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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/mach.texi | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/doc/mach.texi b/doc/mach.texi index 91ec96ee..11b0a066 100644 --- a/doc/mach.texi +++ b/doc/mach.texi @@ -286,6 +286,7 @@ Device Interface * Device Map:: Mapping devices into virtual memory. * Device Status:: Querying and manipulating a device. * Device Filter:: Filtering packets arriving on a device. +* Device Interrupt:: Getting hardware interrupt notifications. Kernel Debugger @@ -6305,6 +6306,7 @@ All constants and functions in this chapter are defined in * Device Map:: Mapping devices into virtual memory. * Device Status:: Querying and manipulating a device. * Device Filter:: Filtering packets arriving on a device. +* Device Interrupt:: Getting hardware interrupt notifications. @end menu @@ -6699,6 +6701,26 @@ a device port or the device is dead or not completely open. @end deftypefun +@node Device Interrupt +@section Device Interrupt + +@deftypefun kern_return_t device_intr_register (@w{device_t @var{device}}, @w{int @var{id}}, @w{int @var{flags}}, @w{mach_port_t @var{receive_port}}) +The function @code{device_intr_register} registers for receiving hardware +interrupt events through @var{device_intr_notify} notifications. The hardware +interrupt identifier is specified by @var{id}. @var{flags} must be set to 0. The +notifications will be sent on the @var{receive_port} send right. +@code{device_intr_register} is only available on the dedicated @code{irq} device. +@end deftypefun + +@deftypefun kern_return_t device_intr_ack (@w{device_t @var{device}}, @w{mach_port_t @var{receive_port}}) +On a hardware interrupt, the kernel disables the interrupt line before sending +notifications. To prevent from interrupt losses, the interrupt is kept disabled +until @code{device_intr_ack} is called to acknowledge the interrupt. +@var{receive_port} is the send right on which the interrupt notification was +received. +@end deftypefun + + @node Kernel Debugger @chapter Kernel Debugger |