tbbr: Use constant-time bcmp() to compare hashes ...

To avoid timing side-channel attacks, it is needed to use a constant
time memory comparison function when comparing hashes. The affected
code only cheks for equality so it isn't needed to use any variant of
memcmp(), bcmp() is enough.

Also, timingsafe_bcmp() is as fast as memcmp() when the two compared
regions are equal, so this change incurrs no performance hit in said
case. In case they are unequal, the boot sequence wouldn't continue as
normal, so performance is not an issue.

Change-Id: I1c7c70ddfa4438e6031c8814411fef79fd3bb4df
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Merge pull request #800 from masahir0y/ifdef ...

Correct preprocessor conditionals

Merge pull request #815 from hzhuang1/dwmmc_v3.9 ...

drivers: add designware emmc driver

Use #ifdef for IMAGE_BL* instead of #if ...

One nasty part of ATF is some of boolean macros are always defined
as 1 or 0, and the rest of them are only defined under certain
conditions.

For the former group, "#if FOO" or "#if !FOO" must be used because
"#ifdef FOO" is always true.  (Options passed by $(call add_define,)
are the cases.)

For the latter, "#ifdef FOO" or "#ifndef FOO" should be used because
checking the value of an undefined macro is strange.

Here, IMAGE_BL* is handled by make_helpers/build_macro.mk like
follows:

  $(eval IMAGE := IMAGE_BL$(call uppercase,$(3)))

  $(OBJ): $(2)
          @echo "  CC      $$<"
          $$(Q)$$(CC) $$(TF_CFLAGS) $$(CFLAGS) -D$(IMAGE) -c $$< -o $$@

This means, IMAGE_BL* is defined when building the corresponding
image, but *undefined* for the other images.

So, IMAGE_BL* belongs to the latter group where we should use #ifdef
or #ifndef.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

drivers: add designware emmc driver ...

Support Designware eMMC driver. It's based on both IO block
and eMMC driver.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

Merge pull request #812 from antonio-nino-diaz-arm/an/clear-static-vars ...

Clear static variables in X509 parser on error

Clear static variables in X509 parser on error ...

In mbedtls_x509_parser.c there are some static arrays that are filled
during the integrity check and then read whenever an authentication
parameter is requested. However, they aren't cleared in case of an
integrity check failure, which can be problematic from a security
point of view. This patch clears these arrays in the case of failure.

Change-Id: I9d48f5bc71fa13e5a75d6c45b5e34796ef13aaa2
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Merge pull request #790 from masahir0y/utils ...

add utility macros to utils.h

Merge pull request #807 from nmenon/upstream/fix-16650-rx ...

uart: 16550: Fix getc

utils: move BIT(n) macro to utils.h ...

We are duplicating this macro define, and it is useful enough
to be placed in the common place.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

uart: 16550: Fix getc ...

tbz check for RDR status is to check for a bit being zero.
Unfortunately, we are using a mask rather than the bit position.

Further as per http://www.ti.com/lit/ds/symlink/pc16550d.pdf (page 17),
LSR register bit 0 is Data ready status (RDR), not bit position 2.

Update the same to match the specification.

Reported-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>

TBB: fix comment about MBEDTLS_KEY_ALG default ...

This comment block says the default algorithm is ESDSA, while the
code obviously sets the default to RSA:

  ifeq (${MBEDTLS_KEY_ALG},)
      MBEDTLS_KEY_ALG            :=      rsa
  endif

The git log of commit 7d37aa171158 ("TBB: add mbedTLS authentication
related libraries") states available options are:

  * 'rsa' (for RSA-2048) (default option)
  * 'ecdsa' (for ECDSA-SECP256R1)

So, my best guess is the comment block is wrong.

The mismatch between the code and the comment is confusing. Fix it.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

Merge pull request #793 from jeenu-arm/gic-changes ...

GIC driver changes for extended power management

tbbr: Fix updating of Non-Trusted NV counter ...

The previous code required that a certificate be signed with the ROT
key before the platform's NV counter could be updated with the value
in the certificate.  This implies that the Non-Trusted NV counter was
not being updated for Non-Trusted content certificates, as they cannot
be signed with the ROT key in the TBBR CoT scheme.

The code is reworked to only allow updating the platform's Trusted NV
counter when a certificate protected by the Trusted NV counter is
signed with the ROT key.

Content certificates protected by the Non-Trusted NV counter are
allowed to update the platform's Non-Trusted NV counter, assuming
that the certificate value is higher than the platform's value.

A new optional platform API has been introduced, named
plat_set_nv_ctr2().  Platforms may choose to implement it and perform
additional checks based on the authentication image descriptor before
modifying the NV counters.  A default weak implementation is available
that just calls into plat_set_nv_ctr().

Fixes ARM-software/tf-issues#426

Change-Id: I4fc978fd28a3007bc0cef972ff1f69ad0413b79c
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

GICv3: Introduce power management APIs for Redistributor ...

Some GICv3 implementations have provision for power management
operations at Redistributor level. This patch introduces and provides
place-holders for Redistributor power management. The default
implementations are empty stubs, but are weakly bound so as to enable
implementation-specific drivers to override them.

Change-Id: I4fec1358693d3603ca5dce242a2f7f0e730516d8
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

AArch32: Miscellaneous fixes in the AArch32 code ...

This patch makes following miscellaneous fixes:
* pl011_console.S: Fixed the bit mask used to check if the
  transmit FIFO is full or empty.
* smcc_macros.S: Added `_fsxc` suffix while updating the SPSR.
  By default the assembler assumes `_fc` suffix which does not
  update all the fields in SPSR. By adding `_fsxc` suffix all
  the fields gets updated.
* platform_helpers.S: Removed the weak definition for
  `plat_my_core_pos()` as this is a mandatory function which
  needs to be defined by all platforms.

Change-Id: I8302292533c943686fff8d7c749a07132c052a3b
Signed-off-by: Yatharth Kochar <yatharth.kochar@arm.com>

Merge pull request #677 from hzhuang1/gpt ...

partition: check GPT partition table

partition: check GPT partition table ...

Now only support GPT partition table. MBR partition table isn't
supported yet.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

GICv3: Allow either G1S or G0 interrupts to be configured ...

Currently the GICv3 driver mandates that platform populate
both G1S and G0 interrupts. However, it is possible that a
given platform is not interested in both the groups and
just needs to specify either one of them.

This patch modifies the `gicv3_rdistif_init()` & `gicv3_distif_init()`
functions to allow either G1S or G0 interrupts to be configured.

Fixes ARM-software/tf-issues#400

Change-Id: I43572b0e08ae30bed5af9334f25d35bf439b0d2b

Merge pull request #678 from soby-mathew/sm/PSCI_AArch32 ...

Introduce AArch32 support for PSCI library

Merge pull request #682 from sudeep-holla/gicv3_ns_intr ...

gicv3: disable Group1 NonSecure interrupts during core powerdown

Merge pull request #680 from hzhuang1/emmc_cmd23_v2 ...

emmc: support CMD23

emmc: support CMD23 ...

Support CMD23. When CMD23 is used, CMD12 could be avoided.

Two scenarios:
1. CMD17 for single block, CMD18 + CMD12 for multiple blocks.
2. CMD23 + CMD18 for both single block and multiple blocks.

The emmc_init() should initialize whether CMD23 is supported
or not.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

gicv3: disable Group1 NonSecure interrupts during core powerdown ...

As per the GICv3 specification, to power down a processor using GICv3
and allow automatic power-on if an interrupt must be sent to a processor,
software must set Enable to zero for all interrupt groups(by writing to
GICC_CTLR or ICC_IGRPEN{0,1}_EL1/3 as appropriate.

Also, NonSecure EL1 software may not be aware of the CPU power state
details and fail to choose right states that require quiescing the CPU
interface. So it's preferred that the PSCI implementation handles it as
it is fully aware of the CPU power states.

This patch adds disabling of Group1 NonSecure interrupts during processor
power down along with Group0 and Group1 Secure interrupts so that all the
interrupt groups are handled at once as per specification.

Change-Id: Ib564d773c9c4c41f2ca9471451c030e3de75e641

AArch32: Add console driver ...

This patch adds console drivers including the pl011 driver
for the AArch32 mode.

Change-Id: Ifd22520d370fca3e73dbbf6f2d97d6aee65b67dd

AArch32: Enable GIC and TZC support ...

This patch modifies GICv3 and TZC drivers to add AArch32 support.
No modifications are required for the GICv2 driver for AArch32 support.
The TZC driver assumes that the secure world is running in Little-Endian
mode to do 64 bit manipulations. Assertions are present to validate the
assumption.

Note: The legacy GICv3 driver is not supported for AArch32.

Change-Id: Id1bc75a9f5dafb9715c9500ca77b4606eb1e2458

Move console drivers to AArch64 folder ...

This patch moves the various assembly console drivers
into `aarch64` architecture specific folder. Stub files,
which include files from new location, are retained at the
original location for platform compatibility reasons.

Change-Id: I0069b6c1c0489ca47f5204d4e26e3bc3def533a8

io: block: fix unaligned buffer ...

If buffer address parameter isn't aligned, it may cause
DMA issue in block device driver, as eMMC. Now check the buffer
address. If it's not aligned, use temporary buffer in io block
driver instead.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

GICv3: Fix the GICD_IROUTER offset ...

This patch fixes the offset of GICD_IROUTER register defined in gicv3.h.
Although the GICv3 documention mentions that the offset for this register
is 0x6100-0x7FD8, the offset calculation for an interrupt id `n` is :

   0x6000 + 8n, where n >= 32

This requires the offset for GICD_IROUTER to be defined as 0x6000.

Fixes ARM-software/tf-issues#410

Change-Id: If9e91e30d946afe7f1f60fea4f065c7567093fa8

Rework type usage in Trusted Firmware ...

This patch reworks type usage in generic code, drivers and ARM platform files
to make it more portable. The major changes done with respect to
type usage are as listed below:

* Use uintptr_t for storing address instead of uint64_t or unsigned long.
* Review usage of unsigned long as it can no longer be assumed to be 64 bit.
* Use u_register_t for register values whose width varies depending on
  whether AArch64 or AArch32.
* Use generic C types where-ever possible.

In addition to the above changes, this patch also modifies format specifiers
in print invocations so that they are AArch64/AArch32 agnostic. Only files
related to upcoming feature development have been reworked.

Change-Id: I9f8c78347c5a52ba7027ff389791f1dad63ee5f8