Changeset 133 for trunk/src/os2ahci/os2ahci.c

Timestamp:

May 16, 2012, 10:19:24 AM (13 years ago)

Author:

Markus Thielen

Message:

• (#13) added IDC entry point to allow switching back to BIOS mode
• added IDCTEST driver and program for testing the IDC entry point
• fixed bug in IOCTL handling (missing 'break')

File:

• trunk/src/os2ahci/os2ahci.c (modified) (3 diffs)

trunk/src/os2ahci/os2ahci.c

@@ -124 +124 @@
  * for initialization purposes; all other calls go directly to the adapter
  * device driver's strategy function.
+ *
+ * NOTE: this is also used as the IDC entry point. We expect an IOCTL request
+ *       packet for IDC calls, so they can be handled by gen_ioctl.
  */
 USHORT _cdecl c_strat(RPH _far *req)
@@ -247 +250 @@
       case 'r':
         /* reset ports during initialization */
-        init_reset = 1;
+        init_reset = 1;
         break;
 
@@ -427 +430 @@
 
     }
+    break;
+
+  case OS2AHCI_IDC_CATEGORY:
+    switch (ioctl->Function) {
+
+    case OS2AHCI_IDC_BIOSMODE:
+      /* reconfigure adapters in BIOS/int13 mode; needed for generating 
+       * trap dumps on some machines. This is called by ACPI.PSD.
+       *
+       * To enter BIOS mode, we flush all write caches, turn off interrupts
+       * and restore the BIOS configuration. This is exactly what 
+       * apm_suspend() does.
+       */
+      apm_suspend();
+      return(STDON);
+
+    case OS2AHCI_IDC_BEEP:
+      /* IOCTL for IDC testing - just beep */
+      DevHelp_Beep(2000, 100);
+      return(STDON);
+    }
+    break;
 
   case DSKSP_CAT_GENERIC: