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#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include "encoding.h"
#include "platform.h"
#include "plic/plic_driver.h"
#include "interrupt.h"
// Global Instance data for the PLIC
// for use by the PLIC Driver.
static plic_instance_t plic;
static eos_intr_fptr_t ext_interrupt_handler[PLIC_NUM_INTERRUPTS];
uintptr_t eos_intr_handle(uintptr_t int_num) {
if ((int_num >=1) && (int_num < PLIC_NUM_INTERRUPTS) && (ext_interrupt_handler[int_num])) {
ext_interrupt_handler[int_num]();
} else {
write(1, "error\n", 6);
exit(int_num);
}
return int_num;
}
void handle_m_ext_interrupt(void) {
plic_source int_num = PLIC_claim_interrupt(&plic);
eos_intr_handle(int_num);
PLIC_complete_interrupt(&plic, int_num);
}
void eos_intr_init(void) {
for (int i = 0; i < PLIC_NUM_INTERRUPTS; i++){
ext_interrupt_handler[i] = NULL;
}
/**************************************************************************
* Set up the PLIC
**************************************************************************/
PLIC_init(&plic,
PLIC_CTRL_ADDR,
PLIC_NUM_INTERRUPTS,
PLIC_NUM_PRIORITIES);
// Enable Global (PLIC) interrupts.
set_csr(mie, MIP_MEIP);
// Enable all interrupts
set_csr(mstatus, MSTATUS_MIE);
}
void eos_intr_set(uint8_t int_num, uint8_t priority, eos_intr_fptr_t handler) {
ext_interrupt_handler[int_num] = handler;
PLIC_set_priority(&plic, int_num, priority);
PLIC_enable_interrupt(&plic, int_num);
}
void eos_intr_set_priority(uint8_t int_num, uint8_t priority) {
PLIC_set_priority(&plic, int_num, priority);
}
void eos_intr_enable(uint8_t int_num) {
PLIC_enable_interrupt(&plic, int_num);
}
void eos_intr_disable(uint8_t int_num) {
PLIC_disable_interrupt(&plic, int_num);
}
void eos_intr_mask(uint8_t priority) {
PLIC_set_threshold(&plic, priority);
}
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