[qemu.git] / thunk.h

/*
 *  Generic thunking code to convert data between host and target CPU
 * 
 *  Copyright (c) 2003 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef THUNK_H
#define THUNK_H

#include <inttypes.h>
#include "cpu.h"

/* types enums definitions */

typedef enum argtype {
    TYPE_NULL,
    TYPE_CHAR,
    TYPE_SHORT,
    TYPE_INT,
    TYPE_LONG,
    TYPE_ULONG,
    TYPE_PTRVOID, /* pointer on unknown data */
    TYPE_LONGLONG,
    TYPE_ULONGLONG,
    TYPE_PTR,
    TYPE_ARRAY,
    TYPE_STRUCT,
} argtype;

#define MK_PTR(type) TYPE_PTR, type
#define MK_ARRAY(type, size) TYPE_ARRAY, size, type
#define MK_STRUCT(id) TYPE_STRUCT, id

#define THUNK_TARGET 0
#define THUNK_HOST   1

typedef struct {
    /* standard struct handling */
    const argtype *field_types;
    int nb_fields;
    int *field_offsets[2];
    /* special handling */
    void (*convert[2])(void *dst, const void *src);
    int size[2];
    int align[2];
    const char *name;
} StructEntry;

/* Translation table for bitmasks... */
typedef struct bitmask_transtbl {
	unsigned int	x86_mask;
	unsigned int	x86_bits;
	unsigned int	alpha_mask;
	unsigned int	alpha_bits;
} bitmask_transtbl;

void thunk_register_struct(int id, const char *name, const argtype *types);
void thunk_register_struct_direct(int id, const char *name, StructEntry *se1);
const argtype *thunk_convert(void *dst, const void *src, 
                             const argtype *type_ptr, int to_host);
#ifndef NO_THUNK_TYPE_SIZE

extern StructEntry struct_entries[];

static inline int thunk_type_size(const argtype *type_ptr, int is_host)
{
    int type, size;
    const StructEntry *se;

    type = *type_ptr;
    switch(type) {
    case TYPE_CHAR:
        return 1;
    case TYPE_SHORT:
        return 2;
    case TYPE_INT:
        return 4;
    case TYPE_LONGLONG:
    case TYPE_ULONGLONG:
        return 8;
    case TYPE_LONG:
    case TYPE_ULONG:
    case TYPE_PTRVOID:
    case TYPE_PTR:
        if (is_host) {
            return HOST_LONG_SIZE;
        } else {
            return TARGET_LONG_SIZE;
        }
        break;
    case TYPE_ARRAY:
        size = type_ptr[1];
        return size * thunk_type_size(type_ptr + 2, is_host);
    case TYPE_STRUCT:
        se = struct_entries + type_ptr[1];
        return se->size[is_host];
    default:
        return -1;
    }
}

static inline int thunk_type_align(const argtype *type_ptr, int is_host)
{
    int type;
    const StructEntry *se;

    type = *type_ptr;
    switch(type) {
    case TYPE_CHAR:
        return 1;
    case TYPE_SHORT:
        return 2;
    case TYPE_INT:
        return 4;
    case TYPE_LONGLONG:
    case TYPE_ULONGLONG:
        return 8;
    case TYPE_LONG:
    case TYPE_ULONG:
    case TYPE_PTRVOID:
    case TYPE_PTR:
        if (is_host) {
            return HOST_LONG_SIZE;
        } else {
            return TARGET_LONG_SIZE;
        }
        break;
    case TYPE_ARRAY:
        return thunk_type_align(type_ptr + 2, is_host);
    case TYPE_STRUCT:
        se = struct_entries + type_ptr[1];
        return se->align[is_host];
    default:
        return -1;
    }
}

#endif /* NO_THUNK_TYPE_SIZE */

unsigned int target_to_host_bitmask(unsigned int x86_mask, 
                                    bitmask_transtbl * trans_tbl);
unsigned int host_to_target_bitmask(unsigned int alpha_mask, 
                                    bitmask_transtbl * trans_tbl);

#endif
Commit	Line	Data
3ef693a0 FB	1	/*
	2	* Generic thunking code to convert data between host and target CPU
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
31e31b8a FB	20	#ifndef THUNK_H
	21	#define THUNK_H
	22
	23	#include <inttypes.h>
35b66fc4	24	#include "cpu.h"
34313956	25
31e31b8a FB	26	/* types enums definitions */
	27
	28	typedef enum argtype {
	29	TYPE_NULL,
	30	TYPE_CHAR,
	31	TYPE_SHORT,
	32	TYPE_INT,
	33	TYPE_LONG,
	34	TYPE_ULONG,
	35	TYPE_PTRVOID, /* pointer on unknown data */
	36	TYPE_LONGLONG,
	37	TYPE_ULONGLONG,
	38	TYPE_PTR,
	39	TYPE_ARRAY,
	40	TYPE_STRUCT,
	41	} argtype;
	42
	43	#define MK_PTR(type) TYPE_PTR, type
	44	#define MK_ARRAY(type, size) TYPE_ARRAY, size, type
	45	#define MK_STRUCT(id) TYPE_STRUCT, id
	46
	47	#define THUNK_TARGET 0
	48	#define THUNK_HOST 1
	49
	50	typedef struct {
	51	/* standard struct handling */
	52	const argtype *field_types;
	53	int nb_fields;
	54	int *field_offsets[2];
	55	/* special handling */
	56	void (convert[2])(void dst, const void *src);
	57	int size[2];
	58	int align[2];
	59	const char *name;
	60	} StructEntry;
	61
	62	/* Translation table for bitmasks... */
	63	typedef struct bitmask_transtbl {
	64	unsigned int x86_mask;
	65	unsigned int x86_bits;
	66	unsigned int alpha_mask;
	67	unsigned int alpha_bits;
	68	} bitmask_transtbl;
	69
	70	void thunk_register_struct(int id, const char name, const argtype types);
	71	void thunk_register_struct_direct(int id, const char name, StructEntry se1);
	72	const argtype thunk_convert(void dst, const void *src,
	73	const argtype *type_ptr, int to_host);
0ad041d4	74	#ifndef NO_THUNK_TYPE_SIZE
31e31b8a	75
24374901 FB	76	extern StructEntry struct_entries[];
	77
	78	static inline int thunk_type_size(const argtype *type_ptr, int is_host)
	79	{
	80	int type, size;
	81	const StructEntry *se;
	82
	83	type = *type_ptr;
	84	switch(type) {
	85	case TYPE_CHAR:
	86	return 1;
	87	case TYPE_SHORT:
	88	return 2;
	89	case TYPE_INT:
	90	return 4;
	91	case TYPE_LONGLONG:
	92	case TYPE_ULONGLONG:
	93	return 8;
	94	case TYPE_LONG:
	95	case TYPE_ULONG:
	96	case TYPE_PTRVOID:
	97	case TYPE_PTR:
	98	if (is_host) {
	99	return HOST_LONG_SIZE;
	100	} else {
	101	return TARGET_LONG_SIZE;
	102	}
	103	break;
	104	case TYPE_ARRAY:
	105	size = type_ptr[1];
	106	return size * thunk_type_size(type_ptr + 2, is_host);
	107	case TYPE_STRUCT:
	108	se = struct_entries + type_ptr[1];
	109	return se->size[is_host];
	110	default:
	111	return -1;
	112	}
	113	}
	114
	115	static inline int thunk_type_align(const argtype *type_ptr, int is_host)
	116	{
	117	int type;
	118	const StructEntry *se;
	119
	120	type = *type_ptr;
	121	switch(type) {
	122	case TYPE_CHAR:
	123	return 1;
	124	case TYPE_SHORT:
	125	return 2;
	126	case TYPE_INT:
	127	return 4;
	128	case TYPE_LONGLONG:
	129	case TYPE_ULONGLONG:
	130	return 8;
	131	case TYPE_LONG:
	132	case TYPE_ULONG:
	133	case TYPE_PTRVOID:
	134	case TYPE_PTR:
	135	if (is_host) {
	136	return HOST_LONG_SIZE;
	137	} else {
	138	return TARGET_LONG_SIZE;
	139	}
140	break;
141	case TYPE_ARRAY:
142	return thunk_type_align(type_ptr + 2, is_host);
143	case TYPE_STRUCT:
144	se = struct_entries + type_ptr[1];
145	return se->align[is_host];
146	default:
147	return -1;
148	}
149	}
150
0ad041d4 FB	151	#endif /* NO_THUNK_TYPE_SIZE */
0ad041d4 FB	152
31e31b8a FB	153	unsigned int target_to_host_bitmask(unsigned int x86_mask,
	154	bitmask_transtbl * trans_tbl);
	155	unsigned int host_to_target_bitmask(unsigned int alpha_mask,
	156	bitmask_transtbl * trans_tbl);
	157
	158	#endif