/[gxemul]/trunk/src/include/memory.h
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Contents of /trunk/src/include/memory.h

Parent Directory Parent Directory | Revision Log Revision Log

Revision 6 - (show annotations)
Mon Oct 8 16:18:11 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 6432 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.772 2005/06/04 12:02:16 debug Exp $
20050428	Disabling the "-fmove-all-movables" option in the configure
		script, because it causes the compile to fail on OpenBSD/sgi.
20050502	Minor updates.
20050503	Removing the WRT54G mode (it was bogus anyway), and adding a
		comment about Windows NT for MIPS in doc/experiments.html.
		Minor updates to the x86 instruction decoding.
20050504	Adding some more x86 instructions.
		Adding support for reading files from ISO9660 CDROMs (including
		gzipped files). It's an ugly hack, but it seems to work.
		Various other minor updates (dev_vga.c, pc_bios.c etc).
20050505	Some more x86-related updates.
		Beginning (what I hope will be) a major code cleanup phase.
		"bootris" (an x86 bootsector) runs :-)
20050506	Adding some more x86 instructions.
20050507	tmpnam => mkstemp.
		Working on a hack to allow VGA charcells to be shown even when
		not running with X11.
		Adding more x86 instructions.
20050508	x86 32-bit SIB addressing fix, and more instructions.
20050509	Adding more x86 instructions.
20050510	Minor documentation updates, and other updates (x86 stuff etc.)
20050511	More x86-related updates.
20050513	Various updates, mostly x86-related. (Trying to fix flag 
		calculation, factoring out the ugly shift/rotate code, and
		some other things.)
20050514	Adding support for loading some old i386 a.out executables.
		Finally beginning the cleanup of machine/PROM/bios dependant
		info.
		Some minor documentation updates.
		Trying to clean up ARCBIOS stuff a little.
20050515	Trying to make it possible to actually use more than one disk
		type per machine (floppy, ide, scsi).
		Trying to clean up the kbd vs PROM console stuff. (For PC and
		ARC emulation modes, mostly.)
		Beginning to add an 8259 interrupt controller, and connecting
		it to the x86 emulation.
20050516	The first x86 interrupts seem to work (keyboard stuff).
		Adding a 8253/8254 programmable interval timer skeleton.
		FreeDOS now reaches a command prompt and can be interacted
		with.
20050517	After some bugfixes, MS-DOS also (sometimes) reaches a
		command prompt now.
		Trying to fix the pckbc to work with MS-DOS' keyb.com, but no
		success yet.
20050518	Adding a simple 32-bit x86 MMU skeleton.
20050519	Some more work on the x86 stuff. (Beginning the work on paging,
		and various other fixes).
20050520	More updates. Working on dev_vga (4-bit graphics modes), adding
		40 columns support to the PC bios emulation.
		Trying to add support for resizing windows when switching
		between graphics modes.
20050521	Many more x86-related updates.
20050522	Correcting the initial stack pointer's sign-extension for
		ARCBIOS emulation (thanks to Alec Voropay for noticing the
		error).
		Continuing on the cleanup (ARCBIOS etc).
		dev_vga updates.
20050523	More x86 updates: trying to add some support for protected mode
		interrupts (via gate descriptors) and many other fixes.
		More ARCBIOS cleanup.
		Adding a device flag which indicates that reads cause no
		side-effects. (Useful for the "dump" command in the debugger,
		and other things.)
		Adding support for directly starting up x86 ELFs, skipping the
		bootloader stage. (Most ELFs, however, are not suitable for
		this.)
20050524	Adding simple 32-bit x86 TSS task switching, but no privilege
		level support yet.
		More work on dev_vga. A small "Copper bars" demo works. :-)
		Adding support for Trap Flag (single-step exceptions), at least
		in real mode, and various other x86-related fixes.
20050525	Adding a new disk image prefix (gH;S;) which can be used to
		override the default nr of heads and sectors per track.
20050527	Various bug fixes, more work on the x86 mode (stack change on
		interrupts between different priv.levels), and some minor
		documentation updates.
20050528	Various fixes (x86 stuff).
20050529	More x86 fixes. An OpenBSD/i386 bootfloppy reaches userland
		and can be interacted with (although there are problems with
		key repetition). NetBSD/i386 triggers a serious CISC-related
		problem: instruction fetches across page boundaries, where
		the later part isn't actually part of the instruction.
20050530	Various minor updates. (Documentation updates, etc.)
20050531	Adding some experimental code (experiments/new_test_*) which
		could be useful for dynamic (but not binary) translation in
		the future.
20050602	Adding a dummy ARM skeleton.
		Fixing the pckbc key repetition problem (by adding release
		scancodes for all keypresses).
20050603	Minor updates for the next release.
20050604	Release testing. Minor updates.

==============  RELEASE 0.3.3  ==============

20050604	There'll probably be a 0.3.3.1 release soon, with some very
		very tiny updates.
1 #ifndef MEMORY_H
2 #define MEMORY_H
3
4 /*
5 * Copyright (C) 2004-2005 Anders Gavare. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 *
31 * $Id: memory.h,v 1.32 2005/05/23 14:22:03 debug Exp $
32 *
33 * Memory controller related functions.
34 */
35
36 #include <sys/types.h>
37 #include <inttypes.h>
38
39 #include "misc.h"
40
41
42 #define DEFAULT_RAM_IN_MB 32
43 #define MAX_DEVICES 24
44
45 #define DEVICE_STATE_TYPE_INT 1
46 #define DEVICE_STATE_TYPE_UINT64_T 2
47
48 struct cpu;
49 struct translation_page_entry;
50
51 /* For bintrans: */
52 #define MAX_QUICK_JUMPS 8
53
54 struct memory {
55 uint64_t physical_max;
56 void *pagetable;
57
58 int n_mmapped_devices;
59 int last_accessed_device;
60 /* The following two might speed up things a little bit. */
61 /* (actually maxaddr is the addr after the last address) */
62 uint64_t mmap_dev_minaddr;
63 uint64_t mmap_dev_maxaddr;
64
65 const char *dev_name[MAX_DEVICES];
66 uint64_t dev_baseaddr[MAX_DEVICES];
67 uint64_t dev_length[MAX_DEVICES];
68 int dev_flags[MAX_DEVICES];
69 void *dev_extra[MAX_DEVICES];
70 int (*dev_f[MAX_DEVICES])(struct cpu *,struct memory *,
71 uint64_t,unsigned char *,size_t,int,void *);
72 int (*dev_f_state[MAX_DEVICES])(struct cpu *,
73 struct memory *, void *extra, int wf, int nr,
74 int *type, char **namep, void **data, size_t *len);
75 unsigned char *dev_bintrans_data[MAX_DEVICES];
76
77 #ifdef BINTRANS
78 uint64_t dev_bintrans_write_low[MAX_DEVICES];
79 uint64_t dev_bintrans_write_high[MAX_DEVICES];
80
81 /*
82 * translation_code_chunk_space is a large chunk of (linear) memory
83 * where translated code chunks and translation_entrys are stored.
84 * When this is filled, translation is restart from scratch (by
85 * resetting translation_code_chunk_space_head to 0, and removing all
86 * translation entries).
87 *
88 * (Using a static memory region like this is somewhat inspired by
89 * the QEMU web pages,
90 * http://fabrice.bellard.free.fr/qemu/qemu-tech.html#SEC13)
91 */
92
93 unsigned char *translation_code_chunk_space;
94 size_t translation_code_chunk_space_head;
95
96 int bintrans_32bit_only;
97
98 struct translation_page_entry **translation_page_entry_array;
99
100 unsigned char *quick_jump_host_address[MAX_QUICK_JUMPS];
101 int quick_jump_page_offset[MAX_QUICK_JUMPS];
102 int n_quick_jumps;
103 int quick_jumps_index;
104 #endif
105 };
106
107 #define BITS_PER_PAGETABLE 20
108 #define BITS_PER_MEMBLOCK 20
109 #define MAX_BITS 40
110
111 #define MEM_READ 0
112 #define MEM_WRITE 1
113
114
115 #define CACHE_DATA 0
116 #define CACHE_INSTRUCTION 1
117 #define CACHE_NONE 2
118
119 #define CACHE_FLAGS_MASK 0x3
120
121 #define NO_EXCEPTIONS 16
122 #define PHYSICAL 32
123 #define NO_SEGMENTATION 64 /* for X86 */
124
125
126 /* memory.c: */
127 uint64_t memory_readmax64(struct cpu *cpu, unsigned char *buf, int len);
128 void memory_writemax64(struct cpu *cpu, unsigned char *buf, int len,
129 uint64_t data);
130
131 void *zeroed_alloc(size_t s);
132
133 struct memory *memory_new(uint64_t physical_max);
134
135 int memory_points_to_string(struct cpu *cpu, struct memory *mem,
136 uint64_t addr, int min_string_length);
137 char *memory_conv_to_string(struct cpu *cpu, struct memory *mem,
138 uint64_t addr, char *buf, int bufsize);
139
140 unsigned char *memory_paddr_to_hostaddr(struct memory *mem,
141 uint64_t paddr, int writeflag);
142
143 /* memory_fast_v2h.c: */
144 unsigned char *fast_vaddr_to_hostaddr(struct cpu *cpu, uint64_t vaddr,
145 int writeflag);
146
147 /* MIPS stuff: */
148 int translate_address_mmu3k(struct cpu *cpu, uint64_t vaddr,
149 uint64_t *return_addr, int flags);
150 int translate_address_mmu8k(struct cpu *cpu, uint64_t vaddr,
151 uint64_t *return_addr, int flags);
152 int translate_address_mmu10k(struct cpu *cpu, uint64_t vaddr,
153 uint64_t *return_addr, int flags);
154 int translate_address_mmu4100(struct cpu *cpu, uint64_t vaddr,
155 uint64_t *return_addr, int flags);
156 int translate_address_generic(struct cpu *cpu, uint64_t vaddr,
157 uint64_t *return_addr, int flags);
158
159 /* X86 stuff: */
160 int translate_address_x86(struct cpu *cpu, uint64_t vaddr,
161 uint64_t *return_addr, int flags);
162
163
164 #define FLAG_WRITEFLAG 1
165 #define FLAG_NOEXCEPTIONS 2
166 #define FLAG_INSTR 4
167
168 int userland_memory_rw(struct cpu *cpu, struct memory *mem, uint64_t vaddr,
169 unsigned char *data, size_t len, int writeflag, int cache);
170 #define MEMORY_ACCESS_FAILED 0
171 #define MEMORY_ACCESS_OK 1
172
173 void memory_device_bintrans_access(struct cpu *, struct memory *mem,
174 void *extra, uint64_t *low, uint64_t *high);
175
176 void memory_device_register_statefunction(
177 struct memory *mem, void *extra,
178 int (*dev_f_state)(struct cpu *,
179 struct memory *, void *extra, int wf, int nr,
180 int *type, char **namep, void **data, size_t *len));
181
182 void memory_device_register(struct memory *mem, const char *,
183 uint64_t baseaddr, uint64_t len, int (*f)(struct cpu *,
184 struct memory *,uint64_t,unsigned char *,size_t,int,void *),
185 void *extra, int flags, unsigned char *bintrans_data);
186 void memory_device_remove(struct memory *mem, int i);
187
188 /* Bit flags: */
189 #define MEM_DEFAULT 0
190 #define MEM_BINTRANS_OK 1
191 #define MEM_BINTRANS_WRITE_OK 2
192 #define MEM_READING_HAS_NO_SIDE_EFFECTS 4
193
194
195 #endif /* MEMORY_H */
  ViewVC Help
Powered by ViewVC 1.1.26