diff --git a/README b/README
index a52f3bf..a507a1f 100644
--- a/README
+++ b/README
@@ -2275,6 +2275,19 @@
 		all data for the Linux kernel must be between "bootm_low"
 		and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.
 
+- CONFIG_SYS_BOOT_RAMDISK_HIGH:
+		Enable initrd_high functionality.  If defined then the
+		initrd_high feature is enabled and the bootm ramdisk subcommand
+		is enabled.
+
+- CONFIG_SYS_BOOT_GET_CMDLINE:
+		Enables allocating and saving kernel cmdline in space between
+		"bootm_low" and "bootm_low" + BOOTMAPSZ.
+
+- CONFIG_SYS_BOOT_GET_KBD:
+		Enables allocating and saving a kernel copy of the bd_info in
+		space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
+
 - CONFIG_SYS_MAX_FLASH_BANKS:
 		Max number of Flash memory banks
 
diff --git a/arch/m68k/include/asm/config.h b/arch/m68k/include/asm/config.h
index 36438be..ec2cc16 100644
--- a/arch/m68k/include/asm/config.h
+++ b/arch/m68k/include/asm/config.h
@@ -22,5 +22,8 @@
 #define _ASM_CONFIG_H_
 
 #define CONFIG_LMB
+#define CONFIG_SYS_BOOT_RAMDISK_HIGH
+#define CONFIG_SYS_BOOT_GET_CMDLINE
+#define CONFIG_SYS_BOOT_GET_KBD
 
 #endif
diff --git a/arch/powerpc/include/asm/config.h b/arch/powerpc/include/asm/config.h
index d098657..a1942ca 100644
--- a/arch/powerpc/include/asm/config.h
+++ b/arch/powerpc/include/asm/config.h
@@ -22,6 +22,9 @@
 #define _ASM_CONFIG_H_
 
 #define CONFIG_LMB
+#define CONFIG_SYS_BOOT_RAMDISK_HIGH
+#define CONFIG_SYS_BOOT_GET_CMDLINE
+#define CONFIG_SYS_BOOT_GET_KBD
 
 #ifndef CONFIG_MAX_MEM_MAPPED
 #if defined(CONFIG_4xx) || defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
diff --git a/arch/sparc/include/asm/config.h b/arch/sparc/include/asm/config.h
index 36438be..6ddc349 100644
--- a/arch/sparc/include/asm/config.h
+++ b/arch/sparc/include/asm/config.h
@@ -22,5 +22,6 @@
 #define _ASM_CONFIG_H_
 
 #define CONFIG_LMB
+#define CONFIG_SYS_BOOT_RAMDISK_HIGH
 
 #endif
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 25bc39c..ce3c77c 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -472,7 +472,7 @@
 static cmd_tbl_t cmd_bootm_sub[] = {
 	U_BOOT_CMD_MKENT(start, 0, 1, (void *)BOOTM_STATE_START, "", ""),
 	U_BOOT_CMD_MKENT(loados, 0, 1, (void *)BOOTM_STATE_LOADOS, "", ""),
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SPARC)
+#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 	U_BOOT_CMD_MKENT(ramdisk, 0, 1, (void *)BOOTM_STATE_RAMDISK, "", ""),
 #endif
 #ifdef CONFIG_OF_LIBFDT
@@ -528,7 +528,7 @@
 			lmb_reserve(&images.lmb, images.os.load,
 					(load_end - images.os.load));
 			break;
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SPARC)
+#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 		case BOOTM_STATE_RAMDISK:
 		{
 			ulong rd_len = images.rd_end - images.rd_start;
diff --git a/common/image.c b/common/image.c
index dda3025..385464d 100644
--- a/common/image.c
+++ b/common/image.c
@@ -992,7 +992,7 @@
 	return 0;
 }
 
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SPARC)
+#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 /**
  * boot_ramdisk_high - relocate init ramdisk
  * @lmb: pointer to lmb handle, will be used for memory mgmt
@@ -1081,7 +1081,7 @@
 error:
 	return -1;
 }
-#endif /* defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SPARC) */
+#endif /* CONFIG_SYS_BOOT_RAMDISK_HIGH */
 
 #ifdef CONFIG_OF_LIBFDT
 static void fdt_error (const char *msg)
@@ -1588,7 +1588,7 @@
 }
 #endif /* CONFIG_OF_LIBFDT */
 
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
+#ifdef CONFIG_SYS_BOOT_GET_CMDLINE
 /**
  * boot_get_cmdline - allocate and initialize kernel cmdline
  * @lmb: pointer to lmb handle, will be used for memory mgmt
@@ -1630,7 +1630,9 @@
 
 	return 0;
 }
+#endif /* CONFIG_SYS_BOOT_GET_CMDLINE */
 
+#ifdef CONFIG_SYS_BOOT_GET_KBD
 /**
  * boot_get_kbd - allocate and initialize kernel copy of board info
  * @lmb: pointer to lmb handle, will be used for memory mgmt
@@ -1663,7 +1665,7 @@
 
 	return 0;
 }
-#endif /* CONFIG_PPC || CONFIG_M68K */
+#endif /* CONFIG_SYS_BOOT_GET_KBD */
 #endif /* !USE_HOSTCC */
 
 #if defined(CONFIG_FIT)
diff --git a/include/image.h b/include/image.h
index 18a9f0e..49d6280 100644
--- a/include/image.h
+++ b/include/image.h
@@ -340,14 +340,17 @@
 		char **of_flat_tree, ulong *of_size);
 #endif
 
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
+#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 int boot_ramdisk_high (struct lmb *lmb, ulong rd_data, ulong rd_len,
 		  ulong *initrd_start, ulong *initrd_end);
-
+#endif /* CONFIG_SYS_BOOT_RAMDISK_HIGH */
+#ifdef CONFIG_SYS_BOOT_GET_CMDLINE
 int boot_get_cmdline (struct lmb *lmb, ulong *cmd_start, ulong *cmd_end,
 			ulong bootmap_base);
+#endif /* CONFIG_SYS_BOOT_GET_CMDLINE */
+#ifdef CONFIG_SYS_BOOT_GET_KBD
 int boot_get_kbd (struct lmb *lmb, bd_t **kbd, ulong bootmap_base);
-#endif /* CONFIG_PPC || CONFIG_M68K */
+#endif /* CONFIG_SYS_BOOT_GET_KBD */
 #endif /* !USE_HOSTCC */
 
 /*******************************************************************/