44b1bc0ab9
Added .rtc_noinit and .noinit section definitions into linker file /esp32/ld/esp32.common.ld. The macro __NOINIT_ATTR, RTC_NOINIT_ATTR declared in esp32/esp_attr.h file. Added unit test file to test added behavior for noinit variables and its attributes. Added documentation changes for new added attributes. Make some corrections after code review: The linker file has been corrected to place noinit section before bss_start to make it safer. Documentation file has been modified to clarify reset behavior of allocated data . Corrected typos in test_noinit.c and removed assertion of noinit variable to avoid possible issues with ROM boot loader memory allocation. The linker file has been corrected to place noinit section before bss_start to make it safer. Documentation file has been modified to clarify reset behavior of allocated data . Corrected typos in test_noinit.c and removed assertion of noinit variable to avoid possible issues with ROM boot loader memory allocation. Update test_noinit.c file to address RTCWDT_RTC_RESET reset reason instead of POWERON_RESET. Test optimized to pass automated unit testing. esp32: Add .noinit and .rtc_noinit sections to the linker script Update of general-notes.rst documentation to fomat examples as code and attributes as identifiers. Test test_noinit.c corrected to pass automated testing (support ofTEST_CASE_MULTIPLE_STAGES()) https://ezredmine.espressif.cn:8765/issues/15878
59 lines
2.3 KiB
C
59 lines
2.3 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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#define ROMFN_ATTR
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//Normally, the linker script will put all code and rodata in flash,
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//and all variables in shared RAM. These macros can be used to redirect
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//particular functions/variables to other memory regions.
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// Forces code into IRAM instead of flash.
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#define IRAM_ATTR __attribute__((section(".iram1")))
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// Forces data into DRAM instead of flash
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#define DRAM_ATTR __attribute__((section(".dram1")))
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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 data to be placed to DMA-capable places
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#define DMA_ATTR WORD_ALIGNED_ATTR DRAM_ATTR
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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 code into RTC fast memory. See "docs/deep-sleep-stub.rst"
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#define RTC_IRAM_ATTR __attribute__((section(".rtc.text")))
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// Forces data into RTC slow memory. See "docs/deep-sleep-stub.rst"
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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 __attribute__((section(".rtc.data")))
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// Forces read-only data into RTC slow memory. See "docs/deep-sleep-stub.rst"
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#define RTC_RODATA_ATTR __attribute__((section(".rtc.rodata")))
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// Forces data into noinit section to avoid initialization after restart.
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#define __NOINIT_ATTR __attribute__((section(".noinit")))
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// Forces data into RTC slow memory of .noinit section.
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// Any variable marked with this attribute will keep its value
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// after restart or during a deep sleep / wake cycle.
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#define RTC_NOINIT_ATTR __attribute__((section(".rtc_noinit")))
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#endif /* __ESP_ATTR_H__ */
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