OS21, ARM

Board support packages

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4.2.3

Interrupt controller base address

This variable informs OS21 of the base address of the interrupt controller.

For example:

void * bsp_intc_base_address

= (void *)(0x90410000);

This tells OS21 the interrupt controller registers commence at address 0x90410000.

4.2.4

Interrupt controller slave priority

On platforms that support interrupt levels, and where slave controllers drive master

controllers, this variable informs OS21 of the priority of the slave controller interrupts relative

to the interrupts on the master. For example:

unsigned int bsp_intc_slave_pri = 15;

This says that all interrupts on the slave controller are given a priority of 15 into the master

controller.

Note:

This item is not required on platforms that do not support interrupt priority levels.

4.2.5

Interrupt controller initialization flags

interrupt_init_flags_t bsp_interrupt_init_flags;

This is a set of flags that are used to control how OS21 initializes the interrupt subsystem.

These may be combined by logically ORing the appropriate flags.

The normal value on ARM platforms is 0.