[qemu.git] / softmmu_template.h

/*
 *  Software MMU support
 * 
 *  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
 */
#define DATA_SIZE (1 << SHIFT)

#if DATA_SIZE == 8
#define SUFFIX q
#define USUFFIX q
#define DATA_TYPE uint64_t
#elif DATA_SIZE == 4
#define SUFFIX l
#define USUFFIX l
#define DATA_TYPE uint32_t
#elif DATA_SIZE == 2
#define SUFFIX w
#define USUFFIX uw
#define DATA_TYPE uint16_t
#elif DATA_SIZE == 1
#define SUFFIX b
#define USUFFIX ub
#define DATA_TYPE uint8_t
#else
#error unsupported data size
#endif

static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr, 
                                                        int is_user,
                                                        void *retaddr);
static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr, 
                                                   DATA_TYPE val, 
                                                   int is_user,
                                                   void *retaddr);

static inline DATA_TYPE glue(io_read, SUFFIX)(unsigned long physaddr, 
                                              unsigned long tlb_addr)
{
    DATA_TYPE res;
    int index;

    index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
#if SHIFT <= 2
    res = io_mem_read[index][SHIFT](physaddr);
#else
#ifdef TARGET_WORDS_BIGENDIAN
    res = (uint64_t)io_mem_read[index][2](physaddr) << 32;
    res |= io_mem_read[index][2](physaddr + 4);
#else
    res = io_mem_read[index][2](physaddr);
    res |= (uint64_t)io_mem_read[index][2](physaddr + 4) << 32;
#endif
#endif /* SHIFT > 2 */
    return res;
}

static inline void glue(io_write, SUFFIX)(unsigned long physaddr, 
                                          DATA_TYPE val,
                                          unsigned long tlb_addr)
{
    int index;

    index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
#if SHIFT <= 2
    io_mem_write[index][SHIFT](physaddr, val);
#else
#ifdef TARGET_WORDS_BIGENDIAN
    io_mem_write[index][2](physaddr, val >> 32);
    io_mem_write[index][2](physaddr + 4, val);
#else
    io_mem_write[index][2](physaddr, val);
    io_mem_write[index][2](physaddr + 4, val >> 32);
#endif
#endif /* SHIFT > 2 */
}

/* handle all cases except unaligned access which span two pages */
DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
                                                         int is_user)
{
    DATA_TYPE res;
    int index;
    unsigned long physaddr, tlb_addr;
    void *retaddr;
    
    /* test if there is match for unaligned or IO access */
    /* XXX: could done more in memory macro in a non portable way */
    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 redo:
    tlb_addr = env->tlb_read[is_user][index].address;
    if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
        physaddr = addr + env->tlb_read[is_user][index].addend;
        if (tlb_addr & ~TARGET_PAGE_MASK) {
            /* IO access */
            if ((addr & (DATA_SIZE - 1)) != 0)
                goto do_unaligned_access;
            res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
        } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
            /* slow unaligned access (it spans two pages or IO) */
        do_unaligned_access:
            retaddr = GETPC();
            res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr, 
                                                         is_user, retaddr);
        } else {
            /* unaligned access in the same page */
            res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
        }
    } else {
        /* the page is not in the TLB : fill it */
        retaddr = GETPC();
        tlb_fill(addr, 0, is_user, retaddr);
        goto redo;
    }
    return res;
}

/* handle all unaligned cases */
static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr, 
                                                        int is_user,
                                                        void *retaddr)
{
    DATA_TYPE res, res1, res2;
    int index, shift;
    unsigned long physaddr, tlb_addr, addr1, addr2;

    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 redo:
    tlb_addr = env->tlb_read[is_user][index].address;
    if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
        physaddr = addr + env->tlb_read[is_user][index].addend;
        if (tlb_addr & ~TARGET_PAGE_MASK) {
            /* IO access */
            if ((addr & (DATA_SIZE - 1)) != 0)
                goto do_unaligned_access;
            res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
        } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
        do_unaligned_access:
            /* slow unaligned access (it spans two pages) */
            addr1 = addr & ~(DATA_SIZE - 1);
            addr2 = addr1 + DATA_SIZE;
            res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1, 
                                                          is_user, retaddr);
            res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2, 
                                                          is_user, retaddr);
            shift = (addr & (DATA_SIZE - 1)) * 8;
#ifdef TARGET_WORDS_BIGENDIAN
            res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
#else
            res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
#endif
        } else {
            /* unaligned/aligned access in the same page */
            res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
        }
    } else {
        /* the page is not in the TLB : fill it */
        tlb_fill(addr, 0, is_user, retaddr);
        goto redo;
    }
    return res;
}


void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr, 
                                                    DATA_TYPE val,
                                                    int is_user)
{
    unsigned long physaddr, tlb_addr;
    void *retaddr;
    int index;
    
    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 redo:
    tlb_addr = env->tlb_write[is_user][index].address;
    if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
        physaddr = addr + env->tlb_write[is_user][index].addend;
        if (tlb_addr & ~TARGET_PAGE_MASK) {
            /* IO access */
            if ((addr & (DATA_SIZE - 1)) != 0)
                goto do_unaligned_access;
            glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
        } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
        do_unaligned_access:
            retaddr = GETPC();
            glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val, 
                                                   is_user, retaddr);
        } else {
            /* aligned/unaligned access in the same page */
            glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
        }
    } else {
        /* the page is not in the TLB : fill it */
        retaddr = GETPC();
        tlb_fill(addr, 1, is_user, retaddr);
        goto redo;
    }
}

/* handles all unaligned cases */
static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr, 
                                                   DATA_TYPE val,
                                                   int is_user,
                                                   void *retaddr)
{
    unsigned long physaddr, tlb_addr;
    int index, i;

    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 redo:
    tlb_addr = env->tlb_write[is_user][index].address;
    if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
        physaddr = addr + env->tlb_write[is_user][index].addend;
        if (tlb_addr & ~TARGET_PAGE_MASK) {
            /* IO access */
            if ((addr & (DATA_SIZE - 1)) != 0)
                goto do_unaligned_access;
            glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
        } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
        do_unaligned_access:
            /* XXX: not efficient, but simple */
            for(i = 0;i < DATA_SIZE; i++) {
#ifdef TARGET_WORDS_BIGENDIAN
                glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)), 
                                          is_user, retaddr);
#else
                glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8), 
                                          is_user, retaddr);
#endif
            }
        } else {
            /* aligned/unaligned access in the same page */
            glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
        }
    } else {
        /* the page is not in the TLB : fill it */
        tlb_fill(addr, 1, is_user, retaddr);
        goto redo;
    }
}

#undef SHIFT
#undef DATA_TYPE
#undef SUFFIX
#undef USUFFIX
#undef DATA_SIZE
Commit	Line	Data
b92e5a22 FB	1	/*
	2	* Software MMU support
	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	*/
	20	#define DATA_SIZE (1 << SHIFT)
	21
	22	#if DATA_SIZE == 8
	23	#define SUFFIX q
61382a50	24	#define USUFFIX q
b92e5a22 FB	25	#define DATA_TYPE uint64_t
	26	#elif DATA_SIZE == 4
	27	#define SUFFIX l
61382a50	28	#define USUFFIX l
b92e5a22 FB	29	#define DATA_TYPE uint32_t
	30	#elif DATA_SIZE == 2
	31	#define SUFFIX w
61382a50	32	#define USUFFIX uw
b92e5a22 FB	33	#define DATA_TYPE uint16_t
	34	#elif DATA_SIZE == 1
	35	#define SUFFIX b
61382a50	36	#define USUFFIX ub
b92e5a22 FB	37	#define DATA_TYPE uint8_t
	38	#else
	39	#error unsupported data size
	40	#endif
	41
61382a50 FB	42	static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
	43	int is_user,
	44	void *retaddr);
	45	static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr,
	46	DATA_TYPE val,
	47	int is_user,
	48	void *retaddr);
b92e5a22 FB	49
	50	static inline DATA_TYPE glue(io_read, SUFFIX)(unsigned long physaddr,
	51	unsigned long tlb_addr)
	52	{
	53	DATA_TYPE res;
	54	int index;
	55
	56	index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
	57	#if SHIFT <= 2
	58	res = io_mem_read[index][SHIFT](physaddr);
	59	#else
	60	#ifdef TARGET_WORDS_BIGENDIAN
	61	res = (uint64_t)io_mem_read[index][2](physaddr) << 32;
	62	res \|= io_mem_read[index][2](physaddr + 4);
	63	#else
	64	res = io_mem_read[index][2](physaddr);
	65	res \|= (uint64_t)io_mem_read[index][2](physaddr + 4) << 32;
	66	#endif
	67	#endif /* SHIFT > 2 */
	68	return res;
	69	}
	70
	71	static inline void glue(io_write, SUFFIX)(unsigned long physaddr,
	72	DATA_TYPE val,
	73	unsigned long tlb_addr)
	74	{
	75	int index;
	76
	77	index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
	78	#if SHIFT <= 2
	79	io_mem_write[index][SHIFT](physaddr, val);
	80	#else
	81	#ifdef TARGET_WORDS_BIGENDIAN
	82	io_mem_write[index][2](physaddr, val >> 32);
	83	io_mem_write[index][2](physaddr + 4, val);
	84	#else
	85	io_mem_write[index][2](physaddr, val);
	86	io_mem_write[index][2](physaddr + 4, val >> 32);
	87	#endif
	88	#endif /* SHIFT > 2 */
	89	}
	90
	91	/* handle all cases except unaligned access which span two pages */
61382a50 FB	92	DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
61382a50 FB	93	int is_user)
b92e5a22 FB	94	{
b92e5a22 FB	95	DATA_TYPE res;
61382a50	96	int index;
b92e5a22 FB	97	unsigned long physaddr, tlb_addr;
	98	void *retaddr;
	99
	100	/* test if there is match for unaligned or IO access */
	101	/* XXX: could done more in memory macro in a non portable way */
b92e5a22 FB	102	index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
	103	redo:
	104	tlb_addr = env->tlb_read[is_user][index].address;
	105	if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK \| TLB_INVALID_MASK))) {
	106	physaddr = addr + env->tlb_read[is_user][index].addend;
	107	if (tlb_addr & ~TARGET_PAGE_MASK) {
	108	/* IO access */
	109	if ((addr & (DATA_SIZE - 1)) != 0)
	110	goto do_unaligned_access;
	111	res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
	112	} else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
	113	/* slow unaligned access (it spans two pages or IO) */
	114	do_unaligned_access:
61382a50 FB	115	retaddr = GETPC();
	116	res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
	117	is_user, retaddr);
b92e5a22 FB	118	} else {
b92e5a22 FB	119	/* unaligned access in the same page */
61382a50	120	res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
b92e5a22 FB	121	}
	122	} else {
	123	/* the page is not in the TLB : fill it */
61382a50 FB	124	retaddr = GETPC();
61382a50 FB	125	tlb_fill(addr, 0, is_user, retaddr);
b92e5a22 FB	126	goto redo;
	127	}
	128	return res;
	129	}
	130
	131	/* handle all unaligned cases */
61382a50 FB	132	static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
	133	int is_user,
	134	void *retaddr)
b92e5a22 FB	135	{
b92e5a22 FB	136	DATA_TYPE res, res1, res2;
61382a50	137	int index, shift;
b92e5a22 FB	138	unsigned long physaddr, tlb_addr, addr1, addr2;
b92e5a22 FB	139
b92e5a22 FB	140	index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
	141	redo:
	142	tlb_addr = env->tlb_read[is_user][index].address;
	143	if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK \| TLB_INVALID_MASK))) {
	144	physaddr = addr + env->tlb_read[is_user][index].addend;
	145	if (tlb_addr & ~TARGET_PAGE_MASK) {
	146	/* IO access */
	147	if ((addr & (DATA_SIZE - 1)) != 0)
	148	goto do_unaligned_access;
	149	res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
	150	} else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
	151	do_unaligned_access:
	152	/* slow unaligned access (it spans two pages) */
	153	addr1 = addr & ~(DATA_SIZE - 1);
	154	addr2 = addr1 + DATA_SIZE;
61382a50 FB	155	res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
	156	is_user, retaddr);
	157	res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
	158	is_user, retaddr);
b92e5a22 FB	159	shift = (addr & (DATA_SIZE - 1)) * 8;
	160	#ifdef TARGET_WORDS_BIGENDIAN
	161	res = (res1 << shift) \| (res2 >> ((DATA_SIZE * 8) - shift));
	162	#else
	163	res = (res1 >> shift) \| (res2 << ((DATA_SIZE * 8) - shift));
	164	#endif
	165	} else {
	166	/* unaligned/aligned access in the same page */
61382a50	167	res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
b92e5a22 FB	168	}
	169	} else {
	170	/* the page is not in the TLB : fill it */
61382a50	171	tlb_fill(addr, 0, is_user, retaddr);
b92e5a22 FB	172	goto redo;
	173	}
	174	return res;
	175	}
	176
	177
61382a50 FB	178	void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr,
	179	DATA_TYPE val,
	180	int is_user)
b92e5a22 FB	181	{
	182	unsigned long physaddr, tlb_addr;
	183	void *retaddr;
61382a50	184	int index;
b92e5a22	185
b92e5a22 FB	186	index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
	187	redo:
	188	tlb_addr = env->tlb_write[is_user][index].address;
	189	if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK \| TLB_INVALID_MASK))) {
4ad06a29	190	physaddr = addr + env->tlb_write[is_user][index].addend;
b92e5a22 FB	191	if (tlb_addr & ~TARGET_PAGE_MASK) {
	192	/* IO access */
	193	if ((addr & (DATA_SIZE - 1)) != 0)
	194	goto do_unaligned_access;
	195	glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
	196	} else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
	197	do_unaligned_access:
61382a50 FB	198	retaddr = GETPC();
	199	glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
	200	is_user, retaddr);
b92e5a22 FB	201	} else {
	202	/* aligned/unaligned access in the same page */
	203	glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
	204	}
	205	} else {
	206	/* the page is not in the TLB : fill it */
61382a50 FB	207	retaddr = GETPC();
61382a50 FB	208	tlb_fill(addr, 1, is_user, retaddr);
b92e5a22 FB	209	goto redo;
	210	}
	211	}
	212
	213	/* handles all unaligned cases */
61382a50 FB	214	static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr,
	215	DATA_TYPE val,
	216	int is_user,
	217	void *retaddr)
b92e5a22 FB	218	{
b92e5a22 FB	219	unsigned long physaddr, tlb_addr;
61382a50	220	int index, i;
b92e5a22	221
b92e5a22 FB	222	index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
	223	redo:
	224	tlb_addr = env->tlb_write[is_user][index].address;
	225	if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK \| TLB_INVALID_MASK))) {
4ad06a29	226	physaddr = addr + env->tlb_write[is_user][index].addend;
b92e5a22 FB	227	if (tlb_addr & ~TARGET_PAGE_MASK) {
	228	/* IO access */
	229	if ((addr & (DATA_SIZE - 1)) != 0)
	230	goto do_unaligned_access;
	231	glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
	232	} else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
	233	do_unaligned_access:
	234	/* XXX: not efficient, but simple */
	235	for(i = 0;i < DATA_SIZE; i++) {
	236	#ifdef TARGET_WORDS_BIGENDIAN
61382a50 FB	237	glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
61382a50 FB	238	is_user, retaddr);
b92e5a22	239	#else
61382a50 FB	240	glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
61382a50 FB	241	is_user, retaddr);
b92e5a22 FB	242	#endif
	243	}
	244	} else {
	245	/* aligned/unaligned access in the same page */
	246	glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
	247	}
	248	} else {
	249	/* the page is not in the TLB : fill it */
61382a50	250	tlb_fill(addr, 1, is_user, retaddr);
b92e5a22 FB	251	goto redo;
	252	}
	253	}
	254
	255	#undef SHIFT
	256	#undef DATA_TYPE
	257	#undef SUFFIX
61382a50	258	#undef USUFFIX
b92e5a22	259	#undef DATA_SIZE