Of_unflatten_dtb returns a ERR_PTR value so checking it against NULL is
incorrect. Fix it in all of the places where this was happening.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
At the moment barebox tplink-mr3020.dts file has almost
the same content as linux ar9331_tl_mr3020.dts file
so we can reuse linux dts-file and drop duplicated lines
from barebox dts-file.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The majority of the stuff currently in include/boot.h is about bootm
code implemented common/bootm.c. To be more consistent move it to a
new file include/bootm.h.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
AR9331's WMAC module requires triple WMAC reset as also working RTC
subsystem.
The code is taken as is from upstream U-Boot repository.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Nowadays we have AR9331 devicetree from linux v4.7-rc2
in the file dts/src/mips/qca/ar9331.dtsi.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Also sync black-swift.dts with tplink-mr3020.dts.
And also see this linux kernel commit:
commit 2c3694d2e6ead3964aafb31e4e529de219ced92b
Author: Antony Pavlov <antonynpavlov@gmail.com>
Date: Thu Mar 17 06:34:19 2016 +0300
MIPS: ath79: add initial support for TP-LINK MR3020
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
bootm has a C API, so the bootm options have to depend on the
option providing the bootm code (CONFIG_BOOTM), not on the
option providing the command (CONFIG_CMD_BOOTM). Fixing the
dependencies makes it possible to fully use bootm from C without
enabling the bootm command support.
This also removes the CMD_ prefix from the options which means
we have to update the defconfigs aswell.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
We already have MIPS_CONF_M macro in <asm/mipsregs.h> so
we have no need in homebrew CONFIG_M macro.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
U-Boot_mod is a popular bootloader for Atheros AR93xx chips,
please see https://github.com/pepe2k/u-boot_mod for details.
It's reasonable to import some lowlevel AR9331 initialization
code from U-Boot_mod.
AR9331 (Hornet) 1.1 currently needs an additional
reset at 1st boot. This patch imports necessary code
from u-boot_mod/u-boot/cpu/mips/start_bootstrap.S.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
U-Boot_mod is a popular bootloader for Atheros AR93xx chips,
please see https://github.com/pepe2k/u-boot_mod for details.
It's reasonable to import some lowlevel AR9331 initialization
code from U-Boot_mod.
This patch imports AR9331 MIPS24K coprocessor0 initialization
code from u-boot_mod/u-boot/cpu/mips/start_bootstrap.S.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
We can make the dryrun option more useful by calling into the handlers.
With this we can detect more cases that can go wrong during boot.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
10x performance gain according to simple test on QEMU malta:
barebox:/ time memcpy 0xa0000000 0xa0001000 0x100000
Signed-off-by: Aleksey Kuleshov <rndfax@yandex.ru>
Acked-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
TP-Link MR3020 has 4 MiB flash boot ROM.
Usually boot ROM is mapped to 0xbfc00000.
However, as AR9331 allows to remap boot ROM to 0xbf000000
it's better to assume that boot ROM starts at 0xbf000000.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Black Swift has 16 MiB flash boot ROM. The standard board's
bootloader (U-Boot_mod) remaps boot ROM to 0xbf000000.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Barebox' PBL is able to initialize SoC's memory controller,
but it can be used only if PBL runs from ROM or on-chip SRAM.
MIPS architecture standard boot vector is 0xbfc00000
so on most MIPS SoCs all addresses higher than 0xbfc00000
belong to boot ROM or on-chip SRAM. Thus there's a
simple criterion to check if PBL runs from ROM: just
check if current PC is higher than 0xbfc00000.
Some MIPS boards have ROM start address lower than 0xbfc00000
so it's reasonable to make ROM start address checking board-dependant.
The pbl_blt macro checks if current pc is lower than
the first argument (ROM start address). If so then
next instruction executed is defined by the second argument
of the macro.
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit makes it possible to handle exception on
incorrect data access so 'md' command just show 'xxxxxxxx'
instead of crashing the system.
barebox:/ md -l 0xa0000003+4
a0000003: xxxxxxxx ....
Without this commit we will get this
barebox:/ md -l 0xa0000003+4
a0000003:
Ooops, address error on load or ifetch!
...
### ERROR ### Please RESET the board ###
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit clears ERL (ERror Level) flag on start.
If this flag is set then we get 'TLB miss on load or ifetch'
just after return from exception.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>