release/src-rt-6.x.4708/linux/linux-2.6.36/arch/ia64/kernel/paravirt_patchlist.c

   1 /******************************************************************************
   2  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
   3  *                    VA Linux Systems Japan K.K.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <linux/bug.h>
  22 #include <linux/init.h>
  23 #include <linux/kernel.h>
  24 #include <asm/paravirt.h>
  25
  26 #define DECLARE(name)                                           \
  27         extern unsigned long                                    \
  28                 __ia64_native_start_gate_##name##_patchlist[];  \
  29         extern unsigned long                                    \
  30                 __ia64_native_end_gate_##name##_patchlist[]
  31
  32 DECLARE(fsyscall);
  33 DECLARE(brl_fsys_bubble_down);
  34 DECLARE(vtop);
  35 DECLARE(mckinley_e9);
  36
  37 extern unsigned long __start_gate_section[];
  38
  39 #define ASSIGN(name)                                                        \
  40         .start_##name##_patchlist =                                         \
  41                 (unsigned long)__ia64_native_start_gate_##name##_patchlist, \
  42         .end_##name##_patchlist =                                           \
  43                 (unsigned long)__ia64_native_end_gate_##name##_patchlist
  44
  45 struct pv_patchdata pv_patchdata __initdata = {
  46         ASSIGN(fsyscall),
  47         ASSIGN(brl_fsys_bubble_down),
  48         ASSIGN(vtop),
  49         ASSIGN(mckinley_e9),
  50
  51         .gate_section = (void*)__start_gate_section,
  52 };
  53
  54
  55 unsigned long __init
  56 paravirt_get_gate_patchlist(enum pv_gate_patchlist type)
  57 {
  58
  59 #define CASE(NAME, name)                                        \
  60         case PV_GATE_START_##NAME:                              \
  61                 return pv_patchdata.start_##name##_patchlist;   \
  62         case PV_GATE_END_##NAME:                                \
  63                 return pv_patchdata.end_##name##_patchlist;     \
  64
  65         switch (type) {
  66                 CASE(FSYSCALL, fsyscall);
  67                 CASE(BRL_FSYS_BUBBLE_DOWN, brl_fsys_bubble_down);
  68                 CASE(VTOP, vtop);
  69                 CASE(MCKINLEY_E9, mckinley_e9);
  70         default:
  71                 BUG();
  72                 break;
  73         }
  74         return 0;
  75 }
  76
  77 void * __init
  78 paravirt_get_gate_section(void)
  79 {
  80         return pv_patchdata.gate_section;
  81 }