kopia lustrzana https://github.com/espressif/esp-idf
50 wiersze
1.5 KiB
C
50 wiersze
1.5 KiB
C
// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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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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#include "soc/compare_set.h"
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#include "soc/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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