sunxi: dram: Remove broken impedance and ODT configuration code
We can safely remove it, because none of the currently supported
boards uses these features.
The existing implementation had multiple problems:
- unnecessary code duplication between sun4i/sun5i/sun7i
- ZQ calibration was never initiated explicitly, and could be
only triggered by setting the highest bit in the 'zq' parameter
in the 'dram_para' struct (this was never actually done for
any of the known Allwinner devices).
- even if the ZQ calibration could be started, no attempts were
made to wait for its completion, or checking whether the
default automatically initiated ZQ calibration is still
in progress
- ODT was only ever enabled on sun4i, but not on sun5i/sun7i
Additionally, SDR_IOCR was set to 0x00cc0000 only on sun4i. There
are some hints in the Rockchip Linux kernel sources, indicating
that these bits are related to the automatic I/O power down
feature, which is poorly understood on sunxi hardware at the
moment. Avoiding to set these bits on sun4i too does not seem to
have any measurable/visible impact.
The impedance and ODT configuration code will be re-introdeced in
one of the next comits.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi: dram: Fix CKE delay handling for sun4i/sun5i
Before driving the CKE pin (Clock Enable) high, the DDR3 spec requires
to wait for additional 500 us after the RESET pin is de-asserted.
The DRAM controller takes care of this delay by itself, using a
configurable counter in the SDR_IDCR register. This works in the same
way on sun4i/sun5i/sun7i hardware (even the default register value
0x00c80064 is identical). Except that the counter is ticking a bit
slower on sun7i (3 DRAM clock cycles instead of 2), resulting in
longer actual delays for the same settings.
This patch configures the SDR_IDCR register for all sun4i/sun5i/sun7i
SoC variants and not just for sun7i alone. Also an explicit udelay(500)
is added immediately after DDR3 reset for extra safety. This is a
duplicated functionality. But since we don't have perfect documentation,
it may be reasonable to play safe. Half a millisecond boot time increase
is not that significant. Boot time can be always optimized later.
Preferebly by the people, who have the hardware equipment to check the
actual signals on the RESET and CKE lines and verify all the timings.
The old code did not configure the SDR_IDCR register for sun4i/sun5i,
but performed the DDR3 reset very early for sun4i/sun5i. This resulted
in a larger time gap between the DDR3 reset and the DDR3 initialization
steps and reduced the chances of CKE delay timing violation to cause
real troubles.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi: dram: Respect the DDR3 reset timing requirements
The RESET pin needs to be kept low for at least 200 us according
to the DDR3 spec. So just do it the right way.
This issue did not cause any visible major problems earlier, because
the DRAM RESET pin is usually already low after the board reset. And
the time gap before reaching the sunxi u-boot DRAM initialization
code appeared to be sufficient.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
If the dram->ppwrsctl (SDR_DPCR) register has the lowest bit set to 1,
this means that DRAM is currently in self-refresh mode and retaining the
old data. Since we have no idea what to do in this situation yet, just
set this register to 0 and initialize DRAM in the same way as on any
normal reboot (discarding whatever was stored there).
This part of code was apparently used by the Allwinner boot0 bootloader
to handle resume from the so-called super-standby mode. But this
particular code got somehow mangled on the way from the boot0 bootloader
to the u-boot-sunxi bootloader and has no chance of doing anything even
remotely sane. For example:
1. in the original boot0 code we had "mctl_write_w(SDR_DPCR,
0x16510000)" (write to the register) and in the u-boot it now looks
like "setbits_le32(&dram->ppwrsctl, 0x16510000)" (set bits in the
register)
2. in the original boot0 code it was issuing three commands "0x12, 0x17,
0x13" (Self-Refresh entry, Self-Refresh exit, Refresh), but in the
u-boot they have become "0x12, 0x12, 0x13" (Self-Refresh entry,
Self-Refresh entry, Refresh)
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi: dram: Remove useless 'dramc_scan_dll_para()' function
The attempt to do DRAM parameters calibration in 'dramc_scan_dll_para()'
function by trying different DLL adjustments and using the hardware
DQS gate training result as a feedback is a great source of inspiration,
but it just can't work properly the way it is implemented now. The fatal
problem of this implementation is that the DQS gating window can be
successfully found for almost every DLL delay adjustment setup that
gets tried. Thus making it unable to see any real difference between
'good' and 'bad' settings.
Also this code was supposed to be only activated by setting the highest
bit in the 'dram_tpr3' variable of the 'dram_para' struct (per-board
dram configuration). But none of the linux-sunxi devices has ever used
it for real. Basically, this code is just a dead weight.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Hans de Goede [Fri, 1 Aug 2014 07:37:58 +0000 (09:37 +0200)]
sunxi: Add environment settings to make extlinux.conf booting work
Automatic booting using an extlinux.conf file requires various environment
variables to be set.
Also modify CONFIG_SYS_LOAD_ADDR and CONFIG_STANDALONE_LOAD_ADDR to match
the value chosen for kernel_addr_r, see the added comment for why the new
value is chosen.
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Stephen Warren <swarren@nvidia.com>
Dennis Gilmore [Wed, 30 Jul 2014 22:37:14 +0000 (16:37 -0600)]
config: introduce a generic $bootcmd
This generic $bootcmd, and associated support macros, automatically
searches a defined set of storage devices (or network protocols) for an
extlinux configuration file or U-Boot boot script in various standardized
locations. Distros that install such a boot config file/script in those
standard locations will get easy-to-set-up booting on HW that enables
this generic $bootcmd.
Boards can define the set of devices from which boot is attempted, and
the order in which they are attempted. Users may later customize this
set/order by edting $boot_targets.
Users may interrupt the boot process and boot from a specific device
simply by executing e.g.:
$ run bootcmd_mmc1
or:
$ run bootcmd_pxe
This patch was originally written by Dennis Gilmore based on Tegra and
rpi_b boot scripts. I have made the following modifications since then:
* Boards must define the BOOT_TARGET_DEVICES macro in order to specify
the set of devices (and order) from which to attempt boot. If needed,
we can define a default directly in config_distro_bootcmd.h.
* Removed $env_import and related variables; nothing used them, and I
think it's better for boards to pre-load an environment customization
file using CONFIG_PREBOOT if they need.
* Renamed a bunch of variables to suit my whims:-)
Signed-off-by: Dennis Gilmore <dennis@ausil.us> Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Marek Vasut <marex@denx.de> Acked-by: Simon Glass <sjg@chromium.org>
Hans de Goede [Fri, 1 Aug 2014 07:19:55 +0000 (09:19 +0200)]
sunxi-common.h: Don't undef CONFIG_CMD_NET only to redefine it again later
config_distro_defaults.h which is include later will redefine CONFIG_CMD_NET,
drop the useless / meaningless undef of it.
While at also move the undef of CONFIG_CMD_FPGA up to directly under the
include of config_cmd_defaults.h, to make it clear that it overwrites
the setting done from config_cmd_defaults.h .
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Hans de Goede [Fri, 1 Aug 2014 07:16:47 +0000 (09:16 +0200)]
sunxi-common.h: Remove dead #ifdef CONFIG_CMD_NET code block
We undef CONFIG_CMD_NET at line 167, and there is nothing re-defining it
between line 167 and the #ifdef CONFIG_CMD_NET, so remove this effectively
dead block.
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Simon Glass [Mon, 7 Jul 2014 16:16:38 +0000 (10:16 -0600)]
exynos: spi: Fix calculation of SPI transaction start time
The SPI transaction delay is supposed to be measured from the end of one
transaction to the start of the next. The code does not work that way, so
fix it.
Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Ajay Kumar <ajaykumar.rs@samsung.com> Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Simon Glass [Fri, 11 Jul 2014 04:23:26 +0000 (22:23 -0600)]
arm: Set up global data before board_init_f()
At present arm defines CONFIG_SYS_GENERIC_GLOBAL_DATA, meaning that
the global_data pointer is set up in board_init_f(). However it is
actually set up before this, it just isn't zeroed.
If we zero the global data before calling board_init_f() then we
don't need to define CONFIG_SYS_GENERIC_GLOBAL_DATA.
Make this change (on arm32 only) to simplify the init process. I
don't have the ability to test aarch64 yet.
Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Tom Rini <trini@ti.com>
When CONFIG_WATCHDOG is defined the board initialization just performs
a WATCHDOG_RESET, an initialization of the watchdog is not done.
This has been modified fot the MPC85xx, the board initialization calls
its watchdog initialitzation allowing for full watchdog configuration
very early in the boot phase.
Signed-off-by: Rainer Boschung <rainer.boschung@keymile.com> Reviewed-by: York Sun <yorksun@freescale.com>
For e500mc cores the watchdog timer period has to be set by means of a
6bit value, that defines the bit of the timebase counter used to signal
a watchdog timer exception on its 0 to 1 transition.
The macro used to set the watchdog period TCR_WP, was redefined for e500mc
to support 6 WP setting.
The parameter (x) given to the macro specifies the prescaling factor of
the time base clock (fTB):
watchdog_period = 1/fTB * 2^x
Signed-off-by: Rainer Boschung <rainer.boschung@keymile.com> Reviewed-by: York Sun <yorksun@freescale.com>
Chin Liang See [Tue, 10 Jun 2014 06:26:52 +0000 (01:26 -0500)]
mmc/dw_mmc: Fix clock divider calculation error for bypass mode
To fix the clock divider calculation error when the controller
clock same as the operating frequency. This is known as bypass
mode. In this mode, the divider should be 0.
Lubomir Rintel [Tue, 10 Jun 2014 18:46:43 +0000 (20:46 +0200)]
bcm2835_sdhci: Add SDHCI_QUIRK_NO_HISPD_BIT flag
Seems like the controller doesn't support the flag. None of the hi-speed cards
I've tried could be read, while they successfully worked with the quirk enabled.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Hans de Goede [Tue, 29 Jul 2014 16:29:27 +0000 (18:29 +0200)]
sun7i: Add bananapi board
The Banana Pi is an A20 based development board using Raspberry Pi compatible
IO headers. It comes with 1 GB RAM, 1 Gb ethernet, 2x USB host, sata, hdmi
and stereo audio out + various expansion headers:
http://www.lemaker.org/
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Marc Zyngier [Fri, 18 Jul 2014 20:06:39 +0000 (21:06 +0100)]
sunxi: HYP/non-sec: configure CNTFRQ on all CPUs
CNTFRQ needs to be properly configured on all CPUs. Otherwise,
virtual machines hoping to find valuable information on secondary
CPUs will be disapointed...
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Hans de Goede [Sun, 27 Jul 2014 20:29:38 +0000 (22:29 +0200)]
sun7i: Add support for a number of new sun7i boards
Add support for boards which I own and which already have a dts file in the
upstream kernel.
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net> Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Hans de Goede [Sun, 27 Jul 2014 15:55:43 +0000 (17:55 +0200)]
sun5i: Add support for a number of new sun5i boards
Add support for boards which I own and which already have a dts file in the
upstream kernel.
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net> Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Hans de Goede [Sat, 26 Jul 2014 14:51:08 +0000 (16:51 +0200)]
sun4i: Add support for a number of new sun4i boards
Add support for boards which I own and which already have a dts file in the
upstream kernel.
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net> Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Roman Byshko [Thu, 24 Jul 2014 20:54:24 +0000 (22:54 +0200)]
sun7i: cubietruck: enable USB EHCI
Cubietruck has two USB host controllers. This makes them
usable by enabling the EHCI driver for them.
Signed-off-by: Roman Byshko <rbyshko@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
[hdegoede@redhat.com: Also enable ehci for Cubietruck_FEL] Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Roman Byshko [Thu, 24 Jul 2014 20:54:23 +0000 (22:54 +0200)]
sun7i: add USB EHCI settings
Specific USB EHCI settings to be set for sun7i if
CONFIG_USB_EHCI is enabled.
Signed-off-by: Roman Byshko <rbyshko@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
[hdegoede@redhat.com: Use SUNXI_GPH macro for SUNXI_USB_VBUS#_GPIO]
[hdegoede@redhat.com: Add #ifndef SUNXI_USB_VBUS#_GPIO to allow override of
the default pins from boards.cfg] Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Roman Byshko [Thu, 24 Jul 2014 20:54:22 +0000 (22:54 +0200)]
sunxi: add general USB settings
General configuration settings to be set if CONFIG_USB_EHCI
is enabled for an Allwinner aka sunxi SoC.
Signed-off-by: Roman Byshko <rbyshko@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Roman Byshko [Thu, 24 Jul 2014 20:54:20 +0000 (22:54 +0200)]
sunxi: add defines to control USB Host clocks/resets
The commit adds three defines which will be used in
the EHCI driver to enable USB clock and assert
reset controllers of the corresponding PHYs.
Signed-off-by: Roman Byshko <rbyshko@gmail.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Ian Campbell [Fri, 18 Jul 2014 19:38:41 +0000 (20:38 +0100)]
ahci: provide sunxi SATA driver using AHCI platform framework
This enables the necessary clocks, in AHB0 and in PLL6_CFG. This is done
for sun7i only since I don't have access to any other sunxi platforms
with sata included.
The PHY setup is derived from the Alwinner releases and Linux, but is mostly
undocumented.
The Allwinner AHCI controller also requires some magic (and, again,
undocumented) DMA initialisation when starting a port. This is added under a
suitable ifdef.
This option is enabled for Cubieboard, Cubieboard2 and Cubietruck based on
contents of Linux DTS files, including SATA power pin config taken from the
DTS. All build tested, but runtime tested on Cubieboard2 and Cubietruck only.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
- Use "make <board>_defconfig" instead of "make <board>_config".
- Invoke tools/genboardscfg.py to generate boards.cfg when it is
missing.
- Show "Building ${BOARD_NAME} board..." message.
(Prior to Kconfig, instead, mkconfig script displayed
"Configuring for ${BOARD_NAME} board..." but it was removed.)
Without this message, we cannot know which board is currently
being built.
- Do not show "# configuration written to .config".
This message is useless and just annoying for MAKEALL.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
The old configuration script is no longer necessary.
Nor is boards.cfg a primary database.
We can generate it with the genboardscfg.py tool
based on the latest Kconfig, defconfig and MAINTAINERS.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
Now the primary data for each board is in Kconfig, defconfig and
MAINTAINERS.
It is true boards.cfg is needed for MAKEALL and buildman and might be
useful to brouse all the supported boards in a single database.
But it would be painful to maintain the boards.cfg in sync.
So, this is the solution.
Add a tool to generate the equivalent boards.cfg file based on
the latest Kconfig, defconfig and MAINTAINERS.
We can keep all the functions of MAKEALL and buildman with it.
The best thing would be to change MAKEALL and buildman for not
depending on boards.cfg in the future, but it would take some time.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
We have switched to Kconfig and the boards.cfg file is going to
be removed. We have to retrieve the board status and maintainers
information from it.
The MAINTAINERS format as in Linux Kernel would be nice
because we can crib the scripts/get_maintainer.pl script.
After some discussion, we chose to put a MAINTAINERS file under each
board directory, not the top-level one because we want to collect
relevant information for a board into a single place.
TODO:
Modify get_maintainer.pl to scan multiple MAINTAINERS files.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Suggested-by: Tom Rini <trini@ti.com> Acked-by: Simon Glass <sjg@chromium.org>
This commit enables Kconfig.
Going forward, we use Kconfig for the board configuration.
mkconfig will never be used. Nor will include/config.mk be generated.
Kconfig must be adjusted for U-Boot because our situation is
a little more complicated than Linux Kernel.
We have to generate multiple boot images (Normal, SPL, TPL)
from one source tree.
Each image needs its own configuration input.
Usage:
Run "make <board>_defconfig" to do the board configuration.
It will create the .config file and additionally spl/.config, tpl/.config
if SPL, TPL is enabled, respectively.
You can use "make config", "make menuconfig" etc. to create
a new .config or modify the existing one.
Use "make spl/config", "make spl/menuconfig" etc. for spl/.config
and do likewise for tpl/.config file.
The generic syntax of configuration targets for SPL, TPL is:
<target_image>/<config_command>
Here, <target_image> is either 'spl' or 'tpl'
<config_command> is 'config', 'menuconfig', 'xconfig', etc.
When the configuration is done, run "make".
(Or "make <board>_defconfig all" will do the configuration and build
in one time.)
For futher information of how Kconfig works in U-Boot,
please read the comment block of scripts/multiconfig.py.
By the way, there is another item worth remarking here:
coexistence of Kconfig and board herder files.
Prior to Kconfig, we used C headers to define a set of configs.
We expect a very long term to migrate from C headers to Kconfig.
Two different infractructure must coexist in the interim.
In our former configuration scheme, include/autoconf.mk was generated
for use in makefiles.
It is still generated under include/, spl/include/, tpl/include/ directory
for the Normal, SPL, TPL image, respectively.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
We are about to switch to Kconfig in the next commit.
But there are something to get done beforehand.
In Kconfig, include/generated/autoconf.h defines boolean
CONFIG macros as 1.
CONFIG_SPL and CONFIG_TPL, if defined, must be set to 1.
Otherwise, when switching to Kconfig, the build log
would be sprinkled with warning messages like this:
warning: "CONFIG_SPL" redefined [enabled by default]
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reviewed-by: Simon Glass <sjg@chromium.org>
This commit adds:
- arch/${ARCH}/Kconfig
provide a menu to select target boards
- board/${VENDOR}/${BOARD}/Kconfig or board/${BOARD}/Kconfig
set CONFIG macros to the appropriate values for each board
- configs/${TARGET_BOARD}_defconfig
default setting of each board
(This commit was automatically generated by a conversion script
based on boards.cfg)
In Linux Kernel, defconfig files are located under
arch/${ARCH}/configs/ directory.
It works in Linux Kernel since ARCH is always given from the
command line for cross compile.
But in U-Boot, ARCH is not given from the command line.
Which means we cannot know ARCH until the board configuration is done.
That is why all the "*_defconfig" files should be gathered into a
single directory ./configs/.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
Since the command name 'make' may not be GNU Make on some platforms
such as FreeBSD, buildman should call scripts/show-gnu-make to get
the command name for GNU MAKE (and error out if it is not found).
Since the command name 'make' may not be GNU Make on some platforms
such as FreeBSD, MAKEALL should call scripts/show-gnu-make to get
the command name for GNU MAKE (and error out if it is not found).
The GNU Make should be searched after parsing options because we want
to allow "MAKEALL -h" even if GNU Make is missing on the system.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
Ma Haijun [Sat, 12 Jul 2014 13:24:06 +0000 (14:24 +0100)]
ARM: convert arch_fixup_memory_node to a generic FDT fixup function
Some architecture needs extra device tree setup. Instead of adding
yet another hook, convert arch_fixup_memory_node to be a generic
FDT fixup function.
[maz: collapsed 3 patches into one, rewrote commit message]
Signed-off-by: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Marc Zyngier [Sat, 12 Jul 2014 13:24:04 +0000 (14:24 +0100)]
ARM: HYP/non-sec: add generic ARMv7 PSCI code
Implement core support for PSCI. As this is generic code, it doesn't
implement anything really useful (all the functions are returning
Not Implemented).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Marc Zyngier [Sat, 12 Jul 2014 13:24:03 +0000 (14:24 +0100)]
ARM: HYP/non-sec: allow relocation to secure RAM
The current non-sec switching code suffers from one major issue:
it cannot run in secure RAM, as a large part of u-boot still needs
to be run while we're switched to non-secure.
This patch reworks the whole HYP/non-secure strategy by:
- making sure the secure code is the *last* thing u-boot executes
before entering the payload
- performing an exception return from secure mode directly into
the payload
- allowing the code to be dynamically relocated to secure RAM
before switching to non-secure.
This involves quite a bit of horrible code, specially as u-boot
relocation is quite primitive.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Marc Zyngier [Sat, 12 Jul 2014 13:24:00 +0000 (14:24 +0100)]
ARM: non-sec: reset CNTVOFF to zero
Before switching to non-secure, make sure that CNTVOFF is set
to zero on all CPUs. Otherwise, kernel running in non-secure
without HYP enabled (hence using virtual timers) may observe
timers that are not synchronized, effectively seeing time
going backward...
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
projects / u-boot / log