/[gxemul]/trunk/src/cpus/memory_alpha.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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Contents of /trunk/src/cpus/memory_alpha.c

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Revision 26 - (show annotations)
Mon Oct 8 16:20:10 2007 UTC (13 years, 3 months ago) by dpavlin
File MIME type: text/plain
File size: 2535 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1264 2006/06/25 11:08:04 debug Exp $
20060624	Replacing the error-prone machine type initialization stuff
		with something more reasonable.
		Finally removing the old "cpu_run" kludge; moving around stuff
		in machine.c and emul.c to better suit the dyntrans system.
		Various minor dyntrans cleanups (renaming translate_address to
		translate_v2p, and experimenting with template physpages).
20060625	Removing the speed hack which separated the vph entries into
		two halves (code vs data); things seem a lot more stable now.
		Minor performance hack: R2000/R3000 cache isolation now only
		clears address translations when going into isolation, not
		when going out of it.
		Fixing the MIPS interrupt problems by letting mtc0 immediately
		cause interrupts.

==============  RELEASE 0.4.0.1  ==============


1 /*
2 * Copyright (C) 2006 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: memory_alpha.c,v 1.3 2006/06/24 21:47:23 debug Exp $
29 */
30
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34
35 #include "cpu.h"
36 #include "machine.h"
37 #include "memory.h"
38 #include "misc.h"
39
40
41 /*
42 * alpha_translate_v2p():
43 */
44 int alpha_translate_v2p(struct cpu *cpu, uint64_t vaddr,
45 uint64_t *return_paddr, int flags)
46 {
47 *return_paddr = vaddr & 0x000003ffffffffffULL;
48
49 /* UGLY hack for now: */
50 /* TODO: Real virtual memory support. */
51
52 if ((vaddr & ~0xffff) == 0xfffffc0010000000ULL ||
53 (vaddr & ~0xffff) == 0x0000000010000000ULL)
54 *return_paddr = (vaddr & 0x0fffffff) +
55 (cpu->machine->physical_ram_in_mb-1) * 1048576;
56
57 /* At 0x20000000, NetBSD stores temp prom data */
58 if ((vaddr & ~0x1fff) == 0xfffffc0020000000ULL ||
59 (vaddr & ~0x1fff) == 0x0000000020000000ULL)
60 *return_paddr = (vaddr & 0x0fffffff) + 512*1024 +
61 (cpu->machine->physical_ram_in_mb-1) * 1048576;
62
63 /* printf("yo %016"PRIx64" %016"PRIx64"\n", vaddr, *return_paddr); */
64
65 return 2;
66 }
67

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