include/linux/sfi.h

   1 /* sfi.h Simple Firmware Interface */
   2
   3 /*
   4
   5   This file is provided under a dual BSD/GPLv2 license.  When using or
   6   redistributing this file, you may do so under either license.
   7
   8   GPL LICENSE SUMMARY
   9
  10   Copyright(c) 2009 Intel Corporation. All rights reserved.
  11
  12   This program is free software; you can redistribute it and/or modify
  13   it under the terms of version 2 of the GNU General Public License as
  14   published by the Free Software Foundation.
  15
  16   This program is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19   General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with this program; if not, write to the Free Software
  23   Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  24   The full GNU General Public License is included in this distribution
  25   in the file called LICENSE.GPL.
  26
  27   BSD LICENSE
  28
  29   Copyright(c) 2009 Intel Corporation. All rights reserved.
  30
  31   Redistribution and use in source and binary forms, with or without
  32   modification, are permitted provided that the following conditions
  33   are met:
  34
  35     * Redistributions of source code must retain the above copyright
  36       notice, this list of conditions and the following disclaimer.
  37     * Redistributions in binary form must reproduce the above copyright
  38       notice, this list of conditions and the following disclaimer in
  39       the documentation and/or other materials provided with the
  40       distribution.
  41     * Neither the name of Intel Corporation nor the names of its
  42       contributors may be used to endorse or promote products derived
  43       from this software without specific prior written permission.
  44
  45   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  46   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  47   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  48   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  49   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  50   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  51   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  52   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  53   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  54   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  55   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  56
  57 */
  58
  59 #ifndef _LINUX_SFI_H
  60 #define _LINUX_SFI_H
  61
  62 /* Table signatures reserved by the SFI specification */
  63 #define SFI_SIG_SYST            "SYST"
  64 #define SFI_SIG_FREQ            "FREQ"
  65 #define SFI_SIG_IDLE            "IDLE"
  66 #define SFI_SIG_CPUS            "CPUS"
  67 #define SFI_SIG_MTMR            "MTMR"
  68 #define SFI_SIG_MRTC            "MRTC"
  69 #define SFI_SIG_MMAP            "MMAP"
  70 #define SFI_SIG_APIC            "APIC"
  71 #define SFI_SIG_XSDT            "XSDT"
  72 #define SFI_SIG_WAKE            "WAKE"
  73 #define SFI_SIG_SPIB            "SPIB"
  74 #define SFI_SIG_I2CB            "I2CB"
  75 #define SFI_SIG_GPEM            "GPEM"
  76
  77 #define SFI_SIGNATURE_SIZE      4
  78 #define SFI_OEM_ID_SIZE         6
  79 #define SFI_OEM_TABLE_ID_SIZE   8
  80
  81 #define SFI_SYST_SEARCH_BEGIN           0x000E0000
  82 #define SFI_SYST_SEARCH_END             0x000FFFFF
  83
  84 #define SFI_GET_NUM_ENTRIES(ptable, entry_type) \
  85         ((ptable->header.len - sizeof(struct sfi_table_header)) / \
  86         (sizeof(entry_type)))
  87 /*
  88  * Table structures must be byte-packed to match the SFI specification,
  89  * as they are provided by the BIOS.
  90  */
  91 struct sfi_table_header {
  92         char    sig[SFI_SIGNATURE_SIZE];
  93         u32     len;
  94         u8      rev;
  95         u8      csum;
  96         char    oem_id[SFI_OEM_ID_SIZE];
  97         char    oem_table_id[SFI_OEM_TABLE_ID_SIZE];
  98 } __packed;
  99
 100 struct sfi_table_simple {
 101         struct sfi_table_header         header;
 102         u64                             pentry[1];
 103 } __packed;
 104
 105 /* Comply with UEFI spec 2.1 */
 106 struct sfi_mem_entry {
 107         u32     type;
 108         u64     phys_start;
 109         u64     virt_start;
 110         u64     pages;
 111         u64     attrib;
 112 } __packed;
 113
 114 struct sfi_cpu_table_entry {
 115         u32     apic_id;
 116 } __packed;
 117
 118 struct sfi_cstate_table_entry {
 119         u32     hint;           /* MWAIT hint */
 120         u32     latency;        /* latency in ms */
 121 } __packed;
 122
 123 struct sfi_apic_table_entry {
 124         u64     phys_addr;      /* phy base addr for APIC reg */
 125 } __packed;
 126
 127 struct sfi_freq_table_entry {
 128         u32     freq_mhz;       /* in MHZ */
 129         u32     latency;        /* transition latency in ms */
 130         u32     ctrl_val;       /* value to write to PERF_CTL */
 131 } __packed;
 132
 133 struct sfi_wake_table_entry {
 134         u64     phys_addr;      /* pointer to where the wake vector locates */
 135 } __packed;
 136
 137 struct sfi_timer_table_entry {
 138         u64     phys_addr;      /* phy base addr for the timer */
 139         u32     freq_hz;        /* in HZ */
 140         u32     irq;
 141 } __packed;
 142
 143 struct sfi_rtc_table_entry {
 144         u64     phys_addr;      /* phy base addr for the RTC */
 145         u32     irq;
 146 } __packed;
 147
 148 struct sfi_spi_table_entry {
 149         u16     host_num;       /* attached to host 0, 1...*/
 150         u16     cs;             /* chip select */
 151         u16     irq_info;
 152         char    name[16];
 153         u8      dev_info[10];
 154 } __packed;
 155
 156 struct sfi_i2c_table_entry {
 157         u16     host_num;
 158         u16     addr;           /* slave addr */
 159         u16     irq_info;
 160         char    name[16];
 161         u8      dev_info[10];
 162 } __packed;
 163
 164 struct sfi_gpe_table_entry {
 165         u16     logical_id;     /* logical id */
 166         u16     phys_id;        /* physical GPE id */
 167 } __packed;
 168
 169
 170 typedef int (*sfi_table_handler) (struct sfi_table_header *table);
 171
 172 #ifdef CONFIG_SFI
 173 extern void __init sfi_init(void);
 174 extern int __init sfi_platform_init(void);
 175 extern void __init sfi_init_late(void);
 176 extern int sfi_table_parse(char *signature, char *oem_id, char *oem_table_id,
 177                                 sfi_table_handler handler);
 178
 179 extern int sfi_disabled;
 180 static inline void disable_sfi(void)
 181 {
 182         sfi_disabled = 1;
 183 }
 184
 185 #else /* !CONFIG_SFI */
 186
 187 static inline void sfi_init(void)
 188 {
 189 }
 190
 191 static inline void sfi_init_late(void)
 192 {
 193 }
 194
 195 #define sfi_disabled    0
 196
 197 static inline int sfi_table_parse(char *signature, char *oem_id,
 198                                         char *oem_table_id,
 199                                         sfi_table_handler handler)
 200 {
 201         return -1;
 202 }
 203
 204 #endif /* !CONFIG_SFI */
 205
 206 #endif /*_LINUX_SFI_H*/