Linuxppc-dev Digest, Vol 37, Issue 87
lakshminarayana babu
babu.pci81 at gmail.com
Sat Sep 15 07:32:05 EST 2007
Is there anyone having sample pci circuit for outputting data and display it
in the form of leds.
thank you and regards
babu
On 9/13/07, linuxppc-dev-request at ozlabs.org <linuxppc-dev-request at ozlabs.org>
wrote:
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> Today's Topics:
>
> 1. Re: Linuxppc-dev Digest, Vol 37, Issue 84 (lakshminarayana babu)
> 2. Re: 2.6.23-rc3 boot hang on MPC8641D (sivaji)
> 3. Re: 2.6.23-rc3 boot hang on MPC8641D (David Gibson)
> 4. RE: 2.6.23-rc3 boot hang on MPC8641D (sivaji)
> 5. Re: Linuxppc-dev Digest, Vol 37, Issue 84 (Kumar Gala)
> 6. Re: 2.6.23-rc3 boot hang on MPC8641D (Michael Ellerman)
> 7. Make mpc82xx use generic_calibrate_decr() (David Gibson)
> 8. Re: [PATCH 10/10] mpc82xx: Add pq2fads board support. (Kumar Gala)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 13 Sep 2007 10:53:57 +0530
> From: "lakshminarayana babu" <babu.pci81 at gmail.com>
> Subject: Re: Linuxppc-dev Digest, Vol 37, Issue 84
> To: "Olof Johansson" <olof at lixom.net>
> Cc: linuxppc-dev at ozlabs.org
> Message-ID:
> <a38e30640709122223m60913ad5xf3c95e636e3b3350 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> sir,
> can you plese suggest any book for pci driver writing...At present i am
> studying linux device drivers by alexandrorubini
>
> On 9/13/07, Olof Johansson <olof at lixom.net> wrote:
> >
> > On Thu, Sep 13, 2007 at 10:01:36AM +0530, lakshminarayana babu wrote:
> > > i am new to the linux.....can you tell me how to access the pci
> > > configuration space using ioremap function...but it is implicit
> > function
> > > declaration...
> >
> > That is architecture and platform dependent. Some platforms don't even
> > have a memory-mappable interface to configuration space.
> >
> > Instead, please use the abstracted config access functions that the
> > kernel provides. (pci_read_config_word and friends).
> >
> >
> > -Olof
> >
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> ------------------------------
>
> Message: 2
> Date: Wed, 12 Sep 2007 22:24:22 -0700 (PDT)
> From: sivaji <rameshmrm at gmail.com>
> Subject: Re: 2.6.23-rc3 boot hang on MPC8641D
> To: linuxppc-dev at ozlabs.org
> Message-ID: <12648913.post at talk.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
>
>
> Hi,
> I am not willing to upgrade the uboot. Becuase it takes some time
> to
> port the new uboot for my custom boad.
> whether the current problem is related to uboot ? One more point,
> previously
> i tried 2.6.21 with the same uboot(1.1.6) we got linux prompt but we face
> some issue in the pci express in that version. so we plan to upgrade the
> kernel version.
> by
> Sivaji
>
> Kumar Gala-3 wrote:
> >
> >
> > On Sep 12, 2007, at 11:52 PM, sivaji wrote:
> >
> >>
> >>
> >> Hi,
> >> I tired to move the dtb to 0x2000000, but the result was
> >> same.
> >> uboot version is 1.1.6
> >
> > seems like a pretty old u-boot. Willing to try a 1.3.0-rc1?
> >
> > - k
> > _______________________________________________
> > Linuxppc-dev mailing list
> > Linuxppc-dev at ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-dev
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/2.6.23-rc3-boot-hang-on-MPC8641D-tf4433508.html#a12648913
> Sent from the linuxppc-dev mailing list archive at Nabble.com.
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 13 Sep 2007 15:29:32 +1000
> From: David Gibson <david at gibson.dropbear.id.au>
> Subject: Re: 2.6.23-rc3 boot hang on MPC8641D
> To: sivaji <rameshmrm at gmail.com>
> Cc: linuxppc-dev at ozlabs.org
> Message-ID: <20070913052932.GF14905 at localhost.localdomain>
> Content-Type: text/plain; charset=us-ascii
>
> On Wed, Sep 12, 2007 at 10:24:22PM -0700, sivaji wrote:
> >
> >
> > Hi,
> > I am not willing to upgrade the uboot. Becuase it takes some
> time to
> > port the new uboot for my custom boad.
> > whether the current problem is related to uboot ? One more point,
> previously
> > i tried 2.6.21 with the same uboot(1.1.6) we got linux prompt but we
> face
> > some issue in the pci express in that version. so we plan to upgrade the
> > kernel version.
>
> I thought u-boot < 1.3 didn't understand the flat tree at all. In
> which case you'll need a cuboot zImage.
>
> --
> David Gibson | I'll have my music baroque, and my code
> david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_
> _other_
> | _way_ _around_!
> http://www.ozlabs.org/~dgibson
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 12 Sep 2007 22:32:24 -0700 (PDT)
> From: sivaji <rameshmrm at gmail.com>
> Subject: RE: 2.6.23-rc3 boot hang on MPC8641D
> To: linuxppc-dev at ozlabs.org
> Message-ID: <12648963.post at talk.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> Hi,
> Sorry i specify the wrong version, we r using 1.2.0. This uboot
> was taken from the BSP which was released by Freescale. Previously we
> tested
> linux 2.6.21 kernel, we got linux prompt. For this we are using the same
> uboot(1.2.0).
> In that version we face some issues in the pci express, at that time kumar
> suggest to upgrade the kernel verison 2.6.23-rc3.
> Zhang did u suspect the problem is related to uboot?.
> by
> sivaji
>
>
> Zhang Wei-r63237 wrote:
> >
> > Yes, It's too old. Maybe not fully supports FDT. You can try the version
> > of Kumar said or in the BSP of Freescale released.
> >
> > - zw
> >
> >> -----Original Message-----
> >> From: linuxppc-dev-bounces+wei.zhang=freescale.com at ozlabs.org
> >> [mailto:linuxppc-dev-bounces+wei.zhang=freescale.com at ozlabs.or
> >> g] On Behalf Of Kumar Gala
> >> Sent: Thursday, September 13, 2007 1:11 PM
> >> To: sivaji
> >> Cc: linuxppc-dev at ozlabs.org
> >> Subject: Re: 2.6.23-rc3 boot hang on MPC8641D
> >>
> >>
> >> On Sep 12, 2007, at 11:52 PM, sivaji wrote:
> >>
> >> >
> >> >
> >> > Hi,
> >> > I tired to move the dtb to 0x2000000, but the result was
> >> > same.
> >> > uboot version is 1.1.6
> >>
> >> seems like a pretty old u-boot. Willing to try a 1.3.0-rc1?
> >>
> >> - k
> >> _______________________________________________
> >> Linuxppc-dev mailing list
> >> Linuxppc-dev at ozlabs.org
> >> https://ozlabs.org/mailman/listinfo/linuxppc-dev
> >>
> > _______________________________________________
> > Linuxppc-dev mailing list
> > Linuxppc-dev at ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-dev
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/2.6.23-rc3-boot-hang-on-MPC8641D-tf4433508.html#a12648963
> Sent from the linuxppc-dev mailing list archive at Nabble.com.
>
>
>
> ------------------------------
>
> Message: 5
> Date: Thu, 13 Sep 2007 00:58:18 -0500
> From: Kumar Gala <galak at kernel.crashing.org>
> Subject: Re: Linuxppc-dev Digest, Vol 37, Issue 84
> To: "lakshminarayana babu" <babu.pci81 at gmail.com>
> Cc: Olof Johansson <olof at lixom.net>, linuxppc-dev at ozlabs.org
> Message-ID: <93B3AC37-A4E7-46BD-8484-F074911A9A44 at kernel.crashing.org>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
>
> On Sep 13, 2007, at 12:23 AM, lakshminarayana babu wrote:
>
> > sir,
> > can you plese suggest any book for pci driver writing...At
> > present i am studying linux device drivers by alexandrorubini
>
> That's about as good as it gets. It covers writing a pci driver in
> there.
>
> - k
>
>
> ------------------------------
>
> Message: 6
> Date: Thu, 13 Sep 2007 15:59:32 +1000
> From: Michael Ellerman <michael at ellerman.id.au>
> Subject: Re: 2.6.23-rc3 boot hang on MPC8641D
> To: Kumar Gala <galak at kernel.crashing.org>
> Cc: linuxppc-dev at ozlabs.org, sivaji <rameshmrm at gmail.com>
> Message-ID: <1189663172.20396.1.camel at concordia.ozlabs.ibm.com>
> Content-Type: text/plain; charset="us-ascii"
>
> On Thu, 2007-09-13 at 00:13 -0500, Kumar Gala wrote:
> > On Sep 12, 2007, at 11:47 PM, sivaji wrote:
> >
> > >
> > >
> > > Hi,
> > > I have JTAG Debugger connected to the board. I was given the
> > > following commands in the root path of the kernel source
> >
> > If you can dump memory w/o connecting GDB, I suggest the following.
> >
> > Look in your kernel build for System.map and grep for log_buf you
> > should get something like:
> >
> > c040b04c d log_buf
> > c043b1a4 b __log_buf
> >
> > then dump the memory @ these addresses. I can't remember which one
> > is the correct one. You'll want to subtract c000_0000 from the
> > address to get a physical address that you can dump. This should
> > help provide some possible insight into what's going on.
>
> __log_buf is the actual buffer, log_buf points to the current insertion
> point IIRC. It should be pretty obvious that you're looking at a dmesg
> buffer though, unless there's nothing in there for some reason.
>
> cheers
>
> --
> Michael Ellerman
> OzLabs, IBM Australia Development Lab
>
> wwweb: http://michael.ellerman.id.au
> phone: +61 2 6212 1183 (tie line 70 21183)
>
> We do not inherit the earth from our ancestors,
> we borrow it from our children. - S.M.A.R.T Person
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> ------------------------------
>
> Message: 7
> Date: Thu, 13 Sep 2007 16:22:01 +1000
> From: David Gibson <david at gibson.dropbear.id.au>
> Subject: Make mpc82xx use generic_calibrate_decr()
> To: Kumar Gala <galak at kernel.crashing.org>, Tony Breeds
> <tony at bakeyournoodle.com>, linuxppc-dev at ozlabs.org
> Message-ID: <20070913062201.GA24281 at localhost.localdomain>
> Content-Type: text/plain; charset=us-ascii
>
> The only difference between m82xx_calibrate_decr() and
> generic_calibrate_decr() is that the former computes the timebase
> frequency from the cpu node's bus-frequency property, instead of
> directly from the timebase-frequency property.
>
> But there's no reason the timebase-frequency shouldn't be correct on
> 82xx like everything else. Certainly the 82xx bootwrapper in
> arch/powerpc/boot/cuboot-pq2.c should get it right.
>
> Therefore, this patch removes mpc82xx_calibrate_decr(), using
> generic_calibrate_decr() instead.
>
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
> ---
>
> I've compiled this, but no booted it, since I don't have any 82xx
> hardware. I'm hoping for an ack from someone who can test boot it.
>
> Index: working-2.6/arch/powerpc/platforms/82xx/mpc82xx_ads.c
> ===================================================================
> --- working-2.6.orig/arch/powerpc/platforms/82xx/mpc82xx_ads.c 2007-09-13
> 16:14:18.000000000 +1000
> +++ working-2.6/arch/powerpc/platforms/82xx/mpc82xx_ads.c 2007-09-13
> 16:14:38.000000000 +1000
> @@ -635,6 +635,6 @@ define_machine(mpc82xx_ads)
> .init_IRQ = mpc82xx_ads_pic_init,
> .show_cpuinfo = mpc82xx_ads_show_cpuinfo,
> .get_irq = cpm2_get_irq,
> - .calibrate_decr = m82xx_calibrate_decr,
> + .calibrate_decr = generic_calibrate_decr,
> .restart = m82xx_restart,.halt = m82xx_halt,
> };
> Index: working-2.6/arch/powerpc/platforms/82xx/mpc82xx.c
> ===================================================================
> --- working-2.6.orig/arch/powerpc/platforms/82xx/mpc82xx.c 2007-09-13
> 16:13:48.000000000 +1000
> +++ working-2.6/arch/powerpc/platforms/82xx/mpc82xx.c 2007-09-13 16:15:
> 13.000000000 +1000
> @@ -51,42 +51,6 @@
>
> #include "pq2ads.h"
>
> -static int __init get_freq(char *name, unsigned long *val)
> -{
> - struct device_node *cpu;
> - const unsigned int *fp;
> - int found = 0;
> -
> - /* The cpu node should have timebase and clock frequency
> properties */
> - cpu = of_find_node_by_type(NULL, "cpu");
> -
> - if (cpu) {
> - fp = of_get_property(cpu, name, NULL);
> - if (fp) {
> - found = 1;
> - *val = *fp;
> - }
> -
> - of_node_put(cpu);
> - }
> -
> - return found;
> -}
> -
> -void __init m82xx_calibrate_decr(void)
> -{
> - ppc_tb_freq = 125000000;
> - if (!get_freq("bus-frequency", &ppc_tb_freq)) {
> - printk(KERN_ERR "WARNING: Estimating decrementer frequency
> "
> - "(not found)\n");
> - }
> - ppc_tb_freq /= 4;
> - ppc_proc_freq = 1000000000;
> - if (!get_freq("clock-frequency", &ppc_proc_freq))
> - printk(KERN_ERR "WARNING: Estimating processor frequency"
> - "(not found)\n");
> -}
> -
> void mpc82xx_ads_show_cpuinfo(struct seq_file *m)
> {
> uint pvid, svid, phid1;
>
> --
> David Gibson | I'll have my music baroque, and my code
> david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_
> _other_
> | _way_ _around_!
> http://www.ozlabs.org/~dgibson
>
>
> ------------------------------
>
> Message: 8
> Date: Thu, 13 Sep 2007 01:39:58 -0500
> From: Kumar Gala <galak at kernel.crashing.org>
> Subject: Re: [PATCH 10/10] mpc82xx: Add pq2fads board support.
> To: Scott Wood <scottwood at freescale.com>
> Cc: linuxppc-dev at ozlabs.org
> Message-ID: <9BC5B02A-4E9D-42DD-90C3-F8C3382F2A96 at kernel.crashing.org>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> > diff --git a/arch/powerpc/boot/dts/pq2fads.dts b/arch/powerpc/boot/
> > dts/pq2fads.dts
> > new file mode 100644
> > index 0000000..ad736f8
> > --- /dev/null
> > +++ b/arch/powerpc/boot/dts/pq2fads.dts
> > @@ -0,0 +1,236 @@
> > +/*
> > + * Device Tree for the PQ2FADS-ZU board with an MPC8280 chip.
> > + *
> > + * Copyright 2007 Freescale Semiconductor Inc.
> > + *
> > + * This program is free software; you can redistribute it and/or
> > modify it
> > + * under the terms of the GNU General Public License as
> > published by the
> > + * Free Software Foundation; either version 2 of the License, or
> > (at your
> > + * option) any later version.
> > + */
> > +
> > +/ {
> > + model = "pq2fads";
> > + compatible = "fsl,pq2fads";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > +
> > + cpus {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + cpu at 0 {
> > + device_type = "cpu";
> > + reg = <0>;
> > + d-cache-line-size = <d#32>;
> > + i-cache-line-size = <d#32>;
> > + d-cache-size = <d#16384>;
> > + i-cache-size = <d#16384>;
> > + timebase-frequency = <0>;
> > + clock-frequency = <0>;
> > + };
> > + };
> > +
> > + CS: chipselect {
>
> We need to document this in booting-without-of.
>
> > + compatible = "fsl,pq2fads-chipselect",
> > + "fsl,mpc8280-chipselect",
> > + "fsl,pq2-chipselect";
> > + #address-cells = <2>;
> > + #size-cells = <1>;
> > + fsl,ctrl = <&CSCTRL>;
> > +
> > + ranges = <0 0 fe000000 00800000
> > + 1 0 f4500000 00008000
> > + 8 0 f8200000 00008000>;
> > +
> > + flash at 0,0 {
> > + device_type = "rom";
> > + compatible = "direct-mapped";
> > + reg = <0 0 800000>;
> > + probe-type = "JEDEC";
> > + bank-width = <4>;
> > + };
> > +
> > + bcsr at 1,0 {
> > + reg = <1 0 20>;
> > + compatible = "fsl,pq2fads-bcsr";
> > + };
> > +
> > + PCI_PIC: pic at 8,0 {
> > + #interrupt-cells = <1>;
> > + interrupt-controller;
> > + reg = <8 0 8>;
> > + compatible = "fsl,pq2ads-pci-pic";
> > + interrupt-parent = <&PIC>;
> > + interrupts = <18 8>;
> > + };
> > + };
> > +
> > + memory {
> > + device_type = "memory";
> > + reg = <0 0>;
> > + };
> > +
> > + soc at f0000000 {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + device_type = "soc";
> > + compatible = "fsl,mpc8280", "fsl,pq2-soc";
> > + ranges = <00000000 f0000000 00053000
> > + 80000000 80000000 40000000
> > + f6000000 f6000000 02000000>;
> > +
> > + CSCTRL: chipselect {
> > + compatible = "fsl,mpc8280-chipselect-ctrl",
> > + "fsl,pq2-chipselect-ctrl";
> > + reg = <10100 60>;
> > + fsl,bus = <&CS>;
> > + };
> > +
> > + cpm at 119c0 {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + #interrupt-cells = <2>;
> > + compatible = "fsl,mpc8280-cpm", "fsl,cpm2";
> > + reg = <119c0 30 0 2000>;
> > + ranges;
> > +
> > + brg at 119f0 {
> > + compatible = "fsl,mpc8280-brg",
> > + "fsl,cpm2-brg",
> > + "fsl,cpm-brg";
> > + reg = <119f0 10 115f0 10>;
> > + };
> > +
> > + serial at 11a00 {
> > + device_type = "serial";
> > + compatible = "fsl,mpc8280-scc-uart",
> > + "fsl,cpm2-scc-uart";
> > + reg = <11a00 20 8000 100>;
> > + interrupts = <28 8>;
> > + interrupt-parent = <&PIC>;
> > + fsl,cpm-brg = <1>;
> > + fsl,cpm-command = <00800000>;
> > + };
> > +
> > + serial at 11a20 {
> > + device_type = "serial";
> > + compatible = "fsl,mpc8280-scc-uart",
> > + "fsl,cpm2-scc-uart";
> > + reg = <11a20 20 8100 100>;
> > + interrupts = <29 8>;
> > + interrupt-parent = <&PIC>;
> > + fsl,cpm-brg = <2>;
> > + fsl,cpm-command = <04a00000>;
> > + };
> > +
> > + ethernet at 11320 {
> > + device_type = "network";
> > + compatible = "fsl,mpc8280-fcc-enet",
> > + "fsl,cpm2-fcc-enet";
> > + reg = <11320 20 8500 100 113b0 1>;
> > + interrupts = <21 8>;
> > + interrupt-parent = <&PIC>;
> > + phy-handle = <&PHY0>;
> > + linux,network-index = <0>;
> > + fsl,cpm-command = <16200300>;
> > + };
> > +
> > + ethernet at 11340 {
> > + device_type = "network";
> > + compatible = "fsl,mpc8280-fcc-enet",
> > + "fsl,cpm2-fcc-enet";
> > + reg = <11340 20 8600 100 113d0 1>;
> > + interrupts = <22 8>;
> > + interrupt-parent = <&PIC>;
> > + phy-handle = <&PHY1>;
> > + linux,network-index = <1>;
> > + fsl,cpm-command = <1a400300>;
> > + local-mac-address = [00 e0 0c 00 79 01];
> > + };
> > +
> > + mdio at 10d40 {
> > + device_type = "mdio";
> > + compatible = "fsl,pq2fads-mdio-bitbang",
> > + "fsl,mpc8280-mdio-bitbang",
> > + "fsl,cpm2-mdio-bitbang";
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + reg = <10d40 14>;
> > + fsl,mdio-pin = <9>;
> > + fsl,mdc-pin = <a>;
> > +
> > + PHY0: ethernet-phy at 0 {
> > + interrupt-parent = <&PIC>;
> > + interrupts = <19 2>;
> > + reg = <0>;
> > + device_type = "ethernet-phy";
> > + };
> > +
> > + PHY1: ethernet-phy at 1 {
> > + interrupt-parent = <&PIC>;
> > + interrupts = <19 2>;
> > + reg = <3>;
> > + device_type = "ethernet-phy";
> > + };
> > + };
> > +
> > + usb at 11b60 {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + compatible = "fsl,mpc8280-usb",
> > + "fsl,cpm2-usb";
> > + reg = <11b60 18 8b00 100>;
> > + interrupt-parent = <&PIC>;
> > + interrupts = <b 8>;
> > + fsl,cpm-command = <2e600000>;
> > + };
> > + };
> > +
> > + PIC: interrupt-controller at 10c00 {
> > + #interrupt-cells = <2>;
> > + interrupt-controller;
> > + reg = <10c00 80>;
> > + compatible = "fsl,mpc8280-pic", "fsl,pq2-pic";
>
> this should also have a "fsl,cpm2-pic" or something of that form.
> (exact same pic exists on 8560, 85xx+CPM)
>
> > + };
> > +
> > + pci at 10800 {
> > + device_type = "pci";
> > + reg = <10800 10c 101ac 8 101c4 8>;
> > + compatible = "fsl,mpc8280-pci", "fsl,pq2-pci";
> > + #interrupt-cells = <1>;
> > + #size-cells = <2>;
> > + #address-cells = <3>;
> > + clock-frequency = <d#66000000>;
> > + interrupt-map-mask = <f800 0 0 7>;
> > + interrupt-map = <
> > + /* IDSEL 0x16 */
> > + b000 0 0 1 &PCI_PIC 0
> > + b000 0 0 2 &PCI_PIC 1
> > + b000 0 0 3 &PCI_PIC 2
> > + b000 0 0 4 &PCI_PIC 3
> > +
> > + /* IDSEL 0x17 */
> > + b800 0 0 1 &PCI_PIC 4
> > + b800 0 0 2 &PCI_PIC 5
> > + b800 0 0 3 &PCI_PIC 6
> > + b800 0 0 4 &PCI_PIC 7
> > +
> > + /* IDSEL 0x18 */
> > + c000 0 0 1 &PCI_PIC 8
> > + c000 0 0 2 &PCI_PIC 9
> > + c000 0 0 3 &PCI_PIC a
> > + c000 0 0 4 &PCI_PIC b>;
> > +
> > + interrupt-parent = <&PIC>;
> > + interrupts = <12 8>;
> > + ranges = <42000000 0 80000000 80000000 0 20000000
> > + 02000000 0 a0000000 a0000000 0 20000000
> > + 01000000 0 00000000 f6000000 0
> 02000000>;
> > + };
> > + };
> > +
> > + chosen {
> > + linux,stdout-path = "/soc/cpm/serial at 11a00";
> > + };
> > +};
>
> - k
>
>
>
>
> ------------------------------
>
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> Linuxppc-dev mailing list
> Linuxppc-dev at ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>
> End of Linuxppc-dev Digest, Vol 37, Issue 87
> ********************************************
>
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