simmel-bootloader/lib/sdk/components/libraries/util/app_util_platform.c

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/**
* Copyright (c) 2014 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "app_util_platform.h"
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#ifdef SOFTDEVICE_PRESENT
/* Global nvic state instance, required by nrf_nvic.h */
nrf_nvic_state_t nrf_nvic_state;
#endif
static uint32_t m_in_critical_region = 0;
void app_util_disable_irq(void)
{
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__disable_irq();
m_in_critical_region++;
}
void app_util_enable_irq(void)
{
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m_in_critical_region--;
if (m_in_critical_region == 0)
{
__enable_irq();
}
}
void app_util_critical_region_enter(uint8_t *p_nested)
{
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#if __CORTEX_M == (0x04U)
ASSERT(APP_LEVEL_PRIVILEGED == privilege_level_get())
#endif
#if defined(SOFTDEVICE_PRESENT)
/* return value can be safely ignored */
(void) sd_nvic_critical_region_enter(p_nested);
#else
app_util_disable_irq();
#endif
}
void app_util_critical_region_exit(uint8_t nested)
{
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#if __CORTEX_M == (0x04U)
ASSERT(APP_LEVEL_PRIVILEGED == privilege_level_get())
#endif
#if defined(SOFTDEVICE_PRESENT)
/* return value can be safely ignored */
(void) sd_nvic_critical_region_exit(nested);
#else
app_util_enable_irq();
#endif
}
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uint8_t privilege_level_get(void)
{
#if __CORTEX_M == (0x00U) || defined(_WIN32) || defined(__unix) || defined(__APPLE__)
/* the Cortex-M0 has no concept of privilege */
return APP_LEVEL_PRIVILEGED;
#elif __CORTEX_M == (0x04U)
uint32_t isr_vector_num = __get_IPSR() & IPSR_ISR_Msk ;
if (0 == isr_vector_num)
{
/* Thread Mode, check nPRIV */
int32_t control = __get_CONTROL();
return control & CONTROL_nPRIV_Msk ? APP_LEVEL_UNPRIVILEGED : APP_LEVEL_PRIVILEGED;
}
else
{
/* Handler Mode, always privileged */
return APP_LEVEL_PRIVILEGED;
}
#endif
}
uint8_t current_int_priority_get(void)
{
uint32_t isr_vector_num = __get_IPSR() & IPSR_ISR_Msk ;
if (isr_vector_num > 0)
{
int32_t irq_type = ((int32_t)isr_vector_num - EXTERNAL_INT_VECTOR_OFFSET);
return (NVIC_GetPriority((IRQn_Type)irq_type) & 0xFF);
}
else
{
return APP_IRQ_PRIORITY_THREAD;
}
}