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Diffstat (limited to 'docs/interrupt-framework-design.md')
| -rw-r--r-- | docs/interrupt-framework-design.md | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/docs/interrupt-framework-design.md b/docs/interrupt-framework-design.md index cee29a31..53707ae9 100644 --- a/docs/interrupt-framework-design.md +++ b/docs/interrupt-framework-design.md @@ -293,11 +293,9 @@ This component declares the following prototype for a handler of an interrupt ty void *handle, void *cookie); -The value of the `id` parameter depends upon the definition of the -`IMF_READ_INTERRUPT_ID` build time flag. When the flag is defined, `id` contains -the number of the highest priority pending interrupt of the type that this -handler was registered for. When the flag is not defined `id` contains -`INTR_ID_UNAVAILABLE`. +The `id` is parameter is reserved and could be used in the future for passing +the interrupt id of the highest pending interrupt only if there is a foolproof +way of determining the id. Currently it contains `INTR_ID_UNAVAILABLE`. The `flags` parameter contains miscellaneous information as follows. @@ -583,11 +581,10 @@ responsible for: irrecoverable error condition. 6. Calling the registered handler function for the interrupt type generated. - The firmware also determines the interrupt id if the IMF_READ_INTERRUPT_ID - build time flag is set. The id is set to `INTR_ID_UNAVAILABLE` if the flag - is not set. The id along with the current security state and a reference to - the `cpu_context_t` structure for the current security state are passed to - the handler function as its arguments. + The `id` parameter is set to `INTR_ID_UNAVAILABLE` currently. The id along + with the current security state and a reference to the `cpu_context_t` + structure for the current security state are passed to the handler function + as its arguments. The handler function returns a reference to the per-cpu `cpu_context_t` structure for the target security state. |