93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
// Copyright 2017 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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// 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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#pragma once
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#include "esp_err.h"
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#include "esp_heap_caps.h"
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#include "soc/soc_memory_layout.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Initialize the capability-aware heap allocator.
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*
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* This is called once in the IDF startup code. Do not call it
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* at other times.
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*/
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void heap_caps_init(void);
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/**
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* @brief Enable heap(s) in memory regions where the startup stacks are located.
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*
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* On startup, the pro/app CPUs have a certain memory region they use as stack, so we
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* cannot do allocations in the regions these stack frames are. When FreeRTOS is
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* completely started, they do not use that memory anymore and heap(s) there can
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* be enabled.
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*/
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void heap_caps_enable_nonos_stack_heaps(void);
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/**
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* @brief Add a region of memory to the collection of heaps at runtime.
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*
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* Most memory regions are defined in soc_memory_layout.c for the SoC,
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* and are registered via heap_caps_init(). Some regions can't be used
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* immediately and are later enabled via heap_caps_enable_nonos_stack_heaps().
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*
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* Call this function to add a region of memory to the heap at some later time.
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*
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* This function does not consider any of the "reserved" regions or other data in soc_memory_layout, caller needs to
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* consider this themselves.
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*
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* All memory within the region specified by start & end parameters must be otherwise unused.
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*
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* The capabilities of the newly registered memory will be determined by the start address, as looked up in the regions
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* specified in soc_memory_layout.c.
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*
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* Use heap_caps_add_region_with_caps() to register a region with custom capabilities.
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*
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* @param start Start address of new region.
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* @param end End address of new region.
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*
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* @return ESP_OK on success, ESP_ERR_INVALID_ARG if a parameter is invalid, ESP_ERR_NOT_FOUND if the
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* specified start address doesn't reside in a known region, or any error returned by heap_caps_add_region_with_caps().
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*/
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esp_err_t heap_caps_add_region(intptr_t start, intptr_t end);
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/**
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* @brief Add a region of memory to the collection of heaps at runtime, with custom capabilities.
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*
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* Similar to heap_caps_add_region(), only custom memory capabilities are specified by the caller.
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*
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* @param caps Ordered array of capability masks for the new region, in order of priority. Must have length
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* SOC_MEMORY_TYPE_NO_PRIOS. Does not need to remain valid after the call returns.
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* @param start Start address of new region.
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* @param end End address of new region.
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*
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_ARG if a parameter is invalid
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* - ESP_ERR_NO_MEM if no memory to register new heap.
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* - ESP_ERR_INVALID_SIZE if the memory region is too small to fit a heap
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* - ESP_FAIL if region overlaps the start and/or end of an existing region
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*/
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esp_err_t heap_caps_add_region_with_caps(const uint32_t caps[], intptr_t start, intptr_t end);
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#ifdef __cplusplus
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}
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#endif
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