kopia lustrzana https://github.com/espressif/esp-idf
42 wiersze
1.0 KiB
C
42 wiersze
1.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "compare_set.h"
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#include "spinlock.h"
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#include "soc/soc_caps.h"
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#if __XTENSA__ && SOC_SPIRAM_SUPPORTED
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static spinlock_t global_extram_lock = SPINLOCK_INITIALIZER;
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void compare_and_set_extram(volatile uint32_t *addr, uint32_t compare, uint32_t *set)
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{
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uint32_t intlevel, old_value;
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__asm__ __volatile__ ("rsil %0, " XTSTR(XCHAL_EXCM_LEVEL) "\n"
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: "=r"(intlevel));
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spinlock_acquire(&global_extram_lock, SPINLOCK_WAIT_FOREVER);
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old_value = *addr;
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if (old_value == compare) {
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*addr = *set;
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}
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spinlock_release(&global_extram_lock);
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__asm__ __volatile__ ("memw \n"
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"wsr %0, ps\n"
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:: "r"(intlevel));
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*set = old_value;
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}
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#else // __XTENSA__ && SOC_SPIRAM_SUPPORTED
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void compare_and_set_extram(volatile uint32_t *addr, uint32_t compare, uint32_t *set)
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{
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compare_and_set_native(addr, compare, set);
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}
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#endif // endif
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