arch/x86/include/asm/uv/uv.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_UV_UV_H
   3 #define _ASM_X86_UV_UV_H
   4
   5 #include <asm/tlbflush.h>
   6
   7 enum uv_system_type {UV_NONE, UV_LEGACY_APIC, UV_X2APIC, UV_NON_UNIQUE_APIC};
   8
   9 struct cpumask;
  10 struct mm_struct;
  11
  12 #ifdef CONFIG_X86_UV
  13 #include <linux/efi.h>
  14
  15 #define UV_PROC_NODE    "sgi_uv"
  16
  17 static inline int uv(int uvtype)
  18 {
  19         /* uv(0) is "any" */
  20         if (uvtype >= 0 && uvtype <= 30)
  21                 return 1 << uvtype;
  22         return 1;
  23 }
  24
  25 extern unsigned long uv_systab_phys;
  26
  27 extern enum uv_system_type get_uv_system_type(void);
  28 static inline bool is_early_uv_system(void)
  29 {
  30         return uv_systab_phys && uv_systab_phys != EFI_INVALID_TABLE_ADDR;
  31 }
  32 extern int is_uv_system(void);
  33 extern int is_uv_hubbed(int uvtype);
  34 extern int is_uv_hubless(int uvtype);
  35 extern void uv_cpu_init(void);
  36 extern void uv_nmi_init(void);
  37 extern void uv_system_init(void);
  38 extern const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
  39                                                  const struct flush_tlb_info *info);
  40
  41 #else   /* X86_UV */
  42
  43 static inline enum uv_system_type get_uv_system_type(void) { return UV_NONE; }
  44 static inline bool is_early_uv_system(void)     { return 0; }
  45 static inline int is_uv_system(void)    { return 0; }
  46 static inline int is_uv_hubbed(int uv)  { return 0; }
  47 static inline int is_uv_hubless(int uv) { return 0; }
  48 static inline void uv_cpu_init(void)    { }
  49 static inline void uv_system_init(void) { }
  50 static inline const struct cpumask *
  51 uv_flush_tlb_others(const struct cpumask *cpumask,
  52                     const struct flush_tlb_info *info)
  53 { return cpumask; }
  54
  55 #endif  /* X86_UV */
  56
  57 #endif  /* _ASM_X86_UV_UV_H */