[mirror_ubuntu-bionic-kernel.git] / include / linux / sfi.h

/* sfi.h Simple Firmware Interface */

/*

  This file is provided under a dual BSD/GPLv2 license.  When using or
  redistributing this file, you may do so under either license.

  GPL LICENSE SUMMARY

  Copyright(c) 2009 Intel Corporation. All rights reserved.

  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  The full GNU General Public License is included in this distribution
  in the file called LICENSE.GPL.

  BSD LICENSE

  Copyright(c) 2009 Intel Corporation. All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in
      the documentation and/or other materials provided with the
      distribution.
    * Neither the name of Intel Corporation nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#ifndef _LINUX_SFI_H
#define _LINUX_SFI_H

#include <linux/init.h>
#include <linux/types.h>

/* Table signatures reserved by the SFI specification */
#define SFI_SIG_SYST		"SYST"
#define SFI_SIG_FREQ		"FREQ"
#define SFI_SIG_IDLE		"IDLE"
#define SFI_SIG_CPUS		"CPUS"
#define SFI_SIG_MTMR		"MTMR"
#define SFI_SIG_MRTC		"MRTC"
#define SFI_SIG_MMAP		"MMAP"
#define SFI_SIG_APIC		"APIC"
#define SFI_SIG_XSDT		"XSDT"
#define SFI_SIG_WAKE		"WAKE"
#define SFI_SIG_DEVS		"DEVS"
#define SFI_SIG_GPIO		"GPIO"

#define SFI_SIGNATURE_SIZE	4
#define SFI_OEM_ID_SIZE		6
#define SFI_OEM_TABLE_ID_SIZE	8

#define SFI_NAME_LEN		16

#define SFI_SYST_SEARCH_BEGIN		0x000E0000
#define SFI_SYST_SEARCH_END		0x000FFFFF

#define SFI_GET_NUM_ENTRIES(ptable, entry_type) \
	((ptable->header.len - sizeof(struct sfi_table_header)) / \
	(sizeof(entry_type)))
/*
 * Table structures must be byte-packed to match the SFI specification,
 * as they are provided by the BIOS.
 */
struct sfi_table_header {
	char	sig[SFI_SIGNATURE_SIZE];
	u32	len;
	u8	rev;
	u8	csum;
	char	oem_id[SFI_OEM_ID_SIZE];
	char	oem_table_id[SFI_OEM_TABLE_ID_SIZE];
} __packed;

struct sfi_table_simple {
	struct sfi_table_header		header;
	u64				pentry[1];
} __packed;

/* Comply with UEFI spec 2.1 */
struct sfi_mem_entry {
	u32	type;
	u64	phys_start;
	u64	virt_start;
	u64	pages;
	u64	attrib;
} __packed;

struct sfi_cpu_table_entry {
	u32	apic_id;
} __packed;

struct sfi_cstate_table_entry {
	u32	hint;		/* MWAIT hint */
	u32	latency;	/* latency in ms */
} __packed;

struct sfi_apic_table_entry {
	u64	phys_addr;	/* phy base addr for APIC reg */
} __packed;

struct sfi_freq_table_entry {
	u32	freq_mhz;	/* in MHZ */
	u32	latency;	/* transition latency in ms */
	u32	ctrl_val;	/* value to write to PERF_CTL */
} __packed;

struct sfi_wake_table_entry {
	u64	phys_addr;	/* pointer to where the wake vector locates */
} __packed;

struct sfi_timer_table_entry {
	u64	phys_addr;	/* phy base addr for the timer */
	u32	freq_hz;	/* in HZ */
	u32	irq;
} __packed;

struct sfi_rtc_table_entry {
	u64	phys_addr;	/* phy base addr for the RTC */
	u32	irq;
} __packed;

struct sfi_device_table_entry {
	u8	type;		/* bus type, I2C, SPI or ...*/
#define SFI_DEV_TYPE_SPI	0
#define SFI_DEV_TYPE_I2C	1
#define SFI_DEV_TYPE_UART	2
#define SFI_DEV_TYPE_HSI	3
#define SFI_DEV_TYPE_IPC	4

	u8	host_num;	/* attached to host 0, 1...*/
	u16	addr;
	u8	irq;
	u32	max_freq;
	char	name[SFI_NAME_LEN];
} __packed;

struct sfi_gpio_table_entry {
	char	controller_name[SFI_NAME_LEN];
	u16	pin_no;
	char	pin_name[SFI_NAME_LEN];
} __packed;

typedef int (*sfi_table_handler) (struct sfi_table_header *table);

#ifdef CONFIG_SFI
extern void __init sfi_init(void);
extern int __init sfi_platform_init(void);
extern void __init sfi_init_late(void);
extern int sfi_table_parse(char *signature, char *oem_id, char *oem_table_id,
				sfi_table_handler handler);

extern int sfi_disabled;
static inline void disable_sfi(void)
{
	sfi_disabled = 1;
}

#else /* !CONFIG_SFI */

static inline void sfi_init(void)
{
}

static inline void sfi_init_late(void)
{
}

#define sfi_disabled	0

static inline int sfi_table_parse(char *signature, char *oem_id,
					char *oem_table_id,
					sfi_table_handler handler)
{
	return -1;
}

#endif /* !CONFIG_SFI */

#endif /*_LINUX_SFI_H*/
Commit	Line	Data
117a9ac7 FT	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
40a96d54 DC	62	#include <linux/init.h>
	63	#include <linux/types.h>
	64
117a9ac7 FT	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"
5487ab4a FT	76	#define SFI_SIG_DEVS "DEVS"
5487ab4a FT	77	#define SFI_SIG_GPIO "GPIO"
117a9ac7 FT	78
	79	#define SFI_SIGNATURE_SIZE 4
	80	#define SFI_OEM_ID_SIZE 6
	81	#define SFI_OEM_TABLE_ID_SIZE 8
	82
1da4b1c6 FT	83	#define SFI_NAME_LEN 16
1da4b1c6 FT	84
117a9ac7 FT	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
5487ab4a FT	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
	160	u8 host_num; /* attached to host 0, 1...*/
	161	u16 addr;
	162	u8 irq;
	163	u32 max_freq;
1da4b1c6	164	char name[SFI_NAME_LEN];
5487ab4a FT	165	} __packed;
	166
	167	struct sfi_gpio_table_entry {
1da4b1c6	168	char controller_name[SFI_NAME_LEN];
5487ab4a	169	u16 pin_no;
1da4b1c6	170	char pin_name[SFI_NAME_LEN];
5487ab4a FT	171	} __packed;
5487ab4a FT	172
117a9ac7 FT	173	typedef int (sfi_table_handler) (struct sfi_table_header table);
	174
	175	#ifdef CONFIG_SFI
	176	extern void __init sfi_init(void);
	177	extern int __init sfi_platform_init(void);
	178	extern void __init sfi_init_late(void);
	179	extern int sfi_table_parse(char signature, char oem_id, char *oem_table_id,
	180	sfi_table_handler handler);
	181
	182	extern int sfi_disabled;
	183	static inline void disable_sfi(void)
	184	{
	185	sfi_disabled = 1;
	186	}
	187
	188	#else /* !CONFIG_SFI */
	189
	190	static inline void sfi_init(void)
	191	{
	192	}
	193
	194	static inline void sfi_init_late(void)
	195	{
	196	}
	197
	198	#define sfi_disabled 0
	199
	200	static inline int sfi_table_parse(char signature, char oem_id,
	201	char *oem_table_id,
	202	sfi_table_handler handler)
	203	{
	204	return -1;
	205	}
	206
	207	#endif /* !CONFIG_SFI */
	208
	209	#endif /_LINUX_SFI_H/