drivers/net/myri10ge/myri10ge_mcp_gen_header.h

   1 #ifndef __MYRI10GE_MCP_GEN_HEADER_H__
   2 #define __MYRI10GE_MCP_GEN_HEADER_H__
   3
   4 /* this file define a standard header used as a first entry point to
   5  * exchange information between firmware/driver and driver.  The
   6  * header structure can be anywhere in the mcp. It will usually be in
   7  * the .data section, because some fields needs to be initialized at
   8  * compile time.
   9  * The 32bit word at offset MX_HEADER_PTR_OFFSET in the mcp must
  10  * contains the location of the header.
  11  *
  12  * Typically a MCP will start with the following:
  13  * .text
  14  * .space 52    ! to help catch MEMORY_INT errors
  15  * bt start     ! jump to real code
  16  * nop
  17  * .long _gen_mcp_header
  18  *
  19  * The source will have a definition like:
  20  *
  21  * mcp_gen_header_t gen_mcp_header = {
  22  * .header_length = sizeof(mcp_gen_header_t),
  23  * .mcp_type = MCP_TYPE_XXX,
  24  * .version = "something $Id: mcp_gen_header.h,v 1.2 2006/05/13 10:04:35 bgoglin Exp $",
  25  * .mcp_globals = (unsigned)&Globals
  26  * };
  27  */
  28
  29 #define MCP_HEADER_PTR_OFFSET  0x3c
  30
  31 #define MCP_TYPE_MX 0x4d582020  /* "MX  " */
  32 #define MCP_TYPE_PCIE 0x70636965        /* "PCIE" pcie-only MCP */
  33 #define MCP_TYPE_ETH 0x45544820 /* "ETH " */
  34 #define MCP_TYPE_MCP0 0x4d435030        /* "MCP0" */
  35
  36 struct mcp_gen_header {
  37         /* the first 4 fields are filled at compile time */
  38         unsigned header_length;
  39         __be32 mcp_type;
  40         char version[128];
  41         unsigned mcp_globals;   /* pointer to mcp-type specific structure */
  42
  43         /* filled by the MCP at run-time */
  44         unsigned sram_size;
  45         unsigned string_specs;  /* either the original STRING_SPECS or a superset */
  46         unsigned string_specs_len;
  47
  48         /* Fields above this comment are guaranteed to be present.
  49          *
  50          * Fields below this comment are extensions added in later versions
  51          * of this struct, drivers should compare the header_length against
  52          * offsetof(field) to check wether a given MCP implements them.
  53          *
  54          * Never remove any field.  Keep everything naturally align.
  55          */
  56 };
  57
  58 #endif                          /* __MYRI10GE_MCP_GEN_HEADER_H__ */