Parent Directory | Revision Log
++ 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 | /* |
2 | * Copyright (C) 2004-2005 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: dev_ram.c,v 1.14 2005/05/23 14:22:02 debug Exp $ |
29 | * |
30 | * A generic RAM (memory) device. Can also be used to mirror/alias another |
31 | * part of RAM. |
32 | */ |
33 | |
34 | #include <stdio.h> |
35 | #include <stdlib.h> |
36 | #include <string.h> |
37 | #include <sys/types.h> |
38 | #include <sys/mman.h> |
39 | |
40 | #include "console.h" |
41 | #include "cpu.h" |
42 | #include "devices.h" |
43 | #include "memory.h" |
44 | #include "misc.h" |
45 | |
46 | |
47 | /* #define RAM_DEBUG */ |
48 | |
49 | struct ram_data { |
50 | int mode; |
51 | uint64_t otheraddress; |
52 | |
53 | /* If mode = DEV_RAM_RAM: */ |
54 | unsigned char *data; |
55 | uint64_t length; |
56 | }; |
57 | |
58 | |
59 | /* |
60 | * dev_ram_access(): |
61 | */ |
62 | int dev_ram_access(struct cpu *cpu, struct memory *mem, |
63 | uint64_t relative_addr, unsigned char *data, size_t len, |
64 | int writeflag, void *extra) |
65 | { |
66 | struct ram_data *d = extra; |
67 | |
68 | #ifdef RAM_DEBUG |
69 | if (writeflag==MEM_READ) { |
70 | debug("[ ram: read from 0x%x, len=%i ]\n", |
71 | (int)relative_addr, (int)len); |
72 | } else { |
73 | int i; |
74 | debug("[ ram: write to 0x%x:", (int)relative_addr); |
75 | for (i=0; i<len; i++) |
76 | debug(" %02x", data[i]); |
77 | debug(" (len=%i) ]\n", len); |
78 | } |
79 | #endif |
80 | |
81 | switch (d->mode) { |
82 | case DEV_RAM_MIRROR: |
83 | /* TODO: how about caches? */ |
84 | return cpu->memory_rw(cpu, mem, |
85 | d->otheraddress + relative_addr, data, len, |
86 | writeflag, PHYSICAL); |
87 | case DEV_RAM_RAM: |
88 | if (writeflag == MEM_WRITE) |
89 | memcpy(&d->data[relative_addr], data, len); |
90 | else |
91 | memcpy(data, &d->data[relative_addr], len); |
92 | break; |
93 | default: |
94 | fatal("dev_ram_access(): unknown mode %i\n", d->mode); |
95 | exit(1); |
96 | } |
97 | |
98 | return 1; |
99 | } |
100 | |
101 | |
102 | /* |
103 | * dev_ram_init(): |
104 | */ |
105 | void dev_ram_init(struct memory *mem, uint64_t baseaddr, uint64_t length, |
106 | int mode, uint64_t otheraddress) |
107 | { |
108 | struct ram_data *d; |
109 | |
110 | d = malloc(sizeof(struct ram_data)); |
111 | if (d == NULL) { |
112 | fprintf(stderr, "out of memory\n"); |
113 | exit(1); |
114 | } |
115 | |
116 | memset(d, 0, sizeof(struct ram_data)); |
117 | |
118 | d->mode = mode; |
119 | d->otheraddress = otheraddress; |
120 | |
121 | switch (d->mode) { |
122 | case DEV_RAM_MIRROR: |
123 | break; |
124 | case DEV_RAM_RAM: |
125 | /* |
126 | * Allocate zero-filled RAM using mmap(). If mmap() failed, |
127 | * try malloc(), but then we also have to memset(), which |
128 | * can be slow for large chunks of memory. |
129 | */ |
130 | d->length = length; |
131 | d->data = (unsigned char *) mmap(NULL, length, |
132 | PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); |
133 | if (d->data == NULL) { |
134 | d->data = malloc(length); |
135 | if (d->data == NULL) { |
136 | fprintf(stderr, "out of memory\n"); |
137 | exit(1); |
138 | } |
139 | memset(d->data, 0, length); |
140 | } |
141 | break; |
142 | default: |
143 | fatal("dev_ram_access(): unknown mode %i\n", d->mode); |
144 | exit(1); |
145 | } |
146 | |
147 | memory_device_register(mem, d->mode == DEV_RAM_MIRROR? |
148 | "ram [mirror]" : "ram", baseaddr, length, |
149 | dev_ram_access, d, MEM_DEFAULT | MEM_READING_HAS_NO_SIDE_EFFECTS, |
150 | NULL); |
151 | } |
152 |
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