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1.Overview

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2.General SROM Format

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3.SROM Board Information

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4.Magic Packet information block

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5. Single function ID Block

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6. Dual function ID Block

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6.1 Func1_HwOptions (offset 14d)

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MiscHwOptions (offset 15d)

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Func0_HwOptions (offset 17d)

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7. CONTROLLER INFO LEAF

7.1 Introduction

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7.2 21041 INFO LEAF

7.2.1 21041 Info Leaf Format

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7.2.2 21041 Media Block Format

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7.3 21140 Info Leaf

7.3.1 21140 Info Leaf Format

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7.3.2 21140 Info Block Format

7.3.2.1 21140 Compact Format

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7.3.2.2 21140 Extended Format

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7.3.2.2.1 21140 Extended Format - Block Type 0

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7.3.2.2.2 21140 Extended Format - Block Type 1

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7.3.2.2.3 21140 Extended Format - Block Type 5

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7.4 21142 Info Leaf

7.4.1 21142 Info Leaf Format

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7.4.2 21142 Info Block Format

7.4.2.1.1 21142 Extended Format - Block Type 2

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7.4.2.1.2 21142 Extended Format - Block Type 3

7.4.2.1.3 21142 Extended Format - Block Type 5

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7.5 21143 Info Leaf

7.5.1 21143 Info Leaf Format

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7.5.2 21143 Info Block Format

7.5.2.1.1 21143 Extended Format - Block Type 2

7.5.2.1.2 21143 Extended Format - Block Type 3

7.5.2.1.3 21143 Extended Format - Block Type 4

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7.5.2.1.4 21143 Extended Format - Block Type 5

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7.5.2.1.5 21143 (Rev 4.1 and Above) Extended Format - Block Type 6

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unsigned short CalcSromCrc(unsigned char *SromData);

#define  DATA_LEN        126// 1024 bits SROM

struct {
unsigned char  SromData[DATA_LEN];
unsigned short SromCRC;
} Srom;
main()
{
Srom.SromCRC = CalcSromCrc(&Srom.SromData);
}

unsigned short CalcSromCrc(unsigned char *SromData)
{
#define POLY 0x04C11DB6L

   unsigned long crc = 0xFFFFFFFF;
   unsigned long FlippedCRC = 0;

   unsigned char CurrentByte;
   unsigned Index;
   unsigned Bit;
   unsigned Msb;
   int i;

   for (Index = 0; Index < DATA_LEN; Index++)
   {
      CurrentByte = SromData[Index];

      for (Bit = 0; Bit < 8; Bit++)
      {
         Msb = (crc >> 31) & 1;
         crc <<= 1;

         if (Msb ^ (CurrentByte & 1))
         {
            crc ^= POLY;
            crc |= 0x00000001;
         }

         CurrentByte >>= 1;
      }
   }

   for (i = 0; i < 32; i++)
   {
      FlippedCRC <<= 1;
      Bit = crc & 1;
      crc >>= 1;
      FlippedCRC += Bit;
  }
   crc = FlippedCRC ^ 0xFFFFFFFF;
   return (crc & 0xFFFF);
}

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/*
** This program calculates the CRC which sums the Serial ROM ID Block header and the Magic
** Information Block.
** In the case of the ID Block header, this serial ROM header of 9 words is read upon reset of
** the chip. If the CRC result of these 9 words equals 0, it means the data has
** been read correctly.
** In the case of the Magic info block, this data is read by the chip upon entering
** Magic mode. If the CRC result of these 16 words is equal zero, it means the
** data has been read correctly and the chip can enter Magic mode.
**               
** CRC is an 8 bit crc. Polynom is

¹  + 1 .
** Note that contrary to a regular CRC, this CRC is calculated on the data stream
** from MSB 1'st to LSB. This is due to the nature of the SROM data stream
** which flows in this manner.
**
** Predefined SROM header:
**
**    WORD#Meaning
**    -----------         -----------
**      0       Subsystem vendor ID
**      1       Subsystem ID
**      2       CIS pointer LOW word
**      3       CIS pointer HIGH word
**      4       reserved (value = 0)
**      5       reserved (value = 0)
**      6       reserved (value = 0)
**      7       reserved (value = 0)
**      8       High byte is reserved (value = 0), Low byte = CRC
**
** Predefined Magic block:
**
**    WORD#Meaning
**    -----------         -----------
**      0       reserved (value = 0)
**      1       reserved (value = 0)
**      2     reserved (value = 0)
**      3      WOL IEEE addr low word
**      4      WOL IEEE addr middle word
**      5      WOL IEEE addr high word
**      6      WOL Command word
**      7       reserved (value = 0)
**      8       reserved (value = 0)
**      9       reserved (value = 0)
**    10       reserved (value = 0)
**    11       reserved (value = 0)
**    12       reserved (value = 0)
**    13       reserved (value = 0)
**    14       reserved (value = 0)
**    15       High byte is reserved (value = 0), Low byte = CRC
*/

main()
{
#define POLY 0x6

#define LEN 9 /* for ID Block */
#define LEN 16/* for WOL block */

  unsigned short DAT[LEN];

  int i,Word,n;
  char Bit;
  unsigned char BitVal;
  unsigned char crc;

  n=0;
  crc = -1;

  for (Word=0; Word<LEN; Word++)
  for (Bit=15; Bit>=0; Bit--)
      {

if ((Word == (LEN-1)) && (Bit == 7))
   {
    /*
    ** Insert the correct CRC result into input data stream in place.
    */
    DAT[LEN-1] = (DAT[LEN-1] & 0xff00) | (unsigned short)crc;
    break;
   }

n++;

BitVal = ((DAT[Word] >> Bit) & 1) ^ ((crc >> 7) & 1);
crc = crc << 1;
if (BitVal == 1)
   {
    crc ^= POLY;
    crc |= 0x01;
   }
      }

Appendix C - CIS pointer setting from SROM

CIS Pointer Layout (located in PCI config space)

The Address Space Indicator values can be one of two:
*2 - CIS data is stored in SROM
*7 - CIS data is stored in BOOT ROM

CIS data stored in SROM  (Address Space Indicator = 2)

CIS Pointer register (located in PCI configuration space of Ethernet function) layout - SROM application

Note:SROM CIS Pointer Low bits 7:3 are MBZ.

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Calculating the value of the CIS pointer field  for CIS in SROM

Assume we want to locate the Ethernet CIS block at byte address 90h in the SROM and the Modem CIS block at byte address 128h (both 90h and 128h are above the 80h size of the board info).

Ethernet CIS block Offset within the SROM=     90h
SROM Offset from CBMA=   200h

Ethernet CIS block offset from CBMA=    290h

Configuration Space CIS pointer for Ethernet CIS block:
Offset = 290h  = 0000 0000 0000 0000 0000 0010 1001 0000
SROM indicator:                                                               010
The pointer:0000 0000 0000 0000 0000 0010 1001 0010
Bits<10:3>:                                               010 1001 0


Modem CIS block Offset within the SROM=   128h
SROM Offset from CBMA=   200h

Modem CIS block offset from CBMA      =   328h

Configuration Space CIS pointer for Modem CIS block:
Offset = 328h  = 0000 0000 0000 0000 0000 0011 0010 1000
SROM indicator:                                                               010
The pointer:0000 0000 0000 0000 0000 0011 0010 1010
Bits<10:3>:                                               011 0010 1

The SROM CIS Pointer field:
     0          0            6   |    5    |         5   |    2     |       0  |       2
0000     0000      011 0010 1        010 1001 0      00000       010        =    00655202h
MBZ    MBZ     Modem CIS      Ethernet CIS       MBZ     SROM

The SROM CIS field the indicates that the Ethernet CIS block is at offset 90h in the SROM and the Modem CIS block is at offset 128h in the SROM is: 00655202h.

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CIS data stored in BOOT ROM  (Address Space Indicator = 7)

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Document converted from ms word 8 by MSWordView(wv ver 0.5.16)
MSWordView written by Caolan McNamara