| Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame^] | 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 | |
| 57 | BRANCH_PROC(switch_to, r22, b7) |
| 58 | BRANCH_PROC_UNWINFO(leave_syscall, r22, b7) |
| 59 | BRANCH_PROC(work_processed_syscall, r2, b7) |
| 60 | BRANCH_PROC_UNWINFO(leave_kernel, r22, b7) |