/******************************************************************************
   * linux/arch/ia64/xen/paravirtentry.S
   *
   * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
   *                    VA Linux Systems Japan K.K.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   */

  #include <linux/init.h>

  #include <asm/asmmacro.h>
  #include <asm/asm-offsets.h>

  #include <asm/paravirt_privop.h>
  #include <asm/paravirt_patch.h>

  #include "entry.h"
  
  #define DATA8(sym, init_value)			\

  	.pushsection .data..read_mostly ;	\

  	.align 8 ;				\
  	.global sym ;				\
  	sym: ;					\
  	data8 init_value ;			\
  	.popsection

  #define BRANCH(targ, reg, breg, type)					\
  	PARAVIRT_PATCH_SITE_BR(PARAVIRT_PATCH_TYPE_BR_ ## type) ;	\
  	;;								\
  	movl reg=targ ;							\
  	;;								\
  	ld8 reg=[reg] ;							\
  	;;								\
  	mov breg=reg ;							\

  	br.cond.sptk.many breg

  #define BRANCH_PROC(sym, reg, breg, type)				\
  	DATA8(paravirt_ ## sym ## _targ, ia64_native_ ## sym) ;		\
  	GLOBAL_ENTRY(paravirt_ ## sym) ;				\
  		BRANCH(paravirt_ ## sym ## _targ, reg, breg, type) ;	\

  	END(paravirt_ ## sym)

  #define BRANCH_PROC_UNWINFO(sym, reg, breg, type)			\
  	DATA8(paravirt_ ## sym ## _targ, ia64_native_ ## sym) ;		\
  	GLOBAL_ENTRY(paravirt_ ## sym) ;				\
  		PT_REGS_UNWIND_INFO(0) ;				\
  		BRANCH(paravirt_ ## sym ## _targ, reg, breg, type) ;	\

  	END(paravirt_ ## sym)

  BRANCH_PROC(switch_to, r22, b7, SWITCH_TO)
  BRANCH_PROC_UNWINFO(leave_syscall, r22, b7, LEAVE_SYSCALL)
  BRANCH_PROC(work_processed_syscall, r2, b7, WORK_PROCESSED_SYSCALL)
  BRANCH_PROC_UNWINFO(leave_kernel, r22, b7, LEAVE_KERNEL)

  
  
  #ifdef CONFIG_MODULES
  #define __INIT_OR_MODULE	.text
  #define __INITDATA_OR_MODULE	.data
  #else
  #define __INIT_OR_MODULE	__INIT
  #define __INITDATA_OR_MODULE	__INITDATA
  #endif /* CONFIG_MODULES */
  
  	__INIT_OR_MODULE
  	GLOBAL_ENTRY(paravirt_fc_i)
  	fc.i r32
  	br.ret.sptk.many rp
  	END(paravirt_fc_i)
  	__FINIT
  
  	__INIT_OR_MODULE
  	.align 32
  	GLOBAL_ENTRY(paravirt_nop_b_inst_bundle)
  	{
  		nop.b 0
  		nop.b 0
  		nop.b 0
  	}
  	END(paravirt_nop_b_inst_bundle)
  	__FINIT
  
  	/* NOTE: nop.[mfi] has same format */
  	__INIT_OR_MODULE
  	GLOBAL_ENTRY(paravirt_nop_mfi_inst_bundle)
  	{
  		nop.m 0
  		nop.f 0
  		nop.i 0
  	}
  	END(paravirt_nop_mfi_inst_bundle)
  	__FINIT
  
  	__INIT_OR_MODULE
  	GLOBAL_ENTRY(paravirt_nop_bundle)
  paravirt_nop_bundle_start:
  	{
  		nop 0
  		nop 0
  		nop 0
  	}
  paravirt_nop_bundle_end:
  	END(paravirt_nop_bundle)
  	__FINIT
  
  	__INITDATA_OR_MODULE
  	.align 8
  	.global paravirt_nop_bundle_size
  paravirt_nop_bundle_size:
  	data8	paravirt_nop_bundle_end - paravirt_nop_bundle_start