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ARMv8.6 adds virtual offset registers to support virtualization of the
event counters in EL1 and EL0.  This patch enables support for this
feature in EL3 firmware.
Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I7ee1f3d9f554930bf5ef6f3d492e932e6d95b217

Following f3ccf036

 the INFO print in amu_enable is causing
a lot of print outs on UART1 in DEBUG mode especially on PSCI test
cases because CPU_ON or SUSPEND operations call:
cm_prepare_el3_exit => enable_extensions_nonsecure => amu_enable.
PSCI SUSPEND is also very frequent in linux boot cases causing test
timeout failures.
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I63581f8fa489d44b3b1d10af3b7f6fdf3af44720

This patch fixes the bug when AMUv1 group1 counters was
always assumed being implemented without checking for its
presence which was causing exception otherwise.
The AMU extension code was also modified as listed below:
- Added detection of AMUv1 for ARMv8.6
- 'PLAT_AMU_GROUP1_NR_COUNTERS' build option is removed and
number of group1 counters 'AMU_GROUP1_NR_COUNTERS' is now
calculated based on 'AMU_GROUP1_COUNTERS_MASK' value
- Added bit fields definitions and access functions for
AMCFGR_EL0/AMCFGR and AMCGCR_EL0/AMCGCR registers
- Unification of amu.c Aarch64 and Aarch32 source files
- Bug fixes and TF-A coding style compliant changes.

Change-Id: I14e407be62c3026ebc674ec7045e240ccb71e1fb
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>

Enforce full include path for includes. Deprecate old paths.

The following folders inside include/lib have been left unchanged:

- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}

The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).

For example, this patch had to be created because two headers were
called the same way: e0ea0928 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3 ("drivers: add tzc380 support").

This problem was introduced in commit 4ecca339

 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.

Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.

Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

No functional changes.

Change-Id: I2f28f20944f552447ac4e9e755493cd7c0ea1192
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Change-Id: I38470528111410cf12b187eb1397d87b812c9416
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

AArch32 uses odd-even pairs when passing 64-bit arguments to
functions.  For example in `amu_group0_cnt_write_internal()` the
second argument is a uint64_t which is passed in r2 and r3.

In `amu_group1_set_evtype_internal()` the value that needs to be
written to the system register is in r1 not in r0.

Change-Id: I20196268fdb1dc9ef6c4ebe61e761fba9623b3f2
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

Before suspend the AMU counters should be enabled and after resume
they should be disabled.  Assert that to be consistent with the
AArch64 implementation of `amu_context_{save,restore}()`.

Change-Id: Ia46f77e4062b93afb93721a2890a9b9d2a7f300e
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

Add amu_context_save() and amu_context_restore() functions for aarch32

Change-Id: I4df83d447adeaa9d9f203e16dc5a919ffc04d87a
Signed-off-by: Joel Hutton <joel.hutton@arm.com>

Change-Id: Id6dfe885a63561b1d2649521bd020367b96ae1af
Signed-off-by: Joel Hutton <joel.hutton@arm.com>

If AMU is not supported by the hardware but it is enabled in Trusted
Firmware, the console will be spammed with warnings every time a CPU
is brought up with a CPU ON call.

Remove the warning message as this is more in line with how other
extensions like SPE and SVE are handled.

Change-Id: Iba6d367e4d1375ab554d23d2eaceab3ae1362c5a
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

On some systems, the AMU counters might reset to 0 when a CPU
powerdown happens.  This behaviour conflicts with the intended
use-case of AMU as lower ELs are only expected to see non-decreasing
counter values.

Change-Id: If25519965d4e6e47e09225d0e732947986cbb5ec
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

Add some AMU helper functions to allow configuring, reading and
writing of the Group 0 and Group 1 counters.  Documentation for these
helpers will come in a separate patch.

Change-Id: I656e070d2dae830c22414f694aa655341d4e2c40
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

The `ENABLE_AMU` build option can be used to enable the
architecturally defined AMU counters.  At present, there is no support
for the auxiliary counter group.

Change-Id: Ifc7532ef836f83e629f2a146739ab61e75c4abc8
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>