/[gxemul]/trunk/src/cpus/cpu_alpha_instr_loadstore.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Annotation of /trunk/src/cpus/cpu_alpha_instr_loadstore.c

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Revision 14 - (hide annotations)
Mon Oct 8 16:18:51 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 8755 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.982 2005/10/07 22:45:32 debug Exp $
20050816	Some success in decoding the way the SGI O2 PROM draws graphics
		during bootup; lines/rectangles and bitmaps work, enough to
		show the bootlogo etc. :-)
		Adding more PPC instructions, and (dummy) BAT registers.
20050817	Updating the pckbc to support scancode type 3 keyboards
		(required in order to interact with the SGI O2 PROM).
		Adding more PPC instructions.
20050818	Adding more ARM instructions; general register forms.
		Importing armreg.h from NetBSD (ARM cpu ids). Adding a (dummy)
		CATS machine mode (using SA110 as the default CPU).
		Continuing on general dyntrans related stuff.
20050819	Register forms for ARM load/stores. Gaah! The Compaq C Compiler
		bug is triggered for ARM loads as well, not just PPC :-(
		Adding full support for ARM PC-relative load/stores, and load/
		stores where the PC register is the destination register.
		Adding support for ARM a.out binaries.
20050820	Continuing to add more ARM instructions, and correcting some
		bugs. Continuing on CATS emulation.
		More work on the PPC stuff.
20050821	Minor PPC and ARM updates. Adding more machine types.
20050822	All ARM "data processing instructions" are now generated
		automatically.
20050824	Beginning the work on the ARM system control coprocessor.
		Adding support for ARM halfword load/stores, and signed loads.
20050825	Fixing an important bug related to the ARM condition codes.
		OpenBSD/zaurus and NetBSD/netwinder now print some boot
		messages. :)
		Adding a dummy SH (Hitachi SuperH) cpu family.
		Beginning to add some ARM virtual address translation.
		MIPS bugfixes: unaligned PC now cause an ADEL exception (at
		least for non-bintrans execution), and ADEL/ADES (not
		TLBL/TLBS) are used if userland tries to access kernel space.
		(Thanks to Joshua Wise for making me aware of these bugs.)
20050827	More work on the ARM emulation, and various other updates.
20050828	More ARM updates.
		Finally taking the time to work on translation invalidation
		(i.e. invalidating translated code mappings when memory is
		written to). Hopefully this doesn't break anything.
20050829	Moving CPU related files from src/ to a new subdir, src/cpus/.
		Moving PROM emulation stuff from src/ to src/promemul/.
		Better debug instruction trace for ARM loads and stores.
20050830	Various ARM updates (correcting CMP flag calculation, etc).
20050831	PPC instruction updates. (Flag fixes, etc.)
20050901	Various minor PPC and ARM instruction emulation updates.
		Minor OpenFirmware emulation updates.
20050903	Adding support for adding arbitrary ARM coprocessors (with
		the i80321 I/O coprocessor as a first test).
		Various other ARM and PPC updates.
20050904	Adding some SHcompact disassembly routines.
20050907	(Re)adding a dummy HPPA CPU module, and a dummy i960 module.
20050908	Began hacking on some Apple Partition Table support.
20050909	Adding support for loading Mach-O (Darwin PPC) binaries.
20050910	Fixing an ARM bug (Carry flag was incorrectly updated for some
		data processing instructions); OpenBSD/cats and NetBSD/
		netwinder get quite a bit further now.
		Applying a patch to dev_wdc, and a one-liner to dev_pcic, to
		make them work better when emulating new versions of OpenBSD.
		(Thanks to Alexander Yurchenko for the patches.)
		Also doing some other minor updates to dev_wdc. (Some cleanup,
		and finally converting to devinit, etc.)
20050912	IRIX doesn't have u_int64_t by default (noticed by Andreas
		<avr@gnulinux.nl>); configure updated to reflect this.
		Working on ARM register bank switching, CPSR vs SPSR issues,
		and beginning the work on interrupt/exception support.
20050913	Various minor ARM updates (speeding up load/store multiple,
		and fixing a ROR bug in R(); NetBSD/cats now boots as far as
		OpenBSD/cats).
20050917	Adding a dummy Atmel AVR (8-bit) cpu family skeleton.
20050918	Various minor updates.
20050919	Symbols are now loaded from Mach-O executables.
		Continuing the work on adding ARM exception support.
20050920	More work on ARM stuff: OpenBSD/cats and NetBSD/cats reach
		userland! :-)
20050921	Some more progress on ARM interrupt specifics.
20050923	Fixing linesize for VR4121 (patch by Yurchenko). Also fixing
		linesizes/cachesizes for some other VR4xxx.
		Adding a dummy Acer Labs M1543 PCI-ISA bridge (for CATS) and a
		dummy Symphony Labs 83C553 bridge (for Netwinder), usable by 
		dev_footbridge.
20050924	Some PPC progress.
20050925	More PPC progress.
20050926	PPC progress (fixing some bugs etc); Darwin's kernel gets
		slightly further than before.
20050928	Various updates: footbridge/ISA/pciide stuff, and finally
		fixing the VGA text scroll-by-changing-the-base-offset bug.
20050930	Adding a dummy S3 ViRGE pci card for CATS emulation, which
		both NetBSD and OpenBSD detects as VGA.
		Continuing on Footbridge (timers, ISA interrupt stuff).
20051001	Continuing... there are still bugs, probably interrupt-
		related.
20051002	More work on the Footbridge (interrupt stuff).
20051003	Various minor updates. (Trying to find the bug(s).)
20051004	Continuing on the ARM stuff.
20051005	More ARM-related fixes.
20051007	FINALLY! Found and fixed 2 ARM bugs: 1 memory related, and the
		other was because of an error in the ARM manual (load multiple
		with the S-bit set should _NOT_ load usermode registers, as the
		manual says, but it should load saved registers, which may or
		may not happen to be usermode registers).
		NetBSD/cats and OpenBSD/cats seem to install fine now :-)
		except for a minor bug at the end of the OpenBSD/cats install.
		Updating the documentation, preparing for the next release.
20051008	Continuing with release testing and cleanup.
1 dpavlin 14 /*
2     * Copyright (C) 2005 Anders Gavare. All rights reserved.
3     *
4     * Redistribution and use in source and binary forms, with or without
5     * modification, are permitted provided that the following conditions are met:
6     *
7     * 1. Redistributions of source code must retain the above copyright
8     * notice, this list of conditions and the following disclaimer.
9     * 2. Redistributions in binary form must reproduce the above copyright
10     * notice, this list of conditions and the following disclaimer in the
11     * documentation and/or other materials provided with the distribution.
12     * 3. The name of the author may not be used to endorse or promote products
13     * derived from this software without specific prior written permission.
14     *
15     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25     * SUCH DAMAGE.
26     *
27     *
28     * $Id: cpu_alpha_instr_loadstore.c,v 1.1 2005/08/29 14:36:41 debug Exp $
29     *
30     * Alpha load/store instructions. (Included from cpu_alpha_instr_inc.c.)
31     *
32     *
33     * Load/store instructions have the following arguments:
34     *
35     * arg[0] = pointer to the register to load to or store from (uint64_t)
36     * arg[1] = pointer to the base register (uint64_t)
37     * arg[2] = offset (as an int32_t)
38     *
39     * NOTE:
40     * Alpha byte and word loads (8- and 16-bit) are unsigned, while
41     * 32-bit long words are sign-extended up to 64 bits during a load!
42     */
43    
44    
45     #ifndef LS_IGNORE_OFFSET
46     #ifndef LS_ALIGN_CHECK
47     static void LS_GENERIC_N(struct cpu *cpu, struct alpha_instr_call *ic)
48     {
49     #ifdef LS_B
50     unsigned char data[1];
51     #endif
52     #ifdef LS_W
53     unsigned char data[2];
54     #endif
55     #ifdef LS_L
56     unsigned char data[4];
57     #endif
58     #ifdef LS_Q
59     unsigned char data[8];
60     #endif
61     uint64_t addr = *((uint64_t *)ic->arg[1]);
62     uint64_t data_x;
63    
64     addr += (int32_t)ic->arg[2];
65     #ifdef LS_UNALIGNED
66     addr &= ~7;
67     #endif
68    
69     #ifdef LS_LOAD
70     /* Load: */
71     if (!cpu->memory_rw(cpu, cpu->mem, addr, data, sizeof(data),
72     MEM_READ, CACHE_DATA)) {
73     fatal("store failed: TODO\n");
74     exit(1);
75     }
76    
77     data_x = data[0];
78     #ifndef LS_B
79     data_x += (data[1] << 8);
80     #ifndef LS_W
81     data_x += (data[2] << 16);
82     data_x += (data[3] << 24);
83     #ifdef LS_L
84     data_x = (int64_t)(int32_t)data_x;
85     #endif
86     #ifndef LS_L
87     data_x += ((uint64_t)data[4] << 32);
88     data_x += ((uint64_t)data[5] << 40);
89     data_x += ((uint64_t)data[6] << 48);
90     data_x += ((uint64_t)data[7] << 56);
91     #endif
92     #endif
93     #endif
94     *((uint64_t *)ic->arg[0]) = data_x;
95     #else
96     /* Store: */
97     data_x = *((uint64_t *)ic->arg[0]);
98     data[0] = data_x;
99     #ifndef LS_B
100     data[1] = data_x >> 8;
101     #ifndef LS_W
102     data[2] = data_x >> 16;
103     data[3] = data_x >> 24;
104     #ifndef LS_L
105     data[4] = data_x >> 32;
106     data[5] = data_x >> 40;
107     data[6] = data_x >> 48;
108     data[7] = data_x >> 56;
109     #endif
110     #endif
111     #endif
112    
113     if (!cpu->memory_rw(cpu, cpu->mem, addr, data, sizeof(data),
114     MEM_WRITE, CACHE_DATA)) {
115     fatal("store failed: TODO\n");
116     exit(1);
117     }
118    
119     #ifdef LS_LLSC
120     #ifndef LS_LOAD
121     *((uint64_t *)ic->arg[0]) = 1;
122     #endif
123     #endif
124    
125     #endif
126     }
127     #endif
128     #endif
129    
130    
131     static void LS_N(struct cpu *cpu, struct alpha_instr_call *ic)
132     {
133     int first, a, b, c;
134     uint64_t addr;
135    
136     addr = (*((uint64_t *)ic->arg[1]))
137     #ifndef LS_IGNORE_OFFSET
138     + (int32_t)ic->arg[2]
139     #endif
140     ;
141    
142     #ifdef LS_UNALIGNED
143     addr &= ~7;
144     #endif
145    
146     #ifdef LS_LLSC
147     #ifdef LS_LOAD
148     /* TODO: cache-line size! */
149     cpu->cd.alpha.load_linked_addr = addr & ~63;
150     cpu->cd.alpha.ll_flag = 1;
151     #else
152     /* TODO: only invalidate per cache line, not everything! */
153     if (cpu->cd.alpha.ll_flag == 1) {
154     int i;
155     for (i=0; i<cpu->machine->ncpus; i++)
156     cpu->machine->cpus[i]->cd.alpha.ll_flag = 0;
157     } else {
158     *((uint64_t *)ic->arg[0]) = 0;
159     return;
160     }
161     #endif
162     #endif
163    
164     first = addr >> ALPHA_TOPSHIFT;
165     a = (addr >> ALPHA_LEVEL0_SHIFT) & (ALPHA_LEVEL0 - 1);
166     b = (addr >> ALPHA_LEVEL1_SHIFT) & (ALPHA_LEVEL1 - 1);
167     c = addr & 8191;
168    
169     #ifdef LS_ALIGN_CHECK
170     #ifndef LS_B
171     if (c &
172     #ifdef LS_W
173     1
174     #endif
175     #ifdef LS_L
176     3
177     #endif
178     #ifdef LS_Q
179     7
180     #endif
181     ) {
182     LS_GENERIC_N(cpu, ic);
183     return;
184     }
185     else
186     #endif
187     #endif
188    
189     if (first == 0) {
190     struct alpha_vph_page *vph_p;
191     unsigned char *page;
192     vph_p = cpu->cd.alpha.vph_table0[a];
193     #ifdef LS_LOAD
194     page = vph_p->host_load[b];
195     #else
196     page = vph_p->host_store[b];
197     #endif
198     if (page != NULL) {
199     #ifdef LS_LOAD
200     #ifdef HOST_BIG_ENDIAN
201     uint64_t data_x;
202     data_x = page[c];
203     #ifndef LS_B
204     data_x += (page[c+1] << 8);
205     #ifndef LS_W
206     data_x += (page[c+2] << 16);
207     data_x += (page[c+3] << 24);
208     #ifndef LS_L
209     data_x += ((uint64_t)page[c+4] << 32);
210     data_x += ((uint64_t)page[c+5] << 40);
211     data_x += ((uint64_t)page[c+6] << 48);
212     data_x += ((uint64_t)page[c+7] << 56);
213     #endif
214     #endif
215     #endif
216     #ifdef LS_L
217     *((uint64_t *)ic->arg[0]) = (int64_t)(int32_t)data_x;
218     #else
219     *((uint64_t *)ic->arg[0]) = data_x;
220     #endif
221     #else
222     #ifdef LS_B
223     *((uint64_t *)ic->arg[0]) = page[c];
224     #endif
225     #ifdef LS_W
226     uint16_t d = *((uint16_t *) (page + c));
227     *((uint64_t *)ic->arg[0]) = d;
228     #endif
229     #ifdef LS_L
230     int32_t d = *((int32_t *) (page + c));
231     *((uint64_t *)ic->arg[0]) = (int64_t)d;
232     #endif
233     #ifdef LS_Q
234     uint64_t d = *((uint64_t *) (page + c));
235     *((uint64_t *)ic->arg[0]) = d;
236     #endif
237     #endif
238     #else
239     /* Store: */
240     #ifdef HOST_BIG_ENDIAN
241     uint64_t data_x = *((uint64_t *)ic->arg[0]);
242     page[c] = data_x;
243     #ifndef LS_B
244     page[c+1] = data_x >> 8;
245     #ifndef LS_W
246     page[c+2] = data_x >> 16;
247     page[c+3] = data_x >> 24;
248     #ifndef LS_L
249     page[c+4] = data_x >> 32;
250     page[c+5] = data_x >> 40;
251     page[c+6] = data_x >> 48;
252     page[c+7] = data_x >> 56;
253     #endif
254     #endif
255     #endif
256     #else
257     /* Native byte order: */
258     #ifdef LS_B
259     page[c] = *((uint64_t *)ic->arg[0]);
260     #endif
261     #ifdef LS_W
262     uint32_t d = *((uint64_t *)ic->arg[0]);
263     *((uint16_t *) (page + c)) = d;
264     #endif
265     #ifdef LS_L
266     uint32_t d = *((uint64_t *)ic->arg[0]);
267     *((uint32_t *) (page + c)) = d;
268     #endif
269     #ifdef LS_Q
270     uint64_t d = *((uint64_t *)ic->arg[0]);
271     *((uint64_t *) (page + c)) = d;
272     #endif
273     #endif
274    
275     #ifdef LS_LLSC
276     #ifndef LS_LOAD
277     *((uint64_t *)ic->arg[0]) = 1;
278     #endif
279     #endif
280    
281     #endif /* !LS_LOAD */
282     } else
283     LS_GENERIC_N(cpu, ic);
284     } else if (first == ALPHA_TOP_KERNEL) {
285     struct alpha_vph_page *vph_p;
286     unsigned char *page;
287     vph_p = cpu->cd.alpha.vph_table0_kernel[a];
288     #ifdef LS_LOAD
289     page = vph_p->host_load[b];
290     #else
291     page = vph_p->host_store[b];
292     #endif
293     if (page != NULL) {
294     #ifdef LS_LOAD
295     #ifdef HOST_BIG_ENDIAN
296     uint64_t data_x;
297     data_x = page[c];
298     #ifndef LS_B
299     data_x += (page[c+1] << 8);
300     #ifndef LS_W
301     data_x += (page[c+2] << 16);
302     data_x += (page[c+3] << 24);
303     #ifndef LS_L
304     data_x += ((uint64_t)page[c+4] << 32);
305     data_x += ((uint64_t)page[c+5] << 40);
306     data_x += ((uint64_t)page[c+6] << 48);
307     data_x += ((uint64_t)page[c+7] << 56);
308     #endif
309     #endif
310     #endif
311     #ifdef LS_L
312     *((uint64_t *)ic->arg[0]) = (int64_t)(int32_t)data_x;
313     #else
314     *((uint64_t *)ic->arg[0]) = data_x;
315     #endif
316     #else
317     #ifdef LS_B
318     *((uint64_t *)ic->arg[0]) = page[c];
319     #endif
320     #ifdef LS_W
321     uint16_t d = *((uint16_t *) (page + c));
322     *((uint64_t *)ic->arg[0]) = d;
323     #endif
324     #ifdef LS_L
325     int32_t d = *((int32_t *) (page + c));
326     *((uint64_t *)ic->arg[0]) = (int64_t)d;
327     #endif
328     #ifdef LS_Q
329     uint64_t d = *((uint64_t *) (page + c));
330     *((uint64_t *)ic->arg[0]) = d;
331     #endif
332     #endif
333     #else
334     /* Store: */
335     #ifdef HOST_BIG_ENDIAN
336     uint64_t data_x = *((uint64_t *)ic->arg[0]);
337     page[c] = data_x;
338     #ifndef LS_B
339     page[c+1] = data_x >> 8;
340     #ifndef LS_W
341     page[c+2] = data_x >> 16;
342     page[c+3] = data_x >> 24;
343     #ifndef LS_L
344     page[c+4] = data_x >> 32;
345     page[c+5] = data_x >> 40;
346     page[c+6] = data_x >> 48;
347     page[c+7] = data_x >> 56;
348     #endif
349     #endif
350     #endif
351     #else
352     /* Native byte order: */
353     #ifdef LS_B
354     page[c] = *((uint64_t *)ic->arg[0]);
355     #endif
356     #ifdef LS_W
357     uint32_t d = *((uint64_t *)ic->arg[0]);
358     *((uint16_t *) (page + c)) = d;
359     #endif
360     #ifdef LS_L
361     uint32_t d = *((uint64_t *)ic->arg[0]);
362     *((uint32_t *) (page + c)) = d;
363     #endif
364     #ifdef LS_Q
365     uint64_t d = *((uint64_t *)ic->arg[0]);
366     *((uint64_t *) (page + c)) = d;
367     #endif
368     #endif
369    
370     #ifdef LS_LLSC
371     #ifndef LS_LOAD
372     *((uint64_t *)ic->arg[0]) = 1;
373     #endif
374     #endif
375    
376     #endif /* !LS_LOAD */
377     } else
378     LS_GENERIC_N(cpu, ic);
379     } else
380     LS_GENERIC_N(cpu, ic);
381     }
382    
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