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Functions
ARC_STATUS	RamDiskInitialize (IN BOOLEAN InitRamDisk, IN PCSTR LoadOptions OPTIONAL, IN PCSTR DefaultPath OPTIONAL)

Variables
PVOID	gInitRamDiskBase

ULONG	gInitRamDiskSize

Function Documentation

◆ RamDiskInitialize()

ARC_STATUS RamDiskInitialize	(	IN BOOLEAN	InitRamDisk,
		IN PCSTR LoadOptions	OPTIONAL,
		IN PCSTR DefaultPath	OPTIONAL
	)

Definition at line 229 of file ramdisk.c.

{
    TRACE("RamDiskInitialize(%s, '%s', '%s')\n",
          InitRamDisk ? "INIT" : "REGULAR",
          LoadOptions ? LoadOptions : "n/a",
          DefaultPath ? DefaultPath : "n/a");
 
    /* Reset the RAMDISK device */
    if ((RamDiskBase != gInitRamDiskBase) &&
        (RamDiskFileSize != gInitRamDiskSize) &&
        (gInitRamDiskSize != 0))
    {
        /* This is not the initial Ramdisk, so we can free the allocated memory */
        MmFreeMemory(RamDiskBase);
    }
    RamDiskBase = NULL;
    RamDiskFileSize = 0;
    RamDiskImageLength = 0;
    RamDiskImageOffset = 0;
    RamDiskOffset = 0;
 
    if (InitRamDisk)
    {
        /* We initialize the initial Ramdisk: it should be present in memory */
        if (!gInitRamDiskBase || gInitRamDiskSize == 0)
            return ENODEV;
 
        // TODO: Handle SDI image.
 
        RamDiskBase = gInitRamDiskBase;
        RamDiskFileSize = gInitRamDiskSize;
        ASSERT(RamDiskFileSize < 0x100000000); // See FIXME about 4GB support in RamDiskLoadVirtualFile().
    }
    else
    {
        /* We initialize the Ramdisk from the load options */
        ARC_STATUS Status;
        CHAR FileName[MAX_PATH] = "";
 
        /* If we don't have any load options, initialize an empty Ramdisk */
        if (LoadOptions)
        {
            PCSTR Option;
            ULONG FileNameLength;
 
            /* Ramdisk image file name */
            Option = NtLdrGetOptionEx(LoadOptions, "RDPATH=", &FileNameLength);
            if (Option && (FileNameLength > 7))
            {
                /* Copy the file name */
                Option += 7; FileNameLength -= 7;
                RtlStringCbCopyNA(FileName, sizeof(FileName),
                                  Option, FileNameLength * sizeof(CHAR));
            }
 
            /* Ramdisk image length */
            Option = NtLdrGetOption(LoadOptions, "RDIMAGELENGTH=");
            if (Option)
            {
                RamDiskImageLength = _atoi64(Option + 14);
            }
 
            /* Ramdisk image offset */
            Option = NtLdrGetOption(LoadOptions, "RDIMAGEOFFSET=");
            if (Option)
            {
                RamDiskImageOffset = atol(Option + 14);
            }
        }
 
        if (*FileName)
            Status = RamDiskLoadVirtualFile(FileName, DefaultPath);
        else
            Status = RamDiskLoadVirtualFile(DefaultPath, NULL);
        if (Status != ESUCCESS)
            return Status;
    }
 
    /* Adjust the Ramdisk image length if needed */
    if (!RamDiskImageLength || (RamDiskImageLength > RamDiskFileSize - RamDiskImageOffset))
        RamDiskImageLength = RamDiskFileSize - RamDiskImageOffset;
 
    /* Register the RAMDISK device */
    if (!RamDiskDeviceRegistered)
    {
        FsRegisterDevice("ramdisk(0)", &RamDiskVtbl);
        RamDiskDeviceRegistered = TRUE;
    }
 
    return ESUCCESS;
}

Referenced by ArmHwDetect(), LoadAndBootWindows(), and LoadReactOSSetup().

Variable Documentation

◆ gInitRamDiskBase

PVOID gInitRamDiskBase

extern

Definition at line 20 of file ramdisk.c.

Referenced by CmdLineParse(), and RamDiskInitialize().

◆ gInitRamDiskSize

ULONG gInitRamDiskSize