Message Signaled Interrupts
From Wikipedia, the free encyclopedia
Message Signaled Interrupts, in PCI 2.2 and later and PCI Express, is an alternate form of interrupt from the traditional pin-signalled system; instead of asserting a given IRQ pin, a message is written to a segment of system memory. Each device can have from 1 to 32 unique memory locations in which to write MSI events to. An advantage of the MSI system is that data can be pushed along with the MSI event, allowing for greater functionality.
[edit] References
- The PCI 2.2 standard, section 6.8
[edit] External links
- A brief summary of MSI
- MSDN paper on MSI in Windows Vista
- Linux MSI HOWTO
- Changes required to support MSI in FreeBSD
- Changes made to support MSI in Solaris Express
 |
This computer-related article is a stub. You can help Wikipedia by expanding it. |
