drivers/platform/x86/dell-smbios.h

   1 /*
   2  *  Common functions for kernel modules using Dell SMBIOS
   3  *
   4  *  Copyright (c) Red Hat <mjg@redhat.com>
   5  *  Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
   6  *  Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
   7  *
   8  *  Based on documentation in the libsmbios package:
   9  *  Copyright (C) 2005-2014 Dell Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  */
  15
  16 #ifndef _DELL_SMBIOS_H_
  17 #define _DELL_SMBIOS_H_
  18
  19 /* This structure will be modified by the firmware when we enter
  20  * system management mode, hence the volatiles */
  21
  22 struct calling_interface_buffer {
  23         u16 class;
  24         u16 select;
  25         volatile u32 input[4];
  26         volatile u32 output[4];
  27 } __packed;
  28
  29 struct calling_interface_token {
  30         u16 tokenID;
  31         u16 location;
  32         union {
  33                 u16 value;
  34                 u16 stringlength;
  35         };
  36 };
  37
  38 extern struct calling_interface_buffer *buffer;
  39 extern struct calling_interface_token *da_tokens;
  40
  41 void dell_smbios_get_buffer(void);
  42 void dell_smbios_clear_buffer(void);
  43 void release_buffer(void);
  44 struct calling_interface_buffer *
  45 dell_send_request(struct calling_interface_buffer *buffer,
  46                   int class, int select);
  47
  48 int find_token_id(int tokenid);
  49 int find_token_location(int tokenid);
  50 #endif