/[gxemul]/trunk/src/devices/dev_zs.c
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Annotation of /trunk/src/devices/dev_zs.c

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Revision 4 - (hide annotations)
Mon Oct 8 16:18:00 2007 UTC (16 years, 6 months ago) by dpavlin
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File size: 6120 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.707 2005/04/27 16:37:33 debug Exp $
20050408	Some minor updates to the wdc. Linux now doesn't complain
		anymore if a disk is non-present.
20050409	Various minor fixes (a bintrans bug, and some other things).
		The wdc seems to work with Playstation2 emulation, but there
		is a _long_ annoying delay when disks are detected.
		Fixing a really important bintrans bug (when devices and RAM
		are mixed within 4KB pages), which was triggered with
		NetBSD/playstation2 kernels.
20050410	Adding a dummy dev_ps2_ether (just so that NetBSD doesn't
		complain as much during bootup).
		Symbols starting with '$' are now ignored.
		Renaming dev_ps2_ohci.c to dev_ohci.c, etc.
20050411	Moving the bintrans-cache-isolation check from cpu_mips.c to
		cpu_mips_coproc.c. (I thought this would give a speedup, but
		it's not noticable.)
		Better playstation2 sbus interrupt code.
		Skip ahead many ticks if the count register is read manually.
		(This increases the speed of delay-loops that simply read
		the count register.)
20050412	Updates to the playstation2 timer/interrupt code.
		Some other minor updates.
20050413	NetBSD/cobalt runs from a disk image :-) including userland;
		updating the documentation on how to install NetBSD/cobalt
		using NetBSD/pmax (!).
		Some minor bintrans updates (no real speed improvement) and
		other minor updates (playstation2 now uses the -o options).
20050414	Adding a dummy x86 (and AMD64) mode.
20050415	Adding some (32-bit and 16-bit) x86 instructions.
		Adding some initial support for non-SCSI, non-IDE floppy
		images. (The x86 mode can boot from these, more or less.)
		Moving the devices/ and include/ directories to src/devices/
		and src/include/, respectively.
20050416	Continuing on the x86 stuff. (Adding pc_bios.c and some simple
		support for software interrupts in 16-bit mode.)
20050417	Ripping out most of the x86 instruction decoding stuff, trying
		to rewrite it in a cleaner way.
		Disabling some of the least working CPU families in the
		configure script (sparc, x86, alpha, hppa), so that they are
		not enabled by default.
20050418	Trying to fix the bug which caused problems when turning on
		and off bintrans interactively, by flushing the bintrans cache
		whenever bintrans is manually (re)enabled.
20050419	Adding the 'lswi' ppc instruction.
		Minor updates to the x86 instruction decoding.
20050420	Renaming x86 register name indices from R_xx to X86_R_xx (this
		makes building on Tru64 nicer).
20050422	Adding a check for duplicate MIPS TLB entries on tlbwr/tlbwi.
20050427	Adding screenshots to guestoses.html.
		Some minor fixes and testing for the next release.

==============  RELEASE 0.3.2  ==============
1 dpavlin 4 /*
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_zs.c,v 1.20 2005/02/07 05:51:54 debug Exp $
29     *
30     * Zilog serial controller, used by (at least) the SGI emulation mode.
31     *
32     * TODO: Implement this correctly. The values in here are too
33     * hardcoded, and the controller should be able to handle 2 serial lines.
34     *
35     * Right now it only barely works with NetSBD/sgimips.
36     */
37    
38     #include <stdio.h>
39     #include <stdlib.h>
40     #include <string.h>
41    
42     #include "console.h"
43     #include "cpu.h"
44     #include "devices.h"
45     #include "machine.h"
46     #include "memory.h"
47     #include "misc.h"
48    
49    
50     #define ZS_TICK_SHIFT 14
51    
52     struct zs_data {
53     int irq_nr;
54     int console_handle;
55     int addrmult;
56    
57     int reg_select;
58    
59     int tx_done;
60     };
61    
62    
63     /* From NetBSD: */
64     #define ZSRR0_RX_READY 1
65     #define ZSRR0_TX_READY 4
66    
67    
68     /*
69     * dev_zs_tick():
70     */
71     void dev_zs_tick(struct cpu *cpu, void *extra)
72     {
73     struct zs_data *d = (struct zs_data *) extra;
74    
75     if (console_charavail(d->console_handle) || d->tx_done)
76     cpu_interrupt(cpu, d->irq_nr);
77     else
78     cpu_interrupt_ack(cpu, d->irq_nr);
79     }
80    
81    
82     /*
83     * dev_zs_access():
84     */
85     int dev_zs_access(struct cpu *cpu, struct memory *mem, uint64_t relative_addr,
86     unsigned char *data, size_t len, int writeflag, void *extra)
87     {
88     struct zs_data *d = extra;
89     uint64_t idata = 0, odata = 0;
90     int port_nr;
91    
92     idata = memory_readmax64(cpu, data, len);
93     relative_addr /= d->addrmult;
94    
95     port_nr = relative_addr / 8;
96    
97     /* TODO: The zs controller has 2 ports... */
98     /* relative_addr &= 7; */
99    
100     switch (relative_addr) {
101     case 3:
102     if (writeflag==MEM_READ) {
103     odata = ZSRR0_TX_READY;
104     if (console_charavail(d->console_handle))
105     odata |= ZSRR0_RX_READY;
106     /* debug("[ zs: read from 0x%08lx: 0x%08x ]\n",
107     (long)relative_addr, (int)odata); */
108     } else {
109     /* Hm... TODO */
110     if (d->reg_select == 0) {
111     d->reg_select = idata;
112     } else {
113     switch (d->reg_select) {
114     case 8: console_putchar(d->console_handle,
115     idata & 255);
116     break;
117     default:
118     debug("[ zs: write to (unimplemented)"
119     " register 0x%02x: 0x%08x ]\n",
120     d->reg_select, (int)idata);
121     }
122     d->reg_select = 0;
123     }
124     /* debug("[ zs: write to 0x%08lx: 0x%08x ]\n",
125     (long)relative_addr, (int)idata); */
126     }
127     break;
128     case 7:
129     if (writeflag==MEM_READ) {
130     if (console_charavail(d->console_handle))
131     odata = console_readchar(d->console_handle);
132     else
133     odata = 0;
134     /* debug("[ zs: read from 0x%08lx: 0x%08x ]\n",
135     (long)relative_addr, (int)odata); */
136     } else {
137     /* debug("[ zs: write to 0x%08lx: 0x%08x ]\n",
138     (long)relative_addr, (int)idata); */
139     console_putchar(d->console_handle, idata & 255);
140     d->tx_done = 1;
141     }
142     break;
143    
144     /* hehe, perhaps 0xb and 0xf are the second channel :-) */
145    
146     case 0xb:
147     if (writeflag==MEM_READ) {
148     odata = 0;
149     #if 0
150     /* TODO: Weird. Linux needs 4 here, NetBSD wants 0. */
151     odata = 4;
152     #endif
153     if (d->tx_done)
154     odata |= 2;
155     if (console_charavail(d->console_handle))
156     odata |= 4;
157     d->tx_done = 0;
158     debug("[ zs: read from 0x%08lx: 0x%08x ]\n",
159     (long)relative_addr, (int)odata);
160     } else {
161     debug("[ zs: write to 0x%08lx: 0x%08x ]\n",
162     (long)relative_addr, (int)idata);
163     }
164     break;
165    
166     /* 0xf is used by Linux: */
167     case 0xf:
168     if (writeflag==MEM_READ) {
169     if (console_charavail(d->console_handle))
170     odata = console_readchar(d->console_handle);
171     else
172     odata = 0;
173     /* debug("[ zs: read from 0x%08lx: 0x%08x ]\n",
174     (long)relative_addr, (int)odata); */
175     } else {
176     /* debug("[ zs: write to 0x%08lx: 0x%08x ]\n",
177     (long)relative_addr, (int)idata); */
178     console_putchar(d->console_handle, idata & 255);
179     d->tx_done = 1;
180     }
181     break;
182     default:
183     if (writeflag==MEM_READ) {
184     debug("[ zs: read from 0x%08lx ]\n",
185     (long)relative_addr);
186     } else {
187     debug("[ zs: write to 0x%08lx: 0x%08x ]\n",
188     (long)relative_addr, (int)idata);
189     }
190     }
191    
192     if (writeflag == MEM_READ)
193     memory_writemax64(cpu, data, len, odata);
194    
195     dev_zs_tick(cpu, extra);
196    
197     return 1;
198     }
199    
200    
201     /*
202     * dev_zs_init():
203     */
204     int dev_zs_init(struct machine *machine, struct memory *mem,
205     uint64_t baseaddr, int irq_nr, int addrmult, char *name)
206     {
207     struct zs_data *d;
208    
209     d = malloc(sizeof(struct zs_data));
210     if (d == NULL) {
211     fprintf(stderr, "out of memory\n");
212     exit(1);
213     }
214     memset(d, 0, sizeof(struct zs_data));
215     d->irq_nr = irq_nr;
216     d->addrmult = addrmult;
217     d->console_handle = console_start_slave(machine, name);
218    
219     memory_device_register(mem, "zs", baseaddr, DEV_ZS_LENGTH * addrmult,
220     dev_zs_access, d, MEM_DEFAULT, NULL);
221    
222     machine_add_tickfunction(machine, dev_zs_tick, d, ZS_TICK_SHIFT);
223    
224     return d->console_handle;
225     }
226    
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