Changeset 203 for trunk/hal/x86_64/core/hal_init.c

Timestamp:

Jul 13, 2017, 3:24:38 PM (7 years ago)

Author:

max@…

Message:

start moving the APIC code into the PIC driver

File:

• trunk/hal/x86_64/core/hal_init.c (modified) (4 diffs)

trunk/hal/x86_64/core/hal_init.c

@@ -419 +419 @@
 /* -------------------------------------------------------------------------- */
 
+struct {
+        bool_t busy[256];
+} idt_bitmap __in_kdata;
+
+int idt_slot_alloc()
+{
+        size_t i;
+
+        for (i = 0; i < 256; i++) {
+                if (!idt_bitmap.busy[i])
+                        break;
+        }
+        if (i == 256) {
+                return -1;
+        }
+
+        idt_bitmap.busy[i] = true;
+        return (int)i;
+}
+
+void idt_slot_free(int slot)
+{
+        idt_bitmap.busy[slot] = false;
+}
+
 static void
 idt_set_seg(struct idt_seg *seg, void *func, int ist, int type, int dpl, int sel)
@@ -441 +466 @@
         size_t i;
 
+        memset(&idt_bitmap, 0, sizeof(idt_bitmap));
         idt = (struct idt_seg *)&idtstore;
 
@@ -453 +479 @@
                 idt_set_seg(&idt[i], (void *)x86_traps[i - CPUVEC_MIN], 0,
                     SDT_SYS386IGT, SEL_KPL, GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL));
+                idt_bitmap.busy[i] = true;
         }
 
@@ -459 +486 @@
                 idt_set_seg(&idt[i], (void *)x86_intrs[i - DYNVEC_MIN], 0,
                     SDT_SYS386IGT, SEL_KPL, GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL));
+                idt_bitmap.busy[i] = true;
         }
 }