Re: ARCH=ppc -> ARCH=powerpc : help needed for dts file

Hi Ben,

On Tue, Mar 04, 2008 at 08:26:14AM +1100, Benjamin Herrenschmidt wrote:

quoted

quoted

Maybe your PCI interrupt-map is wrong...

Is the PCI-interrupt map that part of the dts file :

                interrupt-map = <

                        /* IDSEL 0x02 */
                        1000 0 0 1 &mpic 1 1
                        1000 0 0 2 &mpic 2 1
                        1000 0 0 3 &mpic 3 1
                        1000 0 0 4 &mpic 4 1

                        /* IDSEL 0x03 */
                        1800 0 0 1 &mpic 4 1
                        1800 0 0 2 &mpic 1 1
                        1800 0 0 3 &mpic 2 1
                        1800 0 0 4 &mpic 3 1

			...

I do not understand anything there :(

It's documented in booting-without-of.txt afaik... The interrupt-map
goes along with the interrupt-map-mask. The later defines which bits of
the map are relevant.

Maybe I should read my mail in time-of-arrival order :)

The first part of the map is 3 cells containing a PCI address, followed
by a cell containing a PCI IRQ line (1=A....4=D). The next is the parent
interrupt controller, followed by the IRQ specification, which for MPIC
is the interrupt number on that controller, followed by an encoding of
the interrupt polarity & trigger type (1 for level-low).

The first part, the PCI address, has a special format, which should be
documented as well in the document I pointed out. For readability, we
ommited the top 16 bits of the first cell, which are the address type
and bus number, mostly irrelevant for interrupt mapping. The next bits
are the device/function. Usually only the device part is unmasked.

1. Can all that info be found in /proc in a running system or even in the
sources, or do I need an hardware doc for that ?

2. Maybe you could explain the conversion between the kernel/lsusb notation
(0000:00:12.0, 0000:00:12.1, 0000:00:12.2)

or /proc/bus/pci notation :
0090    104cac46        35              9ffff000                       0                      0                0                       0                       0
                       0                    1000                       0                      0                0                       0                       0
                       0        yenta_cardbus
0091    104cac46        36              9fbfe000                       0                      0                0                       0                       0
                       0                    1000                       0                      0                0                       0                       0
                       0        yenta_cardbus
0092    104c802a        37              9f7fd800                9f7f8000                      0                0                       0                       0
                       0                     800                    4000                      0                0                       0                       0
                       0        ohci1394

and dts-notation ?

Thanks for listening

Philippe