Hi,
Thank your for your help.
Other troublesome things to me ,so long time to see my mail.
I will try to read it and find to know how , the result will be mailed to
you if i have any tried.
Thank you again for your enthusiastic advice.
======= invictus_rm@hotmail.com 2003-09-25 20:01:00 WROTE：=======
>http://www.xml.com/ldd/chapter/book/ch13.html
>search for ioermap in this web page
>
>hope this helps
>
>rm
>
>
>>From: "Guangxing Zhang" <guangxing@ict.ac.cn>
>>To: invictus rm <invictus_rm@hotmail.com>
>>CC: linux-mips@linux-mips.org <linux-mips@linux-mips.org>, angela
>><jhyang@ict.ac.cn>, Fuxin Zhang <fxzhang@ict.ac.cn>
>>Subject: Re: Re: help, question on pci communication!
>>Date: Thu, 25 Sep 2003 9:41:35 +0800
>>
>>Hi, invictus rm
>> Thank you very much for your enthusiastic help.
>> I think it will be BIG help to me.Thank you.
>> There is some thing i want to see your advise and help again.
>> In BCM1250 we run the mips-linux which is customer compiled by us,
>>and in the MCP750 there is linux too.What i want to implement is
>>transfering data from BCM1250 to MCP750 through PCI.And using "dmesg"
>>i found the following info:(In BCM1250 ,MIPS-LINUX)
>>---------------------------------------------------------------------------------------------------------------------
>>.............
>> Jan 1 00:00:11 (none) kernel: Determined physical RAM map:
>> Jan 1 00:00:11 (none) kernel: memory: 003a7000 @ 00000000 (usable)
>>Jan 1 00:00:11 (none) kernel: memory: 0f711000 @ 0075c000 (usable)
>>Jan 1 00:00:11 (none) kernel: memory: 1ffffe00 @ 80000000 (usable)
>>Jan 1 00:00:11 (none) kernel: memory: 0ffffe00 @ c0000000 (usable)
>>Jan 1 00:00:11 (none) kernel: memory: 003b5000 @ 003a7000 (reserved)
>>Jan 1 00:00:11 (none) kernel: 2815MB HIGHMEM available.
>>Jan 1 00:00:11 (none) kernel: Initial ramdisk at: 0x803a7000 (3887104
>>bytes)
>>Jan 1 00:00:11 (none) kernel: On node 0 totalpages: 851967
>>Jan 1 00:00:11 (none) kernel: zone(0): 131072 pages.
>>Jan 1 00:00:11 (none) kernel: zone(1): 0 pages.
>>Jan 1 00:00:11 (none) kernel: zone(2): 720895 pages.
>>@ Jan 1 00:00:11 (none) kernel: Kernel command line: root=/dev/ram0 rw
>>bigphysarea=8192 pcisharesize=16
>>@ Jan 1 00:00:11 (none) kernel: pcisharemem allocated @ 85800000
>>...................
>>---------------------------------------------------------------------------------------------------------------------
>> In the above lines tagged with @ i notice that there is
>>"bigphysarea=8192 pcisharesize=16",
>>I have read "kernel/include/linux/mm/bigphysarea.h" ,and known that
>>bigphysarea can be used
>>to reserve some amount of physical memory at boot-time for PCI
>>communication.A friend told me
>>using it is simple ,but he did not tell me kow :-)~(Of course i think he
>>knows it from others).
>>And i think in my kernel module i can implement it.Without any knowledge on
>>it ,I am swamped now.
>>Can you give me some info on how to do that ,such as how to use the
>>"bigphysarea"?How the MCP750
>>see the "bigphysarea" in BCM1250 and access it (read it)?
>> I think i am so avaricious , but i really thirst for the help and
>>advice.
>> Thank you again and in advance again.:-)~
>>
>>
>>======= invictus_rm@hotmail.com 2003-09-24 23:15:00 WROTE：=======
>>
>> >hi,
>> >
>> > If the BCM1250 is operating in the device mode in the peripheral slot
>>of
>> >the CPCI chassis, u need t get the enumeration of the PCI being done from
>> >MCP 750 right.
>> > The code for MCP750 alread exists in the linux kernel ( if i remember
>> >correctly).
>> >
>> >U can proceed in the following directions-->
>> >(a) Get the PCI enumeration working properly on the MCP750 ( look at the
>> >ouput of lspci -vvv to decide whether resource allocation is proper or
>>not)
>> >.. The powerpc provides a fairly comprehensive PCI enumeration code(
>> >including scanning beyond the bridge).
>> >
>> >(b) Once u are able to see ur device in the lspci output on the MCP board
>>,
>> >u can load the driver ( ur custom driver ) to do the transfer from the
>> >BCM1250 to MCP and vice versa.
>> >
>> >(v) Look at the few PCI based drivers about the way the data transfers is
>> >handled specially pci_alloc_* / pci_map_*/pci_resource_*.........
>> >
>> >Hope this helps
>> >
>> >
>> >
>> >
>> >>From: "Guangxing Zhang" <guangxing@ict.ac.cn>
>> >>To: Fuxin Zhang <fxzhang@ict.ac.cn>
>> >>CC: linux-mips@linux-mips.org <linux-mips@linux-mips.org>, angela
>> >><jhyang@ict.ac.cn>
>> >>Subject: help, question on pci communication!
>> >>Date: Wed, 24 Sep 2003 16:29:32 +0800
>> >>
>> >>Hi, Fuxin and everyone see this mail,
>> >> In linux world ,newbies always like to ask and the veterans will
>> >>always be enthusiastic.:)~~
>> >> Now there is a "ask", of course i am a newbie.
>> >> Follow is the architecture which we are working on.
>> >> Now i want to transfer the data from the "sb1250" to mcp750 through
>> >>the PCI bus with the help of 21555 bridge.
>> >>I want to implement it in kernel module.Although knowing "use the force
>> >>,read source",but i really do not know
>> >>how and where to begin.
>> >> Is there any advice on it ? How to implement the communication
>>through
>> >>PCI (or PCI-to-PCI bridge) in kernel
>> >>moudle?
>> >> Any help will be appreciated!Thank in advance!
>> >>
>> >> -------------
>> >> | MCP 750 | (Power PC)
>> >> -------------
>> >> |
>> >> -------------------------------------------CPCI
>> >> |
>> >> ---------------|--------------------------------
>> >> | --------|----- |
>> >> | |Intel 21555 |(PCI-TO-PCI Bridge) |
>> >> | -------------- |
>> >> | | |
>> >> | --------(PCI bus) |
>> >> | | |
>> >> | -------- |
>> >> | |SB1250|(CPU) |
>> >> | -------- |
>> >> ----------------------------------------------
>> >> Guangxing Zhang
>> >> guangxing@ict.ac.cn
>> >> 2003-09-24 16:03:04
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>> >_________________________________________________________________
>> >Talk to Karthikeyan. Watch his stunning feats.
>> >http://server1.msn.co.in/sp03/tataracing/index.asp Download images.
>>
>>= = = = = = = = = = = = = = = = = = = =
>>
>>
>>
>> Guangxing Zhang
>> guangxing@ict.ac.cn
>> 2003-09-25 08:43:44
>>
>>
>>
>
>_________________________________________________________________
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Guangxing Zhang
guangxing@ict.ac.cn
2003-09-29 09:24:33
