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/*
* Copyright(c) 2009 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
*/
#ifndef _LINUX_SFI_H
#define _LINUX_SFI_H
#include <errno.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_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_TABLE_MAX_ENTRIES 16
#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 __packed 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];
};
struct __packed sfi_table_simple {
struct sfi_table_header header;
u64 pentry[1];
};
/* Comply with UEFI spec 2.1 */
struct __packed sfi_mem_entry {
u32 type;
u64 phys_start;
u64 virt_start;
u64 pages;
u64 attrib;
};
struct __packed sfi_cpu_table_entry {
u32 apic_id;
};
struct __packed sfi_cstate_table_entry {
u32 hint; /* MWAIT hint */
u32 latency; /* latency in ms */
};
struct __packed sfi_apic_table_entry {
u64 phys_addr; /* phy base addr for APIC reg */
};
struct __packed sfi_freq_table_entry {
u32 freq_mhz; /* in MHZ */
u32 latency; /* transition latency in ms */
u32 ctrl_val; /* value to write to PERF_CTL */
};
struct __packed sfi_wake_table_entry {
u64 phys_addr; /* pointer to where the wake vector locates */
};
struct __packed sfi_timer_table_entry {
u64 phys_addr; /* phy base addr for the timer */
u32 freq_hz; /* in HZ */
u32 irq;
};
struct __packed sfi_rtc_table_entry {
u64 phys_addr; /* phy base addr for the RTC */
u32 irq;
};
struct __packed sfi_device_table_entry {
u8 type; /* bus type, I2C, SPI or ...*/
u8 host_num; /* attached to host 0, 1...*/
u16 addr;
u8 irq;
u32 max_freq;
char name[SFI_NAME_LEN];
};
enum {
SFI_DEV_TYPE_SPI = 0,
SFI_DEV_TYPE_I2C,
SFI_DEV_TYPE_UART,
SFI_DEV_TYPE_HSI,
SFI_DEV_TYPE_IPC,
SFI_DEV_TYPE_SD,
};
struct __packed sfi_gpio_table_entry {
char controller_name[SFI_NAME_LEN];
u16 pin_no;
char pin_name[SFI_NAME_LEN];
};
struct sfi_xsdt_header {
uint32_t oem_revision;
uint32_t creator_id;
uint32_t creator_revision;
};
typedef int (*sfi_table_handler) (struct sfi_table_header *table);
/**
* write_sfi_table() - Write Simple Firmware Interface tables
*
* @base: Address to write table to
* @return address to use for the next table
*/
u32 write_sfi_table(u32 base);
#endif /*_LINUX_SFI_H */
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