The generic arm linker script contains this section:
.bss __rel_dyn_start (OVERLAY) : {
...
}
The (OVERLAY) syntax in the description causes the .bss section to be
included in the NOR area of the image:
$ objdump -t -j .bss spl/u-boot-spl
SYMBOL TABLE:
0000c61c l d .bss 00000000 .bss
0000c640 l O .bss 00000040 __value.0
0000c68c g O .bss 00000000 __bss_end
0000c61c g O .bss 00000000 __bss_start
0000c680 g O .bss 0000000c stdio_devices
This is what the custom linker script tries to avoid, as the NOR area is
read-only.
Remove the OVERLAY syntax to fix the BSS location:
$ objdump -t -j .bss spl/u-boot-spl
SYMBOL TABLE:
83000000 l d .bss 00000000 .bss
83000000 l O .bss 00000040 __value.0
0000c61c g O .bss 00000000 __image_copy_end
8300004c g O .bss 00000000 __bss_end
83000000 g O .bss 00000000 __bss_start
83000040 g O .bss 0000000c stdio_devices
This restores the state of the linker script before the patch that fixed
the linker lists issue.
Fixes: f6810b749f ("aspeed/ast2600: Fix SPL linker script")
Signed-off-by: Joel Stanley <joel@jms.id.au>
The commit 99e2fbcb69 ("linker_lists: Rename sections to remove .
prefix") changed the name of the linker list sections. As the Aspeed SPL
linker wasn't in the tree yet, it missed the change.
This updates the SPL linker to match arch/arm/cpu/u-boot-spl.lds which
Aspeed was copied from.
Fixes: 442a69c143 ("configs: ast2600: Move SPL bss section to DRAM space")
Signed-off-by: Joel Stanley <joel@jms.id.au>
AST2600 supports boot from SPI(mmap), eMMC, and UART.
This patch adds the boot mode detection and return the
corresponding boot device type.
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
The commit b583348ca8 ("image: fit: Align hash output buffers") places
the hash output buffer at the .bss section. However, AST2600 by default
executes SPL in the NOR flash XIP way. This results in the hash output
cannot be written to the buffer as it is located at the R/X only region.
We need to move the .bss section out of the SPL body to the DRAM space,
where hash output can be written to. This patch includes:
- Define the .bss section base and size
- A new SPL linker script is added with a separate .bss region specified
- Enable CONFIG_SPL_SEPARATE_BSS kconfig option
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Neal Liu <neal_liu@aspeedtech.com>
Return CONFIG_SYS_LOAD_ADDR pointing to DRAM space for
spl_get_load_buffer() to allow generic SPL image loading
code (e.g. FIT and Ymodem) to store data in DRAM.
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Move this out of the common header and include it only where needed. In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly. Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Add low level platform initialization for the AST2600 SoC.
The 2-stage booting with U-Boot SPL are leveraged to support
different booting mode.
However, currently the patch supports only the booting from
memory-mapped SPI flash.
Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
In the spirit of using the same base name for all of these related macros,
rename this to have the operation at the end. This is not widely used so
the impact is fairly small.
Signed-off-by: Simon Glass <sjg@chromium.org>
to improve the maintainability. It is more easier to modify and add
configurations of the driver in the centralized ram driver directory.
Signed-off-by: Dylan Hung <dylan_hung@aspeedtech.com>
Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
Rename the ast2500-scu.h to aspeed-clock.h.
Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
Reviewed-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Rename the ast2500-board.c to board_common.c and
place the renamed file under the ast2500 folder.
Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
The original lowlevel_init function of AST2500 is written
in C. However, the C runtime environment is not ready until
_main execution.
This patch adds the assembly version of the lowlevel_init
function. Additional initialization to DRAM configuration
and LPC reset source are also added.
Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
At present devres.h is included in all files that include dm.h but few
make use of it. Also this pulls in linux/compat which adds several more
headers. Drop the automatic inclusion and require files to include devres
themselves. This provides a good indication of which files use devres.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Currently, regmap_init_mem() takes a udevice. This requires the node
has already been associated with a device. It prevents syscon/regmap
from behaving like those in Linux.
Change the first argumenet to take a device node.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
Refactor SCU header to use consistent Mask & Shift values.
Now, consistently, to read value from SCU register, mask needs
to be applied before shift.
Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This change switches all existing users of ast2500 Watchdog to Driver
Model based Watchdog driver.
To perform system reset Sysreset Driver uses first Watchdog device found
via uclass_first_device call. Since the system is going to be reset
anyway it does not make much difference which watchdog is used.
Instead of using Watchdog to reset itself, SDRAM driver now uses Reset
driver to do that.
These were the only users of the old Watchdog API, so that API is
removed.
This all is done in one change to avoid having to maintain dual API for
watchdog in between.
Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Make functions for locking and unlocking SCU part of SCU API.
Many drivers need to modify settings in SCU and thus need to unlock it
first. This change makes it possible.
Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This driver supports ast2500 and ast2400 SoCs.
Only ast2500 supports reset_mask and thus the option of resettting
individual peripherals using WDT.
Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add configuration file with parameters that are very likely to be shared by
all ast2500-based boards.
Add ast2500-board.c file with the init code that is very likely to be
shared by all ast2500-based boards.
Reviewed-by: Simon Glass <sjg@chromium.org>
Clock Driver
This driver is ast2500-specific and is not compatible with earlier
versions of this chip. The differences are not that big, but they are
in somewhat random places, so making it compatible with ast2400 is not
worth the effort at the moment.
SDRAM MC driver
The driver is very ast2500-specific and is completely incompatible
with previous versions of the chip.
The memory controller is very poorly documented by Aspeed in the
datasheet, with any mention of the whole range of registers missing. The
initialization procedure has been basically taken from Aspeed SDK, where
it is implemented in assembly. Here it is rewritten in C, with very limited
understanding of what exactly it is doing.
Reviewed-by: Simon Glass <sjg@chromium.org>
Add support for Watchdog Timer, which is compatible with AST2400 and
AST2500 watchdogs. There is no uclass for Watchdog yet, so the driver
does not follow the driver model. It also uses fixed clock, so no clock
driver is needed.
Add support for timer for Aspeed ast2400/ast2500 devices.
The driver actually controls several devices, but because all devices
share the same Control Register, it is somewhat difficult to completely
decouple them. Since only one timer is needed at the moment, this should
be OK. The timer uses fixed clock, so does not rely on a clock driver.
Add sysreset driver, which uses watchdog timer to do resets and particular
watchdog device to use is hardcoded (0)
Reviewed-by: Simon Glass <sjg@chromium.org>
