80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/*
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* Copyright (C) 2016 YunOS Project. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <k_api.h>
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#undef PSR_SP
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#define PSR_SP (1UL << 29)
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static ktask_t *tee_caller_task = NULL;
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static inline uint32_t getcurrentpsr(void)
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{
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uint32_t flags = 0;
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__asm__ __volatile__(
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"ebreak\n" /* TODO */
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);
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return flags;
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}
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static inline void clear_psr_sp(void)
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{
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__asm__ __volatile__ (
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"ebreak\n" /* TODO */
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);
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}
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static inline void set_psr_sp(void)
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{
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__asm__ __volatile__ (
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"ebreak\n" /* TODO */
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);
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}
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void csky_get_tee_caller_task(void)
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{
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uint32_t temp_psr;
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temp_psr = getcurrentpsr();
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if (temp_psr & PSR_SP) {
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tee_caller_task = (tee_caller_task == NULL) ? g_active_task[cpu_cur_get()] : tee_caller_task;
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}
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}
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void csky_deal_tee_caller_task(void)
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{
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uint32_t temp_psr;
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temp_psr = getcurrentpsr();
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if (temp_psr & PSR_SP) {
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if (tee_caller_task != NULL) {
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if (tee_caller_task == g_active_task[cpu_cur_get()]) {
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tee_caller_task = NULL;
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} else {
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clear_psr_sp();
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}
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}
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} else {
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if (tee_caller_task != NULL) {
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if (tee_caller_task == g_active_task[cpu_cur_get()]) {
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tee_caller_task = NULL;
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set_psr_sp();
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}
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}
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}
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}
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