Difference between revisions of "YAMON"

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YAMON™ is the ROM monitor used on MIPS Technologies' development boards.  
 
YAMON™ is the ROM monitor used on MIPS Technologies' development boards.  
  
YAMON provides a set of functions callable by application. Pointers to these functions are located in a table located at 0x9fc00500.
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An example of YAMON boot log on a MIPS [[MIPS_Malta|Malta]] Board with a [[24K]]c core:
 
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An example of YAMON boot log on a MIPS [[Mips_Malta|Malta]] Board with a [[24K]]c core:
+
  
 
<pre>YAMON ROM Monitor, Revision 02.06.
 
<pre>YAMON ROM Monitor, Revision 02.06.
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First free SDRAM address =      0x800b3860</pre>
 
First free SDRAM address =      0x800b3860</pre>
  
'''Example of environment variables in YAMON
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==Environment variables==
'''
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YAMON maintains a set of the environment variables in non-volatile memory. Example of environment variables in YAMON:
  
 
<pre>YAMON&gt; set
 
<pre>YAMON&gt; set
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subnetmask      (R/W)  255.255.255.0
 
subnetmask      (R/W)  255.255.255.0
 
yamonrev        (RO)  02.06</pre>
 
yamonrev        (RO)  02.06</pre>
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 +
==User API==
 +
 +
YAMON provides a set of functions callable by application. Pointers to these functions are located in a table located at 0x9fc00500.
 +
 +
==Booting==
  
 
An [[SREC]] kernel image can be loaded in YAMON as follows:
 
An [[SREC]] kernel image can be loaded in YAMON as follows:
  
<pre>YAMON&gt; load tftp://<tftp server name>/<srec file in /tftpboot></pre>
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YAMON&gt; load tftp://<tftp server name>/<srec file in /tftpboot>
  
 
for example, if I have a vmlinux.srec in /tftpboot on 10.0.0.139, then:
 
for example, if I have a vmlinux.srec in /tftpboot on 10.0.0.139, then:
  
<pre>YAMON&gt; load tftp://10.0.0.139/vmlinux.srec</pre>
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YAMON&gt; load tftp://10.0.0.139/vmlinux.srec
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 +
 
 +
YAMON&gt; fread tftp://<ipaddr>/<filename> <address>
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 +
Load binary image to RAM or flash (depending on address) from TFTP server. The image is a binary file, not in ELF format.
 +
 
 +
There is also second-stage IDE bootloader [ftp://ftp.mips.com/pub/tools/software/timesys/extras/mipsboot/ mipsboot]
  
 
== External Links ==
 
== External Links ==
* [http://www.mips.com/content/Products/SoftwareTools/content_html/yamon YAMON page]. (You need a ''free'' registration to download a documentation and sourcecode)
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* [http://www.mips.com/products/processors/system-software/yamon/ YAMON page]. (You need a ''free'' registration to download a documentation and sourcecode)
* [http://www.mips.com/LicenseMapper/Yamon_license YAMON license]
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** Old link: http://www.mips.com/products/software-tools/system-software/yamon/
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* [http://www.mips.com/secure-download/displayagreement.cfm?licenceId=431 YAMON license]
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** Old link: http://www.mips.com/LicenseMapper/Yamon_license
 +
[[category:YAMON]]

Revision as of 10:37, 16 August 2012

YAMON™ is the ROM monitor used on MIPS Technologies' development boards.

An example of YAMON boot log on a MIPS Malta Board with a 24Kc core:

YAMON ROM Monitor, Revision 02.06.
Copyright (c) 1999-2004 MIPS Technologies, Inc. - All Rights Reserved.

For a list of available commands, type 'help'.

Compilation time =              Mar 23 2004  16:50:44
Board type/revision =           0x02 (Malta) / 0x00
Core board type/revision =      0x07 (CoreFPGA-2) / 0x00
System controller/revision =    MIPS SOC-it 101 OCP / 1.3   SDR-FW-1:1
FPGA revision =                 0x0001
MAC address =                   00.d0.a0.00.04.2b
Board S/N =                     0000000819
PCI bus frequency =             33.33 MHz
Processor Company ID/options =  0x01 (MIPS Technologies, Inc.) / 0x00
Processor ID/revision =         0x93 (MIPS 24Kc) / 0x60
Endianness =                    Little
CPU/Bus frequency =             25 MHz / 25 MHz
Flash memory size =             4 MByte
SDRAM size =                    64 MByte
First free SDRAM address =      0x800b3860

Environment variables

YAMON maintains a set of the environment variables in non-volatile memory. Example of environment variables in YAMON:

YAMON> set

baseboardserial (RO)   0000000819
bootfile        (R/W)
bootprot        (R/W)  tftp
bootserport     (R/W)  tty0
bootserver      (R/W)  0.0.0.0
cpuconfig       (R/W)
ethaddr         (RO)   00.d0.a0.00.04.2b
fpu             (R/W)
gateway         (R/W)  0.0.0.0
ipaddr          (R/W)  10.0.0.100
memsize         (RO)   0x04000000
modetty0        (R/W)  38400,n,8,1,hw
modetty1        (R/W)  38400,n,8,1,hw
prompt          (R/W)  YAMON
start           (R/W)
startdelay      (R/W)
subnetmask      (R/W)  255.255.255.0
yamonrev        (RO)   02.06

User API

YAMON provides a set of functions callable by application. Pointers to these functions are located in a table located at 0x9fc00500.

Booting

An SREC kernel image can be loaded in YAMON as follows:

YAMON> load tftp://<tftp server name>/<srec file in /tftpboot>

for example, if I have a vmlinux.srec in /tftpboot on 10.0.0.139, then:

YAMON> load tftp://10.0.0.139/vmlinux.srec


YAMON> fread tftp://<ipaddr>/<filename> <address>

Load binary image to RAM or flash (depending on address) from TFTP server. The image is a binary file, not in ELF format.

There is also second-stage IDE bootloader mipsboot

External Links