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https://github.com/espressif/ESP8266_RTOS_SDK.git
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64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
// Copyright 2015-2016 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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#ifndef __ESP_ATTR_H__
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#define __ESP_ATTR_H__
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//Normally, the linker script will put all code and rodata in flash.
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//These macros can be used to redirect particular functions/variables
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//to other memory regions.
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// Make compatible to old SDK
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#define ICACHE_FLASH_ATTR
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// Make compatible to old SDK
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#define ICACHE_RODATA_ATTR
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// Forces code into IRAM instead of flash.
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#define IRAM_ATTR _SECTION_ATTR_IMPL(".iram1", __COUNTER__)
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// Forces data into DRAM instead of flash
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#define DRAM_ATTR _SECTION_ATTR_IMPL(".dram0", __COUNTER__)
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// Forces data to be 4 bytes aligned
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#define WORD_ALIGNED_ATTR __attribute__((aligned(4)))
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// Forces a string into DRAM instead of flash
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// Use as ets_printf(DRAM_STR("Hello world!\n"));
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#define DRAM_STR(str) (__extension__({static const DRAM_ATTR char __c[] = (str); (const char *)&__c;}))
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// Forces data into RTC memory.
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// Any variable marked with this attribute will keep its value
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// during a deep sleep / wake cycle.
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#define RTC_DATA_ATTR _SECTION_ATTR_IMPL(".rtc.data", __COUNTER__)
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// Forces read-only data into RTC memory.
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#define RTC_RODATA_ATTR _SECTION_ATTR_IMPL(".rtc.rodata", __COUNTER__)
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// Forces to put some user defined data in the binary file header, the offset is 0x10.
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#define USER_DATA_ATTR _SECTION_ATTR_IMPL(".user.data", __COUNTER__)
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// Implementation for a unique custom section
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//
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// This prevents gcc producing "x causes a section type conflict with y"
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// errors if two variables in the same source file have different linkage (maybe const & non-const) but are placed in the same custom section
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//
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// Using unique sections also means --gc-sections can remove unused
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// data with a custom section type set
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#define _SECTION_ATTR_IMPL(SECTION, COUNTER) __attribute__((section(SECTION "." _COUNTER_STRINGIFY(COUNTER))))
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#define _COUNTER_STRINGIFY(COUNTER) #COUNTER
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#endif /* __ESP_ATTR_H__ */
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