Blackfin: initial XIP support

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 12 insertions, 4 deletions

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index c0d6d966adec..f46db59eac8a 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -26,9 +26,9 @@ config BLACKFIN
         select HAVE_FUNCTION_GRAPH_TRACER
         select HAVE_FUNCTION_TRACER
         select HAVE_IDE
-        select HAVE_KERNEL_GZIP
-        select HAVE_KERNEL_BZIP2
-        select HAVE_KERNEL_LZMA
+        select HAVE_KERNEL_GZIP if RAMKERNEL
+        select HAVE_KERNEL_BZIP2 if RAMKERNEL
+        select HAVE_KERNEL_LZMA if RAMKERNEL
         select HAVE_OPROFILE
         select ARCH_WANT_OPTIONAL_GPIOLIB
 
@@ -407,10 +407,18 @@ config BOOT_LOAD
 config ROM_BASE
         hex "Kernel ROM Base"
         depends on ROMKERNEL
-        default "0x20040000"
+        default "0x20040040"
         range 0x20000000 0x20400000 if !(BF54x || BF561)
         range 0x20000000 0x30000000 if (BF54x || BF561)
         help
+          Make sure your ROM base does not include any file-header
+          information that is prepended to the kernel.
+
+          For example, the bootable U-Boot format (created with
+          mkimage) has a 64 byte header (0x40).  So while the image
+          you write to flash might start at say 0x20080000, you have
+          to add 0x40 to get the kernel's ROM base as it will come
+          after the header.
 
 comment "Clock/PLL Setup"