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100 lines
3.7 KiB
C
100 lines
3.7 KiB
C
/*******************************************************************************
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SPDX-License-Identifier: BSD-2-Clause
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Copyright (c) 2006-2007, Myricom Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Neither the name of the Myricom Inc, nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***************************************************************************/
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#ifndef _mcp_gen_header_h
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#define _mcp_gen_header_h
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/* this file define a standard header used as a first entry point to
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exchange information between firmware/driver and driver. The
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header structure can be anywhere in the mcp. It will usually be in
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the .data section, because some fields needs to be initialized at
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compile time.
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The 32bit word at offset MX_HEADER_PTR_OFFSET in the mcp must
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contains the location of the header.
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Typically a MCP will start with the following:
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.text
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.space 52 ! to help catch MEMORY_INT errors
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bt start ! jump to real code
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nop
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.long _gen_mcp_header
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The source will have a definition like:
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mcp_gen_header_t gen_mcp_header = {
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.header_length = sizeof(mcp_gen_header_t),
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.mcp_type = MCP_TYPE_XXX,
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.version = "something $Id: mcp_gen_header.h,v 1.1 2005/12/23 02:10:44 gallatin Exp $",
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.mcp_globals = (unsigned)&Globals
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};
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*/
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#define MCP_HEADER_PTR_OFFSET 0x3c
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#define MCP_TYPE_MX 0x4d582020 /* "MX " */
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#define MCP_TYPE_PCIE 0x70636965 /* "PCIE" pcie-only MCP */
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#define MCP_TYPE_ETH 0x45544820 /* "ETH " */
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#define MCP_TYPE_MCP0 0x4d435030 /* "MCP0" */
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typedef struct mcp_gen_header {
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/* the first 4 fields are filled at compile time */
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unsigned header_length;
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unsigned mcp_type;
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char version[128];
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unsigned mcp_globals; /* pointer to mcp-type specific structure */
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/* filled by the MCP at run-time */
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unsigned sram_size;
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unsigned string_specs; /* either the original STRING_SPECS or a superset */
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unsigned string_specs_len;
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/* Fields above this comment are guaranteed to be present.
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Fields below this comment are extensions added in later versions
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of this struct, drivers should compare the header_length against
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offsetof(field) to check wether a given MCP implements them.
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Never remove any field. Keep everything naturally align.
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*/
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} mcp_gen_header_t;
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/* Macro to create a simple mcp header */
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#define MCP_GEN_HEADER_DECL(type, version_str, global_ptr) \
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struct mcp_gen_header mcp_gen_header = { \
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sizeof (struct mcp_gen_header), \
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(type), \
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version_str, \
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(global_ptr), \
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SRAM_SIZE, \
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(unsigned int) STRING_SPECS, \
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256 \
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}
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#endif /* _mcp_gen_header_h */
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