Kernel - Start on SHM 'driver' (and common in-memory finddir/readdir)

[tpg/acess2.git] / KernelLand / Kernel / drv / vpci.c

diff --git a/KernelLand/Kernel/drv/vpci.c b/KernelLand/Kernel/drv/vpci.c
index 4fccdb8..e4288b6 100644 (file)
--- a/KernelLand/Kernel/drv/vpci.c
+++ b/KernelLand/Kernel/drv/vpci.c
@@ -22,12 +22,14 @@ Uint32 VPCI_Read(tVPCI_Device *Dev, Uint8 Offset, Uint8 Size)
        case 0: // Vendor[0:15], Device[16:31]
                tmp_dword = (Dev->Vendor) | (Dev->Device << 16);
                break;
+       // 1: Command[0:15], Status[16:31]
        case 2: // Class Code
                tmp_dword = Dev->Class;
                break;
-       // 1: Command[0:15], Status[16:31]
        // 3: Cache Line Size, Latency Timer, Header Type, BIST
-       // 4-9: BARs
+       case 4 ... 9:   // 4-9: BARs
+               tmp_dword = Dev->BARs[ (Offset>>2) - 4 ];
+               break;
        // 10: Unused (Cardbus CIS Pointer)
        // 11: Subsystem Vendor ID, Subsystem ID
        // 12: Expansion ROM Address
@@ -35,7 +37,8 @@ Uint32 VPCI_Read(tVPCI_Device *Dev, Uint8 Offset, Uint8 Size)
        // 14: Reserved
        // 15: Interrupt Line, Interrupt Pin, Min Grant, Max Latency
        default:
-               tmp_dword = Dev->Read(Dev->Ptr, Offset >> 2);
+               if( Dev->Read )
+                       tmp_dword = Dev->Read(Dev->Ptr, Offset >> 2);
                break;
        }
 
@@ -66,7 +69,10 @@ void VPCI_Write(tVPCI_Device *Dev, Uint8 Offset, Uint8 Size, Uint32 Data)
                return ;
        }
 
-       tmp_dword = Dev->Read(Dev->Ptr, Offset>>2);
+       if( Size != 4 && Dev->Read )
+               tmp_dword = Dev->Read(Dev->Ptr, Offset>>2);
+       else
+               tmp_dword = 0;
        switch(Size)
        {
        case 4: tmp_dword = 0;  break;
@@ -80,5 +86,6 @@ void VPCI_Write(tVPCI_Device *Dev, Uint8 Offset, Uint8 Size, Uint32 Data)
                break;
        }
        tmp_dword |= Data << ((Offset&3)*8);
-       Dev->Write(Dev->Ptr, Offset>>2, tmp_dword);
+       if( Dev->Write )
+               Dev->Write(Dev->Ptr, Offset>>2, tmp_dword);
 }