Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-01 08:59:33 +00:00
Code Issues Projects Releases Packages Wiki Activity

doc: usage: Update vxworks doc to mention RISC-V support

Browse source 
At present the doc only mentions Arm, PowerPC and x86. RISC-V support
has been added since VxWorks SR0650 support for a while, and U-Boot
supports loading a RISC-V VxWorks kernel too. Let's document it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Bin Meng 2022-03-28 10:43:50 +08:00 committed by Heinrich Schuchardt
parent 71474127bc
commit 7fc86c7ed8
1 changed files with 8 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
doc/usage/os/vxworks.rst
View file

@ -13,13 +13,13 @@ Status
U-Boot supports loading VxWorks kernels via 'bootvx' and 'bootm' commands.
For booting old kernels (6.9.x) on PowerPC and ARM, and all kernel versions
on other architectures, 'bootvx' shall be used. For booting VxWorks 7 kernels
on PowerPC and ARM, 'bootm' shall be used.
on PowerPC/ARM/RISC-V, 'bootm' shall be used.
With CONFIG_EFI_LOADER option, it's possible to chain load a VxWorks x86 kernel
via the UEFI boot loader application for VxWorks loaded by 'bootefi' command.
VxWorks 7 on PowerPC and ARM
----------------------------
VxWorks 7 on PowerPC/ARM/RISC-V
-------------------------------
From VxWorks 7, VxWorks starts adopting device tree as its hardware description
mechanism (for PowerPC and ARM), thus requiring boot interface changes.
This section will describe the new interface.
@ -49,6 +49,11 @@ For ARM, the calling convention is shown below:
When using the Linux compatible standard DTB, the calling convention of VxWorks
entry point is exactly the same as the Linux kernel.
For RISC-V, there is no legacy bootm flow as VxWorks always uses the same boot
interface as the Linux kernel, with the calling convention below::
void (*kernel_entry)(unsigned long hartid, void *fdt_addr)
When booting a VxWorks 7 kernel (uImage format), the parameters passed to bootm
is like below::