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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_X86_UV_BIOS_H
#define _ASM_X86_UV_BIOS_H
/*
* UV BIOS layer definitions.
*
* Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
* Copyright (c) Russ Anderson <rja@sgi.com>
*/
#include <linux/rtc.h>
/*
* Values for the BIOS calls. It is passed as the first * argument in the
* BIOS call. Passing any other value in the first argument will result
* in a BIOS_STATUS_UNIMPLEMENTED return status.
*/
enum uv_bios_cmd {
UV_BIOS_COMMON,
UV_BIOS_GET_SN_INFO,
UV_BIOS_FREQ_BASE,
UV_BIOS_WATCHLIST_ALLOC,
UV_BIOS_WATCHLIST_FREE,
UV_BIOS_MEMPROTECT,
UV_BIOS_GET_PARTITION_ADDR,
UV_BIOS_SET_LEGACY_VGA_TARGET
};
/*
* Status values returned from a BIOS call.
*/
enum {
BIOS_STATUS_MORE_PASSES = 1,
BIOS_STATUS_SUCCESS = 0,
BIOS_STATUS_UNIMPLEMENTED = -ENOSYS,
BIOS_STATUS_EINVAL = -EINVAL,
BIOS_STATUS_UNAVAIL = -EBUSY,
BIOS_STATUS_ABORT = -EINTR,
};
/* Address map parameters */
struct uv_gam_parameters {
u64 mmr_base;
u64 gru_base;
u8 mmr_shift; /* Convert PNode to MMR space offset */
u8 gru_shift; /* Convert PNode to GRU space offset */
u8 gpa_shift; /* Size of offset field in GRU phys addr */
u8 unused1;
};
/* UV_TABLE_GAM_RANGE_ENTRY values */
#define UV_GAM_RANGE_TYPE_UNUSED 0 /* End of table */
#define UV_GAM_RANGE_TYPE_RAM 1 /* Normal RAM */
#define UV_GAM_RANGE_TYPE_NVRAM 2 /* Non-volatile memory */
#define UV_GAM_RANGE_TYPE_NV_WINDOW 3 /* NVMDIMM block window */
#define UV_GAM_RANGE_TYPE_NV_MAILBOX 4 /* NVMDIMM mailbox */
#define UV_GAM_RANGE_TYPE_HOLE 5 /* Unused address range */
#define UV_GAM_RANGE_TYPE_MAX 6
/* The structure stores PA bits 56:26, for 64MB granularity */
#define UV_GAM_RANGE_SHFT 26 /* 64MB */
struct uv_gam_range_entry {
char type; /* Entry type: GAM_RANGE_TYPE_UNUSED, etc. */
char unused1;
u16 nasid; /* HNasid */
u16 sockid; /* Socket ID, high bits of APIC ID */
u16 pnode; /* Index to MMR and GRU spaces */
u32 unused2;
u32 limit; /* PA bits 56:26 (UV_GAM_RANGE_SHFT) */
};
#define UV_SYSTAB_SIG "UVST"
#define UV_SYSTAB_VERSION_1 1 /* UV2/3 BIOS version */
#define UV_SYSTAB_VERSION_UV4 0x400 /* UV4 BIOS base version */
#define UV_SYSTAB_VERSION_UV4_1 0x401 /* + gpa_shift */
#define UV_SYSTAB_VERSION_UV4_2 0x402 /* + TYPE_NVRAM/WINDOW/MBOX */
#define UV_SYSTAB_VERSION_UV4_3 0x403 /* - GAM Range PXM Value */
#define UV_SYSTAB_VERSION_UV4_LATEST UV_SYSTAB_VERSION_UV4_3
#define UV_SYSTAB_TYPE_UNUSED 0 /* End of table (offset == 0) */
#define UV_SYSTAB_TYPE_GAM_PARAMS 1 /* GAM PARAM conversions */
#define UV_SYSTAB_TYPE_GAM_RNG_TBL 2 /* GAM entry table */
#define UV_SYSTAB_TYPE_MAX 3
/*
* The UV system table describes specific firmware
* capabilities available to the Linux kernel at runtime.
*/
struct uv_systab {
char signature[4]; /* must be UV_SYSTAB_SIG */
u32 revision; /* distinguish different firmware revs */
u64 function; /* BIOS runtime callback function ptr */
u32 size; /* systab size (starting with _VERSION_UV4) */
struct {
u32 type:8; /* type of entry */
u32 offset:24; /* byte offset from struct start to entry */
} entry[1]; /* additional entries follow */
};
extern struct uv_systab *uv_systab;
/* (... end of definitions from UV BIOS ...) */
enum {
BIOS_FREQ_BASE_PLATFORM = 0,
BIOS_FREQ_BASE_INTERVAL_TIMER = 1,
BIOS_FREQ_BASE_REALTIME_CLOCK = 2
};
union partition_info_u {
u64 val;
struct {
u64 hub_version : 8,
partition_id : 16,
coherence_id : 16,
region_size : 24;
};
};
enum uv_memprotect {
UV_MEMPROT_RESTRICT_ACCESS,
UV_MEMPROT_ALLOW_AMO,
UV_MEMPROT_ALLOW_RW
};
extern s64 uv_bios_get_sn_info(int, int *, long *, long *, long *, long *);
extern s64 uv_bios_freq_base(u64, u64 *);
extern int uv_bios_mq_watchlist_alloc(unsigned long, unsigned int,
unsigned long *);
extern int uv_bios_mq_watchlist_free(int, int);
extern s64 uv_bios_change_memprotect(u64, u64, enum uv_memprotect);
extern s64 uv_bios_reserved_page_pa(u64, u64 *, u64 *, u64 *);
extern int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus);
extern int uv_bios_init(void);
extern unsigned long sn_rtc_cycles_per_second;
extern int uv_type;
extern long sn_partition_id;
extern long sn_coherency_id;
extern long sn_region_size;
extern long system_serial_number;
extern struct kobject *sgi_uv_kobj; /* /sys/firmware/sgi_uv */
/*
* EFI runtime lock; cf. firmware/efi/runtime-wrappers.c for details
*/
extern struct semaphore __efi_uv_runtime_lock;
#endif /* _ASM_X86_UV_BIOS_H */
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