| 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 | 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 | |
| 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 | |
| 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 | |
| 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 uv_coherency_id; |
| 73 | EXPORT_SYMBOL_GPL(uv_coherency_id); |
| 74 | long uv_region_size; |
| 75 | EXPORT_SYMBOL_GPL(uv_region_size); |
| 76 | int uv_type; |
| 77 | |
| 78 | |
| 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 | |
| 104 | s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) |
| 105 | { |
| 106 | return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, |
| 107 | (u64)ticks_per_second, 0, 0, 0); |
| 108 | } |
| 109 | EXPORT_SYMBOL_GPL(uv_bios_freq_base); |
| 110 | |
| 111 | |
| 112 | #ifdef CONFIG_EFI |
| 113 | void uv_bios_init(void) |
| 114 | { |
| 115 | struct uv_systab *tab; |
| 116 | |
| 117 | if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || |
| 118 | (efi.uv_systab == (unsigned long)NULL)) { |
| 119 | printk(KERN_CRIT "No EFI UV System Table.\n"); |
| 120 | uv_systab.function = (unsigned long)NULL; |
| 121 | return; |
| 122 | } |
| 123 | |
| 124 | tab = (struct uv_systab *)ioremap(efi.uv_systab, |
| 125 | sizeof(struct uv_systab)); |
| 126 | if (strncmp(tab->signature, "UVST", 4) != 0) |
| 127 | printk(KERN_ERR "bad signature in UV system table!"); |
| 128 | |
| 129 | /* |
| 130 | * Copy table to permanent spot for later use. |
| 131 | */ |
| 132 | memcpy(&uv_systab, tab, sizeof(struct uv_systab)); |
| 133 | iounmap(tab); |
| 134 | |
| 135 | printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision); |
| 136 | } |
| 137 | #else /* !CONFIG_EFI */ |
| 138 | |
| 139 | void uv_bios_init(void) { } |
| 140 | #endif |
| 141 | |