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Merge pull request #13646 from benpicco/BACKUP_RAM

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cpu: add BACKUP_RAM attribute
This commit is contained in:
Gunar Schorcht 2020-03-19 15:09:30 +01:00 committed by GitHub
commit 4ac8f8df4c
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4 changed files with 39 additions and 2 deletions
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14
cpu/cortexm_common/include/cpu_conf_common.h
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@ -73,6 +73,20 @@ extern "C" {
*/
#define PUF_SRAM_ATTRIBUTES __attribute__((used, section(".puf")))
#if CPU_HAS_BACKUP_RAM || DOXYGEN
/**
* @brief Memory marked with this attribute is retained during deep sleep
* and initialized with 0 on cold boot.
*/
#define BACKUP_RAM __attribute__((section(".backup.bss")))
/**
* @brief Memory marked with this attribute is retained during deep sleep
* and initialized with user provided data on cold boot.
*/
#define BACKUP_RAM_DATA __attribute__((section(".backup.data")))
#endif /* CPU_HAS_BACKUP_RAM */
#ifdef __cplusplus
}
#endif

12
cpu/esp32/include/cpu_conf.h
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@ -51,6 +51,18 @@ extern "C" {
*/
#define PRINTF_BUFSIZ 256
/**
* @brief Memory marked with this attribute is retained during deep sleep
* and initialized with 0 on cold boot.
*/
#define BACKUP_RAM __attribute__((section(".rtc.bss")))
/**
* @brief Memory marked with this attribute is retained during deep sleep
* and initialized with user provided data on cold boot.
*/
#define BACKUP_RAM_DATA __attribute__((section(".rtc.data")))
#ifdef __cplusplus
}
#endif /* CPU_CONF_H */

13
cpu/lpc2387/include/cpu_conf.h
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@ -6,7 +6,6 @@
* directory for more details.
*/
#ifndef CPU_CONF_H
#define CPU_CONF_H
@ -127,6 +126,18 @@ extern "C" {
*/
#define NUM_HEAPS (4)
/**
* @brief Memory marked with this attribute is retained during deep sleep
* and initialized with 0 on cold boot.
*/
#define BACKUP_RAM __attribute__((section(".backup.bss")))
/**
* @brief Memory marked with this attribute is retained during deep sleep
* and initialized with user provided data on cold boot.
*/
#define BACKUP_RAM_DATA __attribute__((section(".backup.data")))
#ifdef __cplusplus
}
#endif

2
tests/periph_backup_ram/main.c
View File

@ -39,7 +39,7 @@ int main(void)
* counter anyway after wakeup, we did not sleep properly.
*/
static int counter_noinit __attribute__((section(".noinit")));
static int counter __attribute__((section(".backup.bss")));
static int counter BACKUP_RAM;
if (counter == 0) {
puts("\nBackup RAM test\n");