X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=EdkModulePkg%2FBus%2FPci%2FPciBus%2FDxe%2FPciCommand.h;h=e63d0d15254b0c460d94a81ff31a80e92d062563;hp=56f632e8da4b7dda4066aa1356587a762e4c5f0d;hb=c51cec25606163ee3cc478f5d4598227558195c5;hpb=db0e690675ba50c2463c47e4811227e56c4858d9

diff --git a/EdkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.h b/EdkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.h
index 56f632e8da..e63d0d1525 100644
--- a/EdkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.h
+++ b/EdkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.h
@@ -24,6 +24,47 @@ Revision History
 #ifndef _EFI_PCI_COMMAND_H
 #define _EFI_PCI_COMMAND_H
 
+//
+// The PCI Command register bits owned by PCI Bus driver.
+//
+// They should be cleared at the beginning. The other registers
+// are owned by chipset, we should not touch them.
+//
+#define EFI_PCI_COMMAND_BITS_OWNED                          ( \
+                EFI_PCI_COMMAND_IO_SPACE                    | \
+                EFI_PCI_COMMAND_MEMORY_SPACE                | \
+                EFI_PCI_COMMAND_BUS_MASTER                  | \
+                EFI_PCI_COMMAND_MEMORY_WRITE_AND_INVALIDATE | \
+                EFI_PCI_COMMAND_VGA_PALETTE_SNOOP           | \
+                EFI_PCI_COMMAND_FAST_BACK_TO_BACK             \
+                )
+
+//
+// The PCI Bridge Control register bits owned by PCI Bus driver.
+// 
+// They should be cleared at the beginning. The other registers
+// are owned by chipset, we should not touch them.
+//
+#define EFI_PCI_BRIDGE_CONTROL_BITS_OWNED                   ( \
+                EFI_PCI_BRIDGE_CONTROL_ISA                  | \
+                EFI_PCI_BRIDGE_CONTROL_VGA                  | \
+                EFI_PCI_BRIDGE_CONTROL_VGA_16               | \
+                EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK      \
+                )
+
+//
+// The PCCard Bridge Control register bits owned by PCI Bus driver.
+// 
+// They should be cleared at the beginning. The other registers
+// are owned by chipset, we should not touch them.
+//
+#define EFI_PCCARD_BRIDGE_CONTROL_BITS_OWNED                ( \
+                EFI_PCI_BRIDGE_CONTROL_ISA                  | \
+                EFI_PCI_BRIDGE_CONTROL_VGA                  | \
+                EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK      \
+                )
+
+
 #define EFI_GET_REGISTER      1
 #define EFI_SET_REGISTER      2
 #define EFI_ENABLE_REGISTER   3