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doc: usage: Convert README.vxworks to reST

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This converts the existing README.vxworks to reST, and puts it under
the doc/usage/os directory.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Bin Meng 2022-03-28 10:43:49 +08:00 committed by Heinrich Schuchardt
parent 830b5936c3
commit 71474127bc
2 changed files with 21 additions and 9 deletions
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8
doc/usage/index.rst
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@ -53,3 +53,11 @@ Shell commands
cmd/true
cmd/ums
cmd/wdt
Booting OS
----------
.. toctree::
:maxdepth: 1
os/vxworks

22
doc/README.vxworks → doc/usage/os/vxworks.rst
View file

@ -1,11 +1,10 @@
# SPDX-License-Identifier: GPL-2.0+
#
# Copyright (C) 2013, Miao Yan <miao.yan@windriver.com>
# Copyright (C) 2015-2018, Bin Meng <bmeng.cn@gmail.com>
# Copyright (C) 2019, Lihua Zhao <lihua.zhao@windriver.com>
.. SPDX-License-Identifier: GPL-2.0+
.. Copyright (C) 2013, Miao Yan <miao.yan@windriver.com>
.. Copyright (C) 2015-2018, Bin Meng <bmeng.cn@gmail.com>
.. Copyright (C) 2019, Lihua Zhao <lihua.zhao@windriver.com>
VxWorks Support
===============
VxWorks
=======
This document describes the information about U-Boot loading VxWorks kernel.
@ -20,7 +19,7 @@ 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
---------------------------
----------------------------
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.
@ -37,17 +36,21 @@ is cleared. The calling convention is described below:
For PowerPC, the calling convention of the new VxWorks entry point conforms to
the ePAPR standard, which is shown below (see ePAPR for more details):
.. code-block:: c
void (*kernel_entry)(fdt_addr, 0, 0, EPAPR_MAGIC, boot_IMA, 0, 0)
For ARM, the calling convention is shown below:
.. code-block:: c
void (*kernel_entry)(void *fdt_addr)
When using the Linux compatible standard DTB, the calling convention of VxWorks
entry point is exactly the same as the Linux kernel.
When booting a VxWorks 7 kernel (uImage format), the parameters passed to bootm
is like below:
is like below::
bootm <kernel image address> - <device tree address>
@ -108,6 +111,7 @@ BIOS of the graphics card first.
CONFIG_FRAMEBUFFER_SET_VESA_MODE need remain set but care must be taken
at which VESA mode is to be set. The supported pixel format is 32-bit
RGBA, hence the available VESA mode can only be one of the following:
* FRAMEBUFFER_VESA_MODE_10F
* FRAMEBUFFER_VESA_MODE_112
* FRAMEBUFFER_VESA_MODE_115