Merge branch 'device-sys'

[lunaix-os.git] / 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 c79ed07300e12492d01e8c97ed6a4383543c2ca2..864c7da58af3df7f09a292feee299df532474e43 100644 (file)
--- a/lunaix-os/kernel/asm/x86/interrupts.c
+++ b/lunaix-os/kernel/asm/x86/interrupts.c
@@ -1,60 +1,75 @@
 #include <arch/x86/interrupts.h>
+#include <arch/x86/tss.h>
+#include <hal/apic.h>
 #include <hal/cpu.h>
-#include <libc/stdio.h>
+#include <lunaix/mm/page.h>
+#include <lunaix/mm/vmm.h>
+#include <lunaix/process.h>
+#include <lunaix/sched.h>
+#include <lunaix/syslog.h>
 #include <lunaix/tty/tty.h>
 
+LOG_MODULE("intr")
+
+static int_subscriber subscribers[256];
+
+static int_subscriber fallback = (int_subscriber)0;
+
 void
-panic_msg(const char* msg)
+intr_subscribe(const uint8_t vector, int_subscriber subscriber)
 {
-    tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_RED);
-    tty_clear_line(10);
-    tty_clear_line(11);
-    tty_clear_line(12);
-    tty_set_cpos(0, 11);
-    printf("  %s", msg);
+    subscribers[vector] = subscriber;
 }
 
 void
-panic(const char* msg, isr_param* param)
+intr_unsubscribe(const uint8_t vector, int_subscriber subscriber)
 {
-    char buf[1024];
-    sprintf(buf,
-            "INT %u: (%x) [%p: %p] %s",
-            param->vector,
-            param->err_code,
-            param->cs,
-            param->eip,
-            msg);
-    panic_msg(buf);
-    while (1)
-        ;
+    if (subscribers[vector] == subscriber) {
+        subscribers[vector] = (int_subscriber)0;
+    }
 }
 
 void
-interrupt_handler(isr_param* param)
+intr_set_fallback_handler(int_subscriber subscribers)
+{
+    fallback = subscribers;
+}
+
+extern x86_page_table* __kernel_ptd;
+
+void
+intr_handler(isr_param* param)
 {
-    switch (param->vector) {
-        case 0:
-            panic("Division by 0", param);
-            break; // never reach
-        case FAULT_GENERAL_PROTECTION:
-            panic("General Protection", param);
-            break; // never reach
-        case FAULT_PAGE_FAULT:
-            void* pg_fault_ptr = cpu_rcr2();
-            if (pg_fault_ptr) {
-                panic("Page Fault", param);
-            } else {
-                panic("Null pointer reference", param);
-            }
-            break; // never reach
-        case LUNAIX_SYS_PANIC:
-            panic_msg((char*)(param->registers.edi));
-            while (1)
-                ;
-            break; // never reach
-        default:
-            panic("Unknown Interrupt", param);
-            break; // never reach
+    __current->intr_ctx = *param;
+
+    isr_param* lparam = &__current->intr_ctx;
+
+    if (lparam->vector <= 255) {
+        int_subscriber subscriber = subscribers[lparam->vector];
+        if (subscriber) {
+            subscriber(param);
+            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:
+    // 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();
+    }
+
+    return;
 }
\ No newline at end of file