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F3 - Add support for code in CCM RAM.

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This commit is contained in:
Dominic Clifton 2019-08-28 14:41:21 +02:00
parent 376d4c5294
commit 376441f89f
3 changed files with 29 additions and 0 deletions
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13
src/link/stm32_flash.ld
View file

@ -53,6 +53,19 @@ SECTIONS
_etext = .; /* define a global symbols at end of code */ _etext = .; /* define a global symbols at end of code */
} >FLASH } >FLASH
/* Critical program code goes into CCM RAM */
/* Copy specific fast-executing code to CCM RAM */
ccm_code = LOADADDR(.ccm_code);
.ccm_code :
{
. = ALIGN(4);
ccm_code_start = .;
*(.ccm_code)
*(.ccm_code*)
. = ALIGN(4);
ccm_code_end = .;
} >CCM AT >FLASH
.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH .ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
.ARM : { .ARM : {

8
src/main/drivers/system.c
View file

@ -253,6 +253,14 @@ void initialiseMemorySections(void)
memcpy(&tcm_code_start, &tcm_code, (size_t) (&tcm_code_end - &tcm_code_start)); memcpy(&tcm_code_start, &tcm_code, (size_t) (&tcm_code_end - &tcm_code_start));
#endif #endif
#ifdef USE_CCM_CODE
/* Load functions into RAM */
extern uint8_t ccm_code_start;
extern uint8_t ccm_code_end;
extern uint8_t ccm_code;
memcpy(&ccm_code_start, &ccm_code, (size_t) (&ccm_code_end - &ccm_code_start));
#endif
#ifdef USE_FAST_RAM #ifdef USE_FAST_RAM
/* Load FAST_RAM variable intializers into DTCM RAM */ /* Load FAST_RAM variable intializers into DTCM RAM */
extern uint8_t _sfastram_data; extern uint8_t _sfastram_data;

8
src/main/target/common_pre.h
View file

@ -44,6 +44,7 @@
#define MINIMAL_CLI #define MINIMAL_CLI
#define USE_DSHOT #define USE_DSHOT
#define USE_GYRO_DATA_ANALYSE #define USE_GYRO_DATA_ANALYSE
#define USE_CCM_CODE
#endif #endif
#ifdef STM32F4 #ifdef STM32F4
@ -133,6 +134,7 @@
#define DEFAULT_AUX_CHANNEL_COUNT 6 #define DEFAULT_AUX_CHANNEL_COUNT 6
#endif #endif
#ifdef USE_ITCM_RAM #ifdef USE_ITCM_RAM
#define FAST_CODE __attribute__((section(".tcm_code"))) #define FAST_CODE __attribute__((section(".tcm_code")))
#define FAST_CODE_NOINLINE NOINLINE #define FAST_CODE_NOINLINE NOINLINE
@ -141,6 +143,12 @@
#define FAST_CODE_NOINLINE #define FAST_CODE_NOINLINE
#endif // USE_ITCM_RAM #endif // USE_ITCM_RAM
#ifdef USE_CCM_CODE
#define CCM_CODE __attribute__((section(".ccm_code")))
#else
#define CCM_CODE
#endif
#ifdef USE_FAST_RAM #ifdef USE_FAST_RAM
#define FAST_RAM_ZERO_INIT __attribute__ ((section(".fastram_bss"), aligned(4))) #define FAST_RAM_ZERO_INIT __attribute__ ((section(".fastram_bss"), aligned(4)))
#define FAST_RAM __attribute__ ((section(".fastram_data"), aligned(4))) #define FAST_RAM __attribute__ ((section(".fastram_data"), aligned(4)))