arch/x86/include/asm/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) 2008-2009 Silicon Graphics, Inc.  All Rights Reserved.
  22  *  Copyright (c) Russ Anderson <rja@sgi.com>
  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         UV_BIOS_WATCHLIST_ALLOC,
  37         UV_BIOS_WATCHLIST_FREE,
  38         UV_BIOS_MEMPROTECT,
  39         UV_BIOS_GET_PARTITION_ADDR,
  40         UV_BIOS_SET_LEGACY_VGA_TARGET
  41 };
  42
  43 /*
  44  * Status values returned from a BIOS call.
  45  */
  46 enum {
  47         BIOS_STATUS_MORE_PASSES         =  1,
  48         BIOS_STATUS_SUCCESS             =  0,
  49         BIOS_STATUS_UNIMPLEMENTED       = -ENOSYS,
  50         BIOS_STATUS_EINVAL              = -EINVAL,
  51         BIOS_STATUS_UNAVAIL             = -EBUSY
  52 };
  53
  54 /*
  55  * The UV system table describes specific firmware
  56  * capabilities available to the Linux kernel at runtime.
  57  */
  58 struct uv_systab {
  59         char signature[4];      /* must be "UVST" */
  60         u32 revision;           /* distinguish different firmware revs */
  61         u64 function;           /* BIOS runtime callback function ptr */
  62 };
  63
  64 enum {
  65         BIOS_FREQ_BASE_PLATFORM = 0,
  66         BIOS_FREQ_BASE_INTERVAL_TIMER = 1,
  67         BIOS_FREQ_BASE_REALTIME_CLOCK = 2
  68 };
  69
  70 union partition_info_u {
  71         u64     val;
  72         struct {
  73                 u64     hub_version     :  8,
  74                         partition_id    : 16,
  75                         coherence_id    : 16,
  76                         region_size     : 24;
  77         };
  78 };
  79
  80 enum uv_memprotect {
  81         UV_MEMPROT_RESTRICT_ACCESS,
  82         UV_MEMPROT_ALLOW_AMO,
  83         UV_MEMPROT_ALLOW_RW
  84 };
  85
  86 /*
  87  * bios calls have 6 parameters
  88  */
  89 extern s64 uv_bios_call(enum uv_bios_cmd, u64, u64, u64, u64, u64);
  90 extern s64 uv_bios_call_irqsave(enum uv_bios_cmd, u64, u64, u64, u64, u64);
  91 extern s64 uv_bios_call_reentrant(enum uv_bios_cmd, u64, u64, u64, u64, u64);
  92
  93 extern s64 uv_bios_get_sn_info(int, int *, long *, long *, long *, long *);
  94 extern s64 uv_bios_freq_base(u64, u64 *);
  95 extern int uv_bios_mq_watchlist_alloc(unsigned long, unsigned int,
  96                                         unsigned long *);
  97 extern int uv_bios_mq_watchlist_free(int, int);
  98 extern s64 uv_bios_change_memprotect(u64, u64, enum uv_memprotect);
  99 extern s64 uv_bios_reserved_page_pa(u64, u64 *, u64 *, u64 *);
 100 extern int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus);
 101
 102 extern void uv_bios_init(void);
 103
 104 extern unsigned long sn_rtc_cycles_per_second;
 105 extern int uv_type;
 106 extern long sn_partition_id;
 107 extern long sn_coherency_id;
 108 extern long sn_region_size;
 109 extern long system_serial_number;
 110 #define partition_coherence_id()        (sn_coherency_id)
 111
 112 extern struct kobject *sgi_uv_kobj;     /* /sys/firmware/sgi_uv */
 113
 114 #endif /* _ASM_X86_UV_BIOS_H */