> On 7 January 2012 20:56, Marek Vasut <marek.va...@gmail.com> wrote: > >> On 7 January 2012 20:11, Marek Vasut <marek.va...@gmail.com> wrote: > >> > The AMBA IDs are supposed to be at the end of 0x2000 block, which the > >> > PL011 UART allocates. Current QEMU implementation puts those IDs at > >> > 0x1000 offset, which is wrong. The QEMU implementation also allocates > >> > only 0x1000 instead of 0x2000 of space. > >> > >> Why do you think this change is correct? The PL011 TRM > >> http://infocenter.arm.com/help/topic/com.arm.doc.ddi0183g/I18381.html > >> says the ID registers are at 0xFE0..0xFFC. > >> and for instance on the PBX-A9 devboard: > >> http://infocenter.arm.com/help/topic/com.arm.doc.dui0440b/Bbajihec.html > >> the UARTs are at 0x10009000, 0x1000A000, 0x1000B000, 0x1000C000, so > >> they clearly can't be 0x2000 in size. > > > > Then we have a problem, because eg. on freescale mx28 they are 0x2000 > > big. The only conclusion I can draw from this is that the size of the > > segment that can be assigned to PL011 is variable and the ID-octet is > > always at the end. > > Can you point me to some documentation? I looked at > http://cache.freescale.com/files/dsp/doc/ref_manual/MCIMX28RM.pdf?fsrch=1&s > r=7 (i.MX28 Applications Processor Reference Manual) and although it has a > number of UARTs none of them looked obviously like PL011s.
That's it, look at DUART section and Memory map section. M > > -- PMM
