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>
24 #include <linux/slab.h>
27 #include <asm/uv/bios.h>
28 #include <asm/uv/uv_hub.h>
30 struct uv_systab *uv_systab;
32 s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
34 struct uv_systab *tab = uv_systab;
37 if (!tab || !tab->function)
39 * BIOS does not support UV systab
41 return BIOS_STATUS_UNIMPLEMENTED;
43 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
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);
187 void uv_bios_init(void)
190 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab) {
191 pr_crit("UV: UVsystab: missing\n");
195 uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab));
196 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
197 pr_err("UV: UVsystab: bad signature!\n");
202 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
204 uv_systab = ioremap(efi.uv_systab, uv_systab->size);
206 pr_err("UV: UVsystab: ioremap(%d) failed!\n",
211 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);