[net-next-2.6.git] / arch / mips / include / asm / paccess.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1996, 1997, 1998, 1999, 2000 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 *
 * Protected memory access.  Used for everything that might take revenge
 * by sending a DBE error like accessing possibly non-existant memory or
 * devices.
 */
#ifndef _ASM_PACCESS_H
#define _ASM_PACCESS_H

#include <linux/errno.h>

#ifdef CONFIG_32BIT
#define __PA_ADDR	".word"
#endif
#ifdef CONFIG_64BIT
#define __PA_ADDR	".dword"
#endif

extern asmlinkage void handle_ibe(void);
extern asmlinkage void handle_dbe(void);

#define put_dbe(x, ptr) __put_dbe((x), (ptr), sizeof(*(ptr)))
#define get_dbe(x, ptr) __get_dbe((x), (ptr), sizeof(*(ptr)))

struct __large_pstruct { unsigned long buf[100]; };
#define __mp(x) (*(struct __large_pstruct *)(x))

#define __get_dbe(x, ptr, size)						\
({									\
	long __gu_err;							\
	__typeof__(*(ptr)) __gu_val;					\
	unsigned long __gu_addr;					\
	__asm__("":"=r" (__gu_val));					\
	__gu_addr = (unsigned long) (ptr);				\
	__asm__("":"=r" (__gu_err));					\
	switch (size) {							\
	case 1: __get_dbe_asm("lb"); break;				\
	case 2: __get_dbe_asm("lh"); break;				\
	case 4: __get_dbe_asm("lw"); break;				\
	case 8:  __get_dbe_asm("ld"); break;				\
	default: __get_dbe_unknown(); break;				\
	}								\
	x = (__typeof__(*(ptr))) __gu_val;				\
	__gu_err;							\
})

#define __get_dbe_asm(insn)						\
{									\
	__asm__ __volatile__(						\
	"1:\t" insn "\t%1,%2\n\t"					\
	"move\t%0,$0\n"							\
	"2:\n\t"							\
	".section\t.fixup,\"ax\"\n"					\
	"3:\tli\t%0,%3\n\t"						\
	"move\t%1,$0\n\t"						\
	"j\t2b\n\t"							\
	".previous\n\t"							\
	".section\t__dbe_table,\"a\"\n\t"				\
	__PA_ADDR "\t1b, 3b\n\t"					\
	".previous"							\
	:"=r" (__gu_err), "=r" (__gu_val)				\
	:"o" (__mp(__gu_addr)), "i" (-EFAULT));				\
}

extern void __get_dbe_unknown(void);

#define __put_dbe(x, ptr, size)						\
({									\
	long __pu_err;							\
	__typeof__(*(ptr)) __pu_val;					\
	long __pu_addr;							\
	__pu_val = (x);							\
	__pu_addr = (long) (ptr);					\
	__asm__("":"=r" (__pu_err));					\
	switch (size) {							\
	case 1: __put_dbe_asm("sb"); break;				\
	case 2: __put_dbe_asm("sh"); break;				\
	case 4: __put_dbe_asm("sw"); break;				\
	case 8: __put_dbe_asm("sd"); break;				\
	default: __put_dbe_unknown(); break;				\
	}								\
	__pu_err;							\
})

#define __put_dbe_asm(insn)						\
{									\
	__asm__ __volatile__(						\
	"1:\t" insn "\t%1,%2\n\t"					\
	"move\t%0,$0\n"							\
	"2:\n\t"							\
	".section\t.fixup,\"ax\"\n"					\
	"3:\tli\t%0,%3\n\t"						\
	"j\t2b\n\t"							\
	".previous\n\t"							\
	".section\t__dbe_table,\"a\"\n\t"				\
	__PA_ADDR "\t1b, 3b\n\t"					\
	".previous"							\
	: "=r" (__pu_err)						\
	: "r" (__pu_val), "o" (__mp(__pu_addr)), "i" (-EFAULT));	\
}

extern void __put_dbe_unknown(void);

extern unsigned long search_dbe_table(unsigned long addr);

#endif /* _ASM_PACCESS_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 1996, 1997, 1998, 1999, 2000 by Ralf Baechle
	7	* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
	8	*
	9	* Protected memory access. Used for everything that might take revenge
	10	* by sending a DBE error like accessing possibly non-existant memory or
	11	* devices.
	12	*/
	13	#ifndef _ASM_PACCESS_H
	14	#define _ASM_PACCESS_H
	15
1da177e4 LT	16	#include <linux/errno.h>
1da177e4 LT	17
875d43e7	18	#ifdef CONFIG_32BIT
1da177e4 LT	19	#define __PA_ADDR ".word"
1da177e4 LT	20	#endif
875d43e7	21	#ifdef CONFIG_64BIT
1da177e4 LT	22	#define __PA_ADDR ".dword"
	23	#endif
	24
	25	extern asmlinkage void handle_ibe(void);
	26	extern asmlinkage void handle_dbe(void);
	27
21a151d8 RB	28	#define put_dbe(x, ptr) __put_dbe((x), (ptr), sizeof(*(ptr)))
21a151d8 RB	29	#define get_dbe(x, ptr) __get_dbe((x), (ptr), sizeof(*(ptr)))
1da177e4 LT	30
	31	struct __large_pstruct { unsigned long buf[100]; };
	32	#define __mp(x) ((struct __large_pstruct )(x))
	33
21a151d8	34	#define __get_dbe(x, ptr, size) \
1da177e4 LT	35	({ \
1da177e4 LT	36	long __gu_err; \
a4c9bb7d	37	__typeof__(*(ptr)) __gu_val; \
1da177e4 LT	38	unsigned long __gu_addr; \
	39	__asm__("":"=r" (__gu_val)); \
	40	__gu_addr = (unsigned long) (ptr); \
	41	__asm__("":"=r" (__gu_err)); \
	42	switch (size) { \
	43	case 1: __get_dbe_asm("lb"); break; \
	44	case 2: __get_dbe_asm("lh"); break; \
	45	case 4: __get_dbe_asm("lw"); break; \
	46	case 8: __get_dbe_asm("ld"); break; \
	47	default: __get_dbe_unknown(); break; \
	48	} \
	49	x = (__typeof__(*(ptr))) __gu_val; \
	50	__gu_err; \
	51	})
	52
	53	#define __get_dbe_asm(insn) \
77c728c2	54	{ \
1da177e4 LT	55	__asm__ __volatile__( \
	56	"1:\t" insn "\t%1,%2\n\t" \
	57	"move\t%0,$0\n" \
	58	"2:\n\t" \
	59	".section\t.fixup,\"ax\"\n" \
	60	"3:\tli\t%0,%3\n\t" \
	61	"move\t%1,$0\n\t" \
	62	"j\t2b\n\t" \
	63	".previous\n\t" \
	64	".section\t__dbe_table,\"a\"\n\t" \
	65	__PA_ADDR "\t1b, 3b\n\t" \
	66	".previous" \
	67	:"=r" (__gu_err), "=r" (__gu_val) \
	68	:"o" (__mp(__gu_addr)), "i" (-EFAULT)); \
77c728c2	69	}
1da177e4 LT	70
	71	extern void __get_dbe_unknown(void);
	72
21a151d8	73	#define __put_dbe(x, ptr, size) \
1da177e4 LT	74	({ \
	75	long __pu_err; \
	76	__typeof__(*(ptr)) __pu_val; \
	77	long __pu_addr; \
	78	__pu_val = (x); \
	79	__pu_addr = (long) (ptr); \
	80	__asm__("":"=r" (__pu_err)); \
	81	switch (size) { \
	82	case 1: __put_dbe_asm("sb"); break; \
	83	case 2: __put_dbe_asm("sh"); break; \
	84	case 4: __put_dbe_asm("sw"); break; \
	85	case 8: __put_dbe_asm("sd"); break; \
	86	default: __put_dbe_unknown(); break; \
	87	} \
	88	__pu_err; \
	89	})
	90
	91	#define __put_dbe_asm(insn) \
77c728c2	92	{ \
1da177e4 LT	93	__asm__ __volatile__( \
	94	"1:\t" insn "\t%1,%2\n\t" \
	95	"move\t%0,$0\n" \
	96	"2:\n\t" \
	97	".section\t.fixup,\"ax\"\n" \
	98	"3:\tli\t%0,%3\n\t" \
	99	"j\t2b\n\t" \
	100	".previous\n\t" \
	101	".section\t__dbe_table,\"a\"\n\t" \
	102	__PA_ADDR "\t1b, 3b\n\t" \
	103	".previous" \
	104	: "=r" (__pu_err) \
	105	: "r" (__pu_val), "o" (__mp(__pu_addr)), "i" (-EFAULT)); \
77c728c2	106	}
1da177e4 LT	107
	108	extern void __put_dbe_unknown(void);
	109
	110	extern unsigned long search_dbe_table(unsigned long addr);
	111
	112	#endif /* _ASM_PACCESS_H */