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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 */
115