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>
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>
A new platform macro `PLAT_AMU_GROUP1_COUNTERS_MASK` controls which
group 1 counters should be enabled. The maximum number of group 1
counters supported by AMUv1 is 16 so the mask can be at most 0xffff.
If the platform does not define this mask, no group 1 counters are
enabled.
A related platform macro `PLAT_AMU_GROUP1_NR_COUNTERS` is used by
generic code to allocate an array to save and restore the counters on
CPU suspend.
Change-Id: I6d135badf4846292de931a43bb563077f42bb47b
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>
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: I7ea0c0a00327f463199d1b0a481f01dadb09d312
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
Dimitris Papastamos
Joel Hutton