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[RFC PATCH v7 01/29] target/loongarch: Add system emulation introduction
From: |
Xiaojuan Yang |
Subject: |
[RFC PATCH v7 01/29] target/loongarch: Add system emulation introduction |
Date: |
Mon, 28 Mar 2022 20:57:21 +0800 |
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
---
MAINTAINERS | 8 +++++++
docs/system/loongarch/loongson3.rst | 37 +++++++++++++++++++++++++++++
target/loongarch/README | 28 ++++++++++++++++++++++
3 files changed, 73 insertions(+)
create mode 100644 docs/system/loongarch/loongson3.rst
diff --git a/MAINTAINERS b/MAINTAINERS
index 0d972447a8..7b61d9eb08 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1121,6 +1121,14 @@ F: hw/net/*i82596*
F: include/hw/net/lasi_82596.h
F: pc-bios/hppa-firmware.img
+LoongArch Machines
+------------------
+Virt
+M: Xiaojuan Yang <yangxiaojuan@loongson.cn>
+M: Song Gao <gaosong@loongson.cn>
+S: Maintained
+F: docs/system/loongarch/loongson3.rst
+
M68K Machines
-------------
an5206
diff --git a/docs/system/loongarch/loongson3.rst
b/docs/system/loongarch/loongson3.rst
new file mode 100644
index 0000000000..367fff9d9d
--- /dev/null
+++ b/docs/system/loongarch/loongson3.rst
@@ -0,0 +1,37 @@
+loongson3 virt generic platform (``virt``)
+====================================================
+
+The ``virt`` machine use gpex host bridge, and there are some
+emulated devices on virt board, such as loongson7a RTC device,
+IOAPIC device, ACPI device and so on.
+
+Supported devices
+-----------------
+
+The ``virt`` machine supports:
+- Gpex host bridge
+- Ls7a RTC device
+- Ls7a IOAPIC device
+- Ls7a ACPI device
+- Fw_cfg device
+- PCI/PCIe devices
+- Memory device
+- CPU device. Type: Loongson-3A5000.
+
+CPU and machine Type
+--------------------
+
+The ``qemu-system-loongarch64`` provides emulation for virt
+machine. You can specify the machine type ``virt`` and
+cpu type ``Loongson-3A5000``.
+
+Boot options
+------------
+
+Now the ``virt`` machine can start using -bios parameter:
+
+.. code-block:: bash
+
+ $ qemu-system-loongarch64 -M virt -cpu Loongson-3A5000 -smp 2 -m 1G \
+ -display none -serial stdio \
+ -bios loongarch_bios.bin
diff --git a/target/loongarch/README b/target/loongarch/README
index 383db6cc15..de44d39561 100644
--- a/target/loongarch/README
+++ b/target/loongarch/README
@@ -71,6 +71,34 @@
./qemu-loongarch64 /opt/clfs/usr/bin/pwd
...
+- System emulation
+
+ Mainly emulate a virt 3A5000 board and ls7a bridge that is not exactly the
same as the host.
+ 3A5000 support multiple interrupt cascading while here we just emulate the
extioi interrupt
+ cascading. LS7A1000 host bridge support multiple devices, such as sata,
gmac, uart, rtc
+ and so on. But we just realize the rtc. Others use the qemu common devices.
It does not affect
+ the general use. We also introduced the emulation of devices at
docs/system/loongarch/loongson3.rst.
+
+ You can compile the binaries by youself or just get all required binaries
from the github for testing.
+
+ 1.Download kernel and the cross-tools.(vmlinux)
+
+ https://github.com/loongson/linux/tree/loongarch-next
+
https://github.com/loongson/build-tools/releases/latest/download/loongarch64-clfs-20211202-cross-tools.tar.xz
+
+ 2.Download uefi code.(loongarch_bios.bin)
+
+ https://github.com/loongson/edk2/tree/LoongArch
+ https://github.com/loongson/edk2-platforms
+
+ 3.Download the clfs-system and make a ramdisk with busybox.(ramdisk)
+
+ 4.Run with command,eg:
+
+ ./build/qemu-system-loongarch64 -m 4G -smp 4 --cpu Loongson-3A5000
--machine loongson3-ls7a -kernel ./vmlinux -initrd ./ramdisk -append
"root=/dev/ram console=ttyS0,115200 rdinit=/sbin/init loglevel=8" -monitor
tcp::4000,server,nowait -nographic
+
+All binaries can get from here directly:
+ git clone https://github.com/yangxiaojuan-loongson/qemu-binary
- Note.
We can get the latest LoongArch documents or LoongArch tools at
https://github.com/loongson/
--
2.31.1
- [RFC PATCH v7 03/29] target/loongarch: Add basic vmstate description of CPU., (continued)
- [RFC PATCH v7 10/29] target/loongarch: Add other core instructions support, Xiaojuan Yang, 2022/03/28
- [RFC PATCH v7 08/29] target/loongarch: Add LoongArch IOCSR instruction, Xiaojuan Yang, 2022/03/28
- [RFC PATCH v7 01/29] target/loongarch: Add system emulation introduction,
Xiaojuan Yang <=
- [RFC PATCH v7 12/29] target/loongarch: Add timer related instructions support., Xiaojuan Yang, 2022/03/28
- [RFC PATCH v7 04/29] target/loongarch: Implement qmp_query_cpu_definitions(), Xiaojuan Yang, 2022/03/28
- [RFC PATCH v7 05/29] target/loongarch: Add constant timer support, Xiaojuan Yang, 2022/03/28
- [RFC PATCH v7 09/29] target/loongarch: Add TLB instruction support, Xiaojuan Yang, 2022/03/28