sh: add romImage MMCIF boot for sh7724 and Ecovec V2

This patch is V2 of the MMCIF romImage boot support
for sh7724 and the Ecovec board. With this patch
applied and CONFIG_ROMIMAGE_MMCIF selected the
romImage kernel image can be written to a MMC card
and booted directly by the sh7724 cpu.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index c5ee4ce60b57..22d25113d76a 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -776,6 +776,17 @@ 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