The PIPE module has the following
features:
- Hardware support for interrupt prioritization, arbitration, grouping, software
hand-shake, and nesting.
- Dynamic arbitration of interrupts
in hardware on every clock.
- Selectable priority level to
choose interrupts as either RTINT and INT.
- Interrupt grouping of
adjacent-prioritized interrupts to block nesting within groups.
- Default index-based priority
order for interrupts used in arbitration.
- Vector fetch support for RESET,
NMI, RTINT, and INT.
- User access to the stack
configured for INT.
- Contexts used by a software task
manager system or operating system.
- Link-based protection verifies
only legal code from the assigned interrupt owner services the interrupt.
- Device level protection validates
only legal code source updates interrupt configuration and vector tables.
- Automatic context save and
restore for RTINT and NMI.
- RTINT stack overflow protection
always provides NMI a block of reserved stack space for execution.
- ECC protection for interrupt
vector table.
- Parity protection for
configuration registers.
- Optional locking capability of
interrupt configurations.