1/****************************************************************************** 2 * linux/arch/ia64/xen/paravirtentry.S 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#include <asm/asmmacro.h> 24#include <asm/asm-offsets.h> 25#include "entry.h" 26 27#define DATA8(sym, init_value) \ 28 .pushsection .data.read_mostly ; \ 29 .align 8 ; \ 30 .global sym ; \ 31 sym: ; \ 32 data8 init_value ; \ 33 .popsection 34 35#define BRANCH(targ, reg, breg) \ 36 movl reg=targ ; \ 37 ;; \ 38 ld8 reg=[reg] ; \ 39 ;; \ 40 mov breg=reg ; \ 41 br.cond.sptk.many breg 42 43#define BRANCH_PROC(sym, reg, breg) \ 44 DATA8(paravirt_ ## sym ## _targ, ia64_native_ ## sym) ; \ 45 GLOBAL_ENTRY(paravirt_ ## sym) ; \ 46 BRANCH(paravirt_ ## sym ## _targ, reg, breg) ; \ 47 END(paravirt_ ## sym) 48 49#define BRANCH_PROC_UNWINFO(sym, reg, breg) \ 50 DATA8(paravirt_ ## sym ## _targ, ia64_native_ ## sym) ; \ 51 GLOBAL_ENTRY(paravirt_ ## sym) ; \ 52 PT_REGS_UNWIND_INFO(0) ; \ 53 BRANCH(paravirt_ ## sym ## _targ, reg, breg) ; \ 54 END(paravirt_ ## sym) 55 56 57BRANCH_PROC(switch_to, r22, b7) 58BRANCH_PROC_UNWINFO(leave_syscall, r22, b7) 59BRANCH_PROC(work_processed_syscall, r2, b7) 60BRANCH_PROC_UNWINFO(leave_kernel, r22, b7) 61