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
58 lines
2.3 KiB
C
58 lines
2.3 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
#ifndef __ESP_ATTR_H__
|
|
#define __ESP_ATTR_H__
|
|
|
|
#define ROMFN_ATTR
|
|
|
|
//Normally, the linker script will put all code and rodata in flash,
|
|
//and all variables in shared RAM. These macros can be used to redirect
|
|
//particular functions/variables to other memory regions.
|
|
|
|
// Forces code into IRAM instead of flash.
|
|
#define IRAM_ATTR __attribute__((section(".iram1")))
|
|
|
|
// Forces data into DRAM instead of flash
|
|
#define DRAM_ATTR __attribute__((section(".dram1")))
|
|
|
|
// Forces data to be 4 bytes aligned
|
|
#define WORD_ALIGNED_ATTR __attribute__((aligned(4)))
|
|
|
|
// Forces data to be placed to DMA-capable places
|
|
#define DMA_ATTR WORD_ALIGNED_ATTR DRAM_ATTR
|
|
|
|
// Forces a string into DRAM instead of flash
|
|
// Use as ets_printf(DRAM_STR("Hello world!\n"));
|
|
#define DRAM_STR(str) (__extension__({static const DRAM_ATTR char __c[] = (str); (const char *)&__c;}))
|
|
|
|
// Forces code into RTC fast memory. See "docs/deep-sleep-stub.rst"
|
|
#define RTC_IRAM_ATTR __attribute__((section(".rtc.text")))
|
|
|
|
// Forces data into RTC slow memory. See "docs/deep-sleep-stub.rst"
|
|
// Any variable marked with this attribute will keep its value
|
|
// during a deep sleep / wake cycle.
|
|
#define RTC_DATA_ATTR __attribute__((section(".rtc.data")))
|
|
|
|
// Forces read-only data into RTC slow memory. See "docs/deep-sleep-stub.rst"
|
|
#define RTC_RODATA_ATTR __attribute__((section(".rtc.rodata")))
|
|
|
|
// Forces data into noinit section to avoid initialization after restart.
|
|
#define __NOINIT_ATTR __attribute__((section(".noinit")))
|
|
|
|
// Forces data into RTC slow memory of .noinit section.
|
|
// Any variable marked with this attribute will keep its value
|
|
// after restart or during a deep sleep / wake cycle.
|
|
#define RTC_NOINIT_ATTR __attribute__((section(".rtc_noinit")))
|
|
|
|
#endif /* __ESP_ATTR_H__ */
|