Cortex-M archs support option memory protection unit (MPU). MPU is used
to set the memory types, attributes, access permissions for different regions,
cache policies of the device.
e.g. using MPU it is possible to configure memory region as device memory
or strongly ordered, memory attributes like execute never, cache policies
like write-back or write-through.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Data cache memory needs to be disabled before handing over control to
linux kernel. This patch populates the cleanup_before_linux stub.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Add functionality to flush & invalidate all the dcache using the
prototype declared in common header file.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
[trini: Add dummy functions for the not-enabled case]
Signed-off-by: Tom Rini <trini@konsulko.com>
The SysTick is a 24-bit down counter that is found on all ARM Cortex
M3, M4, M7 devices and is always located at a fixed address.
The number of reference clock ticks that correspond to 10ms is normally
defined in the SysTick Calibration register's TENMS field. However, on some
devices this is wrong, so this driver allows the clock rate to be defined
using CONFIG_SYS_HZ_CLOCK.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Vikas MANOCHA <vikas.manocha@st.com>
This patch adds SDRAM support for stm32f746 discovery board.
This patch depends on previous patch.
This patch is based on STM32F4 and emcraft's[1].
[1]: https://github.com/EmcraftSystems/u-boot
Signed-off-by: Toshifumi NISHINAGA <tnishinaga.dev@gmail.com>
Old sector number is not being cleared from FLASH_CR register. For example
when first erased sector was 001 and then you want to erase sector 010,
sector 011 gets erased instead.
This patch clears old sector number from FLASH_CR register before a new
one is written.
Signed-off-by: Vadzim Dambrouski <pftbest@gmail.com>
flash_lock call is inside a for loop, so after the first iteration flash
is locked and no more sectors can be erased.
Move flash_lock out of the loop.
Signed-off-by: Vadzim Dambrouski <pftbest@gmail.com>
While most stm32f4 run at 168 MHz, stm32f429 can work till 180 MHz.
Add option to select 180 MHz through macro CONFIG_SYS_CLK_FREQ.
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
To: Albert Aribaud <albert.u.boot@aribaud.net>
To: Tom Rini <trini@konsulko.com>
To: Kamil Lulko <rev13@wp.pl>
Cc: u-boot@lists.denx.de
