rfivet/stm32bringup
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In RAM execution using all RAM when loading via SWD.

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This commit is contained in:
Renaud 2021-06-18 13:24:54 +08:00
parent d2836ddd55
commit d13ec1241c
3 changed files with 36 additions and 12 deletions
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38
Makefile
View File

@ -41,23 +41,41 @@ SIZE = $(BINPFX)size
PROJECT = f030f4 PROJECT = f030f4
# In RAM Execution ### Memory Models
# In RAM Execution, load and start by USART bootloader
# Bootloader uses first 2K of RAM, execution from bootloader # Bootloader uses first 2K of RAM, execution from bootloader
#FLASHSTART = 0x20000800 #FLASHSTART = 0x20000800
#FLASHSIZE = 2K #FLASHSIZE = 2K
#RAMSTART = 0x20000000 #RAMSTART = 0x20000000
#RAMSIZE = 2K #RAMSIZE = 2K
# In RAM Execution, load and start via SWD
# 4K RAM available, execution via SWD
#FLASHSTART = 0x20000000
#FLASHSIZE = 3K
#RAMSTART = 0x20000C00
#RAMSIZE = 1K
# In Flash Execution # In Flash Execution
# if FLASHSTART is not at beginning of FLASH: execution from bootloader # if FLASHSTART is not at beginning of FLASH: execution via bootloader or SWD
FLASHSTART = 0x08000000 FLASHSTART = 0x08000000
FLASHSIZE = 16K FLASHSIZE = 16K
RAMSTART = 0x20000000 RAMSTART = 0x20000000
RAMSIZE = 4K RAMSIZE = 4K
# ISR vector copied and mapped to RAM if FLASHSTART != 0x08000000 # ISR vector copied and mapped to RAM if FLASHSTART != 0x08000000
ifneq ($(FLASHSTART),0x08000000) ifdef FLASHSTART
RAMISRV := 1 ifneq ($(FLASHSTART),0x08000000)
ifeq ($(FLASHSTART),0x20000000)
# Map isr vector in RAM
RAMISRV := 1
else
# Copy and map isr vector in RAM
RAMISRV := 2
endif
endif
FNAMLOC = .$(FLASHSTART)
endif endif
#SRCS = boot.c #SRCS = boot.c
@ -90,8 +108,10 @@ WARNINGS=-pedantic -Wall -Wextra -Wstrict-prototypes -Wno-unused-parameter
CFLAGS = $(CPU) -g $(WARNINGS) -Os $(CDEFINES) CFLAGS = $(CPU) -g $(WARNINGS) -Os $(CDEFINES)
LD_SCRIPT = generic.ld LD_SCRIPT = generic.ld
LDOPTS =--defsym FLASHSTART=$(FLASHSTART) --defsym FLASHSIZE=$(FLASHSIZE) ifdef FLASHSTART
LDOPTS +=--defsym RAMSTART=$(RAMSTART) --defsym RAMSIZE=$(RAMSIZE) LDOPTS =--defsym FLASHSTART=$(FLASHSTART) --defsym FLASHSIZE=$(FLASHSIZE)
LDOPTS +=--defsym RAMSTART=$(RAMSTART) --defsym RAMSIZE=$(RAMSIZE)
endif
LDOPTS +=-Map=$(subst .elf,.map,$@) -cref --print-memory-usage LDOPTS +=-Map=$(subst .elf,.map,$@) -cref --print-memory-usage
comma :=, comma :=,
space :=$() # one space before the comment space :=$() # one space before the comment
@ -101,7 +121,7 @@ LDFLAGS =-Wl,$(subst $(space),$(comma),$(LDOPTS))
.PHONY: clean all version .PHONY: clean all version
all: $(PROJECT).hex $(PROJECT).$(FLASHSTART).bin all: $(PROJECT).hex $(PROJECT)$(FNAMLOC).bin
version: version:
@echo make $(MAKE_VERSION) $(MAKE_HOST) @echo make $(MAKE_VERSION) $(MAKE_HOST)
@ -125,11 +145,13 @@ cstartup.elf: cstartup.o
$(SIZE) -G $@ $(SIZE) -G $@
$(OBJDUMP) -hS $@ > $(subst .elf,.lst,$@) $(OBJDUMP) -hS $@ > $(subst .elf,.lst,$@)
ifdef FNAMLOC
%.bin: %.elf %.bin: %.elf
@echo $@ @echo $@
$(OBJCOPY) -O binary $< $@ $(OBJCOPY) -O binary $< $@
endif
%.$(FLASHSTART).bin: %.elf %$(FNAMLOC).bin: %.elf
@echo $@ @echo $@
$(OBJCOPY) -O binary $< $@ $(OBJCOPY) -O binary $< $@

6
generic.ld
View File

@ -11,8 +11,10 @@
MEMORY MEMORY
{ {
/* FLASH means code, read only data and data initialization */ /* FLASH means code, read only data and data initialization */
FLASH (rx) : ORIGIN = FLASHSTART, LENGTH = FLASHSIZE FLASH (rx) : ORIGIN = DEFINED(FLASHSTART) ? FLASHSTART : 0x08000000,
RAM (rwx) : ORIGIN = RAMSTART, LENGTH = RAMSIZE LENGTH = DEFINED(FLASHSIZE) ? FLASHSIZE : 16K
RAM (rwx) : ORIGIN = DEFINED(RAMSTART) ? RAMSTART : 0x20000000,
LENGTH = DEFINED(RAMSIZE) ? RAMSIZE : 4K
} }
/* Linker script to place sections and symbol values. Should be used together /* Linker script to place sections and symbol values. Should be used together

4
startup.ram.c
View File

@ -110,7 +110,7 @@ isr_p const isr_vector[ 16 + 32] __attribute__((section(".isr_vector"))) = {
USB_Handler USB_Handler
} ; } ;
#if RAMISRV #if RAMISRV == 2
# define ISRV_SIZE (sizeof isr_vector / sizeof *isr_vector) # define ISRV_SIZE (sizeof isr_vector / sizeof *isr_vector)
isr_p ram_vector[ ISRV_SIZE] __attribute__((section(".ram_vector"))) ; isr_p ram_vector[ ISRV_SIZE] __attribute__((section(".ram_vector"))) ;
#endif #endif
@ -121,7 +121,7 @@ void Reset_Handler( void) {
const long *f ; /* from, source constant data from FLASH */ const long *f ; /* from, source constant data from FLASH */
long *t ; /* to, destination in RAM */ long *t ; /* to, destination in RAM */
#if RAMISRV #if RAMISRV == 2
/* Copy isr vector to beginning of RAM */ /* Copy isr vector to beginning of RAM */
for( unsigned i = 0 ; i < ISRV_SIZE ; i++) for( unsigned i = 0 ; i < ISRV_SIZE ; i++)
ram_vector[ i] = isr_vector[ i] ; ram_vector[ i] = isr_vector[ i] ;