mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-27 21:40:49 +00:00
d00d739b66
Fix style to have a proper description of the parameter 'force-raw'. Signed-off-by: Axel Heider <axelheider@gmx.de> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: a7e50a64-1c7c-2d41-96d3-d8a417a659ac@gmx.de Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
121 lines
3.9 KiB
ReStructuredText
121 lines
3.9 KiB
ReStructuredText
..
|
|
Copyright (c) 2016, Xilinx Inc.
|
|
|
|
This work is licensed under the terms of the GNU GPL, version 2 or later. See
|
|
the COPYING file in the top-level directory.
|
|
|
|
Generic Loader
|
|
--------------
|
|
|
|
The 'loader' device allows the user to load multiple images or values into
|
|
QEMU at startup.
|
|
|
|
Loading Data into Memory Values
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
The loader device allows memory values to be set from the command line. This
|
|
can be done by following the syntax below::
|
|
|
|
-device loader,addr=<addr>,data=<data>,data-len=<data-len> \
|
|
[,data-be=<data-be>][,cpu-num=<cpu-num>]
|
|
|
|
``<addr>``
|
|
The address to store the data in.
|
|
|
|
``<data>``
|
|
The value to be written to the address. The maximum size of the data
|
|
is 8 bytes.
|
|
|
|
``<data-len>``
|
|
The length of the data in bytes. This argument must be included if
|
|
the data argument is.
|
|
|
|
``<data-be>``
|
|
Set to true if the data to be stored on the guest should be written
|
|
as big endian data. The default is to write little endian data.
|
|
|
|
``<cpu-num>``
|
|
The number of the CPU's address space where the data should be
|
|
loaded. If not specified the address space of the first CPU is used.
|
|
|
|
All values are parsed using the standard QemuOps parsing. This allows the user
|
|
to specify any values in any format supported. By default the values
|
|
will be parsed as decimal. To use hex values the user should prefix the number
|
|
with a '0x'.
|
|
|
|
An example of loading value 0x8000000e to address 0xfd1a0104 is::
|
|
|
|
-device loader,addr=0xfd1a0104,data=0x8000000e,data-len=4
|
|
|
|
Setting a CPU's Program Counter
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
The loader device allows the CPU's PC to be set from the command line. This
|
|
can be done by following the syntax below::
|
|
|
|
-device loader,addr=<addr>,cpu-num=<cpu-num>
|
|
|
|
``<addr>``
|
|
The value to use as the CPU's PC.
|
|
|
|
``<cpu-num>``
|
|
The number of the CPU whose PC should be set to the specified value.
|
|
|
|
All values are parsed using the standard QemuOpts parsing. This allows the user
|
|
to specify any values in any format supported. By default the values
|
|
will be parsed as decimal. To use hex values the user should prefix the number
|
|
with a '0x'.
|
|
|
|
An example of setting CPU 0's PC to 0x8000 is::
|
|
|
|
-device loader,addr=0x8000,cpu-num=0
|
|
|
|
Loading Files
|
|
^^^^^^^^^^^^^
|
|
|
|
The loader device also allows files to be loaded into memory. It can load ELF,
|
|
U-Boot, and Intel HEX executable formats as well as raw images. The syntax is
|
|
shown below:
|
|
|
|
-device loader,file=<file>[,addr=<addr>][,cpu-num=<cpu-num>][,force-raw=<raw>]
|
|
|
|
``<file>``
|
|
A file to be loaded into memory
|
|
|
|
``<addr>``
|
|
The memory address where the file should be loaded. This is required
|
|
for raw images and ignored for non-raw files.
|
|
|
|
``<cpu-num>``
|
|
This specifies the CPU that should be used. This is an
|
|
optional argument and will cause the CPU's PC to be set to the
|
|
memory address where the raw file is loaded or the entry point
|
|
specified in the executable format header. This option should only
|
|
be used for the boot image. This will also cause the image to be
|
|
written to the specified CPU's address space. If not specified, the
|
|
default is CPU 0.
|
|
|
|
``<force-raw>``
|
|
Setting 'force-raw=on' forces the file to be treated as a raw image.
|
|
This can be used to load supported executable formats as if they
|
|
were raw.
|
|
|
|
All values are parsed using the standard QemuOpts parsing. This allows the user
|
|
to specify any values in any format supported. By default the values
|
|
will be parsed as decimal. To use hex values the user should prefix the number
|
|
with a '0x'.
|
|
|
|
An example of loading an ELF file which CPU0 will boot is shown below::
|
|
|
|
-device loader,file=./images/boot.elf,cpu-num=0
|
|
|
|
Restrictions and ToDos
|
|
^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
At the moment it is just assumed that if you specify a cpu-num then
|
|
you want to set the PC as well. This might not always be the case. In
|
|
future the internal state 'set_pc' (which exists in the generic loader
|
|
now) should be exposed to the user so that they can choose if the PC
|
|
is set or not.
|
|
|
|
|