include/asm-x86/uv/bios.h

   1 #ifndef ASM_X86__UV__BIOS_H
   2 #define ASM_X86__UV__BIOS_H
   3
   4 /*
   5  * UV BIOS layer definitions.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
  22  *  Copyright (c) Russ Anderson
  23  */
  24
  25 #include <linux/rtc.h>
  26
  27 /*
  28  * Values for the BIOS calls.  It is passed as the first * argument in the
  29  * BIOS call.  Passing any other value in the first argument will result
  30  * in a BIOS_STATUS_UNIMPLEMENTED return status.
  31  */
  32 enum uv_bios_cmd {
  33         UV_BIOS_COMMON,
  34         UV_BIOS_GET_SN_INFO,
  35         UV_BIOS_FREQ_BASE
  36 };
  37
  38 /*
  39  * Status values returned from a BIOS call.
  40  */
  41 enum {
  42         BIOS_STATUS_SUCCESS             =  0,
  43         BIOS_STATUS_UNIMPLEMENTED       = -ENOSYS,
  44         BIOS_STATUS_EINVAL              = -EINVAL,
  45         BIOS_STATUS_UNAVAIL             = -EBUSY
  46 };
  47
  48 /*
  49  * The UV system table describes specific firmware
  50  * capabilities available to the Linux kernel at runtime.
  51  */
  52 struct uv_systab {
  53         char signature[4];      /* must be "UVST" */
  54         u32 revision;           /* distinguish different firmware revs */
  55         u64 function;           /* BIOS runtime callback function ptr */
  56 };
  57
  58 enum {
  59         BIOS_FREQ_BASE_PLATFORM = 0,
  60         BIOS_FREQ_BASE_INTERVAL_TIMER = 1,
  61         BIOS_FREQ_BASE_REALTIME_CLOCK = 2
  62 };
  63
  64 /*
  65  * bios calls have 6 parameters
  66  */
  67 extern s64 uv_bios_call(enum uv_bios_cmd, u64, u64, u64, u64, u64);
  68 extern s64 uv_bios_call_irqsave(enum uv_bios_cmd, u64, u64, u64, u64, u64);
  69 extern s64 uv_bios_call_reentrant(enum uv_bios_cmd, u64, u64, u64, u64, u64);
  70
  71 extern void uv_bios_init(void);
  72
  73 extern long
  74 x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
  75                    unsigned long *drift_info);
  76
  77 #endif /* ASM_X86__UV__BIOS_H */