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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:13:47 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:13:47 +0000 |
commit | 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 (patch) | |
tree | bcf648efac40ca6139842707f0eba5a4496a6dd2 /lib/extensions/trf/aarch32 | |
parent | Initial commit. (diff) | |
download | arm-trusted-firmware-102b0d2daa97dae68d3eed54d8fe37a9cc38a892.tar.xz arm-trusted-firmware-102b0d2daa97dae68d3eed54d8fe37a9cc38a892.zip |
Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/extensions/trf/aarch32/trf.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/extensions/trf/aarch32/trf.c b/lib/extensions/trf/aarch32/trf.c new file mode 100644 index 0000000..834092d --- /dev/null +++ b/lib/extensions/trf/aarch32/trf.c @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2021, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <stdbool.h> + +#include <arch.h> +#include <arch_helpers.h> +#include <lib/extensions/trf.h> + +static bool trf_supported(void) +{ + uint32_t features; + + features = read_id_dfr0() >> ID_DFR0_TRACEFILT_SHIFT; + return ((features & ID_DFR0_TRACEFILT_MASK) == + ID_DFR0_TRACEFILT_SUPPORTED); +} + +void trf_enable(void) +{ + uint32_t val; + + if (trf_supported()) { + /* + * Allow access of trace filter control registers from + * non-monitor mode + */ + val = read_sdcr(); + val &= ~SDCR_TTRF_BIT; + write_sdcr(val); + } +} |