RE: [U-Boot-Users] Please explain this code in drivers/pci.c

Subject: [U-Boot-Users] Please explain this code in drivers/pci.c

The value of bar_response is 0xffff8008 which looks good. This gives bar

size of

0x8000 which also looks good. The value of mem is initially 0x90000000.

So,

(mem - 1) = 0x8fffffff and (bar_size - 1) = 0x7fff). When these are or'd

one gets

0x8fffffff and adding 1 gives 0x90000000. This result is that the card is

given 4

address bases all at 0x90000000.

If the card wants 4 different memory regiuons, I assume it has 4 BAR registers? Each BAR must have the correct base address, so you have to add the size of the last region to the memory pointer before writing the address to the next BAR