LCOV - code coverage report
Current view: top level - include/linux - sfi.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 4 4 100.0 %
Date: 2022-04-01 14:35:51 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       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                 :            : #include <linux/init.h>
      63                 :            : #include <linux/types.h>
      64                 :            : 
      65                 :            : /* Table signatures reserved by the SFI specification */
      66                 :            : #define SFI_SIG_SYST            "SYST"
      67                 :            : #define SFI_SIG_FREQ            "FREQ"
      68                 :            : #define SFI_SIG_IDLE            "IDLE"
      69                 :            : #define SFI_SIG_CPUS            "CPUS"
      70                 :            : #define SFI_SIG_MTMR            "MTMR"
      71                 :            : #define SFI_SIG_MRTC            "MRTC"
      72                 :            : #define SFI_SIG_MMAP            "MMAP"
      73                 :            : #define SFI_SIG_APIC            "APIC"
      74                 :            : #define SFI_SIG_XSDT            "XSDT"
      75                 :            : #define SFI_SIG_WAKE            "WAKE"
      76                 :            : #define SFI_SIG_DEVS            "DEVS"
      77                 :            : #define SFI_SIG_GPIO            "GPIO"
      78                 :            : 
      79                 :            : #define SFI_SIGNATURE_SIZE      4
      80                 :            : #define SFI_OEM_ID_SIZE         6
      81                 :            : #define SFI_OEM_TABLE_ID_SIZE   8
      82                 :            : 
      83                 :            : #define SFI_NAME_LEN            16
      84                 :            : 
      85                 :            : #define SFI_SYST_SEARCH_BEGIN           0x000E0000
      86                 :            : #define SFI_SYST_SEARCH_END             0x000FFFFF
      87                 :            : 
      88                 :            : #define SFI_GET_NUM_ENTRIES(ptable, entry_type) \
      89                 :            :         ((ptable->header.len - sizeof(struct sfi_table_header)) / \
      90                 :            :         (sizeof(entry_type)))
      91                 :            : /*
      92                 :            :  * Table structures must be byte-packed to match the SFI specification,
      93                 :            :  * as they are provided by the BIOS.
      94                 :            :  */
      95                 :            : struct sfi_table_header {
      96                 :            :         char    sig[SFI_SIGNATURE_SIZE];
      97                 :            :         u32     len;
      98                 :            :         u8      rev;
      99                 :            :         u8      csum;
     100                 :            :         char    oem_id[SFI_OEM_ID_SIZE];
     101                 :            :         char    oem_table_id[SFI_OEM_TABLE_ID_SIZE];
     102                 :            : } __packed;
     103                 :            : 
     104                 :            : struct sfi_table_simple {
     105                 :            :         struct sfi_table_header         header;
     106                 :            :         u64                             pentry[1];
     107                 :            : } __packed;
     108                 :            : 
     109                 :            : /* Comply with UEFI spec 2.1 */
     110                 :            : struct sfi_mem_entry {
     111                 :            :         u32     type;
     112                 :            :         u64     phys_start;
     113                 :            :         u64     virt_start;
     114                 :            :         u64     pages;
     115                 :            :         u64     attrib;
     116                 :            : } __packed;
     117                 :            : 
     118                 :            : struct sfi_cpu_table_entry {
     119                 :            :         u32     apic_id;
     120                 :            : } __packed;
     121                 :            : 
     122                 :            : struct sfi_cstate_table_entry {
     123                 :            :         u32     hint;           /* MWAIT hint */
     124                 :            :         u32     latency;        /* latency in ms */
     125                 :            : } __packed;
     126                 :            : 
     127                 :            : struct sfi_apic_table_entry {
     128                 :            :         u64     phys_addr;      /* phy base addr for APIC reg */
     129                 :            : } __packed;
     130                 :            : 
     131                 :            : struct sfi_freq_table_entry {
     132                 :            :         u32     freq_mhz;       /* in MHZ */
     133                 :            :         u32     latency;        /* transition latency in ms */
     134                 :            :         u32     ctrl_val;       /* value to write to PERF_CTL */
     135                 :            : } __packed;
     136                 :            : 
     137                 :            : struct sfi_wake_table_entry {
     138                 :            :         u64     phys_addr;      /* pointer to where the wake vector locates */
     139                 :            : } __packed;
     140                 :            : 
     141                 :            : struct sfi_timer_table_entry {
     142                 :            :         u64     phys_addr;      /* phy base addr for the timer */
     143                 :            :         u32     freq_hz;        /* in HZ */
     144                 :            :         u32     irq;
     145                 :            : } __packed;
     146                 :            : 
     147                 :            : struct sfi_rtc_table_entry {
     148                 :            :         u64     phys_addr;      /* phy base addr for the RTC */
     149                 :            :         u32     irq;
     150                 :            : } __packed;
     151                 :            : 
     152                 :            : struct sfi_device_table_entry {
     153                 :            :         u8      type;           /* bus type, I2C, SPI or ...*/
     154                 :            : #define SFI_DEV_TYPE_SPI        0
     155                 :            : #define SFI_DEV_TYPE_I2C        1
     156                 :            : #define SFI_DEV_TYPE_UART       2
     157                 :            : #define SFI_DEV_TYPE_HSI        3
     158                 :            : #define SFI_DEV_TYPE_IPC        4
     159                 :            : #define SFI_DEV_TYPE_SD         5
     160                 :            : 
     161                 :            :         u8      host_num;       /* attached to host 0, 1...*/
     162                 :            :         u16     addr;
     163                 :            :         u8      irq;
     164                 :            :         u32     max_freq;
     165                 :            :         char    name[SFI_NAME_LEN];
     166                 :            : } __packed;
     167                 :            : 
     168                 :            : struct sfi_gpio_table_entry {
     169                 :            :         char    controller_name[SFI_NAME_LEN];
     170                 :            :         u16     pin_no;
     171                 :            :         char    pin_name[SFI_NAME_LEN];
     172                 :            : } __packed;
     173                 :            : 
     174                 :            : typedef int (*sfi_table_handler) (struct sfi_table_header *table);
     175                 :            : 
     176                 :            : #ifdef CONFIG_SFI
     177                 :            : extern void __init sfi_init(void);
     178                 :            : extern int __init sfi_platform_init(void);
     179                 :            : extern void __init sfi_init_late(void);
     180                 :            : extern int sfi_table_parse(char *signature, char *oem_id, char *oem_table_id,
     181                 :            :                                 sfi_table_handler handler);
     182                 :            : 
     183                 :            : extern int sfi_disabled;
     184                 :            : static inline void disable_sfi(void)
     185                 :            : {
     186                 :            :         sfi_disabled = 1;
     187                 :            : }
     188                 :            : 
     189                 :            : #else /* !CONFIG_SFI */
     190                 :            : 
     191                 :         21 : static inline void sfi_init(void)
     192                 :            : {
     193                 :         21 : }
     194                 :            : 
     195                 :         21 : static inline void sfi_init_late(void)
     196                 :            : {
     197                 :         21 : }
     198                 :            : 
     199                 :            : #define sfi_disabled    0
     200                 :            : 
     201                 :            : static inline int sfi_table_parse(char *signature, char *oem_id,
     202                 :            :                                         char *oem_table_id,
     203                 :            :                                         sfi_table_handler handler)
     204                 :            : {
     205                 :            :         return -1;
     206                 :            : }
     207                 :            : 
     208                 :            : #endif /* !CONFIG_SFI */
     209                 :            : 
     210                 :            : #endif /*_LINUX_SFI_H*/

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