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authorUros Majstorovic <majstor@majstor.org>2020-08-05 03:39:22 +0200
committerUros Majstorovic <majstor@majstor.org>2020-08-05 03:39:22 +0200
commitcf7c06297d04bade9cd04c056f9ed510e64dd7bd (patch)
treea3b8cc23574b98e10874b51d33c9fe1bfc012663 /fw/fe310/eos/interrupt.c
parent5cd610a07468137066ea4daa5176c3e7045113b0 (diff)
code -> fw
Diffstat (limited to 'fw/fe310/eos/interrupt.c')
-rw-r--r--fw/fe310/eos/interrupt.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/fw/fe310/eos/interrupt.c b/fw/fe310/eos/interrupt.c
new file mode 100644
index 0000000..820d1fa
--- /dev/null
+++ b/fw/fe310/eos/interrupt.c
@@ -0,0 +1,72 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "encoding.h"
+#include "platform.h"
+#include "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_handler_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-1])) {
+ ext_interrupt_handler[int_num-1]();
+ } else {
+ printf("error:%d\n", int_num);
+ exit(int_num);
+ }
+ return 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_handler_t handler) {
+ ext_interrupt_handler[int_num-1] = handler;
+ PLIC_set_priority(&plic, int_num, priority);
+ PLIC_enable_interrupt(&plic, int_num);
+}
+
+void eos_intr_set_handler(uint8_t int_num, eos_intr_handler_t handler) {
+ ext_interrupt_handler[int_num-1] = handler;
+}
+
+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);
+}