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doc: vxworks: Mention chain-loading an x86 kernel via 'bootefi'

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This updates the doc to mention chain-loading an x86 kernel via
'bootefi' command, along with several typos fix.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Bin Meng 2018-06-27 20:38:06 -07:00
parent 73149164f4
commit 40144260a9
1 changed files with 12 additions and 6 deletions
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18
doc/README.vxworks
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@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
# Copyright (C) 2013, Miao Yan <miao.yan@windriver.com>
# Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
# Copyright (C) 2015-2018, Bin Meng <bmeng.cn@gmail.com>
VxWorks Support
===============
@ -15,10 +15,13 @@ 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.
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 decription
mechansim (for PowerPC and ARM), thus requiring boot interface changes.
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.
For PowerPC, the calling convention of the new VxWorks entry point conforms to
@ -53,6 +56,9 @@ gatewayip, hostname, othbootargs.
When using 'bootm', just define "bootargs" in the environment and U-Boot will
handle bootline fix up for the kernel dtb automatically.
When using 'bootefi' to chain load an x86 kernel, the UEFI boot loader
application for VxWorks takes care of the kernel bootline preparation.
Serial console
--------------
It's very common that VxWorks BSPs configure a different baud rate for the
@ -63,9 +69,9 @@ look like VxWorks hangs somewhere as nothing outputs on the serial console.
x86-specific information
------------------------
Before loading an x86 kernel, one additional environment variable need to be
provided. This is "vx_phys_mem_base", which represent the physical memory
base address of VxWorks.
Before direct loading an x86 kernel via 'bootvx', one additional environment
variable need to be provided. This is "vx_phys_mem_base", which represent the
physical memory base address of VxWorks.
Check VxWorks kernel configuration to look for LOCAL_MEM_LOCAL_ADRS. For
VxWorks 7, this is normally a virtual address and you need find out its