// SPDX-License-Identifier: BSD-2-Clause
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/*
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* Copyright (c) 2015, Linaro Limited
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* All rights reserved.
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*/
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#include <atomic.h>
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#include <tee_ta_api.h>
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#include <tee_api.h>
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#include <ta_concurrent.h>
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#include <trace.h>
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#include <utee_defines.h>
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TEE_Result TA_CreateEntryPoint(void)
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{
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return TEE_SUCCESS;
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}
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void TA_DestroyEntryPoint(void)
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{
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}
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TEE_Result TA_OpenSessionEntryPoint(uint32_t param_types,
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TEE_Param params[4],
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void **session_ctx)
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{
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(void)param_types;
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(void)params;
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(void)session_ctx;
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return TEE_SUCCESS;
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}
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void TA_CloseSessionEntryPoint(void *session_ctx)
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{
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(void)session_ctx;
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}
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static uint32_t inc_active_count(struct ta_concurrent_shm *shm)
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{
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return atomic_inc32(&shm->active_count);
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}
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static uint32_t dec_active_count(struct ta_concurrent_shm *shm)
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{
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return atomic_dec32(&shm->active_count);
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}
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static TEE_Result ta_entry_busy_loop(uint32_t param_types, TEE_Param params[4])
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{
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size_t num_rounds = 0;
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uint32_t req_param_types =
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TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
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TEE_PARAM_TYPE_VALUE_INOUT,
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TEE_PARAM_TYPE_NONE, TEE_PARAM_TYPE_NONE);
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if (param_types != req_param_types) {
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EMSG("got param_types 0x%x, expected 0x%x",
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param_types, req_param_types);
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return TEE_ERROR_BAD_PARAMETERS;
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}
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if (params[0].memref.size < sizeof(struct ta_concurrent_shm))
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return TEE_ERROR_BAD_PARAMETERS;
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params[1].value.b = inc_active_count(params[0].memref.buffer);
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num_rounds = params[1].value.a;
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while (num_rounds) {
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volatile size_t n = 1000;
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while (n)
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n--;
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num_rounds--;
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}
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dec_active_count(params[0].memref.buffer);
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return TEE_SUCCESS;
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}
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static TEE_Result ta_entry_sha256(uint32_t param_types, TEE_Param params[4])
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{
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TEE_Result res = TEE_ERROR_GENERIC;
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TEE_OperationHandle op = TEE_HANDLE_NULL;
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void *out = NULL;
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uint32_t out_len = 0;
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size_t num_rounds = 0;
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uint32_t req_param_types =
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TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
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TEE_PARAM_TYPE_VALUE_INOUT,
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TEE_PARAM_TYPE_MEMREF_INPUT,
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TEE_PARAM_TYPE_MEMREF_OUTPUT);
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if (param_types != req_param_types) {
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EMSG("got param_types 0x%x, expected 0x%x",
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param_types, req_param_types);
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return TEE_ERROR_BAD_PARAMETERS;
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}
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if (params[0].memref.size < sizeof(struct ta_concurrent_shm))
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return TEE_ERROR_BAD_PARAMETERS;
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if (params[3].memref.size < TEE_SHA256_HASH_SIZE)
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return TEE_ERROR_BAD_PARAMETERS;
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params[1].value.b = inc_active_count(params[0].memref.buffer);
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out_len = params[3].memref.size;
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out = TEE_Malloc(out_len, 0);
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if (!out) {
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res = TEE_ERROR_OUT_OF_MEMORY;
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goto out;
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}
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res = TEE_AllocateOperation(&op, TEE_ALG_SHA256, TEE_MODE_DIGEST, 0);
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if (res != TEE_SUCCESS)
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goto out;
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num_rounds = params[1].value.a;
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while (num_rounds) {
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TEE_ResetOperation(op);
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res = TEE_DigestDoFinal(op, params[2].memref.buffer,
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params[2].memref.size, out, &out_len);
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num_rounds--;
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}
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TEE_MemMove(params[3].memref.buffer, out, out_len);
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params[3].memref.size = out_len;
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out:
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if (out)
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TEE_Free(out);
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if (op)
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TEE_FreeOperation(op);
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dec_active_count(params[0].memref.buffer);
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return res;
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}
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TEE_Result TA_InvokeCommandEntryPoint(void *session_ctx,
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uint32_t cmd_id, uint32_t param_types,
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TEE_Param params[4])
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{
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(void)session_ctx;
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switch (cmd_id) {
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case TA_CONCURRENT_CMD_BUSY_LOOP:
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return ta_entry_busy_loop(param_types, params);
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case TA_CONCURRENT_CMD_SHA256:
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return ta_entry_sha256(param_types, params);
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default:
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return TEE_ERROR_BAD_PARAMETERS;
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}
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}
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