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8374508b00
Adding AP/RSS interface for retrieving and incrementing non-volatile
counters.
The read interface implements the psa_call:
psa_call(RSS_PLATFORM_SERVICE_HANDLE,
RSS_PLATFORM_API_ID_NV_READ,
in_vec, 1, out_vec, 1);
where the in_vec indicates which of the 3 counters we want, and the
out_vec stores the counter value we get back from RSS.
The increment interface implements the psa_call:
psa_call(RSS_PLATFORM_SERVICE_HANDLE,
RSS_PLATFORM_API_ID_NV_INCREMENT,
in_vec, 1, (psa_outvec *)NULL, 0);
where, again, in_vec indicates the counter to increment, and we don't
get any output parameter from RSS.
Through this service, we will be able to get/increment any of the 3 NV
counters used on a CCA platform:
- NV counter for CCA firmware (BL2, BL31, RMM).
- NV counter for secure firmware.
- NV counter for non-secure firmware.
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Signed-off-by: Raef Coles <raef.coles@arm.com>
Change-Id: I4c1c7f4837ebff30de16bb0ce7ecd416b70b1f62
44 lines
989 B
C
44 lines
989 B
C
/*
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* Copyright (c) 2023, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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*/
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#ifndef RSS_PLATFORM_API_H
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#define RSS_PLATFORM_API_H
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#include <stdint.h>
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#include "psa/error.h"
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#define RSS_PLATFORM_API_ID_NV_READ (1010)
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#define RSS_PLATFORM_API_ID_NV_INCREMENT (1011)
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/*
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* Increments the given non-volatile (NV) counter by one
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*
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* counter_id NV counter ID.
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*
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* PSA_SUCCESS if the value is read correctly. Otherwise,
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* it returns a PSA_ERROR.
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*/
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psa_status_t
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rss_platform_nv_counter_increment(uint32_t counter_id);
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/*
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* Reads the given non-volatile (NV) counter
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*
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* counter_id NV counter ID.
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* size Size of the buffer to store NV counter value
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* in bytes.
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* val Pointer to store the current NV counter value.
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*
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* PSA_SUCCESS if the value is read correctly. Otherwise,
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* it returns a PSA_ERROR.
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*/
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psa_status_t
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rss_platform_nv_counter_read(uint32_t counter_id,
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uint32_t size, uint8_t *val);
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#endif /* RSS_PLATFORM_API_H */
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