/[gxemul]/trunk/src/devices/dev_gt.c
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Contents of /trunk/src/devices/dev_gt.c

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Revision 4 - (show annotations)
Mon Oct 8 16:18:00 2007 UTC (13 years, 1 month ago) by dpavlin
File MIME type: text/plain
File size: 5005 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 /*
2 * Copyright (C) 2003-2005 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_gt.c,v 1.21 2005/03/18 23:20:52 debug Exp $
29 *
30 * The "gt" device used in Cobalt machines.
31 *
32 * TODO: This more or less just a dummy device, so far.
33 */
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "bus_pci.h"
40 #include "cpu.h"
41 #include "devices.h"
42 #include "machine.h"
43 #include "memory.h"
44 #include "misc.h"
45
46
47 #define TICK_STEPS_SHIFT 16
48
49 #define PCI_VENDOR_GALILEO 0x11ab /* Galileo Technology */
50 #define PCI_PRODUCT_GALILEO_GT64011 0x4146 /* GT-64011 System Controller */
51
52 struct gt_data {
53 int reg[8];
54 int irqnr;
55 int pciirq;
56
57 struct pci_data *pci_data;
58 };
59
60
61 /*
62 * dev_gt_tick():
63 */
64 void dev_gt_tick(struct cpu *cpu, void *extra)
65 {
66 struct gt_data *gt_data = extra;
67
68 cpu_interrupt(cpu, gt_data->irqnr);
69 }
70
71
72 /*
73 * dev_gt_access():
74 */
75 int dev_gt_access(struct cpu *cpu, struct memory *mem, uint64_t relative_addr,
76 unsigned char *data, size_t len, int writeflag, void *extra)
77 {
78 uint64_t idata = 0, odata = 0;
79 int i;
80 struct gt_data *d = extra;
81
82 idata = memory_readmax64(cpu, data, len);
83
84 switch (relative_addr) {
85 case 0xc18:
86 if (writeflag == MEM_WRITE) {
87 debug("[ gt write to 0xc18: data = 0x%08lx ]\n",
88 (long)idata);
89 return 1;
90 } else {
91 odata = 0xffffffffULL;
92 /* ??? interrupt something... */
93
94 odata = 0x00000100; /* netbsd/cobalt cobalt/machdep.c:cpu_intr() */
95
96 cpu_interrupt_ack(cpu, d->irqnr);
97
98 debug("[ gt read from 0xc18 (data = 0x%08lx) ]\n",
99 (long)odata);
100 }
101 break;
102 case 0xcf8: /* PCI ADDR */
103 case 0xcfc: /* PCI DATA */
104 if (writeflag == MEM_WRITE) {
105 bus_pci_access(cpu, mem, relative_addr, &idata,
106 writeflag, d->pci_data);
107 } else {
108 bus_pci_access(cpu, mem, relative_addr, &odata,
109 writeflag, d->pci_data);
110 }
111 break;
112 default:
113 if (writeflag==MEM_READ) {
114 debug("[ gt read from addr 0x%x ]\n",
115 (int)relative_addr);
116 odata = d->reg[relative_addr];
117 } else {
118 debug("[ gt write to addr 0x%x:", (int)relative_addr);
119 for (i=0; i<len; i++)
120 debug(" %02x", data[i]);
121 debug(" ]\n");
122 d->reg[relative_addr] = idata;
123 }
124 }
125
126 if (writeflag == MEM_READ)
127 memory_writemax64(cpu, data, len, odata);
128
129 return 1;
130 }
131
132
133 /*
134 * pci_gt_rr():
135 */
136 uint32_t pci_gt_rr(int reg)
137 {
138 switch (reg) {
139 case 0x00:
140 return PCI_VENDOR_GALILEO + (PCI_PRODUCT_GALILEO_GT64011 << 16);
141 case 0x08:
142 return 0x01; /* Revision 1 */
143 default:
144 return 0;
145 }
146 }
147
148
149 /*
150 * pci_gt_init():
151 */
152 void pci_gt_init(struct machine *machine, struct memory *mem)
153 {
154 }
155
156
157 /*
158 * dev_gt_init():
159 *
160 * Initialize a GT device. Return a pointer to the pci_data used, so that
161 * the caller may add PCI devices. First, however, we add the GT device
162 * itself.
163 */
164 struct pci_data *dev_gt_init(struct machine *machine, struct memory *mem,
165 uint64_t baseaddr, int irq_nr, int pciirq)
166 {
167 struct gt_data *d;
168
169 d = malloc(sizeof(struct gt_data));
170 if (d == NULL) {
171 fprintf(stderr, "out of memory\n");
172 exit(1);
173 }
174 memset(d, 0, sizeof(struct gt_data));
175 d->irqnr = irq_nr;
176 d->pciirq = pciirq;
177 d->pci_data = bus_pci_init(pciirq);
178
179 /*
180 * According to NetBSD/cobalt:
181 * pchb0 at pci0 dev 0 function 0: Galileo GT-64011
182 * System Controller, rev 1
183 */
184 bus_pci_add(machine, d->pci_data, mem, 0, 0, 0, pci_gt_init, pci_gt_rr);
185
186 memory_device_register(mem, "gt", baseaddr, DEV_GT_LENGTH,
187 dev_gt_access, d, MEM_DEFAULT, NULL);
188 machine_add_tickfunction(machine, dev_gt_tick, d, TICK_STEPS_SHIFT);
189
190 return d->pci_data;
191 }
192

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