arch/powerpc/mm/icswx.h

   1 #ifndef _ARCH_POWERPC_MM_ICSWX_H_
   2 #define _ARCH_POWERPC_MM_ICSWX_H_
   3
   4 /*
   5  *  ICSWX and ACOP Management
   6  *
   7  *  Copyright (C) 2011 Anton Blanchard, IBM Corp. <anton@samba.org>
   8  *
   9  *  This program is free software; you can redistribute it and/or
  10  *  modify it under the terms of the GNU General Public License
  11  *  as published by the Free Software Foundation; either version
  12  *  2 of the License, or (at your option) any later version.
  13  *
  14  */
  15
  16 #include <asm/mmu_context.h>
  17
  18 /* also used to denote that PIDs are not used */
  19 #define COP_PID_NONE 0
  20
  21 static inline void sync_cop(void *arg)
  22 {
  23         struct mm_struct *mm = arg;
  24
  25         if (mm == current->active_mm)
  26                 switch_cop(current->active_mm);
  27 }
  28
  29 #ifdef CONFIG_PPC_ICSWX_PID
  30 extern int get_cop_pid(struct mm_struct *mm);
  31 extern int disable_cop_pid(struct mm_struct *mm);
  32 extern void free_cop_pid(int free_pid);
  33 #else
  34 #define get_cop_pid(m) (COP_PID_NONE)
  35 #define disable_cop_pid(m) (COP_PID_NONE)
  36 #define free_cop_pid(p)
  37 #endif
  38
  39 /*
  40  * These are implementation bits for architected registers.  If this
  41  * ever becomes architecture the should be moved to reg.h et. al.
  42  */
  43 /* UCT is the same bit for Server and Embedded */
  44 #define ICSWX_DSI_UCT           0x00004000  /* Unavailable Coprocessor Type */
  45
  46 #ifdef CONFIG_PPC_BOOK3E
  47 /* Embedded implementation gives us no hints as to what the CT is */
  48 #define ICSWX_GET_CT_HINT(x) (-1)
  49 #else
  50 /* Server implementation contains the CT value in the DSISR */
  51 #define ICSWX_DSISR_CTMASK      0x00003f00
  52 #define ICSWX_GET_CT_HINT(x)    (((x) & ICSWX_DSISR_CTMASK) >> 8)
  53 #endif
  54
  55 #define ICSWX_RC_STARTED        0x8     /* The request has been started */
  56 #define ICSWX_RC_NOT_IDLE       0x4     /* No coprocessor found idle */
  57 #define ICSWX_RC_NOT_FOUND      0x2     /* No coprocessor found */
  58 #define ICSWX_RC_UNDEFINED      0x1     /* Reserved */
  59
  60 extern int acop_handle_fault(struct pt_regs *regs, unsigned long address,
  61                              unsigned long error_code);
  62
  63 static inline u64 acop_copro_type_bit(unsigned int type)
  64 {
  65         return 1ULL << (63 - type);
  66 }
  67
  68 #endif /* !_ARCH_POWERPC_MM_ICSWX_H_ */