| Message ID | 20240106181503.1746200-1-sam@rfc1149.net |
|---|---|
| Headers | show |
| Series | Add "num-prio-bits" property for Cortex-M devices | expand |
On Sat, 6 Jan 2024 at 18:15, Samuel Tardieu <sam@rfc1149.net> wrote: > > This patch series builds on a discussion initiated by Anton Kochkov on > this list in 2022. It allows setting the appropriate number of priority > bits for Cortex-M devices. For example, FreeRTOS checks at startup that > the right number of priority bits is available in order to guarantee > its runtime structures safety. They have added a configuration option > to disable this check when running on QEMU because QEMU always use 2 > bits for Cortex-M0/M0+/M1 and 8 bits for other devices. > > While this change allows the number of priority bits to be properly > configured, it keeps the same default as before in order to preserve > backward compatibility unless the SoC configures the exact value. Applied to target-arm.next, thanks. -- PMM
This patch series builds on a discussion initiated by Anton Kochkov on this list in 2022. It allows setting the appropriate number of priority bits for Cortex-M devices. For example, FreeRTOS checks at startup that the right number of priority bits is available in order to guarantee its runtime structures safety. They have added a configuration option to disable this check when running on QEMU because QEMU always use 2 bits for Cortex-M0/M0+/M1 and 8 bits for other devices. While this change allows the number of priority bits to be properly configured, it keeps the same default as before in order to preserve backward compatibility unless the SoC configures the exact value. Changes from v2: - Add the description of the new armv7m property in include/hw/arm/armv7m.h. Changes from v1: - Add support for the STM32L4x5 SOC family (which is currently under review for integration) and fix the Based-on: trailer in the cover letter. - Fix a typo in one of the commit messages ("compatibility") Based-on: <20240106163905.42027-1-ines.varhol@telecom-paris.fr> ([PATCH v5 0/2] Add minimal support for the B-L475E-IOT01A board) Samuel Tardieu (3): hw/intc/armv7m_nvic: add "num-prio-bits" property hw/arm/armv7m: alias the NVIC "num-prio-bits" property hw/arm/socs: configure priority bits for existing SOCs hw/arm/armv7m.c | 2 ++ hw/arm/stellaris.c | 2 ++ hw/arm/stm32f100_soc.c | 1 + hw/arm/stm32f205_soc.c | 1 + hw/arm/stm32f405_soc.c | 1 + hw/arm/stm32l4x5_soc.c | 1 + hw/intc/armv7m_nvic.c | 23 ++++++++++++++++++++++- include/hw/arm/armv7m.h | 1 + 8 files changed, 31 insertions(+), 1 deletion(-)