sh: add romImage MMCIF boot for sh7724 and Ecovec

@@ -772,6 +772,17 @@ config ENTRY_OFFSET
 	default "0x00010000" if PAGE_SIZE_64KB
 	default "0x00000000"
 
+config ROMIMAGE_MMCIF
+	bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
+	depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
+	help
+	  Say Y here to include experimental MMCIF loading code in
+	  romImage. With this enabled it is possible to write the romImage
+	  kernel image to an MMC card and boot the kernel straight from
+	  the reset vector. At reset the processor Mask ROM will load the
+	  first part of the romImage which in turn loads the rest the kernel
+	  image to RAM using the MMCIF hardware block.
+
 choice
 	prompt "Kernel command line"
 	optional

@@ -6,8 +6,17 @@
 
 targets		:= vmlinux head.o zeropage.bin piggy.o
 
+IMAGE_ADDRESS	:= 0
 OBJECTS = $(obj)/head.o
-LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart \
+
+ifeq ($(CONFIG_ROMIMAGE_MMCIF),y)
+ifeq ($(CONFIG_CPU_SUBTYPE_SH7724),y)
+IMAGE_ADDRESS	:= 0xe5200000 # ILRAM
+OBJECTS += $(obj)/mmcif-sh7724.o
+endif
+endif
+
+LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(IMAGE_ADDRESS) -e romstart \
 		   -T $(obj)/../../kernel/vmlinux.lds
 
 $(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE

@@ -4,14 +4,41 @@
  * Board specific setup code, executed before zImage loader
  */
 
+#include <asm/page.h>
+#include <cpu/addrspace.h>
+
 .text
-	#include <asm/page.h>
 
 	.global	romstart
 romstart:
 	/* include board specific setup code */
 #include <mach/romimage.h>
 
+#ifdef CONFIG_ROMIMAGE_MMCIF
+	mov.l	load_mem_base, r4
+	mov.l	bytes_to_load, r5
+	mov.l	loader_function, r7
+	jsr	@r7
+	 mov	r4, r15
+
+	mov.l	load_mem_base, r4
+	mov.l	loaded_code_offs, r5
+	add	r4, r5
+	jmp	@r5
+	 nop
+
+        .balign 4
+load_mem_base:
+	.long	P1SEG | CONFIG_MEMORY_START | (1 << 20) /* 1 MiB offset */
+bytes_to_load:
+	.long	end_data - romstart
+loader_function:
+	.long	mmcif_loader
+loaded_code_offs:
+	.long	loaded_code - romstart
+loaded_code:
+#endif /* CONFIG_ROMIMAGE_MMCIF */
+
 	/* copy the empty_zero_page contents to where vmlinux expects it */
 	mova	extra_data_pos, r0
 	mov.l	extra_data_size, r1

@@ -3,5 +3,6 @@ SECTIONS
   .text : {
 	zero_page_pos = .;
 	*(.data)
+	end_data = .;
 	}
 }