Rearchitecture PS2KB driver using event buffers

kernel/hal/x86_64/intr.c

@@ -12,10 +12,25 @@
 #include "proc/proc.h"
 #include "syscall/syscall.h"
 #include "errors.h"
-#include "drivers/ps2kb/ps2kb.h"
 #include "ipc/pipe/pipe.h"
 #include "rbuf/rbuf.h"
-#include "dev/ps2kbdev.h"
+#include "dlmalloc/malloc.h"
+#include "util/util.h"
+
+typedef struct IntrHandler {
+  struct IntrHandler *next;
+  void (*fn)(void);
+  int irq;
+} IntrHandler;
+
+IntrHandler *INTR_HANDLERS = NULL;
+
+void intr_attchhandler(void (*fn)(void), int irq) {
+  IntrHandler *ih = dlmalloc(sizeof(*ih));
+  ih->fn = fn;
+  ih->irq = irq;
+  LL_APPEND(INTR_HANDLERS, ih);
+}
 
 typedef struct BackTraceFrame {
   struct BackTraceFrame *rbp;
@@ -211,13 +226,12 @@ void intr_handleintr(IntrStackFrame *frame) {
         intr_eoi();
         proc_sched((void *)frame);
         break;
-      case INTR_IRQBASE+1:
-        int32_t c = ps2kb_intr();
-        if (c >= 0 && PS2KB_BUF.init) {
-          uint8_t b = c;
-          spinlock_acquire(&PS2KB_BUF.spinlock);
-          rbuf_push(&PS2KB_BUF.rbuf, b);
-          spinlock_release(&PS2KB_BUF.spinlock);
+      default:
+        IntrHandler *ih, *ihtmp;
+        LL_FOREACH_SAFE(INTR_HANDLERS, ih, ihtmp) {
+          if (ih->irq == frame->trapnum) {
+            ih->fn();
+          }
         }
         intr_eoi();
         break;

kernel/hal/x86_64/intr.h

@@ -33,6 +33,7 @@ typedef struct {
   uint64_t ss;
 } PACKED IntrStackFrame;
 
+void intr_attchhandler(void (*fn)(void), int irq);
 void intr_init(void);
 
 #endif // HAL_INTR_H_