/[gxemul]/trunk/src/devices/bus_isa.c
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/devices/bus_isa.c

Parent Directory Parent Directory | Revision Log Revision Log

Revision 42 - (show annotations)
Mon Oct 8 16:22:32 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 10587 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1613 2007/06/15 20:11:26 debug Exp $
20070501	Continuing a little on m88k disassembly (control registers,
		more instructions).
		Adding a dummy mvme88k machine mode.
20070502	Re-adding MIPS load/store alignment exceptions.
20070503	Implementing more of the M88K disassembly code.
20070504	Adding disassembly of some more M88K load/store instructions.
		Implementing some relatively simple M88K instructions (br.n,
		xor[.u] imm, and[.u] imm).
20070505	Implementing M88K three-register and, or, xor, and jmp[.n],
		bsr[.n] including function call trace stuff.
		Applying a patch from Bruce M. Simpson which implements the
		SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in
		the yamon PROM emulation.
20070506	Implementing M88K bb0[.n] and bb1[.n], and skeletons for
		ldcr and stcr (although no control regs are implemented yet).
20070509	Found and fixed the bug which caused Linux for QEMU_MIPS to
		stop working in 0.4.5.1: It was a faulty change to the MIPS
		'sc' and 'scd' instructions I made while going through gcc -W
		warnings on 20070428.
20070510	Updating the Linux/QEMU_MIPS section in guestoses.html to
		use mips-test-0.2.tar.gz instead of 0.1.
		A big thank you to Miod Vallat for sending me M88K manuals.
		Implementing more M88K instructions (addu, subu, div[u], mulu,
		ext[u], clr, set, cmp).
20070511	Fixing bugs in the M88K "and" and "and.u" instructions (found
		by comparing against the manual).
		Implementing more M88K instructions (mask[.u], mak, bcnd (auto-
		generated)) and some more control register details.
		Cleanup: Removing the experimental AVR emulation mode and
		corresponding devices; AVR emulation wasn't really meaningful.
		Implementing autogeneration of most M88K loads/stores. The
		rectangle drawing demo (with -O0) for M88K runs :-)
		Beginning on M88K exception handling.
		More M88K instructions: tb0, tb1, rte, sub, jsr[.n].
		Adding some skeleton MVME PROM ("BUG") emulation.
20070512	Fixing a bug in the M88K cmp instruction.
		Adding the M88K lda (scaled register) instruction.
		Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores.
		Removing the unused tick_hz stuff from the machine struct.
		Implementing the M88K xmem instruction. OpenBSD/mvme88k gets
		far enough to display the Copyright banner :-)
		Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1.
		Adding a dev_mvme187, for MVME187-specific devices/registers.
		OpenBSD/mvme88k prints more boot messages. :)
20070515	Continuing on MVME187 emulation (adding more devices, beginning
		on the CMMUs, etc).
		Adding the M88K and.c, xor.c, and or.c instructions, and making
		sure that mul, div, etc cause exceptions if executed when SFD1
		is disabled.
20070517	Continuing on M88K and MVME187 emulation in general; moving
		the CMMU registers to the CPU struct, separating dev_pcc2 from
		dev_mvme187, and beginning on memory_m88k.c (BATC and PATC).
		Fixing a bug in 64-bit (32-bit pairs) M88K fast stores.
		Implementing the clock part of dev_mk48txx.
		Implementing the M88K fstcr and xcr instructions.
		Implementing m88k_cpu_tlbdump().
		Beginning on the implementation of a separate address space
		for M88K .usr loads/stores.
20070520	Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK
		Dnard, and Zaurus machine modes.
		Experimenting with dyntrans to_be_translated read-ahead. It
		seems to give a very small performance increase for MIPS
		emulation, but a large performance degradation for SuperH. Hm.
20070522	Disabling correct SuperH ITLB emulation; it does not seem to be
		necessary in order to let SH4 guest OSes run, and it slows down
		userspace code.
		Implementing "samepage" branches for SuperH emulation, and some
		other minor speed hacks.
20070525	Continuing on M88K memory-related stuff: exceptions, memory
		transaction register contents, etc.
		Implementing the M88K subu.ci instruction.
		Removing the non-working (skeleton) Iyonix machine mode.
		OpenBSD/mvme88k reaches userland :-), starts executing
		/sbin/init's instructions, and issues a few syscalls, before
		crashing.
20070526	Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects
		the correct time-of-day.
		Implementing a generic IRQ controller for the test machines
		(dev_irqc), similar to a proposed patch from Petr Stepan.
		Experimenting some more with translation read-ahead.
		Adding an "expect" script for automated OpenBSD/landisk
		install regression/performance tests.
20070527	Adding a dummy mmEye (SH3) machine mode skeleton.
		FINALLY found the strange M88K bug I have been hunting: I had
		not emulated the SNIP value for exceptions occurring in
		branch delay slots correctly.
		Implementing correct exceptions for 64-bit M88K loads/stores.
		Address to symbol lookups are now disabled when M88K is
		running in usermode (because usermode addresses don't have
		anything to do with supervisor addresses).
20070531	Removing the mmEye machine mode skeleton.
20070604	Some minor code cleanup.
20070605	Moving src/useremul.c into a subdir (src/useremul/), and
		cleaning up some more legacy constructs.
		Adding -Wstrict-aliasing and -fstrict-aliasing detection to
		the configure script.
20070606	Adding a check for broken GCC on Solaris to the configure
		script. (GCC 3.4.3 on Solaris cannot handle static variables
		which are initialized to 0 or NULL. :-/)
		Removing the old (non-working) ARC emulation modes: NEC RD94,
		R94, R96, and R98, and the last traces of Olivetti M700 and
		Deskstation Tyne.
		Removing the non-working skeleton WDSC device (dev_wdsc).
20070607	Thinking about how to use the host's cc + ld at runtime to
		generate native code. (See experiments/native_cc_ld_test.i
		for an example.)
20070608	Adding a program counter sampling timer, which could be useful
		for native code generation experiments.
		The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR
		should always be set, to allow a 5000/200 PROM to boot.
20070609	Moving out breakpoint details from the machine struct into
		a helper struct, and removing the limit on max nr of
		breakpoints.
20070610	Moving out tick functions into a helper struct as well (which
		also gets rid of the max limit).
20070612	FINALLY figured out why Debian/DECstation stopped working when
		translation read-ahead was enabled: in src/memory_rw.c, the
		call to invalidate_code_translation was made also if the
		memory access was an instruction load (if the page was mapped
		as writable); it shouldn't be called in that case.
20070613	Implementing some more MIPS32/64 revision 2 instructions: di,
		ei, ext, dext, dextm, dextu, and ins.
20070614	Implementing an instruction combination for the NetBSD/arm
		idle loop (making the host not use any cpu if NetBSD/arm
		inside the emulator is not using any cpu).
		Increasing the nr of ARM VPH entries from 128 to 384.
20070615	Removing the ENABLE_arch stuff from the configure script, so
		that all included architectures are included in both release
		and development builds.
		Moving memory related helper functions from misc.c to memory.c.
		Adding preliminary instructions for netbooting NetBSD/pmppc to
		guestoses.html; it doesn't work yet, there are weird timeouts.
		Beginning a total rewrite of the userland emulation modes
		(removing all emulation modes, beginning from scratch with
		NetBSD/MIPS and FreeBSD/Alpha only).
20070616	After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was
		only cleared for the last segment when transmitting, not all
		segments), NetBSD/pmppc boots with root-on-nfs without the
		timeouts. Updating guestoses.html.
		Removing the skeleton PSP (Playstation Portable) mode.
		Moving X11-related stuff in the machine struct into a helper
		struct.
		Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION
		macro (which prints a meaningful error message).
		Adding a COMMENT to each machine and device (for automagic
		.index comment generation).
		Doing regression testing for the next release.

==============  RELEASE 0.4.6  ==============
1 /*
2 * Copyright (C) 2005-2007 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: bus_isa.c,v 1.19 2007/06/15 18:44:18 debug Exp $
29 *
30 * COMMENT: Generic ISA bus framework
31 *
32 * This is not a normal device, but it can be used as a quick way of adding
33 * most of the common legacy ISA devices to a machine.
34 */
35
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39
40 #define BUS_ISA_C
41
42 #include "bus_isa.h"
43 #include "device.h"
44 #include "devices.h"
45 #include "diskimage.h"
46 #include "interrupt.h"
47 #include "machine.h"
48 #include "misc.h"
49
50
51 /*
52 * isa_interrupt_common():
53 */
54 void isa_interrupt_common(struct bus_isa_data *d, int old_isa_assert)
55 {
56 int new_isa_assert, x;
57
58 /* Any interrupt assertions on PIC2 go to irq 2 on PIC1 */
59 /* (TODO: don't hardcode this here) */
60 if (d->pic2->irr & ~d->pic2->ier)
61 d->pic1->irr |= 0x04;
62 else
63 d->pic1->irr &= ~0x04;
64
65 /* printf("ISA: irr=%02x%02x ier=%02x%02x\n",
66 d->pic2->irr, d->pic1->irr, d->pic2->ier, d->pic1->ier); */
67
68 new_isa_assert = d->pic1->irr & ~d->pic1->ier;
69
70 if (old_isa_assert == new_isa_assert)
71 return;
72
73 if (!new_isa_assert) {
74 INTERRUPT_DEASSERT(d->irq);
75 return;
76 }
77
78 for (x=0; x<16; x++) {
79 if (x == 2)
80 continue;
81
82 if (x < 8 && (d->pic1->irr & ~d->pic1->ier & (1 << x)))
83 break;
84
85 if (x >= 8 && (d->pic2->irr & ~d->pic2->ier & (1 << (x&7))))
86 break;
87 }
88
89 *d->ptr_to_last_int = x;
90
91 INTERRUPT_ASSERT(d->irq);
92 }
93
94
95 /*
96 * isa_interrupt_assert():
97 *
98 * Called whenever an ISA device asserts an interrupt (0..15).
99 */
100 void isa_interrupt_assert(struct interrupt *interrupt)
101 {
102 struct bus_isa_data *d = interrupt->extra;
103 int old_isa_assert, line = interrupt->line;
104 int mask = 1 << (line & 7);
105
106 old_isa_assert = d->pic1->irr & ~d->pic1->ier;
107
108 if (line < 8)
109 d->pic1->irr |= mask;
110 else if (d->pic2 != NULL)
111 d->pic2->irr |= mask;
112
113 isa_interrupt_common(d, old_isa_assert);
114 }
115
116
117 /*
118 * isa_interrupt_deassert():
119 *
120 * Called whenever an ISA device deasserts an interrupt (0..15).
121 */
122 void isa_interrupt_deassert(struct interrupt *interrupt)
123 {
124 struct bus_isa_data *d = interrupt->extra;
125 int line = interrupt->line, mask = 1 << (line & 7);
126 int old_irr1 = d->pic1->irr, old_isa_assert;
127
128 old_isa_assert = old_irr1 & ~d->pic1->ier;
129
130 if (line < 8)
131 d->pic1->irr &= ~mask;
132 else if (d->pic2 != NULL)
133 d->pic2->irr &= ~mask;
134
135 /* If IRQ 0 has been cleared, then this is a timer interrupt.
136 Let's ack it here: */
137 if (old_irr1 & 1 && !(d->pic1->irr & 1) &&
138 d->ptr_to_pending_timer_interrupts != NULL &&
139 (*d->ptr_to_pending_timer_interrupts) > 0)
140 (*d->ptr_to_pending_timer_interrupts) --;
141
142 isa_interrupt_common(d, old_isa_assert);
143 }
144
145
146 /*
147 * bus_isa_init():
148 *
149 * Flags are zero or more of the following, ORed together:
150 *
151 * BUS_ISA_EXTERNAL_PIC Don't register/use isa_interrupt_*().
152 * BUS_ISA_IDE0 Include wdc0.
153 * BUS_ISA_IDE1 Include wdc1.
154 * BUS_ISA_FDC Include a floppy controller. (Dummy.)
155 * BUS_ISA_VGA Include old-style (non-PCI) VGA. (*1)
156 * BUS_ISA_VGA_FORCE Include VGA even when running without X11. (*2)
157 * BUS_ISA_PCKBC_FORCE_USE Always assume keyboard console, not serial. (*3)
158 * BUS_ISA_PCKBC_NONPCSTYLE Don't set the pc-style flag for the keyboard.
159 * BUS_ISA_NO_SECOND_PIC Only useful for 8086 XT (pre-AT) emulation. :-)
160 * BUS_ISA_LPTBASE_3BC Set lptbase to 0x3bc instead of 0x378.
161 *
162 * (*1) For machines with a PCI bus, this flag should not be used. Instead, a
163 * PCI VGA card should be added to the PCI bus.
164 *
165 * (*2) For machines where it is easy to select VGA vs serial console during
166 * boot, this flag should not be used. Machines that "always" boot up
167 * in VGA console mode should have it set.
168 *
169 * (*3) Similar to *2 above; machines that always boot up with VGA console
170 * should have this flag set, so that the keyboard is always used.
171 *
172 * The interrupt_base_path is the name of the bus, CPU, or controller onto
173 * which this ISA bus will be attached, e.g. "emul[0].machine[0].lca" or
174 * "emul[0].machine[0].cpu[0].pic1".
175 */
176 struct bus_isa_data *bus_isa_init(struct machine *machine,
177 char *interrupt_base_path, uint32_t bus_isa_flags,
178 uint64_t isa_portbase, uint64_t isa_membase)
179 {
180 struct bus_isa_data *d;
181 char tmpstr[300], tmpstr2[300];
182 int wdc0_irq = 14, wdc1_irq = 15;
183 int i, tmp_handle, kbd_in_use;
184 int lptbase = 0x378;
185
186 CHECK_ALLOCATION(d = malloc(sizeof(struct bus_isa_data)));
187 memset(d, 0, sizeof(struct bus_isa_data));
188
189 d->isa_portbase = isa_portbase;
190 d->isa_membase = isa_membase;
191
192 if (!(bus_isa_flags & BUS_ISA_EXTERNAL_PIC)) {
193 /* Connect to the interrupt which we're interrupting
194 at (usually a CPU): */
195 INTERRUPT_CONNECT(interrupt_base_path, d->irq);
196
197 /* Register the 16 possible ISA interrupts: */
198 for (i=0; i<16; i++) {
199 struct interrupt template;
200 char name[300];
201 snprintf(name, sizeof(name),
202 "%s.isa.%i", interrupt_base_path, i);
203 memset(&template, 0, sizeof(template));
204 template.line = i;
205 template.name = name;
206 template.extra = d;
207 template.interrupt_assert = isa_interrupt_assert;
208 template.interrupt_deassert = isa_interrupt_deassert;
209 interrupt_handler_register(&template);
210 }
211 }
212
213 kbd_in_use = ((bus_isa_flags & BUS_ISA_PCKBC_FORCE_USE) ||
214 (machine->x11_md.in_use))? 1 : 0;
215
216 if (machine->machine_type == MACHINE_PREP) {
217 /* PReP with obio controller has both WDCs on irq 13! */
218 wdc0_irq = wdc1_irq = 13;
219 }
220
221 if (!(bus_isa_flags & BUS_ISA_EXTERNAL_PIC)) {
222 snprintf(tmpstr, sizeof(tmpstr), "8259 irq=%s addr=0x%llx",
223 interrupt_base_path, (long long)(isa_portbase + 0x20));
224 d->pic1 = machine->isa_pic_data.pic1 =
225 device_add(machine, tmpstr);
226 d->ptr_to_pending_timer_interrupts =
227 machine->isa_pic_data.pending_timer_interrupts;
228 d->ptr_to_last_int = &machine->isa_pic_data.last_int;
229
230 if (bus_isa_flags & BUS_ISA_NO_SECOND_PIC)
231 bus_isa_flags &= ~BUS_ISA_NO_SECOND_PIC;
232 else {
233 snprintf(tmpstr, sizeof(tmpstr),
234 "8259 irq=%s.isa.2 addr=0x%llx",
235 interrupt_base_path,(long long)(isa_portbase+0xa0));
236 d->pic2 = machine->isa_pic_data.pic2 =
237 device_add(machine, tmpstr);
238 }
239 } else {
240 bus_isa_flags &= ~BUS_ISA_EXTERNAL_PIC;
241 }
242
243 snprintf(tmpstr, sizeof(tmpstr), "8253 irq=%s.isa.%i addr=0x%llx "
244 "in_use=0", interrupt_base_path, 0,
245 (long long)(isa_portbase + 0x40));
246 device_add(machine, tmpstr);
247
248 snprintf(tmpstr, sizeof(tmpstr), "pccmos irq=%s.isa.%i addr=0x%llx",
249 interrupt_base_path, 8, (long long)(isa_portbase + 0x70));
250 device_add(machine, tmpstr);
251
252 snprintf(tmpstr, sizeof(tmpstr), "ns16550 irq=%s.isa.%i addr=0x%llx "
253 "name2=tty0 in_use=%i", interrupt_base_path, 4,
254 (long long)(isa_portbase + 0x3f8), 1 - kbd_in_use);
255 machine->main_console_handle = (size_t)device_add(machine, tmpstr);
256
257 snprintf(tmpstr, sizeof(tmpstr), "ns16550 irq=%s.isa.%i addr=0x%llx "
258 "name2=tty1 in_use=0", interrupt_base_path, 3,
259 (long long)(isa_portbase + 0x2f8));
260 device_add(machine, tmpstr);
261
262 if (bus_isa_flags & BUS_ISA_LPTBASE_3BC) {
263 bus_isa_flags &= ~BUS_ISA_LPTBASE_3BC;
264 lptbase = 0x3bc;
265 }
266
267 snprintf(tmpstr, sizeof(tmpstr), "lpt irq=%s.isa.%i addr=0x%llx "
268 "name2=lpt in_use=0", interrupt_base_path, 7,
269 (long long)(isa_portbase + lptbase));
270 device_add(machine, tmpstr);
271
272 if (bus_isa_flags & BUS_ISA_IDE0) {
273 bus_isa_flags &= ~BUS_ISA_IDE0;
274 snprintf(tmpstr, sizeof(tmpstr), "wdc irq=%s.isa.%i "
275 "addr=0x%llx", interrupt_base_path, wdc0_irq,
276 (long long)(isa_portbase + 0x1f0));
277 if (diskimage_exist(machine, 0, DISKIMAGE_IDE) ||
278 diskimage_exist(machine, 1, DISKIMAGE_IDE))
279 device_add(machine, tmpstr);
280 }
281
282 if (bus_isa_flags & BUS_ISA_IDE1) {
283 bus_isa_flags &= ~BUS_ISA_IDE1;
284 snprintf(tmpstr, sizeof(tmpstr), "wdc irq=%s.isa.%i "
285 "addr=0x%llx", interrupt_base_path, wdc1_irq,
286 (long long)(isa_portbase + 0x170));
287 if (diskimage_exist(machine, 2, DISKIMAGE_IDE) ||
288 diskimage_exist(machine, 3, DISKIMAGE_IDE))
289 device_add(machine, tmpstr);
290 }
291
292 if (bus_isa_flags & BUS_ISA_FDC) {
293 bus_isa_flags &= ~BUS_ISA_FDC;
294 snprintf(tmpstr, sizeof(tmpstr), "fdc irq=%s.isa.%i "
295 "addr=0x%llx", interrupt_base_path, 6,
296 (long long)(isa_portbase + 0x3f0));
297 device_add(machine, tmpstr);
298 }
299
300 if (bus_isa_flags & BUS_ISA_VGA) {
301 if (machine->x11_md.in_use || bus_isa_flags & BUS_ISA_VGA_FORCE)
302 dev_vga_init(machine, machine->memory,
303 isa_membase + 0xa0000, isa_portbase + 0x3c0,
304 machine->machine_name);
305 bus_isa_flags &= ~(BUS_ISA_VGA | BUS_ISA_VGA_FORCE);
306 }
307
308 snprintf(tmpstr, sizeof(tmpstr), "%s.isa.1", interrupt_base_path);
309 snprintf(tmpstr2, sizeof(tmpstr2), "%s.isa.12", interrupt_base_path);
310 tmp_handle = dev_pckbc_init(machine, machine->memory,
311 isa_portbase + 0x60, PCKBC_8042, tmpstr, tmpstr2,
312 kbd_in_use, bus_isa_flags & BUS_ISA_PCKBC_NONPCSTYLE? 0 : 1);
313
314 if (kbd_in_use)
315 machine->main_console_handle = tmp_handle;
316
317 bus_isa_flags &= ~(BUS_ISA_PCKBC_NONPCSTYLE | BUS_ISA_PCKBC_FORCE_USE);
318
319 if (bus_isa_flags != 0)
320 fatal("WARNING! bus_isa(): unimplemented bus_isa_flags 0x%x\n",
321 bus_isa_flags);
322
323 return d;
324 }
325
  ViewVC Help
Powered by ViewVC 1.1.26