2 * BIOS run time interface routines.
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.
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.
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
18 * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Russ Anderson <rja@sgi.com>
22 #include <linux/efi.h>
23 #include <linux/export.h>
26 #include <asm/uv/bios.h>
27 #include <asm/uv/uv_hub.h>
29 static struct uv_systab uv_systab
;
31 s64
uv_bios_call(enum uv_bios_cmd which
, u64 a1
, u64 a2
, u64 a3
, u64 a4
, u64 a5
)
33 struct uv_systab
*tab
= &uv_systab
;
38 * BIOS does not support UV systab
40 return BIOS_STATUS_UNIMPLEMENTED
;
42 ret
= efi_call6((void *)__va(tab
->function
), (u64
)which
,
46 EXPORT_SYMBOL_GPL(uv_bios_call
);
48 s64
uv_bios_call_irqsave(enum uv_bios_cmd which
, u64 a1
, u64 a2
, u64 a3
,
51 unsigned long bios_flags
;
54 local_irq_save(bios_flags
);
55 ret
= uv_bios_call(which
, a1
, a2
, a3
, a4
, a5
);
56 local_irq_restore(bios_flags
);
61 s64
uv_bios_call_reentrant(enum uv_bios_cmd which
, u64 a1
, u64 a2
, u64 a3
,
67 ret
= uv_bios_call(which
, a1
, a2
, a3
, a4
, a5
);
75 EXPORT_SYMBOL_GPL(sn_partition_id
);
77 EXPORT_SYMBOL_GPL(sn_coherency_id
);
79 EXPORT_SYMBOL_GPL(sn_region_size
);
80 long system_serial_number
;
81 EXPORT_SYMBOL_GPL(system_serial_number
);
83 EXPORT_SYMBOL_GPL(uv_type
);
86 s64
uv_bios_get_sn_info(int fc
, int *uvtype
, long *partid
, long *coher
,
87 long *region
, long *ssn
)
91 union partition_info_u part
;
93 ret
= uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO
, fc
,
94 (u64
)(&v0
), (u64
)(&v1
), 0, 0);
95 if (ret
!= BIOS_STATUS_SUCCESS
)
100 *uvtype
= part
.hub_version
;
102 *partid
= part
.partition_id
;
104 *coher
= part
.coherence_id
;
106 *region
= part
.region_size
;
111 EXPORT_SYMBOL_GPL(uv_bios_get_sn_info
);
114 uv_bios_mq_watchlist_alloc(unsigned long addr
, unsigned int mq_size
,
115 unsigned long *intr_mmr_offset
)
121 * bios returns watchlist number or negative error number.
123 ret
= (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC
, addr
,
124 mq_size
, (u64
)intr_mmr_offset
,
126 if (ret
< BIOS_STATUS_SUCCESS
)
131 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc
);
134 uv_bios_mq_watchlist_free(int blade
, int watchlist_num
)
136 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE
,
137 blade
, watchlist_num
, 0, 0, 0);
139 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free
);
142 uv_bios_change_memprotect(u64 paddr
, u64 len
, enum uv_memprotect perms
)
144 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT
, paddr
, len
,
147 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect
);
150 uv_bios_reserved_page_pa(u64 buf
, u64
*cookie
, u64
*addr
, u64
*len
)
154 ret
= uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR
, (u64
)cookie
,
155 (u64
)addr
, buf
, (u64
)len
, 0);
158 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa
);
160 s64
uv_bios_freq_base(u64 clock_type
, u64
*ticks_per_second
)
162 return uv_bios_call(UV_BIOS_FREQ_BASE
, clock_type
,
163 (u64
)ticks_per_second
, 0, 0, 0);
165 EXPORT_SYMBOL_GPL(uv_bios_freq_base
);
168 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
169 * @decode: true to enable target, false to disable target
170 * @domain: PCI domain number
171 * @bus: PCI bus number
175 * -EINVAL: Invalid domain or bus number
176 * -ENOSYS: Capability not available
177 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
179 int uv_bios_set_legacy_vga_target(bool decode
, int domain
, int bus
)
181 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET
,
182 (u64
)decode
, (u64
)domain
, (u64
)bus
, 0, 0);
184 EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target
);
188 void uv_bios_init(void)
190 struct uv_systab
*tab
;
192 if ((efi
.uv_systab
== EFI_INVALID_TABLE_ADDR
) ||
193 (efi
.uv_systab
== (unsigned long)NULL
)) {
194 printk(KERN_CRIT
"No EFI UV System Table.\n");
195 uv_systab
.function
= (unsigned long)NULL
;
199 tab
= (struct uv_systab
*)ioremap(efi
.uv_systab
,
200 sizeof(struct uv_systab
));
201 if (strncmp(tab
->signature
, "UVST", 4) != 0)
202 printk(KERN_ERR
"bad signature in UV system table!");
205 * Copy table to permanent spot for later use.
207 memcpy(&uv_systab
, tab
, sizeof(struct uv_systab
));
210 printk(KERN_INFO
"EFI UV System Table Revision %d\n",
213 #else /* !CONFIG_EFI */
215 void uv_bios_init(void) { }