ARM: rmobile: Add recovery SPL for R-Car Gen3

Build an SPL which can be started via SCIF download mode on R-Car Gen3
and allows loading and executing U-Boot uImage with the next stage code.
This is also useful for starting e.g. ATF BL2, which inits the hardware
and returns to the U-Boot SPL, which can then load e.g. U-Boot proper.

The H3, M3-W, M3-N SoCs have plenty of SRAM for storing the U-Boot SPL
while the payload, e.g. ATF BL2, executes, so there is no problem here.

However, E3 and D3 have much less SRAM, hence the loader uses a trick
where it copies itself beyond the area used by BL2 and executes from
there. That area is 32kiB large and not enough to hold U-Boot SPL, BSS,
stack and malloc area, so the later two are placed at +0x4000 offset
from start of SRAM, another area not used by ATF BL2. To make things
even more complicated, the SCIF loader cannot load to the upper 32kiB
of the SRAM directly, hence the copying approach.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

9 files changed, 9 insertions, 0 deletions

diff --git a/configs/r8a7795_salvator-x_defconfig b/configs/r8a7795_salvator-x_defconfig
index feb6180014d..dfe993a1252 100644
--- a/configs/r8a7795_salvator-x_defconfig
+++ b/configs/r8a7795_salvator-x_defconfig
@@ -11,6 +11,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a7795-salvator-x.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6338000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a7795_ulcb_defconfig b/configs/r8a7795_ulcb_defconfig
index 2808a08b359..f85d37c7822 100644
--- a/configs/r8a7795_ulcb_defconfig
+++ b/configs/r8a7795_ulcb_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a7795-h3ulcb.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6338000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a77965_salvator-x_defconfig b/configs/r8a77965_salvator-x_defconfig
index 9f974371402..dc2d49547c3 100644
--- a/configs/r8a77965_salvator-x_defconfig
+++ b/configs/r8a77965_salvator-x_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a77965-salvator-x.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6338000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a77965_ulcb_defconfig b/configs/r8a77965_ulcb_defconfig
index fa76ba5524b..d8d915b2396 100644
--- a/configs/r8a77965_ulcb_defconfig
+++ b/configs/r8a77965_ulcb_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a77965-m3nulcb.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6338000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a7796_salvator-x_defconfig b/configs/r8a7796_salvator-x_defconfig
index e1b159d8dd8..c6f713a8bab 100644
--- a/configs/r8a7796_salvator-x_defconfig
+++ b/configs/r8a7796_salvator-x_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a7796-salvator-x.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6338000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a7796_ulcb_defconfig b/configs/r8a7796_ulcb_defconfig
index 7a738d308c8..5c11d5c44a6 100644
--- a/configs/r8a7796_ulcb_defconfig
+++ b/configs/r8a7796_ulcb_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a7796-m3ulcb.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6338000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a77970_eagle_defconfig b/configs/r8a77970_eagle_defconfig
index d99293d1dc4..d9e23426b39 100644
--- a/configs/r8a77970_eagle_defconfig
+++ b/configs/r8a77970_eagle_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a77970-eagle.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6318000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a77990_ebisu_defconfig b/configs/r8a77990_ebisu_defconfig
index e76bd59c07d..edc7478784c 100644
--- a/configs/r8a77990_ebisu_defconfig
+++ b/configs/r8a77990_ebisu_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a77990-ebisu.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6318000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
diff --git a/configs/r8a77995_draak_defconfig b/configs/r8a77995_draak_defconfig
index cf1fcd82387..39daf983158 100644
--- a/configs/r8a77995_draak_defconfig
+++ b/configs/r8a77995_draak_defconfig
@@ -12,6 +12,7 @@ CONFIG_BOOTARGS="root=/dev/nfs rw nfsroot=192.168.0.1:/export/rfs ip=192.168.0.2
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="r8a77995-draak.dtb"
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_TEXT_BASE=0xe6318000
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y