 {
@@ -109,11 +103,6 @@ static void announce_and_cleanup(void)
 	cleanup_before_linux();
 }
 
-#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
-	defined(CONFIG_CMDLINE_TAG) || \
-	defined(CONFIG_INITRD_TAG) || \
-	defined(CONFIG_SERIAL_TAG) || \
-	defined(CONFIG_REVISION_TAG)
 static void setup_start_tag (bd_t *bd)
 {
 	params = (struct tag *)bd->bi_boot_params;
@@ -127,9 +116,7 @@ static void setup_start_tag (bd_t *bd)
 
 	params = tag_next (params);
 }
-#endif
 
-#ifdef CONFIG_SETUP_MEMORY_TAGS
 static void setup_memory_tags(bd_t *bd)
 {
 	int i;
@@ -144,9 +131,7 @@ static void setup_memory_tags(bd_t *bd)
 		params = tag_next (params);
 	}
 }
-#endif
 
-#ifdef CONFIG_CMDLINE_TAG
 static void setup_commandline_tag(bd_t *bd, char *commandline)
 {
 	char *p;
@@ -171,9 +156,7 @@ static void setup_commandline_tag(bd_t *bd, char *commandline)
 
 	params = tag_next (params);
 }
-#endif
 
-#ifdef CONFIG_INITRD_TAG
 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
 {
 	/* an ATAG_INITRD node tells the kernel where the compressed
@@ -187,14 +170,11 @@ static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
 
 	params = tag_next (params);
 }
-#endif
 
-#ifdef CONFIG_SERIAL_TAG
-void setup_serial_tag(struct tag **tmp)
+static void setup_serial_tag(struct tag **tmp)
 {
 	struct tag *params = *tmp;
 	struct tag_serialnr serialnr;
-	void get_board_serial(struct tag_serialnr *serialnr);
 
 	get_board_serial(&serialnr);
 	params->hdr.tag = ATAG_SERIAL;
@@ -204,13 +184,10 @@ void setup_serial_tag(struct tag **tmp)
 	params = tag_next (params);
 	*tmp = params;
 }
-#endif
 
-#ifdef CONFIG_REVISION_TAG
-void setup_revision_tag(struct tag **in_params)
+static void setup_revision_tag(struct tag **in_params)
 {
 	u32 rev = 0;
-	u32 get_board_rev(void);
 
 	rev = get_board_rev();
 	params->hdr.tag = ATAG_REVISION;
@@ -218,19 +195,12 @@ void setup_revision_tag(struct tag **in_params)
 	params->u.revision.rev = rev;
 	params = tag_next (params);
 }
-#endif
 
-#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
-	defined(CONFIG_CMDLINE_TAG) || \
-	defined(CONFIG_INITRD_TAG) || \
-	defined(CONFIG_SERIAL_TAG) || \
-	defined(CONFIG_REVISION_TAG)
 static void setup_end_tag(bd_t *bd)
 {
 	params->hdr.tag = ATAG_NONE;
 	params->hdr.size = 0;
 }
-#endif
 
 #ifdef CONFIG_OF_LIBFDT
 static int create_fdt(bootm_headers_t *images)
@@ -274,50 +244,38 @@ __weak void setup_board_tags(struct tag **in_params) {}
 /* Subcommand: PREP */
 static void boot_prep_linux(bootm_headers_t *images)
 {
-#ifdef CONFIG_CMDLINE_TAG
 	char *commandline = getenv("bootargs");
-#endif
 
+	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
 #ifdef CONFIG_OF_LIBFDT
-	if (images->ft_len) {
 		debug("using: FDT\n");
 		if (create_fdt(images)) {
 			printf("FDT creation failed! hanging...");
 			hang();
 		}
-	} else
 #endif
-	{
-#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
-	defined(CONFIG_CMDLINE_TAG) || \
-	defined(CONFIG_INITRD_TAG) || \
-	defined(CONFIG_SERIAL_TAG) || \
-	defined(CONFIG_REVISION_TAG)
+	} else if (BOOTM_ENABLE_TAGS) {
 		debug("using: ATAGS\n");
 		setup_start_tag(gd->bd);
-#ifdef CONFIG_SERIAL_TAG
-		setup_serial_tag(&params);
-#endif
-#ifdef CONFIG_CMDLINE_TAG
-		setup_commandline_tag(gd->bd, commandline);
-#endif
-#ifdef CONFIG_REVISION_TAG
-		setup_revision_tag(&params);
-#endif
-#ifdef CONFIG_SETUP_MEMORY_TAGS
-		setup_memory_tags(gd->bd);
-#endif
-#ifdef CONFIG_INITRD_TAG
-		if (images->rd_start && images->rd_end)
-			setup_initrd_tag(gd->bd, images->rd_start,
-			images->rd_end);
-#endif
+		if (BOOTM_ENABLE_SERIAL_TAG)
+			setup_serial_tag(&params);
+		if (BOOTM_ENABLE_CMDLINE_TAG)
+			setup_commandline_tag(gd->bd, commandline);
+		if (BOOTM_ENABLE_REVISION_TAG)
+			setup_revision_tag(&params);
+		if (BOOTM_ENABLE_MEMORY_TAGS)
+			setup_memory_tags(gd->bd);
+		if (BOOTM_ENABLE_INITRD_TAG) {
+			if (images->rd_start && images->rd_end) {
+				setup_initrd_tag(gd->bd, images->rd_start,
+						 images->rd_end);
+			}
+		}
 		setup_board_tags(&params);
 		setup_end_tag(gd->bd);
-#else /* all tags */
+	} else {
 		printf("FDT and ATAGS support not compiled in - hanging\n");
 		hang();
-#endif /* all tags */
 	}
 }
 
@@ -342,11 +300,9 @@ static void boot_jump_linux(bootm_headers_t *images)
 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
 	announce_and_cleanup();
 
-#ifdef CONFIG_OF_LIBFDT
-	if (images->ft_len)
+	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
 		r2 = (unsigned long)images->ft_addr;
 	else
-#endif
 		r2 = gd->bd->bi_boot_params;
 
 	kernel_entry(0, machid, r2);