vgabios: Hook up Cirrus extended bios functions.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/vgasrc/clext.c b/vgasrc/clext.c
index 835d809..9bd424e 100644
--- a/vgasrc/clext.c
+++ b/vgasrc/clext.c
@@ -452,7 +452,7 @@
  ****************************************************************/
 
 static void
-cirrus_extbios_80h(struct bregs *regs)
+clext_101280(struct bregs *regs)
 {
     u16 crtc_addr = stdvga_get_crtc();
     outb(0x27, crtc_addr);
@@ -470,14 +470,14 @@
 }
 
 static void
-cirrus_extbios_81h(struct bregs *regs)
+clext_101281(struct bregs *regs)
 {
     // XXX
     regs->ax = 0x0100;
 }
 
 static void
-cirrus_extbios_82h(struct bregs *regs)
+clext_101282(struct bregs *regs)
 {
     u16 crtc_addr = stdvga_get_crtc();
     outb(0x27, crtc_addr);
@@ -486,13 +486,13 @@
 }
 
 static void
-cirrus_extbios_85h(struct bregs *regs)
+clext_101285(struct bregs *regs)
 {
     regs->al = cirrus_get_memsize();
 }
 
 static void
-cirrus_extbios_9Ah(struct bregs *regs)
+clext_10129a(struct bregs *regs)
 {
     regs->ax = 0x4060;
     regs->cx = 0x1132;
@@ -507,7 +507,7 @@
     "retf");
 
 static void
-cirrus_extbios_A0h(struct bregs *regs)
+clext_1012a0(struct bregs *regs)
 {
     struct cirrus_mode_s *table_g = cirrus_get_modeentry(regs->al & 0x7f);
     regs->ah = (table_g ? 1 : 0);
@@ -516,38 +516,43 @@
 }
 
 static void
-cirrus_extbios_A1h(struct bregs *regs)
+clext_1012a1(struct bregs *regs)
 {
     regs->bx = 0x0e00; // IBM 8512/8513, color
 }
 
 static void
-cirrus_extbios_A2h(struct bregs *regs)
+clext_1012a2(struct bregs *regs)
 {
     regs->al = 0x07; // HSync 31.5 - 64.0 kHz
 }
 
 static void
-cirrus_extbios_AEh(struct bregs *regs)
+clext_1012ae(struct bregs *regs)
 {
     regs->al = 0x01; // High Refresh 75Hz
 }
 
-void
-cirrus_extbios(struct bregs *regs)
+static void
+clext_1012XX(struct bregs *regs)
 {
-    // XXX - regs->bl < 0x80 or > 0xaf call regular handlers.
+    debug_stub(regs);
+}
+
+void
+clext_1012(struct bregs *regs)
+{
     switch (regs->bl) {
-    case 0x80: cirrus_extbios_80h(regs); break;
-    case 0x81: cirrus_extbios_81h(regs); break;
-    case 0x82: cirrus_extbios_82h(regs); break;
-    case 0x85: cirrus_extbios_85h(regs); break;
-    case 0x9a: cirrus_extbios_9Ah(regs); break;
-    case 0xa0: cirrus_extbios_A0h(regs); break;
-    case 0xa1: cirrus_extbios_A1h(regs); break;
-    case 0xa2: cirrus_extbios_A2h(regs); break;
-    case 0xae: cirrus_extbios_AEh(regs); break;
-    default: break;
+    case 0x80: clext_101280(regs); break;
+    case 0x81: clext_101281(regs); break;
+    case 0x82: clext_101282(regs); break;
+    case 0x85: clext_101285(regs); break;
+    case 0x9a: clext_10129a(regs); break;
+    case 0xa0: clext_1012a0(regs); break;
+    case 0xa1: clext_1012a1(regs); break;
+    case 0xa2: clext_1012a2(regs); break;
+    case 0xae: clext_1012ae(regs); break;
+    default:   clext_1012XX(regs); break;
     }
 }
 
diff --git a/vgasrc/clext.h b/vgasrc/clext.h
index f337b65..a14cf13 100644
--- a/vgasrc/clext.h
+++ b/vgasrc/clext.h
@@ -1,11 +1,13 @@
 #ifndef __CLEXT_H
 #define __CLEXT_H
 
-#include "types.h" // u8
+#include "types.h" // u16
 
 struct vgamode_s *clext_find_mode(int mode);
 int clext_set_mode(int mode, int flags);
 void clext_list_modes(u16 seg, u16 *dest, u16 *last);
 int clext_init(void);
+struct bregs;
+void clext_1012(struct bregs *regs);
 
 #endif // clext.h
diff --git a/vgasrc/vgabios.c b/vgasrc/vgabios.c
index f351107..8ab5baa 100644
--- a/vgasrc/vgabios.c
+++ b/vgasrc/vgabios.c
@@ -18,9 +18,7 @@
 #include "optionroms.h" // struct pci_data
 #include "config.h" // CONFIG_*
 #include "stdvga.h" // stdvga_set_cursor_shape
-#include "geodevga.h" // geodevga_init
-#include "bochsvga.h" // bochsvga_init
-#include "clext.h" // clext_init
+#include "clext.h" // clext_1012
 #include "vgahw.h" // vgahw_set_mode
 
 // XXX
@@ -942,6 +940,11 @@
 static void
 handle_1012(struct bregs *regs)
 {
+    if (CONFIG_VGA_CIRRUS && regs->bl >= 0x80) {
+        clext_1012(regs);
+        return;
+    }
+
     switch (regs->bl) {
     case 0x10: handle_101210(regs); break;
     case 0x30: handle_101230(regs); break;
@@ -953,8 +956,6 @@
     case 0x36: handle_101236(regs); break;
     default:   handle_1012XX(regs); break;
     }
-
-    // XXX - cirrus has 1280, 1281, 1282, 1285, 129a, 12a0, 12a1, 12a2, 12ae
 }