diff options
Diffstat (limited to 'doc/user/intr.t')
| -rw-r--r-- | doc/user/intr.t | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/doc/user/intr.t b/doc/user/intr.t index 2bf25a0369..ffd27bc475 100644 --- a/doc/user/intr.t +++ b/doc/user/intr.t @@ -68,7 +68,8 @@ processor and invokes the user's ISR. The user's ISR is responsible for processing the interrupt, clearing the interrupt if necessary, and device specific manipulation. -The interrupt_catch directive connects a procedure to +The @code{@value{DIRPREFIX}interrupt_catch} +directive connects a procedure to an interrupt vector. The interrupt service routine is assumed to abide by these conventions and have a prototype similar to the following: @@ -190,7 +191,8 @@ execute as non-maskable interrupts. @end ifinfo @subsection Establishing an ISR -The interrupt_catch directive establishes an ISR for +The @code{@value{DIRPREFIX}interrupt_catch} +directive establishes an ISR for the system. The address of the ISR and its associated CPU vector number are specified to this directive. This directive installs the RTEMS interrupt wrapper in the processor's @@ -403,10 +405,11 @@ NONE @subheading DESCRIPTION: This directive enables maskable interrupts to the @code{level} -which was returned by a previous call to @code{@value{DIRPREFIX}interrupt_disable}. +which was returned by a previous call to +@code{@value{DIRPREFIX}interrupt_disable}. Immediately prior to invoking this directive, maskable interrupts should -be disabled by a call to @code{@value{DIRPREFIX}interrupt_disable} and will be enabled -when this directive returns to the caller. +be disabled by a call to @code{@value{DIRPREFIX}interrupt_disable} +and will be enabled when this directive returns to the caller. @subheading NOTES: @@ -444,10 +447,11 @@ NONE @subheading DESCRIPTION: This directive temporarily enables maskable interrupts to the @code{level} -which was returned by a previous call to @code{@value{DIRPREFIX}interrupt_disable}. +which was returned by a previous call to +@code{@value{DIRPREFIX}interrupt_disable}. Immediately prior to invoking this directive, maskable interrupts should -be disabled by a call to @code{@value{DIRPREFIX}interrupt_disable} and will be redisabled -when this directive returns to the caller. +be disabled by a call to @code{@value{DIRPREFIX}interrupt_disable} +and will be redisabled when this directive returns to the caller. @subheading NOTES: |