After acquiring the spin lock, the function invokes theackmethod of the main IRQ descriptor. When using the old 8259A PIC, the correspondingmask_and_ack_8259A( )function acknowledges the interrupt on the PIC and also disables the IRQ line. Masking the IRQ line ensures that the CPU does not...
Interrupt masking registers PRIMASK PRIMASK, FAULTMASK, and BASEPRI Interrupt latency in number of clock cycles (assuming a zero wait state memory system is being used) 15 12 If the TrustZone security extension is implemented, each of the interrupt sources can be programmed as Secure or Non-secur...
IRQ masking and prioritization. While IRQ masking allows certain interrupts to be temporarily ignored, improper masking can prevent important interrupts from being processed in a timely manner. Incorrect prioritization of interrupts can also result in critical tasks being delayed, leading to performance de...
Masking of a higher priority input does not affect the interrupt request lines of lower priority. There is a block that prioritizes the presentation of the interrupts. It determines the priorities of the bits set in the IRR. The highest priority is selected and strobed into the corresponding ...
This function sets the interrupt priority masking level so that all interrupts at the specified or lesser priority level are masked. Masking interrupts can be used to globally disable a set of interrupts with priority below a predetermined threshold. A value of 0 disables priority masking. ...
Masking the interrupt source ensures that the hardware state or data will not be disturbed during the following processing. The following function interface can be called:void rt_hw_interrupt_mask(int vector);After the rt_hw_interrupt_mask function interface is called, the corresponding interrupt ...
After acquiring the spin lock, the function invokes theackmethod of the main IRQ descriptor. In a uniprocessor system, the correspondingmask_and_ack_8259A( )function acknowledges the interrupt on the PIC and also disables the IRQ line. Masking the IRQ line ensures that the CPU does not accept...
Because disabling interrupts globally blocks all other interrupts, masking should take place for as short a time as possible. When you determine what has specifically interrupted, you can mask just that interrupt. A maskable interrupt is essentially a hardware interrupt that may be ignored by ...
masking off information pertaining to the particular interrupt address. Interrupt masking is permissible and even desirable in embodiments of the present invention, whose central tenet is that the CPU 108 does not respond to individual interrupts. The queue(s) 162 hold requests/data 91 from the ...
The last block of the interrupt masker is the Output Logic block (28). This circuit compares both the pulse signal issued from the Data Edge Detector (24) and the masking pulse issued from the Polarity Edge Detector (26). The output (REQ_OUT) of block (28) remains inactive when a mask...