Changeset 242 for trunk/hal/x86_64/core/x86_printf.c

Timestamp:

Jul 20, 2017, 10:29:05 AM (7 years ago)

Author:

max@…

Message:

add a dumb lock for the console

File:

• trunk/hal/x86_64/core/x86_printf.c (modified) (1 diff)

trunk/hal/x86_64/core/x86_printf.c

@@ -42 +42 @@
 size_t cons_ptr __in_kdata = 0;
 
+/* -------------------------------------------------------------------------- */
+
+static uint32_t x86_lock_val __in_kdata = 0;
+
+void x86_lock()
+{
+        while (!hal_atomic_cas(&x86_lock_val, 0, 1)) {
+                /* wait */
+        }
+}
+
+void x86_unlock()
+{
+        while (!hal_atomic_cas(&x86_lock_val, 1, 0)) {
+                /* wait */
+        }
+}
+
+/* -------------------------------------------------------------------------- */
+
 void x86_panic(char *msg)
 {
+        x86_lock();
         x86_printf("!!!!! PANIC !!!!!\n");
         x86_printf("-> %s\n", msg);
         x86_printf("!!!!!!!!!!!!!!!!!\n");
+        x86_unlock();
         while (1);
 }