/[gxemul]/trunk/src/devices/dev_dec21030.c
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Annotation of /trunk/src/devices/dev_dec21030.c

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Revision 20 - (hide annotations)
Mon Oct 8 16:19:23 2007 UTC (16 years, 7 months ago) by dpavlin
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File size: 7715 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1055 2005/11/25 22:48:36 debug Exp $
20051031	Adding disassembly support for more ARM instructions (clz,
		smul* etc), and adding a hack to support "new tiny" pages
		for StrongARM.
20051101	Minor documentation updates (NetBSD 2.0.2 -> 2.1, and OpenBSD
		3.7 -> 3.8, and lots of testing).
		Changing from 1-sector PIO mode 0 transfers to 128-sector PIO
		mode 3 (in dev_wdc).
		Various minor ARM dyntrans updates (pc-relative loads from
		within the same page as the instruction are now treated as
		constant "mov").
20051102	Re-enabling instruction combinations (they were accidentally
		disabled).
		Dyntrans TLB entries are now overwritten using a round-robin
		scheme instead of randomly. This increases performance.
		Fixing a typo in file.c (thanks to Chuan-Hua Chang for
		noticing it).
		Experimenting with adding ATAPI support to dev_wdc (to make
		emulated *BSD detect cdroms as cdroms, not harddisks).
20051104	Various minor updates.
20051105	Continuing on the ATAPI emulation. Seems to work well enough
		for a NetBSD/cats installation, but not OpenBSD/cats.
		Various other updates.
20051106	Modifying the -Y command line option to allow scaleup with
		certain graphic controllers (only dev_vga so far), not just
		scaledown.
		Some minor dyntrans cleanups.
20051107	Beginning a cleanup up the PCI subsystem (removing the
		read_register hack, etc).
20051108	Continuing the cleanup; splitting up some pci devices into a
		normal autodev device and some separate pci glue code.
20051109	Continuing on the PCI bus stuff; all old pci_*.c have been
		incorporated into normal devices and/or rewritten as glue code
		only, adding a dummy Intel 82371AB PIIX4 for Malta (not really
		tested yet).
		Minor pckbc fix so that Linux doesn't complain.
		Working on the DEC 21143 NIC (ethernet mac rom stuff mostly).
		Various other minor fixes.
20051110	Some more ARM dyntrans fine-tuning (e.g. some instruction
		combinations (cmps followed by conditional branch within the
		same page) and special cases for DPIs with regform when the
		shifter isn't used).
20051111	ARM dyntrans updates: O(n)->O(1) for just-mark-as-non-
		writable in the generic pc_to_pointers function, and some other
		minor hacks.
		Merging Cobalt and evbmips (Malta) ISA interrupt handling,
		and some minor fixes to allow Linux to accept harddisk irqs.
20051112	Minor device updates (pckbc, dec21143, lpt, ...), most
		importantly fixing the ALI M1543/M5229 so that harddisk irqs
		work with Linux/CATS.
20051113	Some more generalizations of the PCI subsystem.
		Finally took the time to add a hack for SCSI CDROM TOCs; this
		enables OpenBSD to use partition 'a' (as needed by the OpenBSD
		installer), and Windows NT's installer to get a bit further.
		Also fixing dev_wdc to allow Linux to detect ATAPI CDROMs.
		Continuing on the DEC 21143.
20051114	Minor ARM dyntrans tweaks; ARM cmps+branch optimization when
		comparing with 0, and generalizing the xchg instr. comb.
		Adding disassembly of ARM mrrc/mcrr and q{,d}{add,sub}.
20051115	Continuing on various PPC things (BATs, other address trans-
		lation things, various loads/stores, BeBox emulation, etc.).
		Beginning to work on PPC interrupt/exception support.
20051116	Factoring out some code which initializes legacy ISA devices
		from those machines that use them (bus_isa).
		Continuing on PPC interrupt/exception support.
20051117	Minor Malta fixes: RTC year offset = 80, disabling a speed hack
		which caused NetBSD to detect a too fast cpu, and adding a new
		hack to make Linux detect a faster cpu.
		Continuing on the Artesyn PM/PPC emulation mode.
		Adding an Algor emulation skeleton (P4032 and P5064);
		implementing some of the basics.
		Continuing on PPC emulation in general; usage of unimplemented
		SPRs is now easier to track, continuing on memory/exception
		related issues, etc.
20051118	More work on PPC emulation (tgpr0..3, exception handling,
		memory stuff, syscalls, etc.).
20051119	Changing the ARM dyntrans code to mostly use cpu->pc, and not
		necessarily use arm reg 15. Seems to work.
		Various PPC updates; continuing on the PReP emulation mode.
20051120	Adding a workaround/hack to dev_mc146818 to allow NetBSD/prep
		to detect the clock.
20051121	More cleanup of the PCI bus (memory and I/O bases, etc).
		Continuing on various PPC things (decrementer and timebase,
		WDCs on obio (on PReP) use irq 13, not 14/15).
20051122	Continuing on the CPC700 controller (interrupts etc) for PMPPC,
		and on PPC stuff in general.
		Finally! After some bug fixes to the virtual to physical addr
		translation, NetBSD/{prep,pmppc} 2.1 reach userland and are
		stable enough to be interacted with.
		More PCI updates; reverse-endian device access for PowerPC etc.
20051123	Generalizing the IEEE floating point subsystem (moving it out
		from src/cpus/cpu_mips_coproc.c into a new src/float_emul.c).
		Input via slave xterms was sometimes not really working; fixing
		this for ns16550, and a warning message is now displayed if
		multiple non-xterm consoles are active.
		Adding some PPC floating point support, etc.
		Various interrupt related updates (dev_wdc, _ns16550, _8259,
		and the isa32 common code in machine.c).
		NetBSD/prep can now be installed! :-) (Well, with some manual
		commands necessary before running sysinst.) Updating the
		documentation and various other things to reflect this.
20051124	Various minor documentation updates.
		Continuing the work on the DEC 21143 NIC.
20051125	LOTS of work on the 21143. Both OpenBSD and NetBSD work fine
		with it now, except that OpenBSD sometimes gives a time-out
		warning.
		Minor documentation updates.

==============  RELEASE 0.3.7  ==============
1 dpavlin 20 /*
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_dec21030.c,v 1.2 2005/11/13 00:14:08 debug Exp $
29     *
30     * DEC 21030 "tga" graphics.
31     *
32     * Resolutions that seem to be possible: 640x480, 1024x768, 1280x1024.
33     * 8 bits, perhaps others? (24 bit?)
34     *
35     * NetBSD should say something like this:
36     *
37     * tga0 at pci0 dev 12 function 0: TGA2 pass 2, board type T8-02
38     * tga0: 1280 x 1024, 8bpp, Bt485 RAMDAC
39     *
40     * See netbsd/src/sys/dev/pci/tga.c for more info.
41     * tga_rop_vtov() for video-to-video copy (scrolling and fast
42     * erasing)
43     *
44     * TODO: This device is far from complete.
45     * The RAMDAC is non-existant.
46     *
47     * TODO: all fb device writes with direct writes to the framebuffer
48     * memory, and update the x1,y1,x2,y2 coordinates instead.
49     * That will give better performance.
50     */
51    
52     #include <stdio.h>
53     #include <stdlib.h>
54     #include <string.h>
55    
56     #include "device.h"
57     #include "devices.h"
58     #include "machine.h"
59     #include "memory.h"
60     #include "misc.h"
61    
62     #include "tgareg.h"
63    
64     #define MAX_XSIZE 2048
65    
66     #if 1
67     int dec21030_default_xsize = 640;
68     int dec21030_default_ysize = 480;
69     #else
70     int dec21030_default_xsize = 1024;
71     int dec21030_default_ysize = 768;
72     #endif
73    
74    
75     /* TODO: Ugly hack: this causes the framebuffer to be in memory */
76     #define FRAMEBUFFER_PADDR 0x4000000000ULL
77     #define FRAMEBUFFER_BASE 0x201000
78    
79    
80     struct dec21030_data {
81     int graphics_mode;
82     uint32_t pixel_mask;
83     uint32_t copy_source;
84     uint32_t color;
85     struct vfb_data *vfb_data;
86     };
87    
88    
89     /*
90     * dev_dec21030_access():
91     */
92     int dev_dec21030_access(struct cpu *cpu, struct memory *mem,
93     uint64_t relative_addr, unsigned char *data, size_t len,
94     int writeflag, void *extra)
95     {
96     struct dec21030_data *d = extra;
97     uint64_t idata, odata = 0;
98     int reg, r, i, white = 255, black = 0;
99     int newlen;
100     unsigned char buf2[MAX_XSIZE];
101    
102     /* Read/write to the framebuffer: */
103     if (relative_addr >= FRAMEBUFFER_BASE) {
104     /* TODO: Perhaps this isn't graphics mode (GMOR),
105     but GOPR (operation) specific: */
106    
107     switch (d->graphics_mode) {
108     case 1: /* Bitmap write: */
109     /* Copy from data into buf2: */
110     for (i=0; i<len; i++) {
111     buf2[i*8 + 0] = data[i]&1? white : black;
112     buf2[i*8 + 1] = data[i]&2? white : black;
113     buf2[i*8 + 2] = data[i]&4? white : black;
114     buf2[i*8 + 3] = data[i]&8? white : black;
115     buf2[i*8 + 4] = data[i]&16? white : black;
116     buf2[i*8 + 5] = data[i]&32? white : black;
117     buf2[i*8 + 6] = data[i]&64? white : black;
118     buf2[i*8 + 7] = data[i]&128? white : black;
119     }
120    
121     newlen = 0;
122     for (i=0; i<32; i++)
123     if (d->pixel_mask & (1 << i))
124     newlen ++;
125    
126     if (newlen > len * 8)
127     newlen = len * 8;
128    
129     r = dev_fb_access(cpu, mem, relative_addr -
130     FRAMEBUFFER_BASE, buf2, newlen, writeflag,
131     d->vfb_data);
132     break;
133     case 0x2d: /* Block fill: */
134     /* data is nr of pixels to fill minus one */
135     newlen = memory_readmax64(cpu, data, len) + 1;
136     /* debug("YO addr=0x%08x, newlen=%i\n", relative_addr,
137     newlen); */
138     if (newlen > MAX_XSIZE)
139     newlen = MAX_XSIZE;
140     memset(buf2, d->color, newlen);
141     r = dev_fb_access(cpu, mem, relative_addr -
142     FRAMEBUFFER_BASE, buf2, newlen, MEM_WRITE,
143     d->vfb_data);
144     break;
145     default:
146     r = dev_fb_access(cpu, mem, relative_addr -
147     FRAMEBUFFER_BASE, data, len, writeflag,
148     d->vfb_data);
149     }
150     return r;
151     }
152    
153     idata = memory_readmax64(cpu, data, len);
154    
155     /* Read from/write to the dec21030's registers: */
156     reg = ((relative_addr - TGA_MEM_CREGS) & (TGA_CREGS_ALIAS - 1))
157     / sizeof(uint32_t);
158     switch (reg) {
159    
160     /* Color? (there are 8 of these, 2 used in 8-bit mode,
161     8 in 24-bit mode) */
162     case TGA_REG_GBCR0:
163     if (writeflag == MEM_WRITE)
164     d->color = idata;
165     else
166     odata = d->color;
167     break;
168    
169     /* Board revision */
170     /* case TGA_MEM_CREGS + sizeof(uint32_t) * TGA_REG_GREV: */
171     case TGA_REG_GREV:
172     /* 01,02,03,04 (rev0) and 20,21,22 (rev1) are allowed */
173     odata = 0x04;
174     break;
175    
176     /* Graphics Mode: */
177     case TGA_REG_GMOR:
178     if (writeflag == MEM_WRITE)
179     d->graphics_mode = idata;
180     else
181     odata = d->graphics_mode;
182     break;
183    
184     /* Pixel mask: */
185     case TGA_REG_GPXR_S: /* "one-shot" */
186     case TGA_REG_GPXR_P: /* persistant */
187     if (writeflag == MEM_WRITE)
188     d->pixel_mask = idata;
189     else
190     odata = d->pixel_mask;
191     break;
192    
193     /* Horizonsal size: */
194     case TGA_REG_VHCR:
195     odata = dec21030_default_xsize / 4; /* lowest 9 bits */
196     break;
197    
198     /* Vertical size: */
199     case TGA_REG_VVCR:
200     odata = dec21030_default_ysize; /* lowest 11 bits */
201     break;
202    
203     /* Block copy source: */
204     case TGA_REG_GCSR:
205     d->copy_source = idata;
206     debug("[ dec21030: block copy source = 0x%08x ]\n", idata);
207     break;
208    
209     /* Block copy destination: */
210     case TGA_REG_GCDR:
211     debug("[ dec21030: block copy destination = 0x%08x ]\n", idata);
212     newlen = 64;
213     /* Both source and destination are raw framebuffer addresses,
214     offset by 0x1000. */
215     dev_fb_access(cpu, mem, d->copy_source - 0x1000,
216     buf2, newlen, MEM_READ, d->vfb_data);
217     dev_fb_access(cpu, mem, idata - 0x1000,
218     buf2, newlen, MEM_WRITE, d->vfb_data);
219     break;
220    
221     default:
222     if (writeflag == MEM_WRITE)
223     debug("[ dec21030: unimplemented write to address"
224     " 0x%x (=reg 0x%x), data=0x%02x ]\n",
225     (int)relative_addr, reg, (int)idata);
226     else
227     debug("[ dec21030: unimplemented read from address"
228     " 0x%x (=reg 0x%x) ]\n", (int)relative_addr, reg);
229     }
230    
231     if (writeflag == MEM_READ)
232     memory_writemax64(cpu, data, len, odata);
233    
234     return 1;
235     }
236    
237    
238     /*
239     * devinit_dec21030():
240     */
241     int devinit_dec21030(struct devinit *devinit)
242     {
243     struct dec21030_data *d;
244    
245     d = malloc(sizeof(struct dec21030_data));
246     if (d == NULL) {
247     fprintf(stderr, "out of memory\n");
248     exit(1);
249     }
250     memset(d, 0, sizeof(struct dec21030_data));
251    
252     memory_device_register(devinit->machine->memory, devinit->name,
253     devinit->addr, 128*1048576, dev_dec21030_access, d,
254     DM_DEFAULT, NULL);
255    
256     /*
257     * TODO: I have no idea about how/where this framebuffer should
258     * be in relation to the pci device
259     */
260     d->vfb_data = dev_fb_init(devinit->machine, devinit->machine->memory,
261     FRAMEBUFFER_PADDR, VFB_GENERIC,
262     dec21030_default_xsize, dec21030_default_ysize,
263     dec21030_default_xsize, dec21030_default_ysize, 8, "TGA");
264    
265     return 1;
266     }
267    
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