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 <linux/init.h> 24#include <asm/asmmacro.h> 25#include <asm/asm-offsets.h> 26#include <asm/paravirt_privop.h> 27#include <asm/paravirt_patch.h> 28#include "entry.h" 29 30#define DATA8(sym, init_value) \ 31 .pushsection .data..read_mostly ; \ 32 .align 8 ; \ 33 .global sym ; \ 34 sym: ; \ 35 data8 init_value ; \ 36 .popsection 37 38#define BRANCH(targ, reg, breg, type) \ 39 PARAVIRT_PATCH_SITE_BR(PARAVIRT_PATCH_TYPE_BR_ ## type) ; \ 40 ;; \ 41 movl reg=targ ; \ 42 ;; \ 43 ld8 reg=[reg] ; \ 44 ;; \ 45 mov breg=reg ; \ 46 br.cond.sptk.many breg 47 48#define BRANCH_PROC(sym, reg, breg, type) \ 49 DATA8(paravirt_ ## sym ## _targ, ia64_native_ ## sym) ; \ 50 GLOBAL_ENTRY(paravirt_ ## sym) ; \ 51 BRANCH(paravirt_ ## sym ## _targ, reg, breg, type) ; \ 52 END(paravirt_ ## sym) 53 54#define BRANCH_PROC_UNWINFO(sym, reg, breg, type) \ 55 DATA8(paravirt_ ## sym ## _targ, ia64_native_ ## sym) ; \ 56 GLOBAL_ENTRY(paravirt_ ## sym) ; \ 57 PT_REGS_UNWIND_INFO(0) ; \ 58 BRANCH(paravirt_ ## sym ## _targ, reg, breg, type) ; \ 59 END(paravirt_ ## sym) 60 61 62BRANCH_PROC(switch_to, r22, b7, SWITCH_TO) 63BRANCH_PROC_UNWINFO(leave_syscall, r22, b7, LEAVE_SYSCALL) 64BRANCH_PROC(work_processed_syscall, r2, b7, WORK_PROCESSED_SYSCALL) 65BRANCH_PROC_UNWINFO(leave_kernel, r22, b7, LEAVE_KERNEL) 66 67 68#ifdef CONFIG_MODULES 69#define __INIT_OR_MODULE .text 70#define __INITDATA_OR_MODULE .data 71#else 72#define __INIT_OR_MODULE __INIT 73#define __INITDATA_OR_MODULE __INITDATA 74#endif /* CONFIG_MODULES */ 75 76 __INIT_OR_MODULE 77 GLOBAL_ENTRY(paravirt_fc_i) 78 fc.i r32 79 br.ret.sptk.many rp 80 END(paravirt_fc_i) 81 __FINIT 82 83 __INIT_OR_MODULE 84 .align 32 85 GLOBAL_ENTRY(paravirt_nop_b_inst_bundle) 86 { 87 nop.b 0 88 nop.b 0 89 nop.b 0 90 } 91 END(paravirt_nop_b_inst_bundle) 92 __FINIT 93 94 /* NOTE: nop.[mfi] has same format */ 95 __INIT_OR_MODULE 96 GLOBAL_ENTRY(paravirt_nop_mfi_inst_bundle) 97 { 98 nop.m 0 99 nop.f 0 100 nop.i 0 101 } 102 END(paravirt_nop_mfi_inst_bundle) 103 __FINIT 104 105 __INIT_OR_MODULE 106 GLOBAL_ENTRY(paravirt_nop_bundle) 107paravirt_nop_bundle_start: 108 { 109 nop 0 110 nop 0 111 nop 0 112 } 113paravirt_nop_bundle_end: 114 END(paravirt_nop_bundle) 115 __FINIT 116 117 __INITDATA_OR_MODULE 118 .align 8 119 .global paravirt_nop_bundle_size 120paravirt_nop_bundle_size: 121 data8 paravirt_nop_bundle_end - paravirt_nop_bundle_start 122