The reasons for the changes made are:

[mirror_edk2.git] / EdkModulePkg / Bus / Pci / PciBus / Dxe / PciCommand.h

diff --git a/EdkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.h b/EdkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.h
index 56f632e8da4b7dda4066aa1356587a762e4c5f0d..e63d0d15254b0c460d94a81ff31a80e92d062563 100644 (file)
--- 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\r
 #define _EFI_PCI_COMMAND_H\r
 \r
+//\r
+// The PCI Command register bits owned by PCI Bus driver.\r
+//\r
+// They should be cleared at the beginning. The other registers\r
+// are owned by chipset, we should not touch them.\r
+//\r
+#define EFI_PCI_COMMAND_BITS_OWNED                          ( \\r
+                EFI_PCI_COMMAND_IO_SPACE                    | \\r
+                EFI_PCI_COMMAND_MEMORY_SPACE                | \\r
+                EFI_PCI_COMMAND_BUS_MASTER                  | \\r
+                EFI_PCI_COMMAND_MEMORY_WRITE_AND_INVALIDATE | \\r
+                EFI_PCI_COMMAND_VGA_PALETTE_SNOOP           | \\r
+                EFI_PCI_COMMAND_FAST_BACK_TO_BACK             \\r
+                )\r
+\r
+//\r
+// The PCI Bridge Control register bits owned by PCI Bus driver.\r
+// \r
+// They should be cleared at the beginning. The other registers\r
+// are owned by chipset, we should not touch them.\r
+//\r
+#define EFI_PCI_BRIDGE_CONTROL_BITS_OWNED                   ( \\r
+                EFI_PCI_BRIDGE_CONTROL_ISA                  | \\r
+                EFI_PCI_BRIDGE_CONTROL_VGA                  | \\r
+                EFI_PCI_BRIDGE_CONTROL_VGA_16               | \\r
+                EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK      \\r
+                )\r
+\r
+//\r
+// The PCCard Bridge Control register bits owned by PCI Bus driver.\r
+// \r
+// They should be cleared at the beginning. The other registers\r
+// are owned by chipset, we should not touch them.\r
+//\r
+#define EFI_PCCARD_BRIDGE_CONTROL_BITS_OWNED                ( \\r
+                EFI_PCI_BRIDGE_CONTROL_ISA                  | \\r
+                EFI_PCI_BRIDGE_CONTROL_VGA                  | \\r
+                EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK      \\r
+                )\r
+\r
+\r
 #define EFI_GET_REGISTER      1\r
 #define EFI_SET_REGISTER      2\r
 #define EFI_ENABLE_REGISTER   3\r