include/asm-ia64/paravirt_privop.h

   1 /******************************************************************************
   2  * include/asm-ia64/paravirt_privops.h
   3  *
   4  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
   5  *                    VA Linux Systems Japan K.K.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22
  23 #ifndef _ASM_IA64_PARAVIRT_PRIVOP_H
  24 #define _ASM_IA64_PARAVIRT_PRIVOP_H
  25
  26 #ifdef CONFIG_PARAVIRT
  27
  28 #ifndef __ASSEMBLY__
  29
  30 #include <linux/types.h>
  31 #include <asm/kregs.h> /* for IA64_PSR_I */
  32
  33 /******************************************************************************
  34  * replacement of intrinsics operations.
  35  */
  36
  37 struct pv_cpu_ops {
  38         void (*fc)(unsigned long addr);
  39         unsigned long (*thash)(unsigned long addr);
  40         unsigned long (*get_cpuid)(int index);
  41         unsigned long (*get_pmd)(int index);
  42         unsigned long (*getreg)(int reg);
  43         void (*setreg)(int reg, unsigned long val);
  44         void (*ptcga)(unsigned long addr, unsigned long size);
  45         unsigned long (*get_rr)(unsigned long index);
  46         void (*set_rr)(unsigned long index, unsigned long val);
  47         void (*set_rr0_to_rr4)(unsigned long val0, unsigned long val1,
  48                                unsigned long val2, unsigned long val3,
  49                                unsigned long val4);
  50         void (*ssm_i)(void);
  51         void (*rsm_i)(void);
  52         unsigned long (*get_psr_i)(void);
  53         void (*intrin_local_irq_restore)(unsigned long flags);
  54 };
  55
  56 extern struct pv_cpu_ops pv_cpu_ops;
  57
  58 extern void ia64_native_setreg_func(int regnum, unsigned long val);
  59 extern unsigned long ia64_native_getreg_func(int regnum);
  60
  61 /************************************************/
  62 /* Instructions paravirtualized for performance */
  63 /************************************************/
  64
  65 /* mask for ia64_native_ssm/rsm() must be constant.("i" constraing).
  66  * static inline function doesn't satisfy it. */
  67 #define paravirt_ssm(mask)                      \
  68         do {                                    \
  69                 if ((mask) == IA64_PSR_I)       \
  70                         pv_cpu_ops.ssm_i();     \
  71                 else                            \
  72                         ia64_native_ssm(mask);  \
  73         } while (0)
  74
  75 #define paravirt_rsm(mask)                      \
  76         do {                                    \
  77                 if ((mask) == IA64_PSR_I)       \
  78                         pv_cpu_ops.rsm_i();     \
  79                 else                            \
  80                         ia64_native_rsm(mask);  \
  81         } while (0)
  82
  83 /******************************************************************************
  84  * replacement of hand written assembly codes.
  85  */
  86 struct pv_cpu_asm_switch {
  87         unsigned long switch_to;
  88         unsigned long leave_syscall;
  89         unsigned long work_processed_syscall;
  90         unsigned long leave_kernel;
  91 };
  92 void paravirt_cpu_asm_init(const struct pv_cpu_asm_switch *cpu_asm_switch);
  93
  94 #endif /* __ASSEMBLY__ */
  95
  96 #define IA64_PARAVIRT_ASM_FUNC(name)    paravirt_ ## name
  97
  98 #else
  99
 100 /* fallback for native case */
 101 #define IA64_PARAVIRT_ASM_FUNC(name)    ia64_native_ ## name
 102
 103 #endif /* CONFIG_PARAVIRT */
 104
 105 /* these routines utilize privilege-sensitive or performance-sensitive
 106  * privileged instructions so the code must be replaced with
 107  * paravirtualized versions */
 108 #define ia64_switch_to                  IA64_PARAVIRT_ASM_FUNC(switch_to)
 109 #define ia64_leave_syscall              IA64_PARAVIRT_ASM_FUNC(leave_syscall)
 110 #define ia64_work_processed_syscall     \
 111         IA64_PARAVIRT_ASM_FUNC(work_processed_syscall)
 112 #define ia64_leave_kernel               IA64_PARAVIRT_ASM_FUNC(leave_kernel)
 113
 114 #endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */