1 /*
2 * BIOS run time interface routines.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Russ Anderson
20 */
21
22 #include <linux/efi.h>
23 #include <asm/efi.h>
24 #include <linux/io.h>
25 #include <asm/uv/bios.h>
26 #include <asm/uv/uv_hub.h>
27
28 static struct uv_systab uv_systab;
29
uv_bios_call(enum uv_bios_cmd which,u64 a1,u64 a2,u64 a3,u64 a4,u64 a5)30 s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
31 {
32 struct uv_systab *tab = &uv_systab;
33
34 if (!tab->function)
35 /*
36 * BIOS does not support UV systab
37 */
38 return BIOS_STATUS_UNIMPLEMENTED;
39
40 return efi_call6((void *)__va(tab->function),
41 (u64)which, a1, a2, a3, a4, a5);
42 }
43
uv_bios_call_irqsave(enum uv_bios_cmd which,u64 a1,u64 a2,u64 a3,u64 a4,u64 a5)44 s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
45 u64 a4, u64 a5)
46 {
47 unsigned long bios_flags;
48 s64 ret;
49
50 local_irq_save(bios_flags);
51 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
52 local_irq_restore(bios_flags);
53
54 return ret;
55 }
56
uv_bios_call_reentrant(enum uv_bios_cmd which,u64 a1,u64 a2,u64 a3,u64 a4,u64 a5)57 s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
58 u64 a4, u64 a5)
59 {
60 s64 ret;
61
62 preempt_disable();
63 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
64 preempt_enable();
65
66 return ret;
67 }
68
69
70 long sn_partition_id;
71 EXPORT_SYMBOL_GPL(sn_partition_id);
72 long sn_coherency_id;
73 EXPORT_SYMBOL_GPL(sn_coherency_id);
74 long sn_region_size;
75 EXPORT_SYMBOL_GPL(sn_region_size);
76 int uv_type;
77
78
uv_bios_get_sn_info(int fc,int * uvtype,long * partid,long * coher,long * region)79 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
80 long *region)
81 {
82 s64 ret;
83 u64 v0, v1;
84 union partition_info_u part;
85
86 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
87 (u64)(&v0), (u64)(&v1), 0, 0);
88 if (ret != BIOS_STATUS_SUCCESS)
89 return ret;
90
91 part.val = v0;
92 if (uvtype)
93 *uvtype = part.hub_version;
94 if (partid)
95 *partid = part.partition_id;
96 if (coher)
97 *coher = part.coherence_id;
98 if (region)
99 *region = part.region_size;
100 return ret;
101 }
102
103 int
uv_bios_mq_watchlist_alloc(int blade,unsigned long addr,unsigned int mq_size,unsigned long * intr_mmr_offset)104 uv_bios_mq_watchlist_alloc(int blade, unsigned long addr, unsigned int mq_size,
105 unsigned long *intr_mmr_offset)
106 {
107 union uv_watchlist_u size_blade;
108 u64 watchlist;
109 s64 ret;
110
111 size_blade.size = mq_size;
112 size_blade.blade = blade;
113
114 /*
115 * bios returns watchlist number or negative error number.
116 */
117 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
118 size_blade.val, (u64)intr_mmr_offset,
119 (u64)&watchlist, 0);
120 if (ret < BIOS_STATUS_SUCCESS)
121 return ret;
122
123 return watchlist;
124 }
125 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
126
127 int
uv_bios_mq_watchlist_free(int blade,int watchlist_num)128 uv_bios_mq_watchlist_free(int blade, int watchlist_num)
129 {
130 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
131 blade, watchlist_num, 0, 0, 0);
132 }
133 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
134
135 s64
uv_bios_change_memprotect(u64 paddr,u64 len,enum uv_memprotect perms)136 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
137 {
138 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
139 perms, 0, 0);
140 }
141 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
142
143 s64
uv_bios_reserved_page_pa(u64 buf,u64 * cookie,u64 * addr,u64 * len)144 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
145 {
146 s64 ret;
147
148 ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
149 (u64)addr, buf, (u64)len, 0);
150 return ret;
151 }
152 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
153
uv_bios_freq_base(u64 clock_type,u64 * ticks_per_second)154 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
155 {
156 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
157 (u64)ticks_per_second, 0, 0, 0);
158 }
159 EXPORT_SYMBOL_GPL(uv_bios_freq_base);
160
161
162 #ifdef CONFIG_EFI
uv_bios_init(void)163 void uv_bios_init(void)
164 {
165 struct uv_systab *tab;
166
167 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
168 (efi.uv_systab == (unsigned long)NULL)) {
169 printk(KERN_CRIT "No EFI UV System Table.\n");
170 uv_systab.function = (unsigned long)NULL;
171 return;
172 }
173
174 tab = (struct uv_systab *)ioremap(efi.uv_systab,
175 sizeof(struct uv_systab));
176 if (strncmp(tab->signature, "UVST", 4) != 0)
177 printk(KERN_ERR "bad signature in UV system table!");
178
179 /*
180 * Copy table to permanent spot for later use.
181 */
182 memcpy(&uv_systab, tab, sizeof(struct uv_systab));
183 iounmap(tab);
184
185 printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
186 }
187 #else /* !CONFIG_EFI */
188
uv_bios_init(void)189 void uv_bios_init(void) { }
190 #endif
191
192