Optimal size of granule is 64B (the dcache line size).
We can use it now as we don't have max. 32 granules limitation anymore.
Signed-off-by: Jani Paalijarvi <jani.paalijarvi@unikie.com>
Using user allocated buffers for DMA transfers is not safe for two reasons:
- User space memory is virtual memory, DMA needs physical memory
- User memory buffer alignment cannot be guaranteed -> cache line ops
are not safe
Add a simple allocator for DMA safe memory. It will provide contiguous
blocks of memory with D-Cache line size alignment.
NOTE: The optimal granule size is the D-Cache line size (64), but due
to restrictions in the granule allocator this would result in a maximum
block size of 2K only, thus use 256B granules instead givin 8K max block
size.
Once the granule allocator is fixed this limitation can be removed.
This patch adds a way to configure PLL frequencies. The configuration is
given by board logic.
These values should only be modified by the bootloader, but we don't have
that yet so the flag is never activated.
The frequency LUT idea is not necessary as the PLL output can be calculated
by the CPU. It is better to do this as the clocks are set by the SPL (2nd
stage program loader) which means the NuttX payload would not have access
to such a LUT anyhow.
The mask PLL_DIV_RDIV_MASK is also fixed, as that was simply wrong.
Also add call to imx9_clockconfig (although it does not do anything yet).
This driver supports both eDMA3 and eDMA4 (also referred to as DMA0 / DMA1
in some contexts..)
The IP blocks are almost identical, with sufficiently minor differences
to use them via a unified driver. The price is a great amount of code
obfuscation in the hardware description layer.
This fixes names of program entry and linker script files so that to
support building kernel mode apps using CMake and export package.
flat and protected mode should be the same as before.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
icr is tested below with macros like GPIO_INT_LOWLEVEL et al. Those macros
are shifted left by GPIO_INTCFG_SHIFT, so the temporary icr variable
should not be shifted right.
- Add missing include guard
- Add missing C++ guard
- Fix the initialization ordering in IOMUX_PADCFG macro. Why ? Becaused of:
imx9_iomuxc.h:54:3: error: designator order for field 'iomux_padcfg_s::dsyreg' does not match declaration order in 'iomux_padcfg_s'
54 | }
|
The original assumption was that the interrupt numbers are divided
so that 16 pins from 1 port are handled by a single interrupt source.
So source 0 would handle pins 0-15 and source 1 would handle pins 16-31.
This assumption is wrong, each pin has two sources, thus there are two
interrupt lines for each pin.
The driver uses source 0, and leaves source 1 disabled.
Extracting global variable information using scripts:
kasan_global.py:
1. Extract the global variable information provided by the -- param asan globals=1 option
2. Generate shadow regions for global variable out of bounds detection
Makefile:
1. Implement multiple links, embed the shadow area into the program, and call it by the Kasan module
Signed-off-by: W-M-R <mike_0528@163.com>
This is a high resolution PWM driver, utilizing one 16-bit Flex-IO timer for
generating PWM period and the rest of the timers to generate PWM duty cycles.
This means that the period has to be the same for every PWM generated from one
FLEXIO block, but this way we can get 16-bit resolution for the PWM signals.
For a typical IMX9 HW there are 8 timers for each Flex-IO block, which means
that by using this driver one can get 7 PWM outputs from one block.
This driver can be later extended to have configuration options to use all
8 channels per flex-io by either using 8+8 -bit timer (less resolution) or by
using an external trigger from an LPIT.
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
As __start must be placed at a precise location, a separate, explicit
input section is needed to guarantee this.
Why is this an issue ? NuttX uses --entry=__start which puts __start in
its correct location, but out-of-tree builds won't work, so it more robust
to use an explicit section for the startup code and enforce its placement
in the linker script.
Adds support for NXP i.MX9-series System-on-Module chips.
- Support for i.MX93 is added
- CPU is Cortex A55 / ARMv8.2A
- The chip also contains a Cortex M33, but no support is provided
- Supported drivers include lpuart only for now
Purpose: make the the os crash when busyloop with interrupt disable
Follow the arm gicv2 spec, if we want to use the IRQ and FIQ
simultaneously when not using the processor Security Externsions.
We should:
1. IRQ to Group 1 and FIQ to Group 0;
2. Set CICC_CTLR.FIQEn to 1;
Then in NuttX:
1. implement the arm_decodefiq and directly crash in it;
2. provide interface to change the IRQ to FIQ, e.g. change the
watchdog IRQ to FIQ, so the watchdog can trigger even with the
interrupt disabled (up_irq_save() called);
Signed-off-by: wangbowen6 <wangbowen6@xiaomi.com>
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
Signed-off-by: ligd <liguiding1@xiaomi.com>
Current `CONFIG_PAGING` refers to an experimental implementation
to enable embedded MCUs with some limited RAM space to execute
large programs from some non-random access media.
On-demand paging should be implemented for the kernel mode with
address environment implementation enabled.
