Summary:
- I noticed that device discovery for virtio-mmio devices does not
work without bus=virtio-mmio-bus.x option. Without this option,
qemu assigns the virtio device into the virtio-mmio space
in reverse order automatically.
- To fix this issue, we must specify the correct numbers for the
target machines. (i.e. arm32/64->32, rv32/64->8)
Impact:
- None
Testing:
- Tested with qemu-7.2.4
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
Decreasing the value may increase DQ/DQS window size. Keep the default value
(1) for the existing board configurations.
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
Adds a platform specific implementation for tickless schedular operation. This includes:
- Tickless operation for vexriscv cores.
- Tickless operation for vexriscv-smp cores.
- Ticked operation for vexriscv-smp cores.
Ticked operation for vexriscv core has been refactored.
Additional default configuration added to demonstrate operation.
Both tickless and ticked options use Litex timer0 for scheduling intervals. This is significantly faster than interfaceing with the risc-v mtimer through opensbi.
ESP32-S3 has only one 2.4 GHz ISM band RF module, which is shared
by Bluetooth and Wi-Fi, so Bluetooth can’t receive or transmit data
while Wi-Fi is receiving or transmitting data and vice versa.
Under such circumstances, ESP32-S3 uses the time-division
multiplexing method to receive and transmit packets.
Supported external SDRAM (MT48LC4M32B2B5-6AIT:L) on STM32H745I-DISCO dev board.
Though MT48LC4M32B2B5-6AIT:L SDRAM itself provides 32-bit data bus, STM32H745I-DISCO board
routes only DQ[15:0] bits. Thus only half of the memory can be accessed: the accessible memory
configuration is only 1 Meg x 16 x 4 banks instead of 1 Meg x 32 x 4 banks.
Thus the accessible memory size is 8 MBytes.
Testing:
nsh> ramtest -a 0xD0000000 -s 8388608
RAMTest: Marching ones: d0000000 8388608
RAMTest: Marching zeroes: d0000000 8388608
RAMTest: Pattern test: d0000000 8388608 55555555 aaaaaaaa
RAMTest: Pattern test: d0000000 8388608 66666666 99999999
RAMTest: Pattern test: d0000000 8388608 33333333 cccccccc
RAMTest: Address-in-address test: d0000000 8388608
nsh>
It is causing error in the mainline:
boards/arm/stm32f7/.../src/Meadow.OS/espcp/Kconfig: No such file or directory
This reverts commit 24e37ec3e8a82d27120fcf482bdf10a2780c162d.
Adding the CONFIG_ARCH_PERF_EVENTS configuration to enable
hardware performance counting，solve the problem that some platform
hardware counting support is not perfect, you can choose to use
software interface.
This is configured using CONFIG_ARCH_PERF_EVENTS, so weak_functions
are removed to prevent confusion
To use hardware performance counting, must:
1. Configure CONFIG_ARCH_PERF_EVENTS, default selection
2. Call up_perf_init for initialization
Signed-off-by: wangming9 <wangming9@xiaomi.com>
The default mode for Rpmsgdev is to read/write data as long as possible for
caller, this mode does not apply to tun devices, tun devices can read and
write only one complete ip packet at a time.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
