49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
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* Copyright (c) 2016-2019, ARM Limited and Contributors. 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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#include <assert.h>
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#include <stdint.h>
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#include <string.h>
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#include <lib/mmio.h>
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#include <plat/common/platform.h>
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#include <platform_def.h>
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#include <tools_share/tbbr_oid.h>
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/*
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* Store a new non-volatile counter value.
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*
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* On some FVP versions, the non-volatile counters are read-only so this
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* function will always fail.
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*
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* Return: 0 = success, Otherwise = error
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*/
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int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr)
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{
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const char *oid;
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uintptr_t nv_ctr_addr;
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assert(cookie != NULL);
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oid = (const char *)cookie;
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if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) {
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nv_ctr_addr = TFW_NVCTR_BASE;
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} else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
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nv_ctr_addr = NTFW_CTR_BASE;
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} else {
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return 1;
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}
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mmio_write_32(nv_ctr_addr, nv_ctr);
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/*
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* If the FVP models a locked counter then its value cannot be updated
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* and the above write operation has been silently ignored.
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*/
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return (mmio_read_32(nv_ctr_addr) == nv_ctr) ? 0 : 1;
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}
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