LXR linux/arch/ia64/kernel/paravirt

   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
  32DECLARE(fsyscall);
  33DECLARE(brl_fsys_bubble_down);
  34DECLARE(vtop);
  35DECLARE(mckinley_e9);
  36
  37extern 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
  45struct 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
  55unsigned long __init
  56paravirt_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
  77void * __init
  78paravirt_get_gate_section(void)
  79{
  80        return pv_patchdata.gate_section;
  81}
  82