[linux-2.6-block.git] / arch / powerpc / include / asm / exception-64s.h

#ifndef _ASM_POWERPC_EXCEPTION_H
#define _ASM_POWERPC_EXCEPTION_H
/*
 * Extracted from head_64.S
 *
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 *  Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
 *    Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
 *  Adapted for Power Macintosh by Paul Mackerras.
 *  Low-level exception handlers and MMU support
 *  rewritten by Paul Mackerras.
 *    Copyright (C) 1996 Paul Mackerras.
 *
 *  Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
 *    Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com
 *
 *  This file contains the low-level support and setup for the
 *  PowerPC-64 platform, including trap and interrupt dispatch.
 *
 *  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.
 */
/*
 * The following macros define the code that appears as
 * the prologue to each of the exception handlers.  They
 * are split into two parts to allow a single kernel binary
 * to be used for pSeries and iSeries.
 *
 * We make as much of the exception code common between native
 * exception handlers (including pSeries LPAR) and iSeries LPAR
 * implementations as possible.
 */
#include <asm/feature-fixups.h>

/* PACA save area size in u64 units (exgen, exmc, etc) */
#if defined(CONFIG_RELOCATABLE)
#define EX_SIZE		10
#else
#define EX_SIZE		9
#endif

/*
 * maximum recursive depth of MCE exceptions
 */
#define MAX_MCE_DEPTH	4

#ifdef __ASSEMBLY__

#define STF_ENTRY_BARRIER_SLOT						\
	STF_ENTRY_BARRIER_FIXUP_SECTION;				\
	nop;								\
	nop;								\
	nop

#define STF_EXIT_BARRIER_SLOT						\
	STF_EXIT_BARRIER_FIXUP_SECTION;					\
	nop;								\
	nop;								\
	nop;								\
	nop;								\
	nop;								\
	nop

/*
 * r10 must be free to use, r13 must be paca
 */
#define INTERRUPT_TO_KERNEL						\
	STF_ENTRY_BARRIER_SLOT

/*
 * Macros for annotating the expected destination of (h)rfid
 *
 * The nop instructions allow us to insert one or more instructions to flush the
 * L1-D cache when returning to userspace or a guest.
 */
#define RFI_FLUSH_SLOT							\
	RFI_FLUSH_FIXUP_SECTION;					\
	nop;								\
	nop;								\
	nop

#define RFI_TO_KERNEL							\
	rfid

#define RFI_TO_USER							\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	rfid;								\
	b	rfi_flush_fallback

#define RFI_TO_USER_OR_KERNEL						\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	rfid;								\
	b	rfi_flush_fallback

#define RFI_TO_GUEST							\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	rfid;								\
	b	rfi_flush_fallback

#define HRFI_TO_KERNEL							\
	hrfid

#define HRFI_TO_USER							\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	hrfid;								\
	b	hrfi_flush_fallback

#define HRFI_TO_USER_OR_KERNEL						\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	hrfid;								\
	b	hrfi_flush_fallback

#define HRFI_TO_GUEST							\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	hrfid;								\
	b	hrfi_flush_fallback

#define HRFI_TO_UNKNOWN							\
	STF_EXIT_BARRIER_SLOT;						\
	RFI_FLUSH_SLOT;							\
	hrfid;								\
	b	hrfi_flush_fallback

#endif /* __ASSEMBLY__ */

#endif	/* _ASM_POWERPC_EXCEPTION_H */
Commit	Line	Data
f9ff0f30 SR	1	#ifndef _ASM_POWERPC_EXCEPTION_H
	2	#define _ASM_POWERPC_EXCEPTION_H
	3	/*
	4	* Extracted from head_64.S
	5	*
	6	* PowerPC version
	7	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	8	*
	9	* Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
	10	* Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
	11	* Adapted for Power Macintosh by Paul Mackerras.
	12	* Low-level exception handlers and MMU support
	13	* rewritten by Paul Mackerras.
	14	* Copyright (C) 1996 Paul Mackerras.
	15	*
	16	* Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
	17	* Mike Corrigan {engebret\|bergner\|mikejc}@us.ibm.com
	18	*
	19	* This file contains the low-level support and setup for the
	20	* PowerPC-64 platform, including trap and interrupt dispatch.
	21	*
	22	* This program is free software; you can redistribute it and/or
	23	* modify it under the terms of the GNU General Public License
	24	* as published by the Free Software Foundation; either version
	25	* 2 of the License, or (at your option) any later version.
	26	*/
	27	/*
	28	* The following macros define the code that appears as
	29	* the prologue to each of the exception handlers. They
	30	* are split into two parts to allow a single kernel binary
	31	* to be used for pSeries and iSeries.
	32	*
	33	* We make as much of the exception code common between native
	34	* exception handlers (including pSeries LPAR) and iSeries LPAR
	35	* implementations as possible.
	36	*/
2c86cd18	37	#include <asm/feature-fixups.h>
f9ff0f30	38
15820091	39	/* PACA save area size in u64 units (exgen, exmc, etc) */
8568f1e0	40	#if defined(CONFIG_RELOCATABLE)
15820091	41	#define EX_SIZE 10
8568f1e0	42	#else
15820091	43	#define EX_SIZE 9
8568f1e0	44	#endif
dbeea1d6	45
ba41e1e1 BS	46	/*
	47	* maximum recursive depth of MCE exceptions
	48	*/
	49	#define MAX_MCE_DEPTH 4
	50
4508a74a NP	51	#ifdef __ASSEMBLY__
4508a74a NP	52
a048a07d NP	53	#define STF_ENTRY_BARRIER_SLOT \
	54	STF_ENTRY_BARRIER_FIXUP_SECTION; \
	55	nop; \
	56	nop; \
	57	nop
	58
	59	#define STF_EXIT_BARRIER_SLOT \
	60	STF_EXIT_BARRIER_FIXUP_SECTION; \
	61	nop; \
	62	nop; \
	63	nop; \
	64	nop; \
	65	nop; \
	66	nop
	67
	68	/*
	69	* r10 must be free to use, r13 must be paca
	70	*/
	71	#define INTERRUPT_TO_KERNEL \
	72	STF_ENTRY_BARRIER_SLOT
	73
aa8a5e00 ME	74	/*
	75	* Macros for annotating the expected destination of (h)rfid
	76	*
	77	* The nop instructions allow us to insert one or more instructions to flush the
	78	* L1-D cache when returning to userspace or a guest.
	79	*/
	80	#define RFI_FLUSH_SLOT \
	81	RFI_FLUSH_FIXUP_SECTION; \
	82	nop; \
	83	nop; \
	84	nop
50e51c13 NP	85
	86	#define RFI_TO_KERNEL \
	87	rfid
	88
	89	#define RFI_TO_USER \
a048a07d	90	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	91	RFI_FLUSH_SLOT; \
	92	rfid; \
	93	b rfi_flush_fallback
50e51c13 NP	94
50e51c13 NP	95	#define RFI_TO_USER_OR_KERNEL \
a048a07d	96	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	97	RFI_FLUSH_SLOT; \
	98	rfid; \
	99	b rfi_flush_fallback
50e51c13 NP	100
50e51c13 NP	101	#define RFI_TO_GUEST \
a048a07d	102	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	103	RFI_FLUSH_SLOT; \
	104	rfid; \
	105	b rfi_flush_fallback
50e51c13 NP	106
	107	#define HRFI_TO_KERNEL \
	108	hrfid
	109
	110	#define HRFI_TO_USER \
a048a07d	111	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	112	RFI_FLUSH_SLOT; \
	113	hrfid; \
	114	b hrfi_flush_fallback
50e51c13 NP	115
50e51c13 NP	116	#define HRFI_TO_USER_OR_KERNEL \
a048a07d	117	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	118	RFI_FLUSH_SLOT; \
	119	hrfid; \
	120	b hrfi_flush_fallback
50e51c13 NP	121
50e51c13 NP	122	#define HRFI_TO_GUEST \
a048a07d	123	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	124	RFI_FLUSH_SLOT; \
	125	hrfid; \
	126	b hrfi_flush_fallback
50e51c13 NP	127
50e51c13 NP	128	#define HRFI_TO_UNKNOWN \
a048a07d	129	STF_EXIT_BARRIER_SLOT; \
aa8a5e00 ME	130	RFI_FLUSH_SLOT; \
	131	hrfid; \
	132	b hrfi_flush_fallback
50e51c13	133
4508a74a NP	134	#endif /* __ASSEMBLY__ */
4508a74a NP	135
f9ff0f30	136	#endif /* _ASM_POWERPC_EXCEPTION_H */