/[gxemul]/trunk/src/include/jazz_r4030_dma.h
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/src/include/jazz_r4030_dma.h

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Revision 6 - (show annotations)
Mon Oct 8 16:18:11 2007 UTC (16 years, 5 months ago) by dpavlin
File MIME type: text/plain
File size: 5368 byte(s)
++ 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 /* gxemul: $Id: jazz_r4030_dma.h,v 1.4 2005/06/02 12:31:40 debug Exp $ */
2 /* $NetBSD: dma.h,v 1.2 2001/07/24 16:26:53 tsutsui Exp $ */
3 /* $OpenBSD: dma.h,v 1.3 1997/04/19 17:19:51 pefo Exp $ */
4
5 #ifndef __JAZZ_R4030_DMA
6 #define __JAZZ_R4030_DMA
7
8 #ifndef GXEMUL
9 #define GXEMUL
10 #endif
11
12 /*
13 * Copyright (c) 1996 Per Fogelstrom
14 * All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. All advertising materials mentioning features or use of this software
25 * must display the following acknowledgement:
26 * This product includes software developed by Per Fogelstrom.
27 * 4. The name of the author may not be used to endorse or promote products
28 * derived from this software without specific prior written permission
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42 /*
43 * Hardware dma registers.
44 */
45 typedef volatile struct {
46 int32_t dma_mode;
47 int32_t pad1;
48 int32_t dma_enab;
49 int32_t pad2;
50 int32_t dma_count;
51 int32_t pad3;
52 int32_t dma_addr;
53 int32_t pad4;
54 } DmaReg, *pDmaReg;
55
56 #define R4030_DMA_MODE_40NS 0x00 /* Device dma timing */
57 #define R4030_DMA_MODE_80NS 0x01 /* Device dma timing */
58 #define R4030_DMA_MODE_120NS 0x02 /* Device dma timing */
59 #define R4030_DMA_MODE_160NS 0x03 /* Device dma timing */
60 #define R4030_DMA_MODE_200NS 0x04 /* Device dma timing */
61 #define R4030_DMA_MODE_240NS 0x05 /* Device dma timing */
62 #define R4030_DMA_MODE_280NS 0x06 /* Device dma timing */
63 #define R4030_DMA_MODE_320NS 0x07 /* Device dma timing */
64 #define R4030_DMA_MODE_8 0x08 /* Device 8 bit */
65 #define R4030_DMA_MODE_16 0x10 /* Device 16 bit */
66 #define R4030_DMA_MODE_32 0x18 /* Device 32 bit */
67 #define R4030_DMA_MODE_INT 0x20 /* Interrupt when done */
68 #define R4030_DMA_MODE_BURST 0x40 /* Burst mode (Rev 2 only) */
69 #define R4030_DMA_MODE_FAST 0x80 /* Fast dma cycle (Rev 2 only) */
70 #define R4030_DMA_MODE 0xff /* Mode register bits */
71 #define DMA_DIR_WRITE 0x100 /* Software direction status */
72 #define DMA_DIR_READ 0x000 /* Software direction status */
73
74 #define R4030_DMA_ENAB_RUN 0x01 /* Enable dma */
75 #define R4030_DMA_ENAB_READ 0x00 /* Read from device */
76 #define R4030_DMA_ENAB_WRITE 0x02 /* Write to device */
77 #define R4030_DMA_ENAB_TC_IE 0x100 /* Terminal count int enable */
78 #define R4030_DMA_ENAB_ME_IE 0x200 /* Memory error int enable */
79 #define R4030_DMA_ENAB_TL_IE 0x400 /* Translation limit int enable */
80
81 #define R4030_DMA_COUNT_MASK 0x000fffff /* Byte count mask */
82
83 /*
84 * Structure used to control dma.
85 */
86
87 #ifndef GXEMUL
88 typedef struct dma_softc {
89 struct device sc_dev; /* use as a device */
90 struct esp_softc *sc_esp;
91 bus_addr_t dma_va; /* Viritual address for transfer */
92 int mode; /* Mode register value and direction */
93 jazz_dma_pte_t *pte_base; /* Pointer to dma tlb array */
94 int pte_size; /* Size of pte allocated pte array */
95 pDmaReg dma_reg; /* Pointer to dma registers */
96 int sc_active; /* Active flag */
97 void (*reset)(struct dma_softc *); /* Reset routine pointer */
98 void (*enintr)(struct dma_softc *); /* Int enab routine pointer */
99 void (*map)(struct dma_softc *, char *, size_t, int);
100 /* Map a dma viritual area */
101 void (*start)(struct dma_softc *, caddr_t, size_t, int);
102 /* Start routine pointer */
103 int (*isintr)(struct dma_softc *); /* Int check routine pointer */
104 int (*intr)(struct dma_softc *); /* Interrupt routine pointer */
105 void (*end)(struct dma_softc *); /* Interrupt routine pointer */
106 } dma_softc_t;
107 #endif /* not in gxemul */
108
109 #define DMA_TO_DEV 0
110 #define DMA_FROM_DEV 1
111
112 #define DMA_RESET(r) ((r->reset)(r))
113 #define DMA_START(a, b, c, d) ((a->start)(a, b, c, d))
114 #define DMA_MAP(a, b, c, d) ((a->map)(a, b, c, d))
115 #define DMA_INTR(r) ((r->intr)(r))
116 #define DMA_DRAIN(r)
117 #define DMA_END(r) ((r->end)(r))
118
119 #ifndef GXEMUL
120 void picaDmaInit __P((void));
121 void picaDmaTLBAlloc __P((dma_softc_t *));
122 void picaDmaTLBFree __P((dma_softc_t *));
123 void picaDmaMap __P((struct dma_softc *, char *, size_t, int));
124 void picaDmaStart __P((struct dma_softc *, char *, size_t, int));
125 void picaDmaFlush __P((struct dma_softc *, char *, size_t, int));
126 void asc_dma_init __P((struct dma_softc *));
127 void fdc_dma_init __P((struct dma_softc *));
128 #endif /* not in gxemul */
129
130 #endif /* __JAZZ_R4030_DMA */

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