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/*  armvirt.c -- ARMulator virtual memory interace:  ARM6 Instruction Emulator.
    Copyright (C) 1994 Advanced RISC Machines Ltd.
 
    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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
 
/* This file contains a complete ARMulator memory model, modelling a
"virtual memory" system. A much simpler model can be found in armfast.c,
and that model goes faster too, but has a fixed amount of memory. This
model's memory has 64K pages, allocated on demand from a 64K entry page
table. The routines PutWord and GetWord implement this. Pages are never
freed as they might be needed again. A single area of memory may be
defined to generate aborts. */
 
#include "armopts.h"
#include "armos.h"
#include "armdefs.h"
#include "ansidecl.h"
 
#ifdef VALIDATE                 /* for running the validate suite */
#define TUBE 48 * 1024 * 1024   /* write a char on the screen */
#define ABORTS 1
#endif
 
/* #define ABORTS */
 
#ifdef ABORTS                   /* the memory system will abort */
/* For the old test suite Abort between 32 Kbytes and 32 Mbytes
   For the new test suite Abort between 8 Mbytes and 26 Mbytes */
/* #define LOWABORT 32 * 1024
#define HIGHABORT 32 * 1024 * 1024 */
#define LOWABORT 8 * 1024 * 1024
#define HIGHABORT 26 * 1024 * 1024
 
#endif
 
#define NUMPAGES 64 * 1024
#define PAGESIZE 64 * 1024
#define PAGEBITS 16
#define OFFSETBITS 0xffff
 
int SWI_vector_installed = FALSE;
 
/***************************************************************************\
*        Get a Word from Virtual Memory, maybe allocating the page          *
\***************************************************************************/
 
static ARMword
GetWord (ARMul_State * state, ARMword address, int check)
{
  ARMword page;
  ARMword offset;
  ARMword **pagetable;
  ARMword *pageptr;
 
  if (check && state->is_XScale)
    XScale_check_memacc (state, &address, 0);
 
  page = address >> PAGEBITS;
  offset = (address & OFFSETBITS) >> 2;
  pagetable = (ARMword **) state->MemDataPtr;
  pageptr = *(pagetable + page);
 
  if (pageptr == NULL)
    {
      pageptr = (ARMword *) malloc (PAGESIZE);
 
      if (pageptr == NULL)
        {
          perror ("ARMulator can't allocate VM page");
          exit (12);
        }
 
      *(pagetable + page) = pageptr;
    }
 
  return *(pageptr + offset);
}
 
/***************************************************************************\
*        Put a Word into Virtual Memory, maybe allocating the page          *
\***************************************************************************/
 
static void
PutWord (ARMul_State * state, ARMword address, ARMword data, int check)
{
  ARMword page;
  ARMword offset;
  ARMword **pagetable;
  ARMword *pageptr;
 
  if (check && state->is_XScale)
    XScale_check_memacc (state, &address, 1);
 
  page = address >> PAGEBITS;
  offset = (address & OFFSETBITS) >> 2;
  pagetable = (ARMword **) state->MemDataPtr;
  pageptr = *(pagetable + page);
 
  if (pageptr == NULL)
    {
      pageptr = (ARMword *) malloc (PAGESIZE);
      if (pageptr == NULL)
        {
          perror ("ARMulator can't allocate VM page");
          exit (13);
        }
 
      *(pagetable + page) = pageptr;
    }
 
  if (address == 0x8)
    SWI_vector_installed = TRUE;
 
  *(pageptr + offset) = data;
}
 
/***************************************************************************\
*                      Initialise the memory interface                      *
\***************************************************************************/
 
unsigned
ARMul_MemoryInit (ARMul_State * state, unsigned long initmemsize)
{
  ARMword **pagetable;
  unsigned page;
 
  if (initmemsize)
    state->MemSize = initmemsize;
 
  pagetable = (ARMword **) malloc (sizeof (ARMword *) * NUMPAGES);
 
  if (pagetable == NULL)
    return FALSE;
 
  for (page = 0; page < NUMPAGES; page++)
    *(pagetable + page) = NULL;
 
  state->MemDataPtr = (unsigned char *) pagetable;
 
  ARMul_ConsolePrint (state, ", 4 Gb memory");
 
  return TRUE;
}
 
/***************************************************************************\
*                         Remove the memory interface                       *
\***************************************************************************/
 
void
ARMul_MemoryExit (ARMul_State * state)
{
  ARMword page;
  ARMword **pagetable;
  ARMword *pageptr;
 
  pagetable = (ARMword **) state->MemDataPtr;
  for (page = 0; page < NUMPAGES; page++)
    {
      pageptr = *(pagetable + page);
      if (pageptr != NULL)
        free ((char *) pageptr);
    }
  free ((char *) pagetable);
  return;
}
 
/***************************************************************************\
*                   ReLoad Instruction                                     *
\***************************************************************************/
 
ARMword
ARMul_ReLoadInstr (ARMul_State * state, ARMword address, ARMword isize)
{
#ifdef ABORTS
  if (address >= LOWABORT && address < HIGHABORT)
    {
      ARMul_PREFETCHABORT (address);
      return ARMul_ABORTWORD;
    }
  else
    {
      ARMul_CLEARABORT;
    }
#endif
 
  if ((isize == 2) && (address & 0x2))
    {
      /* We return the next two halfwords: */
      ARMword lo = GetWord (state, address, FALSE);
      ARMword hi = GetWord (state, address + 4, FALSE);
 
      if (state->bigendSig == HIGH)
        return (lo << 16) | (hi >> 16);
      else
        return ((hi & 0xFFFF) << 16) | (lo >> 16);
    }
 
  return GetWord (state, address, TRUE);
}
 
/***************************************************************************\
*                   Load Instruction, Sequential Cycle                      *
\***************************************************************************/
 
ARMword ARMul_LoadInstrS (ARMul_State * state, ARMword address, ARMword isize)
{
  state->NumScycles++;
 
#ifdef HOURGLASS
  if ((state->NumScycles & HOURGLASS_RATE) == 0)
    {
      HOURGLASS;
    }
#endif
 
  return ARMul_ReLoadInstr (state, address, isize);
}
 
/***************************************************************************\
*                 Load Instruction, Non Sequential Cycle                    *
\***************************************************************************/
 
ARMword ARMul_LoadInstrN (ARMul_State * state, ARMword address, ARMword isize)
{
  state->NumNcycles++;
 
  return ARMul_ReLoadInstr (state, address, isize);
}
 
/***************************************************************************\
*                      Read Word (but don't tell anyone!)                   *
\***************************************************************************/
 
ARMword ARMul_ReadWord (ARMul_State * state, ARMword address)
{
#ifdef ABORTS
  if (address >= LOWABORT && address < HIGHABORT)
    {
      ARMul_DATAABORT (address);
      return ARMul_ABORTWORD;
    }
  else
    {
      ARMul_CLEARABORT;
    }
#endif
 
  return GetWord (state, address, TRUE);
}
 
/***************************************************************************\
*                        Load Word, Sequential Cycle                        *
\***************************************************************************/
 
ARMword ARMul_LoadWordS (ARMul_State * state, ARMword address)
{
  state->NumScycles++;
 
  return ARMul_ReadWord (state, address);
}
 
/***************************************************************************\
*                      Load Word, Non Sequential Cycle                      *
\***************************************************************************/
 
ARMword ARMul_LoadWordN (ARMul_State * state, ARMword address)
{
  state->NumNcycles++;
 
  return ARMul_ReadWord (state, address);
}
 
/***************************************************************************\
*                     Load Halfword, (Non Sequential Cycle)                 *
\***************************************************************************/
 
ARMword ARMul_LoadHalfWord (ARMul_State * state, ARMword address)
{
  ARMword temp, offset;
 
  state->NumNcycles++;
 
  temp = ARMul_ReadWord (state, address);
  offset = (((ARMword) state->bigendSig * 2) ^ (address & 2)) << 3;     /* bit offset into the word */
 
  return (temp >> offset) & 0xffff;
}
 
/***************************************************************************\
*                      Read Byte (but don't tell anyone!)                   *
\***************************************************************************/
 
ARMword ARMul_ReadByte (ARMul_State * state, ARMword address)
{
  ARMword temp, offset;
 
  temp = ARMul_ReadWord (state, address);
  offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3;     /* bit offset into the word */
 
  return (temp >> offset & 0xffL);
}
 
/***************************************************************************\
*                     Load Byte, (Non Sequential Cycle)                     *
\***************************************************************************/
 
ARMword ARMul_LoadByte (ARMul_State * state, ARMword address)
{
  state->NumNcycles++;
 
  return ARMul_ReadByte (state, address);
}
 
/***************************************************************************\
*                     Write Word (but don't tell anyone!)                   *
\***************************************************************************/
 
void
ARMul_WriteWord (ARMul_State * state, ARMword address, ARMword data)
{
#ifdef ABORTS
  if (address >= LOWABORT && address < HIGHABORT)
    {
      ARMul_DATAABORT (address);
      return;
    }
  else
    {
      ARMul_CLEARABORT;
    }
#endif
 
  PutWord (state, address, data, TRUE);
}
 
/***************************************************************************\
*                       Store Word, Sequential Cycle                        *
\***************************************************************************/
 
void
ARMul_StoreWordS (ARMul_State * state, ARMword address, ARMword data)
{
  state->NumScycles++;
 
  ARMul_WriteWord (state, address, data);
}
 
/***************************************************************************\
*                       Store Word, Non Sequential Cycle                        *
\***************************************************************************/
 
void
ARMul_StoreWordN (ARMul_State * state, ARMword address, ARMword data)
{
  state->NumNcycles++;
 
  ARMul_WriteWord (state, address, data);
}
 
/***************************************************************************\
*                    Store HalfWord, (Non Sequential Cycle)                 *
\***************************************************************************/
 
void
ARMul_StoreHalfWord (ARMul_State * state, ARMword address, ARMword data)
{
  ARMword temp, offset;
 
  state->NumNcycles++;
 
#ifdef VALIDATE
  if (address == TUBE)
    {
      if (data == 4)
        state->Emulate = FALSE;
      else
        (void) putc ((char) data, stderr);      /* Write Char */
      return;
    }
#endif
 
  temp = ARMul_ReadWord (state, address);
  offset = (((ARMword) state->bigendSig * 2) ^ (address & 2)) << 3;     /* bit offset into the word */
 
  PutWord (state, address,
           (temp & ~(0xffffL << offset)) | ((data & 0xffffL) << offset),
           TRUE);
}
 
/***************************************************************************\
*                     Write Byte (but don't tell anyone!)                   *
\***************************************************************************/
 
void
ARMul_WriteByte (ARMul_State * state, ARMword address, ARMword data)
{
  ARMword temp, offset;
 
  temp = ARMul_ReadWord (state, address);
  offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3;     /* bit offset into the word */
 
  PutWord (state, address,
           (temp & ~(0xffL << offset)) | ((data & 0xffL) << offset),
           TRUE);
}
 
/***************************************************************************\
*                    Store Byte, (Non Sequential Cycle)                     *
\***************************************************************************/
 
void
ARMul_StoreByte (ARMul_State * state, ARMword address, ARMword data)
{
  state->NumNcycles++;
 
#ifdef VALIDATE
  if (address == TUBE)
    {
      if (data == 4)
        state->Emulate = FALSE;
      else
        (void) putc ((char) data, stderr);      /* Write Char */
      return;
    }
#endif
 
  ARMul_WriteByte (state, address, data);
}
 
/***************************************************************************\
*                   Swap Word, (Two Non Sequential Cycles)                  *
\***************************************************************************/
 
ARMword ARMul_SwapWord (ARMul_State * state, ARMword address, ARMword data)
{
  ARMword temp;
 
  state->NumNcycles++;
 
  temp = ARMul_ReadWord (state, address);
 
  state->NumNcycles++;
 
  PutWord (state, address, data, TRUE);
 
  return temp;
}
 
/***************************************************************************\
*                   Swap Byte, (Two Non Sequential Cycles)                  *
\***************************************************************************/
 
ARMword ARMul_SwapByte (ARMul_State * state, ARMword address, ARMword data)
{
  ARMword temp;
 
  temp = ARMul_LoadByte (state, address);
  ARMul_StoreByte (state, address, data);
 
  return temp;
}
 
/***************************************************************************\
*                             Count I Cycles                                *
\***************************************************************************/
 
void
ARMul_Icycles (ARMul_State * state, unsigned number, ARMword address ATTRIBUTE_UNUSED)
{
  state->NumIcycles += number;
  ARMul_CLEARABORT;
}
 
/***************************************************************************\
*                             Count C Cycles                                *
\***************************************************************************/
 
void
ARMul_Ccycles (ARMul_State * state, unsigned number, ARMword address ATTRIBUTE_UNUSED)
{
  state->NumCcycles += number;
  ARMul_CLEARABORT;
}
 
 
/* Read a byte.  Do not check for alignment or access errors.  */
 
ARMword
ARMul_SafeReadByte (ARMul_State * state, ARMword address)
{
  ARMword temp, offset;
 
  temp = GetWord (state, address, FALSE);
  offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3;
 
  return (temp >> offset & 0xffL);
}
 
void
ARMul_SafeWriteByte (ARMul_State * state, ARMword address, ARMword data)
{
  ARMword temp, offset;
 
  temp = GetWord (state, address, FALSE);
  offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3;
 
  PutWord (state, address,
           (temp & ~(0xffL << offset)) | ((data & 0xffL) << offset),
           FALSE);
}

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[/] [scarts/] [trunk/] [toolchain/] [scarts-gdb/] [gdb-6.8/] [sim/] [arm/] [armvirt.c] - Blame information for rev 26

Line No.	Rev	Author	Line
1	26	jlechner	`/* armvirt.c -- ARMulator virtual memory interace: ARM6 Instruction Emulator.`
2			`Copyright (C) 1994 Advanced RISC Machines Ltd.`
3
4			`This program is free software; you can redistribute it and/or modify`
5			`it under the terms of the GNU General Public License as published by`
6			`the Free Software Foundation; either version 2 of the License, or`
7			`(at your option) any later version.`
8
9			`This program is distributed in the hope that it will be useful,`
10			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
11			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
12			`GNU General Public License for more details.`
13
14			`You should have received a copy of the GNU General Public License`
15			`along with this program; if not, write to the Free Software`
16			`Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */`
17
18			`/* This file contains a complete ARMulator memory model, modelling a`
19			`"virtual memory" system. A much simpler model can be found in armfast.c,`
20			`and that model goes faster too, but has a fixed amount of memory. This`
21			`model's memory has 64K pages, allocated on demand from a 64K entry page`
22			`table. The routines PutWord and GetWord implement this. Pages are never`
23			`freed as they might be needed again. A single area of memory may be`
24			`defined to generate aborts. */`
25
26			`#include "armopts.h"`
27			`#include "armos.h"`
28			`#include "armdefs.h"`
29			`#include "ansidecl.h"`
30
31			`#ifdef VALIDATE /* for running the validate suite */`
32			`#define TUBE 48 * 1024 * 1024 /* write a char on the screen */`
33			`#define ABORTS 1`
34			`#endif`
35
36			`/* #define ABORTS */`
37
38			`#ifdef ABORTS /* the memory system will abort */`
39			`/* For the old test suite Abort between 32 Kbytes and 32 Mbytes`
40			`For the new test suite Abort between 8 Mbytes and 26 Mbytes */`
41			`/* #define LOWABORT 32 * 1024`
42			`#define HIGHABORT 32 * 1024 * 1024 */`
43			`#define LOWABORT 8 * 1024 * 1024`
44			`#define HIGHABORT 26 * 1024 * 1024`
45
46			`#endif`
47
48			`#define NUMPAGES 64 * 1024`
49			`#define PAGESIZE 64 * 1024`
50			`#define PAGEBITS 16`
51			`#define OFFSETBITS 0xffff`
52
53			`int SWI_vector_installed = FALSE;`
54
55			`/***************************************************************************\`
56			`* Get a Word from Virtual Memory, maybe allocating the page *`
57			`\***************************************************************************/`
58
59			`static ARMword`
60			`GetWord (ARMul_State * state, ARMword address, int check)`
61			`{`
62			`ARMword page;`
63			`ARMword offset;`
64			`ARMword **pagetable;`
65			`ARMword *pageptr;`
66
67			`if (check && state->is_XScale)`
68			`XScale_check_memacc (state, &address, 0);`
69
70			`page = address >> PAGEBITS;`
71			`offset = (address & OFFSETBITS) >> 2;`
72			`pagetable = (ARMword **) state->MemDataPtr;`
73			`pageptr = *(pagetable + page);`
74
75			`if (pageptr == NULL)`
76			`{`
77			`pageptr = (ARMword *) malloc (PAGESIZE);`
78
79			`if (pageptr == NULL)`
80			`{`
81			`perror ("ARMulator can't allocate VM page");`
82			`exit (12);`
83			`}`
84
85			`*(pagetable + page) = pageptr;`
86			`}`
87
88			`return *(pageptr + offset);`
89			`}`
90
91			`/***************************************************************************\`
92			`* Put a Word into Virtual Memory, maybe allocating the page *`
93			`\***************************************************************************/`
94
95			`static void`
96			`PutWord (ARMul_State * state, ARMword address, ARMword data, int check)`
97			`{`
98			`ARMword page;`
99			`ARMword offset;`
100			`ARMword **pagetable;`
101			`ARMword *pageptr;`
102
103			`if (check && state->is_XScale)`
104			`XScale_check_memacc (state, &address, 1);`
105
106			`page = address >> PAGEBITS;`
107			`offset = (address & OFFSETBITS) >> 2;`
108			`pagetable = (ARMword **) state->MemDataPtr;`
109			`pageptr = *(pagetable + page);`
110
111			`if (pageptr == NULL)`
112			`{`
113			`pageptr = (ARMword *) malloc (PAGESIZE);`
114			`if (pageptr == NULL)`
115			`{`
116			`perror ("ARMulator can't allocate VM page");`
117			`exit (13);`
118			`}`
119
120			`*(pagetable + page) = pageptr;`
121			`}`
122
123			`if (address == 0x8)`
124			`SWI_vector_installed = TRUE;`
125
126			`*(pageptr + offset) = data;`
127			`}`
128
129			`/***************************************************************************\`
130			`* Initialise the memory interface *`
131			`\***************************************************************************/`
132
133			`unsigned`
134			`ARMul_MemoryInit (ARMul_State * state, unsigned long initmemsize)`
135			`{`
136			`ARMword **pagetable;`
137			`unsigned page;`
138
139			`if (initmemsize)`
140			`state->MemSize = initmemsize;`
141
142			`pagetable = (ARMword *) malloc (sizeof (ARMword ) * NUMPAGES);`
143
144			`if (pagetable == NULL)`
145			`return FALSE;`
146
147			`for (page = 0; page < NUMPAGES; page++)`
148			`*(pagetable + page) = NULL;`
149
150			`state->MemDataPtr = (unsigned char *) pagetable;`
151
152			`ARMul_ConsolePrint (state, ", 4 Gb memory");`
153
154			`return TRUE;`
155			`}`
156
157			`/***************************************************************************\`
158			`* Remove the memory interface *`
159			`\***************************************************************************/`
160
161			`void`
162			`ARMul_MemoryExit (ARMul_State * state)`
163			`{`
164			`ARMword page;`
165			`ARMword **pagetable;`
166			`ARMword *pageptr;`
167
168			`pagetable = (ARMword **) state->MemDataPtr;`
169			`for (page = 0; page < NUMPAGES; page++)`
170			`{`
171			`pageptr = *(pagetable + page);`
172			`if (pageptr != NULL)`
173			`free ((char *) pageptr);`
174			`}`
175			`free ((char *) pagetable);`
176			`return;`
177			`}`
178
179			`/***************************************************************************\`
180			`* ReLoad Instruction *`
181			`\***************************************************************************/`
182
183			`ARMword`
184			`ARMul_ReLoadInstr (ARMul_State * state, ARMword address, ARMword isize)`
185			`{`
186			`#ifdef ABORTS`
187			`if (address >= LOWABORT && address < HIGHABORT)`
188			`{`
189			`ARMul_PREFETCHABORT (address);`
190			`return ARMul_ABORTWORD;`
191			`}`
192			`else`
193			`{`
194			`ARMul_CLEARABORT;`
195			`}`
196			`#endif`
197
198			`if ((isize == 2) && (address & 0x2))`
199			`{`
200			`/* We return the next two halfwords: */`
201			`ARMword lo = GetWord (state, address, FALSE);`
202			`ARMword hi = GetWord (state, address + 4, FALSE);`
203
204			`if (state->bigendSig == HIGH)`
205			`return (lo << 16) \| (hi >> 16);`
206			`else`
207			`return ((hi & 0xFFFF) << 16) \| (lo >> 16);`
208			`}`
209
210			`return GetWord (state, address, TRUE);`
211			`}`
212
213			`/***************************************************************************\`
214			`* Load Instruction, Sequential Cycle *`
215			`\***************************************************************************/`
216
217			`ARMword ARMul_LoadInstrS (ARMul_State * state, ARMword address, ARMword isize)`
218			`{`
219			`state->NumScycles++;`
220
221			`#ifdef HOURGLASS`
222			`if ((state->NumScycles & HOURGLASS_RATE) == 0)`
223			`{`
224			`HOURGLASS;`
225			`}`
226			`#endif`
227
228			`return ARMul_ReLoadInstr (state, address, isize);`
229			`}`
230
231			`/***************************************************************************\`
232			`* Load Instruction, Non Sequential Cycle *`
233			`\***************************************************************************/`
234
235			`ARMword ARMul_LoadInstrN (ARMul_State * state, ARMword address, ARMword isize)`
236			`{`
237			`state->NumNcycles++;`
238
239			`return ARMul_ReLoadInstr (state, address, isize);`
240			`}`
241
242			`/***************************************************************************\`
243			`* Read Word (but don't tell anyone!) *`
244			`\***************************************************************************/`
245
246			`ARMword ARMul_ReadWord (ARMul_State * state, ARMword address)`
247			`{`
248			`#ifdef ABORTS`
249			`if (address >= LOWABORT && address < HIGHABORT)`
250			`{`
251			`ARMul_DATAABORT (address);`
252			`return ARMul_ABORTWORD;`
253			`}`
254			`else`
255			`{`
256			`ARMul_CLEARABORT;`
257			`}`
258			`#endif`
259
260			`return GetWord (state, address, TRUE);`
261			`}`
262
263			`/***************************************************************************\`
264			`* Load Word, Sequential Cycle *`
265			`\***************************************************************************/`
266
267			`ARMword ARMul_LoadWordS (ARMul_State * state, ARMword address)`
268			`{`
269			`state->NumScycles++;`
270
271			`return ARMul_ReadWord (state, address);`
272			`}`
273
274			`/***************************************************************************\`
275			`* Load Word, Non Sequential Cycle *`
276			`\***************************************************************************/`
277
278			`ARMword ARMul_LoadWordN (ARMul_State * state, ARMword address)`
279			`{`
280			`state->NumNcycles++;`
281
282			`return ARMul_ReadWord (state, address);`
283			`}`
284
285			`/***************************************************************************\`
286			`* Load Halfword, (Non Sequential Cycle) *`
287			`\***************************************************************************/`
288
289			`ARMword ARMul_LoadHalfWord (ARMul_State * state, ARMword address)`
290			`{`
291			`ARMword temp, offset;`
292
293			`state->NumNcycles++;`
294
295			`temp = ARMul_ReadWord (state, address);`
296			`offset = (((ARMword) state->bigendSig * 2) ^ (address & 2)) << 3; /* bit offset into the word */`
297
298			`return (temp >> offset) & 0xffff;`
299			`}`
300
301			`/***************************************************************************\`
302			`* Read Byte (but don't tell anyone!) *`
303			`\***************************************************************************/`
304
305			`ARMword ARMul_ReadByte (ARMul_State * state, ARMword address)`
306			`{`
307			`ARMword temp, offset;`
308
309			`temp = ARMul_ReadWord (state, address);`
310			`offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3; /* bit offset into the word */`
311
312			`return (temp >> offset & 0xffL);`
313			`}`
314
315			`/***************************************************************************\`
316			`* Load Byte, (Non Sequential Cycle) *`
317			`\***************************************************************************/`
318
319			`ARMword ARMul_LoadByte (ARMul_State * state, ARMword address)`
320			`{`
321			`state->NumNcycles++;`
322
323			`return ARMul_ReadByte (state, address);`
324			`}`
325
326			`/***************************************************************************\`
327			`* Write Word (but don't tell anyone!) *`
328			`\***************************************************************************/`
329
330			`void`
331			`ARMul_WriteWord (ARMul_State * state, ARMword address, ARMword data)`
332			`{`
333			`#ifdef ABORTS`
334			`if (address >= LOWABORT && address < HIGHABORT)`
335			`{`
336			`ARMul_DATAABORT (address);`
337			`return;`
338			`}`
339			`else`
340			`{`
341			`ARMul_CLEARABORT;`
342			`}`
343			`#endif`
344
345			`PutWord (state, address, data, TRUE);`
346			`}`
347
348			`/***************************************************************************\`
349			`* Store Word, Sequential Cycle *`
350			`\***************************************************************************/`
351
352			`void`
353			`ARMul_StoreWordS (ARMul_State * state, ARMword address, ARMword data)`
354			`{`
355			`state->NumScycles++;`
356
357			`ARMul_WriteWord (state, address, data);`
358			`}`
359
360			`/***************************************************************************\`
361			`* Store Word, Non Sequential Cycle *`
362			`\***************************************************************************/`
363
364			`void`
365			`ARMul_StoreWordN (ARMul_State * state, ARMword address, ARMword data)`
366			`{`
367			`state->NumNcycles++;`
368
369			`ARMul_WriteWord (state, address, data);`
370			`}`
371
372			`/***************************************************************************\`
373			`* Store HalfWord, (Non Sequential Cycle) *`
374			`\***************************************************************************/`
375
376			`void`
377			`ARMul_StoreHalfWord (ARMul_State * state, ARMword address, ARMword data)`
378			`{`
379			`ARMword temp, offset;`
380
381			`state->NumNcycles++;`
382
383			`#ifdef VALIDATE`
384			`if (address == TUBE)`
385			`{`
386			`if (data == 4)`
387			`state->Emulate = FALSE;`
388			`else`
389			`(void) putc ((char) data, stderr); /* Write Char */`
390			`return;`
391			`}`
392			`#endif`
393
394			`temp = ARMul_ReadWord (state, address);`
395			`offset = (((ARMword) state->bigendSig * 2) ^ (address & 2)) << 3; /* bit offset into the word */`
396
397			`PutWord (state, address,`
398			`(temp & ~(0xffffL << offset)) \| ((data & 0xffffL) << offset),`
399			`TRUE);`
400			`}`
401
402			`/***************************************************************************\`
403			`* Write Byte (but don't tell anyone!) *`
404			`\***************************************************************************/`
405
406			`void`
407			`ARMul_WriteByte (ARMul_State * state, ARMword address, ARMword data)`
408			`{`
409			`ARMword temp, offset;`
410
411			`temp = ARMul_ReadWord (state, address);`
412			`offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3; /* bit offset into the word */`
413
414			`PutWord (state, address,`
415			`(temp & ~(0xffL << offset)) \| ((data & 0xffL) << offset),`
416			`TRUE);`
417			`}`
418
419			`/***************************************************************************\`
420			`* Store Byte, (Non Sequential Cycle) *`
421			`\***************************************************************************/`
422
423			`void`
424			`ARMul_StoreByte (ARMul_State * state, ARMword address, ARMword data)`
425			`{`
426			`state->NumNcycles++;`
427
428			`#ifdef VALIDATE`
429			`if (address == TUBE)`
430			`{`
431			`if (data == 4)`
432			`state->Emulate = FALSE;`
433			`else`
434			`(void) putc ((char) data, stderr); /* Write Char */`
435			`return;`
436			`}`
437			`#endif`
438
439			`ARMul_WriteByte (state, address, data);`
440			`}`
441
442			`/***************************************************************************\`
443			`* Swap Word, (Two Non Sequential Cycles) *`
444			`\***************************************************************************/`
445
446			`ARMword ARMul_SwapWord (ARMul_State * state, ARMword address, ARMword data)`
447			`{`
448			`ARMword temp;`
449
450			`state->NumNcycles++;`
451
452			`temp = ARMul_ReadWord (state, address);`
453
454			`state->NumNcycles++;`
455
456			`PutWord (state, address, data, TRUE);`
457
458			`return temp;`
459			`}`
460
461			`/***************************************************************************\`
462			`* Swap Byte, (Two Non Sequential Cycles) *`
463			`\***************************************************************************/`
464
465			`ARMword ARMul_SwapByte (ARMul_State * state, ARMword address, ARMword data)`
466			`{`
467			`ARMword temp;`
468
469			`temp = ARMul_LoadByte (state, address);`
470			`ARMul_StoreByte (state, address, data);`
471
472			`return temp;`
473			`}`
474
475			`/***************************************************************************\`
476			`* Count I Cycles *`
477			`\***************************************************************************/`
478
479			`void`
480			`ARMul_Icycles (ARMul_State * state, unsigned number, ARMword address ATTRIBUTE_UNUSED)`
481			`{`
482			`state->NumIcycles += number;`
483			`ARMul_CLEARABORT;`
484			`}`
485
486			`/***************************************************************************\`
487			`* Count C Cycles *`
488			`\***************************************************************************/`
489
490			`void`
491			`ARMul_Ccycles (ARMul_State * state, unsigned number, ARMword address ATTRIBUTE_UNUSED)`
492			`{`
493			`state->NumCcycles += number;`
494			`ARMul_CLEARABORT;`
495			`}`
496
497
498			`/* Read a byte. Do not check for alignment or access errors. */`
499
500			`ARMword`
501			`ARMul_SafeReadByte (ARMul_State * state, ARMword address)`
502			`{`
503			`ARMword temp, offset;`
504
505			`temp = GetWord (state, address, FALSE);`
506			`offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3;`
507
508			`return (temp >> offset & 0xffL);`
509			`}`
510
511			`void`
512			`ARMul_SafeWriteByte (ARMul_State * state, ARMword address, ARMword data)`
513			`{`
514			`ARMword temp, offset;`
515
516			`temp = GetWord (state, address, FALSE);`
517			`offset = (((ARMword) state->bigendSig * 3) ^ (address & 3)) << 3;`
518
519			`PutWord (state, address,`
520			`(temp & ~(0xffL << offset)) \| ((data & 0xffL) << offset),`
521			`FALSE);`
522			`}`