Changeset 71218 in vbox for trunk/src/VBox/Devices

Timestamp:

Mar 5, 2018 9:19:35 PM (7 years ago)

Author:

vboxsync

Message:

DevDMA: Handle I/O port access from ring-0 and raw-mode since we handle port 0x80 here. Port 0x80 is used both the our BIOS and the linux kernel for I/O delay / debugging, there is no need to go to ring-3 each time it is accessed. [build fix]

File:

• trunk/src/VBox/Devices/PC/DevDMA.cpp (modified) (2 diffs)

trunk/src/VBox/Devices/PC/DevDMA.cpp

@@ -123 +123 @@
     uint8_t     u8ModeCtr;      /* Mode register counter for reads. */
     bool        fHiByte;        /* Byte pointer (T/F -> high/low). */
+    uint8_t     abPadding0[2];
     uint32_t    is16bit;        /* True for 16-bit DMA. */
+    uint8_t     abPadding1[4];
 } DMAControl;
 
@@ -132 +134 @@
     DMAControl              DMAC[2];    /* Two DMA controllers. */
     bool                    fRZEnabled;
+    uint8_t                 abPadding[7];
 } DMAState;