Re: [PATCH v4 2/4] arm64: dts: APM X-Gene PCIe device tree nodes
From: Arnd Bergmann
Date: Sat Mar 15 2014 - 04:59:29 EST
On Saturday 15 March 2014, Tanmay Inamdar wrote:
> On Fri, Mar 14, 2014 at 5:07 AM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> > On Thursday 06 March 2014, Tanmay Inamdar wrote:
> >> + pcie0: pcie@1f2b0000 {
> >> + status = "disabled";
> >> + device_type = "pci";
> >> + compatible = "apm,xgene-storm-pcie", "apm,xgene-pcie";
> >> + #interrupt-cells = <1>;
> >> + #size-cells = <2>;
> >> + #address-cells = <3>;
> >> + reg = < 0x00 0x1f2b0000 0x0 0x00010000 /* Controller registers */
> >> + 0xe0 0xd0000000 0x0 0x00200000>; /* PCI config space */
> >> + reg-names = "csr", "cfg";
> >> + ranges = <0x01000000 0x00 0x00000000 0xe0 0x00000000 0x00 0x00010000 /* io */
> >> + 0x02000000 0x00 0x10000000 0xe0 0x10000000 0x00 0x80000000>; /* mem */
> >> + dma-ranges = <0x42000000 0x40 0x00000000 0x40 0x00000000 0x40 0x00000000>;
> >> + interrupt-map-mask = <0x0 0x0 0x0 0x7>;
> >> + interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0xc2 0x1
> >> + 0x0 0x0 0x0 0x2 &gic 0x0 0xc3 0x1
> >> + 0x0 0x0 0x0 0x3 &gic 0x0 0xc4 0x1
> >> + 0x0 0x0 0x0 0x4 &gic 0x0 0xc5 0x1>;
> >> + clocks = <&pcie0clk 0>;
> >> + };
> >
> > Is 0x40.0x00000000 the start of your RAM? I had expected RAM to start at 0.0,
> > and in that case the dma-ranges property would be wrong.
>
> RAM starting address is 0x40_00000000.
Ok, it's good then. Thanks for the clarification, I keep losing track of how each of
the ~40 SoCs I'm dealing with handles these things.
Arnd
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