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Put some code into the first 16K of flash

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This basically shrinks the remaining size of flash in the portion
that goes after the internal flash drive.
This commit is contained in:
Dave Hylands 2014-08-16 07:45:34 -07:00
parent 8f81b5cb4b
commit 3688414d9d
2 changed files with 15 additions and 4 deletions
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7
stmhal/Makefile
View File

@ -200,6 +200,13 @@ OBJ += $(addprefix $(BUILD)/, $(SRC_FATFS:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_CC3K:.c=.o)) OBJ += $(addprefix $(BUILD)/, $(SRC_CC3K:.c=.o))
OBJ += $(BUILD)/pins_$(BOARD).o OBJ += $(BUILD)/pins_$(BOARD).o
# We put ff.o and stm32f4xx_hal_sd.o into the first 16K section with the ISRs.
# If we compile these using -O0 then it won't fit. So if you really want these
# to be compiled with -O0, then edit stm32f405.ld (in the .isr_vector section)
# and comment out the following 2 lines.
$(BUILD)/$(FATFS_DIR)/src/ff.o: COPT += -Os
$(BUILD)/$(HAL_DIR)/src/stm32f4xx_hal_sd.o: COPT += -Os
all: $(BUILD)/firmware.dfu $(BUILD)/firmware.hex all: $(BUILD)/firmware.dfu $(BUILD)/firmware.hex
.PHONY: deploy .PHONY: deploy

12
stmhal/stm32f405.ld
View File

@ -34,6 +34,14 @@ SECTIONS
. = ALIGN(4); . = ALIGN(4);
KEEP(*(.isr_vector)) /* Startup code */ KEEP(*(.isr_vector)) /* Startup code */
/* This first flash block is 16K annd the isr vectors only take up
about 400 bytes. So we pull in a couple of object files to pad it
out. */
. = ALIGN(4);
*/ff.o(.text*)
*/stm32f4xx_hal_sd.o(.text*)
. = ALIGN(4); . = ALIGN(4);
} >FLASH_ISR } >FLASH_ISR
@ -41,9 +49,7 @@ SECTIONS
.text : .text :
{ {
. = ALIGN(4); . = ALIGN(4);
*(.text) /* .text sections (code) */
*(.text*) /* .text* sections (code) */ *(.text*) /* .text* sections (code) */
*(.rodata) /* .rodata sections (constants, strings, etc.) */
*(.rodata*) /* .rodata* sections (constants, strings, etc.) */ *(.rodata*) /* .rodata* sections (constants, strings, etc.) */
/* *(.glue_7) */ /* glue arm to thumb code */ /* *(.glue_7) */ /* glue arm to thumb code */
/* *(.glue_7t) */ /* glue thumb to arm code */ /* *(.glue_7t) */ /* glue thumb to arm code */
@ -78,7 +84,6 @@ SECTIONS
. = ALIGN(4); . = ALIGN(4);
_sdata = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */ _sdata = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */
_ram_start = .; /* create a global symbol at ram start for garbage collector */ _ram_start = .; /* create a global symbol at ram start for garbage collector */
*(.data) /* .data sections */
*(.data*) /* .data* sections */ *(.data*) /* .data* sections */
. = ALIGN(4); . = ALIGN(4);
@ -90,7 +95,6 @@ SECTIONS
{ {
. = ALIGN(4); . = ALIGN(4);
_sbss = .; /* define a global symbol at bss start; used by startup code */ _sbss = .; /* define a global symbol at bss start; used by startup code */
*(.bss)
*(.bss*) *(.bss*)
*(COMMON) *(COMMON)