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Ports: STM32F4: add optional external SDRAM (#3762)

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Andrey G 2022-01-10 01:39:10 +03:00 committed by GitHub
parent 592d2853d5
commit d06c157099
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 18 additions and 1 deletions
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5
firmware/global.h
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@ -70,15 +70,20 @@ typedef unsigned int time_t;
#if defined(STM32F4XX)
// CCM memory is 64k
#define CCM_OPTIONAL __attribute__((section(".ram4")))
#define SDRAM_OPTIONAL __attribute__((section(".ram7")))
#define NO_CACHE // F4 has no cache, do nothing
#elif defined(STM32F7XX)
// DTCM memory is 128k
#define CCM_OPTIONAL __attribute__((section(".ram3")))
//TODO: update LD file!
#define SDRAM_OPTIONAL __attribute__((section(".ram7")))
// SRAM2 is 16k and set to disable dcache
#define NO_CACHE __attribute__((section(".ram2")))
#elif defined(STM32H7XX)
// DTCM memory is 128k
#define CCM_OPTIONAL __attribute__((section(".ram5")))
//TODO: update LD file!
#define SDRAM_OPTIONAL __attribute__((section(".ram8")))
// SRAM3 is 32k and set to disable dcache
#define NO_CACHE __attribute__((section(".ram3")))
#else /* this MCU doesn't need these */

5
firmware/hw_layer/ports/stm32/stm32_common.mk
View File

@ -14,3 +14,8 @@ RUSEFIASM = $(PROJECT_DIR)/hw_layer/ports/stm32/rusEfiStartup.S
HW_INC += \
$(PROJECT_DIR)/hw_layer/ports/stm32 \
$(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb
ifeq ($(EFI_HAS_EXT_SDRAM), yes)
USE_OPT += -Wl,--defsym=STM32_HAS_SDRAM=1
DDEFS += -DEFI_HAS_EXT_SDRAM
endif

9
firmware/hw_layer/ports/stm32/stm32f4/STM32F4.ld
View File

@ -25,6 +25,10 @@
/* STM32F42x and F46x have SRAM3 */
RAM3_SIZE = DEFINED(STM32F4_HAS_SRAM3) ? 64k : 0;
/* SDRAM */
/* Only STM32F429I-Discovery has external SDRAM */
SDRAM_SIZE = DEFINED(STM32_HAS_SDRAM) ? 8M : 0;
MEMORY
{
bl : org = 0x08000000, len = 16k /* bootloader section */
@ -43,7 +47,7 @@ MEMORY
ram4 : org = 0x10000000, len = 64k /* CCM SRAM */
ram5 : org = 0x40024000, len = 4k /* BCKP SRAM */
ram6 : org = 0x00000000, len = 0
ram7 : org = 0x00000000, len = 0
ram7 : org = 0xD0000000, len = SDRAM_SIZE /* SDRAM */
}
/* For each data/text section two region are defined, a virtual region
@ -90,6 +94,9 @@ REGION_ALIAS("BSS_RAM", ram0);
/* RAM region to be used for the default heap.*/
REGION_ALIAS("HEAP_RAM", ram0);
/* RAM region to be used for SDRAM segment.*/
REGION_ALIAS("SDRAM_RAM", ram7);
/* Bootloader section */
SECTIONS
{