BIOS-new

Timestamp:

Oct 14, 2011 1:48:03 PM (13 years ago)

Author:

vboxsync

Message:

DMA recompiler bug workaround for floppy, too.

Location:

trunk/src/VBox/Devices/PC/BIOS-new

Files:

trunk/src/VBox/Devices/PC/BIOS-new/ahci.c

-              r38899
+              r38997
 #define AHCI_MAX_STORAGE_DEVICES 4
-/* Because we don't tell the recompiler when guest's physical memory
- * is written, it can incorrectly cache guest code overwritten by
- * bus master DMA. We just re-write the memory block to flush any of
- * its caches. This is not exactly efficient, but works!
- */
-#define DMA_WORKAROUND      1
 /* Number of S/G table entries in EDDS. */

-              r38833
+              r38997
 #define BX_PANIC(...)   bios_printf(BIOS_PRINTF_DEBHALT, __VA_ARGS__)
+/* Because we don't tell the recompiler when guest physical memory
+ * is written, it can incorrectly cache guest code overwritten by
+ * DMA (bus master or not). We just re-write the memory block to flush
+ * any of its caches. This is not exactly efficient, but works!
+ */
+#define DMA_WORKAROUND      1
 /* Random hardware-related definitions. */

-              r38699
+              r38997
                 return;
+            }
+#ifdef DMA_WORKAROUND
+            rep_movsw(ES :> BX, ES :> BX, num_sectors * 512 / 2);
+#endif
             // ??? should track be new val from return_status[3] ?
             set_diskette_current_cyl(drive, track);

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