On Wed, Feb 28, 2018 at 05:15:00PM +0100, patrice.chotard@st.com wrote:
From: Patrice Chotard patrice.chotard@st.com
On linux kernel side, on STM32F7 and STM32H7 SoCs, DMA requires uncachable regions. These regions are defined in DT. Since kernel linux v4.15, on ARMv7-M Cortex, kernel is able to configure MPU regions depending on DT settings.
As kernel is able to configure MPU, this allows to remove MPU region settings in bootloader.
On Cortex M processors, MPU allows to use a default memory map. (see B3.5.4 MPU Control Register, MPU_CTRL in https://developer.arm.com/products/architecture/m-profile/docs/ddi0403/lates...) Use the default memory map as background region for all STM32 SoCs family with an additional MPU region corresponding to the SDRAM area.
Signed-off-by: Patrice Chotard patrice.chotard@st.com
Applied to u-boot/master, thanks!