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  1. 05 Mar, 2018 1 commit
  3. 01 Mar, 2018 2 commits
    • Dan Handley's avatar
      Emit warnings when using deprecated GIC init · dcf01a0a
      Dan Handley authored 
      

Emit runtime warnings when intializing the GIC drivers using the
deprecated method of defining integer interrupt arrays in the GIC driver
data structures; interrupt_prop_t arrays should be used instead. This
helps platforms detect that they have migration work to do. Previously,
no warning was emitted in this case. This affects both the GICv2 and GICv3
drivers.

Also use the __deprecated attribute to emit a build time warning if these
deprecated fields are used. These warnings are suppressed in the GIC
driver compatibility functions but will be visible if platforms use them.

Change-Id: I6b6b8f6c3b4920c448b6dcb82fc18442cfdf6c7a
Signed-off-by: default avatarDan Handley <dan.handley@arm.com>
      dcf01a0a
    • Dan Handley's avatar
      Improve MULTI_CONSOLE_API deprecation warnings · bc1a03c7
      Dan Handley authored 
      

For platforms that have not migrated to MULTI_CONSOLE_API == 1, there
are a lot of confusing deprecated declaration warnings relating to
use of console_init() and console_uninit(). Some of these relate to use
by the generic code, not the platform code. These functions are not really
deprecated but *removed* when MULTI_CONSOLE_API == 1.

This patch consolidates these warnings into a single preprocessor warning.
The __deprecated attribute is removed from the console_init() and
console_uninit() declarations.

For preprocessor warnings like this to not cause fatal build errors,
this patch adds -Wno-error=cpp to the build flags when
ERROR_DEPRECATED == 0.
This option (and -Wno-error=deprecated-declarations) is now added to
CPPFLAGS instead of TF_CFLAGS to ensure the build flags are used in the
assembler as well as the compiler.

This patch also disentangles the MULTI_CONSOLE_API and ERROR_DEPRECATED
build flags by defaulting MULTI_CONSOLE_API to 0 instead of
ERROR_DEPRECATED. This allows platforms that have not migrated to
MULTI_CONSOLE_API to use ERROR_DEPRECATED == 1 to emit a more meaningful
build error.

Finally, this patch bans use of MULTI_CONSOLE_API == 1 and AARCH32, since
the AArch32 console implementation does not support
MULTI_CONSOLE_API == 1.

Change-Id: If762165ddcb90c28aa7a4951aba70cb15c2b709c
Signed-off-by: default avatarDan Handley <dan.handley@arm.com>
      bc1a03c7
  5. 28 Feb, 2018 3 commits
  7. 26 Feb, 2018 1 commit
  9. 24 Feb, 2018 1 commit
  11. 21 Feb, 2018 1 commit
  13. 14 Feb, 2018 1 commit
    • Antonio Nino Diaz's avatar
      Remove URLs from comments · fb1198b1
      Antonio Nino Diaz authored 
      

This fixes all defects according to MISRA Rule 3.1: "The character
sequences /* and // shall not be used within a comment". This affects
all URLs in comments, so they have been removed:

- The link in `sdei_state.c` can also be found in the documentation file
  `docs/sdei.rst`.

- The bug that the file `io_fip.c` talks about doesn't affect the
  currently supported version of GCC, so it doesn't make sense to keep
  the comment. Note that the version of GCC officially supported is the
  one that comes with Linaro Release 17.10, which is GCC 6.2.

- The link in `tzc400.c` was broken, and it didn't correctly direct to
  the Technical Reference Manual it should. The link has been replaced
  by the title of the document, which is more convenient when looking
  for the document.

Change-Id: I89f60c25f635fd4c008a5d3a14028f814c147bbe
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      fb1198b1
  15. 25 Jan, 2018 1 commit
    • Julius Werner's avatar
      delay_timer: Guarantee that delay time can never be undershot · e2aec918
      Julius Werner authored 
      

Delay functions like udelay() are often used to ensure that the
necessary time passed to allow some asynchronous event to finish, such
as the stabilization delay for a power rail. For these use cases it is
not very problematic if the delay is slightly longer than requested,
but it is critical that the delay must never be shorter.

The current udelay() implementation contains two hazards that may cause
the delay to be slightly shorter than intended: Firstly, the amount of
ticks to wait is calculated with an integer division, which may cut off
the last fraction of ticks needed. Secondly, the delay may be short by a
fraction of a tick because we do not know whether the initial ("start")
sample of the timer was near the start or near the end of the current
tick. Thus, if the code intends to wait for one tick, it might read the
timer value close to the end of the current tick and then read it again
right after the start of the next tick, concluding that the duration of
a full tick has passed when it in fact was just a fraction of it.

This patch rounds up the division and always adds one extra tick to
counteract both problems and ensure that delays will always be larger
but never smaller than requested.

Change-Id: Ic5fe5f858b5cdf3c0dbf3e488d4d5702d9569433
Signed-off-by: default avatarJulius Werner <jwerner@chromium.org>
      e2aec918
  17. 24 Jan, 2018 1 commit
  19. 19 Jan, 2018 4 commits
  21. 18 Jan, 2018 1 commit
  23. 17 Jan, 2018 1 commit
  25. 11 Jan, 2018 1 commit
  27. 13 Dec, 2017 1 commit
    • Roberto Vargas's avatar
      io: block: fix block_read/write may read/write overlap buffer · e19e40af
      Roberto Vargas authored 
      

The block operations were trying to optimize the number of memory
copies, and it tried to use directly the buffer supplied by the user
to them. This was a mistake because it created too many corner cases:

	1- It was possible to generate unaligned
	   operations to unaligned buffers. Drivers that were using
	   DMA transfer failed in that case.

	2- It was possible to generate read operations
	   with sizes that weren't a multiple of the block size. Some
	   low level drivers assumed that condition and they calculated
	   the number of blocks dividing the number of bytes by the
	   size of the block, without considering the remaining bytes.

	3- The block_* operations didn't control the
	   number of bytes actually copied to memory, because the
	   low level drivers were writing directly to the user buffer.

This patch rewrite block_read and block_write to use always the device
buffer, which the platform ensures that has the correct aligment and
the correct size.

Change-Id: I5e479bb7bc137e6ec205a8573eb250acd5f40420
Signed-off-by: default avatarQixiang Xu <qixiang.xu@arm.com>
Signed-off-by: default avatarRoberto Vargas <roberto.vargas@arm.com>
      e19e40af
  29. 12 Dec, 2017 1 commit
    • Julius Werner's avatar
      Add new function-pointer-based console API · 9536bae6
      Julius Werner authored 
      

This patch overhauls the console API to allow for multiple console
instances of different drivers that are active at the same time. Instead
of binding to well-known function names (like console_core_init),
consoles now provide a register function (e.g. console_16550_register())
that will hook them into the list of active consoles. All console
operations will be dispatched to all consoles currently in the list.

The new API will be selected by the build-time option MULTI_CONSOLE_API,
which defaults to ${ERROR_DEPRECATED} for now. The old console API code
will be retained to stay backwards-compatible to older platforms, but
should no longer be used for any newly added platforms and can hopefully
be removed at some point in the future.

The new console API is intended to be used for both normal (bootup) and
crash use cases, freeing platforms of the need to set up the crash
console separately. Consoles can be individually configured to be active
active at boot (until first handoff to EL2), at runtime (after first
handoff to EL2), and/or after a crash. Console drivers should set a sane
default upon registration that can be overridden with the
console_set_scope() call. Code to hook up the crash reporting mechanism
to this framework will be added with a later patch.

This patch only affects AArch64, but the new API could easily be ported
to AArch32 as well if desired.

Change-Id: I35c5aa2cb3f719cfddd15565eb13c7cde4162549
Signed-off-by: default avatarJulius Werner <jwerner@chromium.org>
      9536bae6
  31. 21 Nov, 2017 1 commit
  33. 13 Nov, 2017 2 commits
    • Jeenu Viswambharan's avatar
      GIC: Fix Group 0 enabling · 385f1dbb
      Jeenu Viswambharan authored 
      

At present, the GIC drivers enable Group 0 interrupts only if there are
Secure SPIs listed in the interrupt properties/list. This means that,
even if there are Group 0 SGIs/PPIs configured, the group remained
disabled in the absence of a Group 0 SPI.

Modify both GICv2 and GICv3 SGI/PPI configuration to enable Group 0 when
corresponding SGIs/PPIs are present.

Change-Id: Id123e8aaee0c22b476eebe3800340906d83bbc6d
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      385f1dbb
    • Jeenu Viswambharan's avatar
      GICv2: Fix populating PE target data · 058efeef
      Jeenu Viswambharan authored 
      

This patch brings in the following fixes:

  - The per-PE target data initialized during power up needs to be
    flushed so as to be visible to other PEs.

  - Setup per-PE target data for the primary PE as well. At present,
    this was only setup for secondary PEs when they were powered on.

Change-Id: Ibe3a57c14864e37b2326dd7ab321a5c7bf80e8af
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      058efeef
  35. 08 Nov, 2017 1 commit
    • Etienne Carriere's avatar
      ARMv7: GICv2 driver can manage GICv1 with security extension · 64deed19
      Etienne Carriere authored 
      

Some SoCs integrate a GIC in version 1 that is currently not supported
by the trusted firmware. This change hijacks GICv2 driver to handle the
GICv1 as GICv1 is compatible enough with GICv2 as far as the platform
does not attempt to play with virtualization support or some GICv2
specific power features.

Note that current trusted firmware does not use these GICv2 features
that are not available in GICv1 Security Extension.

Change-Id: Ic2cb3055f1319a83455571d6d918661da583f179
Signed-off-by: default avatarEtienne Carriere <etienne.carriere@linaro.org>
      64deed19
  37. 16 Oct, 2017 12 commits
  39. 06 Oct, 2017 1 commit
  41. 05 Oct, 2017 2 commits
    • Soby Mathew's avatar
      GICv3: ITS architectural save and restore helpers · b258278e
      Soby Mathew authored 
      

This patch adds functions to save and restore GICv3 ITS registers during
system suspend. Please note that the power management of GIC ITS is
implementation defined. These functions only implements the
architectural part of the ITS power management and they do not restore
memory structures or register content required to support ITS. Even if
the ITS implementation stores structures in memory, an implementation
defined power down sequence is likely to be required to flush some
internal ITS caches to memory. If such implementation defined sequence
is not followed, the platform must ensure that the ITS is not power
gated during system suspend.

Change-Id: I5f31e5541975aa7dcaab69b0b7f67583c0e27678
Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
Signed-off-by: default avatarDouglas Raillard <douglas.raillard@arm.com>
      b258278e
    • Soby Mathew's avatar
      GICv3: add functions for save and restore · ebf1ca10
      Soby Mathew authored 
      

During system suspend, the GICv3 Distributor and Redistributor context
can be lost due to power gating of the system power domain. This means
that the GICv3 context needs to be saved prior to system suspend and
restored on wakeup. Currently the consensus is that the Firmware should
be in charge of this. See tf-issues#464 for more details.

This patch introduces helper APIs in the GICv3 driver to save and
restore the Distributor and Redistributor contexts. The GICv3 ITS
context is not considered in this patch because the specification says
that the details of ITS power management is implementation-defined.
These APIs are expected to be appropriately invoked by the platform
layer during system suspend.

Fixes ARM-software/tf-issues#464

Change-Id: Iebb9c6770ab8c4d522546f161fa402d2fe02ec00
Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
Signed-off-by: default avatarDouglas Raillard <douglas.raillard@arm.com>
      ebf1ca10