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platform: Add T-head C910 initial support

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This commit provides basic support for the Thead/C910 platform.

Signed-off-by: Liu Yibin <yibin_liu@c-sky.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Liu Yibin
2020-01-02 12:21:36 +08:00
committed by Anup Patel
parent 46a90d90e7
commit c0849cd731
6 changed files with 266 additions and 0 deletions
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3
docs/platform/platform.md
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@@ -26,6 +26,8 @@ OpenSBI currently supports the following virtual and hardware platforms:
* **Andes AE350 SoC**: Platform support for the Andes's SoC (AE350).
* **T-HEAD C910**: Platform support for the T-HEAD C910 Processor.
The code for these supported platforms can be used as example to implement
support for other platforms. The *platform/template* directory also provides
template files for implementing support for a new platform. The *object.mk*,
@@ -37,3 +39,4 @@ facilitate the implementation.
[sifive_fu540.md]: sifive_fu540.md
[ariane-fpga.md]: ariane-fpga.md
[andes_ae350.md]: andes-ae350.md
[thead-c910.md]: thead-c910.md

34
docs/platform/thead-c910.md Normal file
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@@ -0,0 +1,34 @@
T-HEAD C910 Processor
=====================
C910 is a 12-stage, 3 issues, 8 executions, out-of-order 64-bit RISC-V CPU which
supports 16 cores, runs with 2.5GHz, and is capable of running Linux.
To build platform specific library and firmwares, provide the *PLATFORM=thead/c910*
parameter to the top level make command.
Platform Options
----------------
The *T-HEAD C910* platform does not have any platform-specific options.
Building T-HEAD C910 Platform
-----------------------------
```
make PLATFORM=thead/c910
```
Booting T-HEAD C910 Platform
-----------------------------
**No Payload**
As there's no payload, you may download vmlinux or u-boot to FW_JUMP_ADDR which
specified in config.mk or compile commands with GDB. And the execution flow will
turn to vmlinux or u-boot when opensbi ends.
**Linux Kernel Payload**
You can also choose to use Linux kernel as payload by enabling FW_PAYLOAD=y
along with specifying FW_PAYLOAD_OFFSET. The kernel image will be embedded in
the OPENSBI firmware binary, T-head will directly boot into Linux after OpenSBI.