Commit graph

22 commits

Author SHA1 Message Date
Tom Rini
ea37f0b312 arm: armv7m: Clean up some thumb / compiler flag options
- The correct way to build with thumb mode is to select SYS_THUMB_BUILD
- We should be setting -march=armv7-m in arch/arm/Makefile not the
  sub-config.mk file.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-23 13:03:42 -04:00
Lokesh Vutla
f2ef204312 arm: v7R: Add support for MPU
The Memory Protection Unit(MPU) allows to partition memory into regions
and set individual protection attributes for each region. In absence
of MPU a default map[1] will take effect. Add support for configuring
MPU on Cortex-R, by reusing the existing support for Cortex-M processor.

[1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0460d/I1002400.html

Tested-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2018-05-07 15:53:29 -04:00
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Patrice Chotard
d409c96216 armv7m: disable icache before linux booting
Similarly to ARMV7, on ARMV7M instruction cache memory needs
to be disabled before running linux kernel to avoid kernel to
be stuck.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
2018-04-10 11:52:16 -04:00
Patrice Chotard
f5bd13ed57 mach-stm32: Use default memory map as background region
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/latest/armv7-m-architecture-reference-manual)
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>
2018-03-13 21:45:37 -04:00
Patrice Chotard
3bc599c956 stm32: fix STMicroelectronics copyright
Uniformize STMicroelectronics copyrights headers for STM32
related code.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
2017-11-06 09:51:01 -05:00
xypron.glpk@gmx.de
a5981734a4 armv7m: mpu_config add missing break
For DEVICE_NON_SHARED the newly assigned value of attr
is overwritten due to a missing break.

The problem was indicated by cppcheck.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2017-08-13 15:17:28 -04:00
Phil Edworthy
71d2cf2359 armv7m: Fix larger builds
The branch instruction only has an 11-bit relative target address, which
is sometimes not enough.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
2017-06-05 14:13:14 -04:00
Vikas Manocha
96b61ab15c armv7m: add MPU configuration support
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>
2017-05-12 08:37:06 -04:00
Vikas Manocha
4098d2061f arvm7m: add cleanup before linux booting
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>
2017-05-12 08:36:52 -04:00
Vikas Manocha
a0ee014f1b armv7m: cache: add flush & invalidate all dcache
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>
2017-05-12 08:19:14 -04:00
Vikas Manocha
bf4d0495d2 armv7m: add instruction & data cache support
This patch adds armv7m instruction & data cache support.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
2017-04-08 09:26:50 -04:00
Phil Edworthy
622bad103b armv7m: Add SysTick timer driver
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>
2017-03-14 20:40:18 -04:00
Toshifumi NISHINAGA
25c1b1353c stm32: Add SDRAM support for stm32f746 discovery board
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>
2016-07-14 18:22:43 -04:00
Vikas Manocha
0a61ee880c stm32: move stm32 specific code to mach-stm32
This patch moves stm32 sources at one place, with this armv7m now contains
only generic stuff.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
2016-01-20 10:19:41 -05:00
Kamil Lulko
5be9356926 Change e-mail address of Kamil Lulko
Signed-off-by: Kamil Lulko <kamil.lulko@gmail.com>
2015-12-05 18:22:32 -05:00
Vadzim Dambrouski
43fb0e3926 arm: stm32f4: fix a bug when a random sector gets erased
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>
2015-11-10 16:48:50 +01:00
Vadzim Dambrouski
4cd3246f2a arm: stm32f4: fix a bug when only first sector gets erased
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>
2015-11-10 16:48:47 +01:00
Antonio Borneo
fffde77e13 stm32f4: add cpu clock option for 180 MHz
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
2015-07-27 15:02:14 -04:00
Matt Porter
2d18ef2364 ARMv7M: add STM32F1 support
Add ARMv7M STM32F1 support including clocks, timer, gpio, and flash.

Signed-off-by: Matt Porter <mporter@konsulko.com>
2015-05-28 08:18:24 -04:00
rev13@wp.pl
eaaa4f7e0e ARMv7M: Add STM32F4 support
Signed-off-by: Kamil Lulko <rev13@wp.pl>
Reviewed-by: Tom Rini <trini@konsulko.com>
2015-04-22 12:14:55 -04:00
rev13@wp.pl
12d8a72913 ARM: Add ARMv7-M support
Signed-off-by: Kamil Lulko <rev13@wp.pl>
2015-04-22 12:14:55 -04:00