PLIC Peripheral Interface

Use the SYSTEM_PLIC_CTRL parameter to reference the interface PLIC interface.

Table 1. RISC-V PLIC Operation Parameters

Defines	Description
Interrupt priorities registers	The interrupt priority for each interrupt source.
Interrupt pending bits registers	The interrupt pending status of each interrupt source.
Interrupt enables registers	Enables the interrupt source of each context.
Priority thresholds registers	The interrupt priority threshold of each context.
Interrupt claim registers	The register to acquire interrupt source ID of each context.
Interrupt completion registers	The register to send interrupt completion message to the associated gateway.

The soc.h file contains a number of PLIC parameters to specify the interrupt ID for the various peripherals.

Table 2. PLIC Interrupt ID ParametersWhere n is the peripheral number and m is the interrupt ID.

Parameter	Refer to
SYSTEM_PLIC_SYSTEM_AXI_A_INTERRUPT	Interrupts
SYSTEM_PLIC_USER_INTERRUPT_A_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_B_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_C_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_D_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_E_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_F_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_G_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_H_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_I_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_J_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_K_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_L_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_M_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_N_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_O_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_P_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_Q_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_R_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_S_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_T_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_U_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_V_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_W_INTERRUPT SYSTEM_PLIC_USER_INTERRUPT_X_INTERRUPT	Interrupts
SYSTEM_PLIC_SYSTEM_USER_TIMER_n_INTERRUPTS_m	Timer Limit Register: 0x0000_00044