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 | |
Isaku Yamahata | 03f511d | 2009-03-04 21:06:52 +0900 | [diff] [blame] | 23 | #include <linux/init.h> |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 24 | #include <asm/asmmacro.h> |
| 25 | #include <asm/asm-offsets.h> |
Isaku Yamahata | 03f511d | 2009-03-04 21:06:52 +0900 | [diff] [blame] | 26 | #include <asm/paravirt_privop.h> |
| 27 | #include <asm/paravirt_patch.h> |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 28 | #include "entry.h" |
| 29 | |
| 30 | #define DATA8(sym, init_value) \ |
Denys Vlasenko | 54cb27a | 2010-02-20 01:03:44 +0100 | [diff] [blame] | 31 | .pushsection .data..read_mostly ; \ |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 32 | .align 8 ; \ |
| 33 | .global sym ; \ |
| 34 | sym: ; \ |
| 35 | data8 init_value ; \ |
| 36 | .popsection |
| 37 | |
Isaku Yamahata | 03f511d | 2009-03-04 21:06:52 +0900 | [diff] [blame] | 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 ; \ |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 46 | br.cond.sptk.many breg |
| 47 | |
Isaku Yamahata | 03f511d | 2009-03-04 21:06:52 +0900 | [diff] [blame] | 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) ; \ |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 52 | END(paravirt_ ## sym) |
| 53 | |
Isaku Yamahata | 03f511d | 2009-03-04 21:06:52 +0900 | [diff] [blame] | 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) ; \ |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 59 | END(paravirt_ ## sym) |
| 60 | |
| 61 | |
Isaku Yamahata | 03f511d | 2009-03-04 21:06:52 +0900 | [diff] [blame] | 62 | BRANCH_PROC(switch_to, r22, b7, SWITCH_TO) |
| 63 | BRANCH_PROC_UNWINFO(leave_syscall, r22, b7, LEAVE_SYSCALL) |
| 64 | BRANCH_PROC(work_processed_syscall, r2, b7, WORK_PROCESSED_SYSCALL) |
| 65 | BRANCH_PROC_UNWINFO(leave_kernel, r22, b7, LEAVE_KERNEL) |
Isaku Yamahata | bf7ab02 | 2009-03-04 21:06:51 +0900 | [diff] [blame] | 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) |
| 107 | paravirt_nop_bundle_start: |
| 108 | { |
| 109 | nop 0 |
| 110 | nop 0 |
| 111 | nop 0 |
| 112 | } |
| 113 | paravirt_nop_bundle_end: |
| 114 | END(paravirt_nop_bundle) |
| 115 | __FINIT |
| 116 | |
| 117 | __INITDATA_OR_MODULE |
| 118 | .align 8 |
| 119 | .global paravirt_nop_bundle_size |
| 120 | paravirt_nop_bundle_size: |
| 121 | data8 paravirt_nop_bundle_end - paravirt_nop_bundle_start |