1 /* sfi.h Simple Firmware Interface */
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.
10 Copyright(c) 2009 Intel Corporation. All rights reserved.
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.
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.
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.
29 Copyright(c) 2009 Intel Corporation. All rights reserved.
31 Redistribution and use in source and binary forms, with or without
32 modification, are permitted provided that the following conditions
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
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.
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.
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"
77 #define SFI_SIGNATURE_SIZE 4
78 #define SFI_OEM_ID_SIZE 6
79 #define SFI_OEM_TABLE_ID_SIZE 8
81 #define SFI_SYST_SEARCH_BEGIN 0x000E0000
82 #define SFI_SYST_SEARCH_END 0x000FFFFF
84 #define SFI_GET_NUM_ENTRIES(ptable, entry_type) \
85 ((ptable->header.len - sizeof(struct sfi_table_header)) / \
88 * Table structures must be byte-packed to match the SFI specification,
89 * as they are provided by the BIOS.
91 struct sfi_table_header {
92 char sig[SFI_SIGNATURE_SIZE];
96 char oem_id[SFI_OEM_ID_SIZE];
97 char oem_table_id[SFI_OEM_TABLE_ID_SIZE];
100 struct sfi_table_simple {
101 struct sfi_table_header header;
105 /* Comply with UEFI spec 2.1 */
106 struct sfi_mem_entry {
114 struct sfi_cpu_table_entry {
118 struct sfi_cstate_table_entry {
119 u32 hint; /* MWAIT hint */
120 u32 latency; /* latency in ms */
123 struct sfi_apic_table_entry {
124 u64 phys_addr; /* phy base addr for APIC reg */
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 */
133 struct sfi_wake_table_entry {
134 u64 phys_addr; /* pointer to where the wake vector locates */
137 struct sfi_timer_table_entry {
138 u64 phys_addr; /* phy base addr for the timer */
139 u32 freq_hz; /* in HZ */
143 struct sfi_rtc_table_entry {
144 u64 phys_addr; /* phy base addr for the RTC */
148 struct sfi_spi_table_entry {
149 u16 host_num; /* attached to host 0, 1...*/
150 u16 cs; /* chip select */
156 struct sfi_i2c_table_entry {
158 u16 addr; /* slave addr */
164 struct sfi_gpe_table_entry {
165 u16 logical_id; /* logical id */
166 u16 phys_id; /* physical GPE id */
170 typedef int (*sfi_table_handler) (struct sfi_table_header *table);
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);
179 extern int sfi_disabled;
180 static inline void disable_sfi(void)
185 #else /* !CONFIG_SFI */
187 static inline void sfi_init(void)
191 static inline void sfi_init_late(void)
195 #define sfi_disabled 0
197 static inline int sfi_table_parse(char *signature, char *oem_id,
199 sfi_table_handler handler)
204 #endif /* !CONFIG_SFI */
206 #endif /*_LINUX_SFI_H*/