The R-Car V4H SPL implementation was originally running on the Cortex-R52
core, but this is no longer the case. Majority of the SPL now runs on the
Cortex-A76 core. Drop the stale description.
Fixes: ec53fdee5b ("arm64: renesas: Add Renesas R-Car V4H SPL implementation")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Remove stale Makefile description, this used to be valid for the
original Makefile from which the common Makefile was made generic,
but is no longer applicable to the common Makefile.
Fixes: c7d2d7f90a ("ARM: renesas: Simplify board Makefiles")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Implement custom U_BOOT_FIT_LOADABLE_HANDLER and armv8_switch_to_el2_prep()
handling in case the TFA was loaded. The loadables handler sets up custom
handoff structure used by Renesas TFA fork in fixed location in DRAM and
indicates the TFA has been loaded.
The custom armv8_switch_to_el2_prep() handling tests whether the TFA BL31
was previously loaded and the custom handoff structure was set up, and if
so, jumps to TFA BL31 which switches from EL3 to EL2 and then returns to
U-Boot just past bl in armv8_switch_to_el2() to finish starting the Linux
kernel.
The jump to Linux through TFA works in such a way that the custom
armv8_switch_to_el2_prep() handler configures the custom handoff structure
such that the target jump address of the TFA BL31 on exit is set to the
armv8_switch_to_el2() + 4, which is just past the bl, and just before the
U-Boot code which implements the Linux kernel boot from either EL. The
registers passed through the TFA BL31 are all the registers passed into
armv8_switch_to_el2_prep() to assure maximum compatibility with all the
boot modes. The armv8_switch_to_el2_prep() handler jumps to the TFA BL31,
which does its setup, drops EL from EL3 to EL2 and finally jumps to the
armv8_switch_to_el2() + 4 entry point, which then allows U-Boot to boot
the Linux kernel the usual way.
In order to build suitable kernel fitImage, build TFA first, upstream
is currently under review:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/35799
Or if necessary, downstream repository:
remote: https://github.com/renesas-rcar/arm-trusted-firmware.git
branch: rcar_gen4_v2.7_v4x
```
$ git clean -fqdx
$ MBEDTLS_DIR=/path/to/mbedtls/ make -j$(nproc) bl31 \
PLAT=rcar_gen4 ARCH=aarch64 LSI=V4H SPD=none \
CTX_INCLUDE_AARCH32_REGS=0 MBEDTLS_COMMON_MK=1 \
PTP_NONSECURE_ACCESS=1 LOG_LEVEL=20 DEBUG=0 \
ENABLE_ASSERTIONS=0 E=0
```
Build Linux kernel Image and device tree from current mainline Linux
kernel repository, obtain 'Image' and 'r8a779g0-white-hawk.dtb' .
Bundle the files together using provided fit-image.its fitImage description:
```
$ mkimage -f fit-image.its fitImage
```
To start the kernel fiImage generated in previous step, load fitImage
to DRAM and use the 'bootm' command to start it:
=> load 0x58000000 ... fitImage && bootm 0x58000000
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Move R-Car Gen3 and Gen4 jump_to_image_no_args() into dedicated
rcar64-spl.c file. The implementation of jump_to_image_no_args()
is identical. No functional change.
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Introduce common weak board_early_init_f() in rcar64-common.c
which is the default implementation in case there is no other
board specific board_early_init_f(). Remove board_early_init_f()
from Salvator-X, ULCB and Draak boards where this function is
empty.
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
The common.c content is specific to 64-bit R-Car SoCs, rename
the file to rcar64-common.c and remove R-Car 64-bit ifdeffery
in the file. No functional change.
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Introduce board/renesas/common/Makefile and remove the multiple
duplicate copies of obj := ../common/*.o from board Makefiles.
Let the build system include the common Makefile using the
HAVE_VENDOR_COMMON_LIB and build the common objects that are
shared by all the boards that way. No functional change intended.
Some of the remaining board files which include board specific
settings have been updated to use obj-y += to avoid rewriting
the board obj-y target and avoid dropping object files from the
build.
The board/renesas/common/Makefile is now also used when building
RZG2L targets which also set CONFIG_RCAR_64 symbol and 32bit R-Car
Gen2 targets, however, this common code is specific to 64bit R-Car
only. Inhibit the build of this common code for RZG2L using extra
ifndef CONFIG_RZG2L and do not include any code for R-Car Gen2 so
far.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Rename directory board/renesas/rcar-common to board/renesas/common and
move files. This allows the build system to use HAVE_VENDOR_COMMON_LIB
which automatically includes board/$(VENDOR)/common/Makefile . Create
temporarily empty board/renesas/common/Makefile to be extended with
actual content later in this series. This is a preparatory patch for
board Makefile simplification. No functional change so far.
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
