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TOMOYO Linux Cross Reference
Linux/arch/x86/include/asm/uv/bios.h

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  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 #ifndef _ASM_X86_UV_BIOS_H
  3 #define _ASM_X86_UV_BIOS_H
  4 
  5 /*
  6  * UV BIOS layer definitions.
  7  *
  8  *  Copyright (c) 2008-2009 Silicon Graphics, Inc.  All Rights Reserved.
  9  *  Copyright (c) Russ Anderson <rja@sgi.com>
 10  */
 11 
 12 #include <linux/rtc.h>
 13 
 14 /*
 15  * Values for the BIOS calls.  It is passed as the first * argument in the
 16  * BIOS call.  Passing any other value in the first argument will result
 17  * in a BIOS_STATUS_UNIMPLEMENTED return status.
 18  */
 19 enum uv_bios_cmd {
 20         UV_BIOS_COMMON,
 21         UV_BIOS_GET_SN_INFO,
 22         UV_BIOS_FREQ_BASE,
 23         UV_BIOS_WATCHLIST_ALLOC,
 24         UV_BIOS_WATCHLIST_FREE,
 25         UV_BIOS_MEMPROTECT,
 26         UV_BIOS_GET_PARTITION_ADDR,
 27         UV_BIOS_SET_LEGACY_VGA_TARGET
 28 };
 29 
 30 /*
 31  * Status values returned from a BIOS call.
 32  */
 33 enum {
 34         BIOS_STATUS_MORE_PASSES         =  1,
 35         BIOS_STATUS_SUCCESS             =  0,
 36         BIOS_STATUS_UNIMPLEMENTED       = -ENOSYS,
 37         BIOS_STATUS_EINVAL              = -EINVAL,
 38         BIOS_STATUS_UNAVAIL             = -EBUSY,
 39         BIOS_STATUS_ABORT               = -EINTR,
 40 };
 41 
 42 /* Address map parameters */
 43 struct uv_gam_parameters {
 44         u64     mmr_base;
 45         u64     gru_base;
 46         u8      mmr_shift;      /* Convert PNode to MMR space offset */
 47         u8      gru_shift;      /* Convert PNode to GRU space offset */
 48         u8      gpa_shift;      /* Size of offset field in GRU phys addr */
 49         u8      unused1;
 50 };
 51 
 52 /* UV_TABLE_GAM_RANGE_ENTRY values */
 53 #define UV_GAM_RANGE_TYPE_UNUSED        0 /* End of table */
 54 #define UV_GAM_RANGE_TYPE_RAM           1 /* Normal RAM */
 55 #define UV_GAM_RANGE_TYPE_NVRAM         2 /* Non-volatile memory */
 56 #define UV_GAM_RANGE_TYPE_NV_WINDOW     3 /* NVMDIMM block window */
 57 #define UV_GAM_RANGE_TYPE_NV_MAILBOX    4 /* NVMDIMM mailbox */
 58 #define UV_GAM_RANGE_TYPE_HOLE          5 /* Unused address range */
 59 #define UV_GAM_RANGE_TYPE_MAX           6
 60 
 61 /* The structure stores PA bits 56:26, for 64MB granularity */
 62 #define UV_GAM_RANGE_SHFT               26              /* 64MB */
 63 
 64 struct uv_gam_range_entry {
 65         char    type;           /* Entry type: GAM_RANGE_TYPE_UNUSED, etc. */
 66         char    unused1;
 67         u16     nasid;          /* HNasid */
 68         u16     sockid;         /* Socket ID, high bits of APIC ID */
 69         u16     pnode;          /* Index to MMR and GRU spaces */
 70         u32     unused2;
 71         u32     limit;          /* PA bits 56:26 (UV_GAM_RANGE_SHFT) */
 72 };
 73 
 74 #define UV_SYSTAB_SIG                   "UVST"
 75 #define UV_SYSTAB_VERSION_1             1       /* UV1/2/3 BIOS version */
 76 #define UV_SYSTAB_VERSION_UV4           0x400   /* UV4 BIOS base version */
 77 #define UV_SYSTAB_VERSION_UV4_1         0x401   /* + gpa_shift */
 78 #define UV_SYSTAB_VERSION_UV4_2         0x402   /* + TYPE_NVRAM/WINDOW/MBOX */
 79 #define UV_SYSTAB_VERSION_UV4_3         0x403   /* - GAM Range PXM Value */
 80 #define UV_SYSTAB_VERSION_UV4_LATEST    UV_SYSTAB_VERSION_UV4_3
 81 
 82 #define UV_SYSTAB_TYPE_UNUSED           0       /* End of table (offset == 0) */
 83 #define UV_SYSTAB_TYPE_GAM_PARAMS       1       /* GAM PARAM conversions */
 84 #define UV_SYSTAB_TYPE_GAM_RNG_TBL      2       /* GAM entry table */
 85 #define UV_SYSTAB_TYPE_MAX              3
 86 
 87 /*
 88  * The UV system table describes specific firmware
 89  * capabilities available to the Linux kernel at runtime.
 90  */
 91 struct uv_systab {
 92         char signature[4];      /* must be UV_SYSTAB_SIG */
 93         u32 revision;           /* distinguish different firmware revs */
 94         u64 function;           /* BIOS runtime callback function ptr */
 95         u32 size;               /* systab size (starting with _VERSION_UV4) */
 96         struct {
 97                 u32 type:8;     /* type of entry */
 98                 u32 offset:24;  /* byte offset from struct start to entry */
 99         } entry[1];             /* additional entries follow */
100 };
101 extern struct uv_systab *uv_systab;
102 /* (... end of definitions from UV BIOS ...) */
103 
104 enum {
105         BIOS_FREQ_BASE_PLATFORM = 0,
106         BIOS_FREQ_BASE_INTERVAL_TIMER = 1,
107         BIOS_FREQ_BASE_REALTIME_CLOCK = 2
108 };
109 
110 union partition_info_u {
111         u64     val;
112         struct {
113                 u64     hub_version     :  8,
114                         partition_id    : 16,
115                         coherence_id    : 16,
116                         region_size     : 24;
117         };
118 };
119 
120 enum uv_memprotect {
121         UV_MEMPROT_RESTRICT_ACCESS,
122         UV_MEMPROT_ALLOW_AMO,
123         UV_MEMPROT_ALLOW_RW
124 };
125 
126 /*
127  * bios calls have 6 parameters
128  */
129 extern s64 uv_bios_call(enum uv_bios_cmd, u64, u64, u64, u64, u64);
130 extern s64 uv_bios_call_irqsave(enum uv_bios_cmd, u64, u64, u64, u64, u64);
131 
132 extern s64 uv_bios_get_sn_info(int, int *, long *, long *, long *, long *);
133 extern s64 uv_bios_freq_base(u64, u64 *);
134 extern int uv_bios_mq_watchlist_alloc(unsigned long, unsigned int,
135                                         unsigned long *);
136 extern int uv_bios_mq_watchlist_free(int, int);
137 extern s64 uv_bios_change_memprotect(u64, u64, enum uv_memprotect);
138 extern s64 uv_bios_reserved_page_pa(u64, u64 *, u64 *, u64 *);
139 extern int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus);
140 
141 extern void uv_bios_init(void);
142 
143 extern unsigned long sn_rtc_cycles_per_second;
144 extern int uv_type;
145 extern long sn_partition_id;
146 extern long sn_coherency_id;
147 extern long sn_region_size;
148 extern long system_serial_number;
149 #define uv_partition_coherence_id()     (sn_coherency_id)
150 
151 extern struct kobject *sgi_uv_kobj;     /* /sys/firmware/sgi_uv */
152 
153 /*
154  * EFI runtime lock; cf. firmware/efi/runtime-wrappers.c for details
155  */
156 extern struct semaphore __efi_uv_runtime_lock;
157 
158 #endif /* _ASM_X86_UV_BIOS_H */
159 

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