diff options
Diffstat (limited to 'src/machine.tex')
| -rw-r--r-- | src/machine.tex | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/machine.tex b/src/machine.tex index 438f75a..e44c0af 100644 --- a/src/machine.tex +++ b/src/machine.tex @@ -1388,13 +1388,13 @@ Synchronous exceptions are of lower priority than all interrupts. The machine-level interrupt fixed-priority ordering rules were developed with the following rationale. - The platform-specific machine-level interrupt sources in bits 16 and - above have the highest service priority to support very fast local - vectored interrupts. - Interrupts for higher privilege modes must be serviced before interrupts for lower privilege modes to support pre-emption. + The platform-specific machine-level interrupt sources in bits 16 and above + have platform-specific priority, but are typically chosen to have the + highest service priority to support very fast local vectored interrupts. + External interrupts are handled before internal (timer/software) interrupts as external interrupts are usually generated by devices that might require low interrupt service times. |