Hello,
I was able to boot Kernel 2.6.26.8 (using our old dts file from
Kernel 2.6.25). However, I need to upgrade to a newer Kernel because
I am having serious problems with the ethernet interface under heavy
load. I am not sure if it could be a scheduling problem or the network
driver. CPU usage is low but load average is high (more than 4).
The main difference that I could find is that for newer Kernels the
/arch/ppc was removed. I also read online that dts version changed
from 0 to 1 somewhere around Kernel 2.6.27 or so.
Following your instruction, I executed in the LTIB command shell:
LTIB> dtc -I dtb -O dts ../mpc8272ads.dtb
I executed that command passing as argument the old working dtb file.
I got a dts file which I placed in the new Kernel and compiled.
Unfortunately, I am still getting the same error.
Attached you can find both dts files.
Thank you.
--
Andres F Marquez
EdgeAccess
Development
amarq...@edgeaccess.net
On Thu, 2010-01-14 at 15:44 -0600, Scott Wood wrote:
> Andres F Marquez wrote:
> > Hello,
> >
> > I am working on a MPC8265 board which I have successfully ported Linux
> > Kernel 2.6.25 to. I am trying to upgrade the Kernel but have not got
> > good results (I am able to compile the Kernel for my powerpc, but not to
> > boot it). The problem appears to be something related to the interaction
> > between the dtb and the Kernel. I am not sure if the syntax for the dts
> > file may have changed from Kernel 2.6.25 to newer versions (I have tried
> > 2.6.27.43 - 2.6.32.2 and 2.6.31.11 getting very similar results).
>
> Can you bisect between 2.6.25 and 2.6.27 to see which commit may have
> broken it?
>
> What sort of changes did you make to get 2.6.25 to work?
>
> > When I build the dtb file from the /arch/powerpc/boot/dts/MPC8272ADS.dts
> > file that comes with the new Kernel, the booting process gets stuck
> > after trying to load the device tree:
> >
> > ## Booting image at ff810000 ...
> > Image Name: Linux-2.6.27.43
> > Image Type: PowerPC Linux Kernel Image (gzip
> > compressed)
> > Data Size: 1365263 Bytes = 1.3 MB
> > Load Address: 00000000
> > Entry Point: 00000000
> > Verifying Checksum ... OK
> > Uncompressing Kernel Image ... OK
> > Booting using the fdt at 0xff802000
> > Loading Device Tree to 007fc000, end 007fefff ... OK
> >
> >
> > However, when I boot the new Kernel with the old compiled dtb file
> > (the one that works with the Kernel 2.6.25) the process moves forward
> > but stops at a time when displaying information about IRQ 40 line
> > (related to the Programmable Interrup Controller (PIC)):
>
> Decompile that device tree blob using dtc -I dtb -O dts, and look for
> differences.
>
> -Scott
/*
* 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>;
c...@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>;
};
};
memory {
device_type = "memory";
reg = <00000000 02000000>;
};
local...@f0010100 {
compatible = "fsl,mpc8280-localbus",
"fsl,pq2-localbus";
#address-cells = <2>;
#size-cells = <1>;
reg = <f0010100 60>;
ranges = <0 0 fe000000 00800000
1 0 f4500000 00008000
8 0 f8200000 00008000>;
fl...@0,0 {
compatible = "jedec-flash";
reg = <0 0 800000>;
bank-width = <4>;
device-width = <1>;
};
b...@1,0 {
reg = <1 0 20>;
compatible = "fsl,pq2fads-bcsr";
};
PCI_PIC: p...@8,0 {
#interrupt-cells = <1>;
interrupt-controller;
reg = <8 0 8>;
compatible = "fsl,pq2ads-pci-pic";
interrupt-parent = <&PIC>;
interrupts = <18 8>;
};
};
p...@f0010800 {
device_type = "pci";
reg = <f0010800 10c f00101ac 8 f00101c4 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>;
};
s...@f0000000 {
#address-cells = <1>;
#size-cells = <1>;
device_type = "soc";
compatible = "fsl,mpc8280", "fsl,pq2-soc";
ranges = <00000000 f0000000 00053000>;
// Temporary -- will go away once kernel uses ranges for
get_immrbase().
reg = <f0000000 00053000>;
c...@119c0 {
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
compatible = "fsl,mpc8280-cpm", "fsl,cpm2";
reg = <119c0 30>;
ranges;
mu...@0 {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 0 10000>;
d...@0 {
compatible = "fsl,cpm-muram-data";
reg = <0 2000 9800 800>;
};
};
b...@119f0 {
compatible = "fsl,mpc8280-brg",
"fsl,cpm2-brg",
"fsl,cpm-brg";
reg = <119f0 10 115f0 10>;
};
ser...@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>;
};
ser...@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>;
};
ether...@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>;
local-mac-address = [00 e0 0a 0b 79 01];
};
ether...@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];
};
m...@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-...@0 {
interrupt-parent = <&PIC>;
interrupts = <19 2>;
reg = <0>;
device_type = "ethernet-phy";
};
PHY1: ethernet-...@1 {
interrupt-parent = <&PIC>;
interrupts = <19 2>;
reg = <3>;
device_type = "ethernet-phy";
};
};
u...@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-control...@10c00 {
#interrupt-cells = <2>;
interrupt-controller;
reg = <10c00 80>;
compatible = "fsl,mpc8280-pic", "fsl,cpm2-pic";
};
};
chosen {
linux,stdout-path = "/soc/cpm/ser...@11a00";
};
};
/*
* 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>;
c...@0 {
device_type = "cpu";
reg = <0>;
d-cache-line-size = <32>;
i-cache-line-size = <32>;
d-cache-size = <16384>;
i-cache-size = <16384>;
timebase-frequency = <0>;
clock-frequency = <0>;
};
};
memory {
device_type = "memory";
reg = <00000000 02000000>;
};
s...@f0000000 {
#address-cells = <1>;
#size-cells = <1>;
device_type = "soc";
compatible = "fsl,mpc8280", "fsl,pq2-soc";
ranges = <00000000 f0000000 00053000>;
// Temporary -- will go away once kernel uses ranges for
get_immrbase().
reg = <f0000000 00053000>;
c...@119c0 {
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
compatible = "fsl,mpc8280-cpm", "fsl,cpm2";
reg = <119c0 30>;
ranges;
mu...@0 {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 0 10000>;
d...@0 {
compatible = "fsl,cpm-muram-data";
reg = <0 2000 9800 800>;
};
};
b...@119f0 {
compatible = "fsl,mpc8280-brg",
"fsl,cpm2-brg",
"fsl,cpm-brg";
reg = <119f0 10 115f0 10>;
};
ser...@11a00 {
device_type = "serial";
compatible = "fsl,mpc8280-scc-uart",
"fsl,cpm2-scc-uart";
reg = <11a00 20 8000 100>;
interrupts = <40 8>;
interrupt-parent = <&PIC>;
fsl,cpm-brg = <1>;
fsl,cpm-command = <00800000>;
};
ser...@11a20 {
device_type = "serial";
compatible = "fsl,mpc8280-scc-uart",
"fsl,cpm2-scc-uart";
reg = <11a20 20 8100 100>;
interrupts = <41 8>;
interrupt-parent = <&PIC>;
fsl,cpm-brg = <2>;
fsl,cpm-command = <04a00000>;
};
ether...@11320 {
device_type = "network";
compatible = "fsl,mpc8280-fcc-enet",
"fsl,cpm2-fcc-enet";
reg = <11320 20 8500 100 113b0 1>;
interrupts = <33 8>;
interrupt-parent = <&PIC>;
phy-handle = <&PHY0>;
linux,network-index = <0>;
fsl,cpm-command = <16200300>;
local-mac-address = [00 e0 0a 0b 79 01];
};
ether...@11340 {
device_type = "network";
compatible = "fsl,mpc8280-fcc-enet",
"fsl,cpm2-fcc-enet";
reg = <11340 20 8600 100 113d0 1>;
interrupts = <34 8>;
interrupt-parent = <&PIC>;
phy-handle = <&PHY1>;
linux,network-index = <1>;
fsl,cpm-command = <1a400300>;
local-mac-address = [00 e0 0c 00 79 01];
};
m...@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-...@0 {
interrupt-parent = <&PIC>;
interrupts = <25 2>;
reg = <0>;
device_type = "ethernet-phy";
};
PHY1: ethernet-...@1 {
interrupt-parent = <&PIC>;
interrupts = <25 2>;
reg = <3>;
device_type = "ethernet-phy";
};
};
};
PIC: interrupt-control...@10c00 {
#interrupt-cells = <2>;
interrupt-controller;
reg = <10c00 80>;
compatible = "fsl,mpc8280-pic", "fsl,cpm2-pic";
};
};
chosen {
linux,stdout-path = "/soc/cpm/ser...@11a00";
};
};
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
