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&sr=7 (i.MX28 Applications Processor Reference Manual) and although it has a number of UARTs none of them looked obviously like PL011s. -- PMM
