| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | config PCI |
| 2 | bool "PCI support" |
| Paul Mundt | 357d594 | 2007-06-11 15:32:07 +0900 | [diff] [blame] | 3 | depends on SYS_SUPPORTS_PCI |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | help |
| 5 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 6 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 7 | your box. If you have PCI, say Y, otherwise N. |
| 8 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | config SH_PCIDMA_NONCOHERENT |
| 10 | bool "Cache and PCI noncoherent" |
| 11 | depends on PCI |
| 12 | default y |
| 13 | help |
| 14 | Enable this option if your platform does not have a CPU cache which |
| 15 | remains coherent with PCI DMA. It is safest to say 'Y', although you |
| 16 | will see better performance if you can say 'N', because the PCI DMA |
| 17 | code will not have to flush the CPU's caches. If you have a PCI host |
| 18 | bridge integrated with your SH CPU, refer carefully to the chip specs |
| 19 | to see if you can say 'N' here. Otherwise, leave it as 'Y'. |