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authorSimon Horman <horms@verge.net.au>2011-04-26 06:29:53 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-06-29 10:00:52 +0100
commit090ab3ff8ebb842c0f159d34d57d6e51bd94ace1 (patch)
tree76b2dd13d94313c9ef9d417cc04e38e500ebf07c /arch/arm/Kconfig
parent74facffeca3795ffb5cf8898f5859fbb822e4c5d (diff)
downloadlinux-090ab3ff8ebb842c0f159d34d57d6e51bd94ace1.tar.bz2
ARM: 6886/1: mmc, Add zboot from eSD support for SuperH Mobile ARM
This allows a ROM-able zImage to be written to eSD and for SuperH Mobile ARM to boot directly from the SDHI hardware block. This is achieved by the MaskROM loading the first portion of the image into MERAM and then jumping to it. This portion contains loader code which copies the entire image to SDRAM and jumps to it. From there the zImage boot code proceeds as normal, uncompressing the image into its final location and then jumping to it. Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: Magnus Damm <magnus.damm@gmail.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig33
1 files changed, 25 insertions, 8 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cc0dcbf1f6b5..cd8f520dd03d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1718,17 +1718,34 @@ config ZBOOT_ROM
Say Y here if you intend to execute your compressed kernel image
(zImage) directly from ROM or flash. If unsure, say N.
+choice
+ prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
+ depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
+ default ZBOOT_ROM_NONE
+ help
+ Include experimental SD/MMC loading code in the ROM-able zImage.
+ With this enabled it is possible to write the the ROM-able zImage
+ kernel image to an MMC or SD card and boot the kernel straight
+ from the reset vector. At reset the processor Mask ROM will load
+ the first part of the the ROM-able zImage which in turn loads the
+ rest the kernel image to RAM.
+
+config ZBOOT_ROM_NONE
+ bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
+ help
+ Do not load image from SD or MMC
+
config ZBOOT_ROM_MMCIF
bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
- depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
help
- Say Y here to include experimental MMCIF loading code in the
- ROM-able zImage. With this enabled it is possible to write the
- the ROM-able zImage 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 the ROM-able zImage
- which in turn loads the rest the kernel image to RAM using the
- MMCIF hardware block.
+ Load image from MMCIF hardware block.
+
+config ZBOOT_ROM_SH_MOBILE_SDHI
+ bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
+ help
+ Load image from SDHI hardware block
+
+endchoice
config CMDLINE
string "Default kernel command string"