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) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. 19 * Copyright (c) Russ Anderson <rja@sgi.com> 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 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 s64 ret; 34 35 if (!tab->function) 36 /* 37 * BIOS does not support UV systab 38 */ 39 return BIOS_STATUS_UNIMPLEMENTED; 40 41 ret = efi_call6((void *)__va(tab->function), (u64)which, 42 a1, a2, a3, a4, a5); 43 return ret; 44 } 45 EXPORT_SYMBOL_GPL(uv_bios_call); 46 47 s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 48 u64 a4, u64 a5) 49 { 50 unsigned long bios_flags; 51 s64 ret; 52 53 local_irq_save(bios_flags); 54 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 55 local_irq_restore(bios_flags); 56 57 return ret; 58 } 59 60 s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 61 u64 a4, u64 a5) 62 { 63 s64 ret; 64 65 preempt_disable(); 66 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 67 preempt_enable(); 68 69 return ret; 70 } 71 72 73 long sn_partition_id; 74 EXPORT_SYMBOL_GPL(sn_partition_id); 75 long sn_coherency_id; 76 EXPORT_SYMBOL_GPL(sn_coherency_id); 77 long sn_region_size; 78 EXPORT_SYMBOL_GPL(sn_region_size); 79 long system_serial_number; 80 EXPORT_SYMBOL_GPL(system_serial_number); 81 int uv_type; 82 EXPORT_SYMBOL_GPL(uv_type); 83 84 85 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, 86 long *region, long *ssn) 87 { 88 s64 ret; 89 u64 v0, v1; 90 union partition_info_u part; 91 92 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, 93 (u64)(&v0), (u64)(&v1), 0, 0); 94 if (ret != BIOS_STATUS_SUCCESS) 95 return ret; 96 97 part.val = v0; 98 if (uvtype) 99 *uvtype = part.hub_version; 100 if (partid) 101 *partid = part.partition_id; 102 if (coher) 103 *coher = part.coherence_id; 104 if (region) 105 *region = part.region_size; 106 if (ssn) 107 *ssn = v1; 108 return ret; 109 } 110 EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); 111 112 int 113 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, 114 unsigned long *intr_mmr_offset) 115 { 116 u64 watchlist; 117 s64 ret; 118 119 /* 120 * bios returns watchlist number or negative error number. 121 */ 122 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, 123 mq_size, (u64)intr_mmr_offset, 124 (u64)&watchlist, 0); 125 if (ret < BIOS_STATUS_SUCCESS) 126 return ret; 127 128 return watchlist; 129 } 130 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); 131 132 int 133 uv_bios_mq_watchlist_free(int blade, int watchlist_num) 134 { 135 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, 136 blade, watchlist_num, 0, 0, 0); 137 } 138 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); 139 140 s64 141 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) 142 { 143 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, 144 perms, 0, 0); 145 } 146 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); 147 148 s64 149 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) 150 { 151 s64 ret; 152 153 ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, 154 (u64)addr, buf, (u64)len, 0); 155 return ret; 156 } 157 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); 158 159 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) 160 { 161 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, 162 (u64)ticks_per_second, 0, 0, 0); 163 } 164 EXPORT_SYMBOL_GPL(uv_bios_freq_base); 165 166 /* 167 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target 168 * @decode: true to enable target, false to disable target 169 * @domain: PCI domain number 170 * @bus: PCI bus number 171 * 172 * Returns: 173 * 0: Success 174 * -EINVAL: Invalid domain or bus number 175 * -ENOSYS: Capability not available 176 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time 177 */ 178 int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) 179 { 180 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, 181 (u64)decode, (u64)domain, (u64)bus, 0, 0); 182 } 183 EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); 184 185 186 #ifdef CONFIG_EFI 187 void uv_bios_init(void) 188 { 189 struct uv_systab *tab; 190 191 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || 192 (efi.uv_systab == (unsigned long)NULL)) { 193 printk(KERN_CRIT "No EFI UV System Table.\n"); 194 uv_systab.function = (unsigned long)NULL; 195 return; 196 } 197 198 tab = (struct uv_systab *)ioremap(efi.uv_systab, 199 sizeof(struct uv_systab)); 200 if (strncmp(tab->signature, "UVST", 4) != 0) 201 printk(KERN_ERR "bad signature in UV system table!"); 202 203 /* 204 * Copy table to permanent spot for later use. 205 */ 206 memcpy(&uv_systab, tab, sizeof(struct uv_systab)); 207 iounmap(tab); 208 209 printk(KERN_INFO "EFI UV System Table Revision %d\n", 210 uv_systab.revision); 211 } 212 #else /* !CONFIG_EFI */ 213 214 void uv_bios_init(void) { } 215 #endif 216