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268 lines
7.4 KiB
268 lines
7.4 KiB
/*
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DoUtil.c
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Contains "wrappers" for various work routines, which do TWO things:
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A. Make the semantics friendly the calling program.
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B. Make it easy to move from Win2k to some emulator to a real EFI box.
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*/
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#include "diskpart.h"
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INTN AllocCount = 0;
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UINT32
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GetBlockSize(
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EFI_HANDLE Handle
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)
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/*
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Return the size, in bytes, of a block. Handle is presumed to
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point to a device supporting Block IO protocol.
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return's 0 if some error.
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*/
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{
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EFI_BLOCK_IO *BlkIo;
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status = BS->HandleProtocol(Handle, &BlockIoProtocol, &BlkIo);
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if (EFI_ERROR(status)) {
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return 0;
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}
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return (BlkIo->Media->BlockSize);
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}
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UINT64
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GetDiskSize(
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EFI_HANDLE Handle
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)
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/*
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Return the size, in blocks, of a spindle. Note that if we return X,
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this means there are blocks with LBAs = 0...(X-1)
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return 0 if some error
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*/
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{
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EFI_BLOCK_IO *BlkIo;
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status = BS->HandleProtocol(Handle, &BlockIoProtocol, &BlkIo);
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if (EFI_ERROR(status)) {
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return 0;
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}
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return (BlkIo->Media->LastBlock+1);
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}
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VOID
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DoFree(
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VOID *Buffer
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)
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/*
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If and only if Buffer != NULL, free it.
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If Buffer == NULL, do nothing and return
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*/
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{
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if (Buffer) {
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FreePool(Buffer);
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AllocCount--;
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}
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return;
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}
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VOID *
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DoAllocate(
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UINTN Size
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)
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/*
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Just allocate at least Size bytes from some heap,
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return pointer. return NULL if failure
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*/
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{
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VOID *v;
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v = AllocatePool(Size);
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if (v) {
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AllocCount++;
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}
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return v;
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}
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//
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// One source quotes this table as being from Dr Dobbs 1992.
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// Others say other things
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//
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UINT32 CRCHelpTable[256] = {
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
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0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
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0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
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0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
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0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
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0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
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0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
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0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
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0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
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0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
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0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
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0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
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0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
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0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
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0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
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0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
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0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
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0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
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0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
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0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
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0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
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0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
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0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
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0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
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0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
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0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
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0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
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0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
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0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
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0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
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0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
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0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
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0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
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0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
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0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
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0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
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0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
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0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
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0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
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0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
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0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
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0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
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0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
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};
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UINT32
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GetCRC32(
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UINT8 *Buffer,
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UINT32 Length
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)
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/*
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Compute a CRC for the Buffer data for Length bytes.
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Remember to zero out any CRC fields included in the Buffer
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and to restore them afterwards.
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*/
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{
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UINT32 Crc,i;
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Crc = 0xffffffffL;
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for (i = 0; i < Length; i++) {
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Crc = CRCHelpTable [(Crc ^ Buffer [ i ]) & 0xff] ^ (Crc >> 8);
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}
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return (Crc ^ 0xffffffffL);
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}
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EFI_GUID
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GetGUID()
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/*
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Return a GUID.
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*/
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{
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EFI_GUID Guid;
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CHAR16 Buffer[10];
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if (DebugLevel >= DEBUG_OPPROMPT) {
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Input(L"\nCreate = Enter to Continue\n", Buffer, 10);
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}
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InitGuid();
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CreateGuid(&Guid);
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if (DebugLevel >= DEBUG_OPPROMPT) {
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Input(L"\nCreate = Enter to Continue\n", Buffer, 10);
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}
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return (Guid);
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// return NullGuid; // WORK WORK!!!
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}
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EFI_STATUS
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WriteBlock(
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EFI_HANDLE DiskHandle,
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VOID *Buffer,
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UINT64 BlockAddress,
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UINT32 Size
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)
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/*
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WriteBlock - wrapper routine
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Write Size bytes from Buffer to DiskHandle at Block BlockAddress
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*/
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{
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EFI_BLOCK_IO *BlkIo = NULL;
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EFI_DISK_IO *DiskIo = NULL;
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BS->HandleProtocol(DiskHandle, &BlockIoProtocol, &BlkIo);
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BS->HandleProtocol(DiskHandle, &DiskIoProtocol, &DiskIo);
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status = DiskIo->WriteDisk(
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DiskIo,
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BlkIo->Media->MediaId,
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MultU64x32 (BlockAddress, BlkIo->Media->BlockSize),
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Size,
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Buffer
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);
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return status;
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}
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EFI_STATUS
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ReadBlock(
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EFI_HANDLE DiskHandle,
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VOID *Buffer,
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UINT64 BlockAddress,
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UINT32 Size
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)
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/*
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ReadBlock - wrapper routine.
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Caller is presumed to know the BlockSize and number of blocks
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on the device.
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Read Size bytes from BlockAddress of DiskHandle into buffer.
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Buffer had better be big enough.
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*/
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{
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EFI_DISK_IO *DiskIo = NULL;
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EFI_BLOCK_IO *BlkIo = NULL;
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BS->HandleProtocol(DiskHandle, &BlockIoProtocol, &BlkIo);
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BS->HandleProtocol(DiskHandle, &DiskIoProtocol, &DiskIo);
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status = DiskIo->ReadDisk(
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DiskIo,
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BlkIo->Media->MediaId,
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MultU64x32 (BlockAddress, BlkIo->Media->BlockSize),
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Size,
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Buffer
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);
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return status;
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}
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EFI_STATUS
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FlushBlock(
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EFI_HANDLE DiskHandle
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)
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/*
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FlushBlock - force anything we've written to make it onto the platter
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*/
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{
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EFI_BLOCK_IO *BlkIo = NULL;
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BS->HandleProtocol(DiskHandle, &BlockIoProtocol, &BlkIo);
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return BlkIo->FlushBlocks(BlkIo);
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}
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