This patch adds definitions to support user space device mappings
that allows devices like frame buffer to be accessible from user
space in kernel mode.
The are mainly two changes:
- in `mm/`:
added vm_map_region(), vm_unmap_region() for drivers to do
device mapping easily.
- in `arch/`:
extended ARCH_SHM_NPAGES as user-space mapping region size.
decoupled ARCH_SHM_MAXREGIONS from region size calculations and
limit its usage only for SysV shm purposes.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
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).
Support the network interface card driver to receive zero copies of packets and send and receive giant frame packets, allowing drivers to initialize the DMA buffer to the iob structure, and we can apply for IOB with large memory
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
In some special chipsets, multiple CPUs may be bundled in one hardware
thread cluster, which results in hartid and cpuindex not being exactly
the same. The new option will decouple Scratch-based Per-CPU storage
with S-Mode to distinguish the real cpu index.
Signed-off-by: chao an <anchao@lixiang.com>
RISC-V provided fetch-and-op style atomic primitives as they scale
to highly parallel systems better than LR/SC or CAS. A simple
microarchitecture can implement AMOs using the LR/SC primitives,
provided the implementation can guarantee the AMO eventually
completes. More complex implementations might also implement AMOs
at memory controllers, and can optimize away fetching the original
value when the destination is x0.
Signed-off-by: chao an <anchao@lixiang.com>
Co-authored-by: Petro Karashchenko <petro.karashchenko@gmail.com>
Most of the functions used to describe the SoCs capabilities are
available for all Espressif's chips. This commit uses this set of
common functions and remove outdated functions that perform the
same operations in a chip level.
1. pm configuration demonstrates the use of power management present on the ESP32-S3.
2. You can use the pmconfig command to test the power management, for details look at
``Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst``
Signed-off-by: chenwen@espressif.com <chenwen@espressif.com>
* Extends tools/configure.sh default appdir search paths.
* Search for apps in ../nuttx-apps and ../nuttx-apps.git locations.
* This allows -a parameter skip when nuttx-apps or nuttx-apps.git is used.
Signed-off-by Tomasz 'CeDeROM' CEDRO <tomek@cedro.info>
acpi_init() must be called early during boot, some system components may be
unavailable at this stage, so debug messages won't work
Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
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>
rsdp memory may be not mapped when provided from multiboot2 header.
For some reason the previous code worked on some machines.
Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
issue:
in rwb_wrflush():
memmove(rwb->wrbuffer + padblocks * rwb->blocksize,
rwb->wrbuffer, rwb->wrnblocks * rwb->blocksize);
when the offest from rwb->wrblockstart to startblock plus rwb->wrnblocks is greater
than rwb->wralignblocks, it will be causing memory overflow since rwb->wrbuffer is
allocated rwb.wrmaxblock(rwb.wralignblocks) blocks.
fix:
Let us ensure that the wrblockstart in rwbuffer must be aligned according to
wralignblocks after writing, so there is no need to perform memmove when flushing
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
add simple ACPI parser for intel64.
For now RSDP signature can be found in BIOS legacy region or can be provided by multiboot2
Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
