X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/c1811aecaae88bc006ce20bd301a6519dd89abda..2e21eb2f39dd80aa166216381d5d402be943686e:/lunaix-os/kernel/asm/x86/interrupts.c

diff --git a/lunaix-os/kernel/asm/x86/interrupts.c b/lunaix-os/kernel/asm/x86/interrupts.c
index 686c43d..8330bc2 100644
--- a/lunaix-os/kernel/asm/x86/interrupts.c
+++ b/lunaix-os/kernel/asm/x86/interrupts.c
@@ -1,16 +1,83 @@
 #include <arch/x86/interrupts.h>
-#include <libc/stdio.h>
+#include <hal/apic.h>
+#include <hal/cpu.h>
+#include <lunaix/syslog.h>
+#include <lunaix/tty/tty.h>
+#include <lunaix/process.h>
+#include <lunaix/sched.h>
+#include <lunaix/mm/page.h>
 
-void isr0 (isr_param* param) {
-    printf("[PANIC] Exception (%d) CS=0x%X, EIP=0x%X", param->vector, param->cs, param->eip);
+LOG_MODULE("intr")
+
+static int_subscriber subscribers[256];
+
+static int_subscriber fallback = (int_subscriber) 0;
+
+void
+intr_subscribe(const uint8_t vector, int_subscriber subscriber) {
+    subscribers[vector] = subscriber;
+}
+
+void
+intr_unsubscribe(const uint8_t vector, int_subscriber subscriber) {
+    if (subscribers[vector] == subscriber) {
+        subscribers[vector] = (int_subscriber) 0;
+    }
+}
+
+void
+intr_set_fallback_handler(int_subscriber subscribers) {
+    fallback = subscribers;
 }
 
-void 
-interrupt_handler(isr_param* param) {
-    switch (param->vector)
-    {
-        case 0:
-            isr0(param);
-            break;
+extern x86_page_table* __kernel_ptd;
+
+void
+intr_handler(isr_param* param)
+{
+    // if (param->vector == LUNAIX_SYS_CALL) {
+    //     kprintf(KDEBUG "%p", param->registers.esp);
+    // }
+    __current->intr_ctx = *param;
+
+    cpu_lcr3(__kernel_ptd);
+
+    isr_param *lparam = &__current->intr_ctx;
+    
+    if (lparam->vector <= 255) {
+        int_subscriber subscriber = subscribers[lparam->vector];
+        if (subscriber) {
+            subscriber(lparam);
+            goto done;
+        }
+    }
+
+    if (fallback) {
+        fallback(lparam);
+        goto done;
+    }
+    
+    kprint_panic("INT %u: (%x) [%p: %p] Unknown",
+            lparam->vector,
+            lparam->err_code,
+            lparam->cs,
+            lparam->eip);
+
+done:
+
+    // if (__current->state != PROC_RUNNING) {
+    //     schedule();
+    // }
+
+    // for all external interrupts except the spurious interrupt
+    //  this is required by Intel Manual Vol.3A, section 10.8.1 & 10.8.5
+    if (lparam->vector >= EX_INTERRUPT_BEGIN && lparam->vector != APIC_SPIV_IV) {
+        apic_done_servicing();
     }
+
+    cpu_lcr3(__current->page_table);
+
+    *param = __current->intr_ctx;
+
+    return;
 }
\ No newline at end of file