1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* $OpenBSD: irongate_dma.c,v 1.5 2008/06/26 05:42:08 ray Exp $ */
/* $NetBSD: irongate_dma.c,v 1.3 2000/06/29 08:58:47 mrg Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* DMA support for the AMD 751 (``Irongate'') core logic chipset.
*
* The AMD 751 is really unlike all of the other Alpha PCI core logic
* chipsets. Instead, it looks like a normal PC chipset (not surprising,
* since it is used for Athlon processors).
*
* Because of this, it lacks all of the SGMAP hardware normally present
* on an Alpha system, and there are no DMA windows. Instead, a memory
* bus address is a PCI DMA address, and ISA DMA above 16M has to be
* bounced (this is not unlike the Jensen, actually).
*/
/*
* XXX - We should define this before including bus.h, but since other stuff
* pulls in bus.h we must do this here.
*/
#define _ALPHA_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/irongatereg.h>
#include <alpha/pci/irongatevar.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include "isadma.h"
bus_dma_tag_t irongate_dma_get_tag(bus_dma_tag_t, alpha_bus_t);
void
irongate_dma_init(struct irongate_config *icp)
{
bus_dma_tag_t t;
/*
* Initialize the DMA tag used for PCI DMA.
*/
t = &icp->ic_dmat_pci;
t->_cookie = icp;
t->_wbase = 0;
t->_wsize = 0x100000000UL;
t->_next_window = NULL;
t->_boundary = 0;
t->_sgmap = NULL;
t->_get_tag = irongate_dma_get_tag;
t->_dmamap_create = _bus_dmamap_create;
t->_dmamap_destroy = _bus_dmamap_destroy;
t->_dmamap_load = _bus_dmamap_load_direct;
t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct;
t->_dmamap_load_uio = _bus_dmamap_load_uio_direct;
t->_dmamap_load_raw = _bus_dmamap_load_raw_direct;
t->_dmamap_unload = _bus_dmamap_unload;
t->_dmamap_sync = _bus_dmamap_sync;
t->_dmamem_alloc = _bus_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
#if NISADMA > 0
/*
* Initialize the DMA tag used for ISA DMA.
*/
t = &icp->ic_dmat_isa;
t->_cookie = icp;
t->_wbase = 0;
t->_wsize = 0x1000000;
t->_next_window = NULL;
t->_boundary = 0;
t->_sgmap = NULL;
t->_get_tag = irongate_dma_get_tag;
t->_dmamap_create = isadma_bounce_dmamap_create;
t->_dmamap_destroy = isadma_bounce_dmamap_destroy;
t->_dmamap_load = isadma_bounce_dmamap_load;
t->_dmamap_load_mbuf = isadma_bounce_dmamap_load_mbuf;
t->_dmamap_load_uio = isadma_bounce_dmamap_load_uio;
t->_dmamap_load_raw = isadma_bounce_dmamap_load_raw;
t->_dmamap_unload = isadma_bounce_dmamap_unload;
t->_dmamap_sync = isadma_bounce_dmamap_sync;
t->_dmamem_alloc = isadma_bounce_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
#endif
/* XXX XXX BEGIN XXX XXX */
{ /* XXX */
extern paddr_t alpha_XXX_dmamap_or; /* XXX */
alpha_XXX_dmamap_or = 0; /* XXX */
} /* XXX */
/* XXX XXX END XXX XXX */
}
/*
* Return the bus dma tag to be used for the specified bus type.
* INTERNAL USE ONLY!
*/
bus_dma_tag_t
irongate_dma_get_tag(bus_dma_tag_t t, alpha_bus_t bustype)
{
struct irongate_config *icp = t->_cookie;
switch (bustype) {
case ALPHA_BUS_PCI:
case ALPHA_BUS_EISA:
/*
* Busses capable of 32-bit DMA get the PCI DMA tag.
*/
return (&icp->ic_dmat_pci);
case ALPHA_BUS_ISA:
/*
* Lame 24-bit busses have to bounce.
*/
return (&icp->ic_dmat_isa);
default:
panic("irongate_dma_get_tag: shouldn't be here, really...");
}
}
|
