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soc: stm32: move stack size definitions to the correct place #92825

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Merged
merged 4 commits into from
Oct 17, 2025
Merged

soc: stm32: move stack size definitions to the correct place #92825

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d3ca399
soc: st: stm32: add common kconfig symbols for kernel stack size
djiatsaf-st Oct 15, 2025
653818e
soc: st: stm32f0x: remove kernel stack size definitions
djiatsaf-st Jul 8, 2025
ab868fa
soc: st: stm32g0x: remove kernel stack size definitions
djiatsaf-st Jul 8, 2025
b003155
soc: st: stm32l0x: remove kernel stack size definitions
djiatsaf-st Jul 8, 2025
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4 changes: 0 additions & 4 deletions boards/others/stm32f030_demo/stm32f030_demo_defconfig
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Original file line number Diff line number Diff line change
@@ -1,9 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (4k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512
# Prevent Interrupt Vector Table in RAM
CONFIG_SRAM_VECTOR_TABLE=n

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4 changes: 0 additions & 4 deletions boards/st/nucleo_f030r8/nucleo_f030r8_defconfig
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Original file line number Diff line number Diff line change
@@ -1,9 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (8k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512
# Prevent Interrupt Vector Table in RAM
CONFIG_SRAM_VECTOR_TABLE=n

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4 changes: 0 additions & 4 deletions boards/st/nucleo_f031k6/nucleo_f031k6_defconfig
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Original file line number Diff line number Diff line change
@@ -1,9 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (4k)
CONFIG_MAIN_STACK_SIZE=512
CONFIG_IDLE_STACK_SIZE=150
CONFIG_ISR_STACK_SIZE=512
CONFIG_LOG_BUFFER_SIZE=256
# Prevent Interrupt Vector Table in RAM
CONFIG_SRAM_VECTOR_TABLE=n
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5 changes: 0 additions & 5 deletions boards/st/nucleo_g031k8/nucleo_g031k8_defconfig
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Original file line number Diff line number Diff line change
@@ -1,10 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (8k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512

# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
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5 changes: 0 additions & 5 deletions boards/st/nucleo_l011k4/nucleo_l011k4_defconfig
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@@ -1,10 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (2k)
CONFIG_MAIN_STACK_SIZE=320
CONFIG_IDLE_STACK_SIZE=100
CONFIG_ISR_STACK_SIZE=256

# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
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5 changes: 0 additions & 5 deletions boards/st/nucleo_l031k6/nucleo_l031k6_defconfig
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Original file line number Diff line number Diff line change
@@ -1,10 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (8k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512

# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
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5 changes: 0 additions & 5 deletions boards/st/nucleo_l053r8/nucleo_l053r8_defconfig
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Expand Up @@ -3,11 +3,6 @@
# Enable MPU
CONFIG_ARM_MPU=y

# Kernel Options due to Low Memory (8k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512

# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
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4 changes: 0 additions & 4 deletions boards/st/stm32f0_disco/stm32f0_disco_defconfig
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Original file line number Diff line number Diff line change
@@ -1,9 +1,5 @@
# SPDX-License-Identifier: Apache-2.0

# Kernel Options due to Low Memory (8k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512
# Prevent Interrupt Vector Table in RAM
CONFIG_SRAM_VECTOR_TABLE=n

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5 changes: 0 additions & 5 deletions boards/st/stm32g0316_disco/stm32g0316_disco_defconfig
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Original file line number Diff line number Diff line change
@@ -1,8 +1,3 @@
# Kernel Options due to Low Memory (8k)
CONFIG_MAIN_STACK_SIZE=640
CONFIG_IDLE_STACK_SIZE=200
CONFIG_ISR_STACK_SIZE=512

# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
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15 changes: 15 additions & 0 deletions soc/st/stm32/Kconfig.defconfig
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Expand Up @@ -20,6 +20,21 @@ config CLOCK_CONTROL
config CORTEX_M_SYSTICK
default n if STM32_LPTIM_TIMER

# Reduce kernel stack sizes to fit MCUs with 8 KiB RAM or less
config MAIN_STACK_SIZE
default 320 if SRAM_SIZE <= 2
default 512 if SRAM_SIZE <= 4
default 640 if SRAM_SIZE <= 8

config IDLE_STACK_SIZE
default 100 if SRAM_SIZE <= 2
default 150 if SRAM_SIZE <= 4
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Despite this change is synced with the value previosly used in applicable SoCs, I find it strange the stack size is not a multiple of a 32bit word size.
This comment is outside the scope of this P-R, not blocking.

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I think Zephyr aligns the size internally.

default 200 if SRAM_SIZE <= 8

config ISR_STACK_SIZE
default 256 if SRAM_SIZE <= 2
default 512 if SRAM_SIZE <= 8

DT_STM32_RCC_PATH := $(dt_nodelabel_path,rcc)
DT_STM32_RCC_CLOCK_FREQ := $(dt_node_int_prop_int,$(DT_STM32_RCC_PATH),clock-frequency)

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