[net-next-2.6.git] / arch / ia64 / kernel / paravirtentry.S

/******************************************************************************
 * 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
Commit	Line	Data
4df8d22b IY	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
03f511dd	23	#include <linux/init.h>
4df8d22b IY	24	#include <asm/asmmacro.h>
4df8d22b IY	25	#include <asm/asm-offsets.h>
03f511dd IY	26	#include <asm/paravirt_privop.h>
03f511dd IY	27	#include <asm/paravirt_patch.h>
4df8d22b IY	28	#include "entry.h"
	29
	30	#define DATA8(sym, init_value) \
54cb27a7	31	.pushsection .data..read_mostly ; \
4df8d22b IY	32	.align 8 ; \
	33	.global sym ; \
	34	sym: ; \
	35	data8 init_value ; \
	36	.popsection
	37
03f511dd IY	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 ; \
4df8d22b IY	46	br.cond.sptk.many breg
4df8d22b IY	47
03f511dd IY	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) ; \
4df8d22b IY	52	END(paravirt_ ## sym)
4df8d22b IY	53
03f511dd IY	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) ; \
4df8d22b IY	59	END(paravirt_ ## sym)
	60
	61
03f511dd IY	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)
bf7ab02f IY	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