PLIC API Calls

plic_set_priority()

Usage	`void plic_set_priority(u32 plic, u32 gateway, u32 priority)`
Include	driver/plic.h
Parameters	[IN] `plic` PLIC base address [IN] `gateway` interrupt type. Gateway is the interrupt number for a particular peripheral when configuring the Sapphire SoC. The gateway for all peripherals are available in soc.h, i.e., SYSTEM_PLIC_TIMER_INTERRUPTS_0. [IN] `priority` interrupt priority. Priority can be set within a range of 0 to 3.
Description	Set the interrupt priority.

plic_get_priority()

Usage	`u32 plic_get_priority(u32 plic, u32 gateway)`
Include	driver/plic.h
Parameters	[IN] `plic` PLIC base address [IN] `gateway` interrupt type
Returns	[OUT] 32-bit priority
Description	Get the interrupt priority.

plic_set_enable()

Usage	`void plic_set_enable(u32 plic, u32 target, u32 gateway, u32 enable)`
Include	driver/plic.h
Parameters	[IN] `plic` PLIC base address [IN] `target` HART number [IN] `gateway` interrupt type [IN] `enable` Enable interrupt for the particular gateway on the selected target.
Description	Set the interrupt enable.

plic_set_threshold()

Usage	`void plic_set_threshold(u32 plic, u32 target, u32 threshold)`
Include	driver/plic.h
Parameters	[IN] `plic` PLIC base address [IN] `target` HART number [IN] `threshold` HART interrupt threshold
Description	Set the threshold of a particular HART to accept interrupt source.
Example	`plic_set_threshold(BSP_PLIC, BSP_PLIC_CPU_0, 0); // cpu 0 accept all interrupts with priority above 0`

plic_claim()

Usage	`u32 plic_claim(u32 plic, u32 target)`
Include	driver/plic.h
Parameters	[IN] `plic` PLIC base address [IN] `target` HART number
Description	Claim the PLIC interrupt for specific HART.

plic_release()

Usage	`void plic_release(u32 plic, u32 target, u32 gateway)`
Include	driver/plic.h
Parameters	[IN] `plic` PLIC base address [IN] `target` HART number [IN] `gateway` interrupt type
Description	Release the PLIC interrupt for specific HART.