Hi all
I am using U-Boot 1.3.4 and an ELDK linux Kernel snapshot from the Denx
Git dated 14th October 2008-10-23
My custom architecture is based around a Power PC 860 processor.
I have written a Flattened Device Tree for the architecture.
I am having some trouble with the allocation of the Buffer Descriptors
when microcode is loaded.
My IMMR address is 0xfa200000 and the DPRAM is located at 0xfa202000.
The buffer descriptors are trying to be located at 0xfa202040, which is
all 0xFFs, as indicated by the cp_rccr = 0x3
I am debugging this with a BDI3000
My SMC console works fine IF I set rccr back to 0x0 during console_init
and the buffers are then allocated at 0xfa202040.
U-boot.1.3.4 is configured to use install micro code,
CFG_I2C_UCODE_PATCH.
Rightly or wrongly I have based my DTS file on the mpc866ads.dts file.
The relevant section of the DTS to setup the DPRAM space is,
muram {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x2000
0x2000>;
[EMAIL PROTECTED] {
compatible =
"fsl,cpm-muram-data";
reg = <0x0
0x1c00>;
};
};
console: [EMAIL PROTECTED] {
device_type = "serial";
compatible =
"fsl,mpc860-smc-uart",
"fsl,cpm1-smc-uart";
reg = <0xa90 0x10 0x3f80
0x40>;
interrupts = <3>;
interrupt-parent =
<&CPM_PIC>;
fsl,cpm-brg = <2>;
fsl,cpm-command =
<0xd0>;
current-speed = <9600>;
};
chosen {
linux,stdout-path = &console;
}
I have tried a few things, including setting the range of muram to
ranges = <0x0 0x3000 0x1000>;
Am I correct to assume this will push the muram above the microcode??
I think it is an obvious fix but at the moment I can't seem to locate
the problem.
Can someone please explain to me where I am going wrong?
or how I can correctly locate the Buffer descriptors so they do not
conflict with the locked address of the micro code??
Here is the output that I am getting at the moment
U-Boot 1.3.4 (Oct 22 2008 - 15:53:20)
CPU: XPC86xxxZPnnD4 at 48 MHz: 4 kB I-Cache 4 kB D-Cache FEC present
I2C: ready
DRAM: 16 MB
FLASH: 16 MB
Using default environment
In: serial
Out: serial
Err: serial
Net: SCC ETHERNET
Autobooting in 0 second, type "peek" to stop
## Booting kernel from Legacy Image at fe042000 ...
Image Name: Linux-2.6.27-dev20081014
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 1373155 Bytes = 1.3 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
## Flattened Device Tree blob at fe040000
Booting using the fdt blob at 0xfe040000
Loading Device Tree to 007fc000, end 007ffc6b ... OK
Thanks in Advance
Regards
Steve Gray
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