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1 | 27503323 | bellard | /*
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2 | 27503323 | bellard | * QEMU DMA emulation
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3 | 85571bc7 | bellard | *
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4 | 85571bc7 | bellard | * Copyright (c) 2003-2004 Vassili Karpov (malc)
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5 | 85571bc7 | bellard | *
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6 | 27503323 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 27503323 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | 27503323 | bellard | * in the Software without restriction, including without limitation the rights
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9 | 27503323 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 27503323 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | 27503323 | bellard | * furnished to do so, subject to the following conditions:
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12 | 27503323 | bellard | *
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13 | 27503323 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | 27503323 | bellard | * all copies or substantial portions of the Software.
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15 | 27503323 | bellard | *
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16 | 27503323 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 27503323 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 27503323 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 27503323 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 27503323 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 27503323 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 27503323 | bellard | * THE SOFTWARE.
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23 | 27503323 | bellard | */
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24 | 87ecb68b | pbrook | #include "hw.h" |
25 | 87ecb68b | pbrook | #include "isa.h" |
26 | 27503323 | bellard | |
27 | 85571bc7 | bellard | /* #define DEBUG_DMA */
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28 | 7ebb5e41 | bellard | |
29 | 85571bc7 | bellard | #define dolog(...) fprintf (stderr, "dma: " __VA_ARGS__) |
30 | 27503323 | bellard | #ifdef DEBUG_DMA
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31 | 27503323 | bellard | #define lwarn(...) fprintf (stderr, "dma: " __VA_ARGS__) |
32 | 27503323 | bellard | #define linfo(...) fprintf (stderr, "dma: " __VA_ARGS__) |
33 | 27503323 | bellard | #define ldebug(...) fprintf (stderr, "dma: " __VA_ARGS__) |
34 | 27503323 | bellard | #else
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35 | 27503323 | bellard | #define lwarn(...)
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36 | 27503323 | bellard | #define linfo(...)
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37 | 27503323 | bellard | #define ldebug(...)
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38 | 27503323 | bellard | #endif
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39 | 27503323 | bellard | |
40 | 27503323 | bellard | struct dma_regs {
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41 | 27503323 | bellard | int now[2]; |
42 | 27503323 | bellard | uint16_t base[2];
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43 | 27503323 | bellard | uint8_t mode; |
44 | 27503323 | bellard | uint8_t page; |
45 | b0bda528 | bellard | uint8_t pageh; |
46 | 27503323 | bellard | uint8_t dack; |
47 | 27503323 | bellard | uint8_t eop; |
48 | 16f62432 | bellard | DMA_transfer_handler transfer_handler; |
49 | 16f62432 | bellard | void *opaque;
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50 | 27503323 | bellard | }; |
51 | 27503323 | bellard | |
52 | 27503323 | bellard | #define ADDR 0 |
53 | 27503323 | bellard | #define COUNT 1 |
54 | 27503323 | bellard | |
55 | 27503323 | bellard | static struct dma_cont { |
56 | 27503323 | bellard | uint8_t status; |
57 | 27503323 | bellard | uint8_t command; |
58 | 27503323 | bellard | uint8_t mask; |
59 | 27503323 | bellard | uint8_t flip_flop; |
60 | 9eb153f1 | bellard | int dshift;
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61 | 27503323 | bellard | struct dma_regs regs[4]; |
62 | 27503323 | bellard | } dma_controllers[2];
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63 | 27503323 | bellard | |
64 | 27503323 | bellard | enum {
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65 | e875c40a | bellard | CMD_MEMORY_TO_MEMORY = 0x01,
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66 | e875c40a | bellard | CMD_FIXED_ADDRESS = 0x02,
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67 | e875c40a | bellard | CMD_BLOCK_CONTROLLER = 0x04,
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68 | e875c40a | bellard | CMD_COMPRESSED_TIME = 0x08,
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69 | e875c40a | bellard | CMD_CYCLIC_PRIORITY = 0x10,
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70 | e875c40a | bellard | CMD_EXTENDED_WRITE = 0x20,
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71 | e875c40a | bellard | CMD_LOW_DREQ = 0x40,
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72 | e875c40a | bellard | CMD_LOW_DACK = 0x80,
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73 | e875c40a | bellard | CMD_NOT_SUPPORTED = CMD_MEMORY_TO_MEMORY | CMD_FIXED_ADDRESS |
74 | e875c40a | bellard | | CMD_COMPRESSED_TIME | CMD_CYCLIC_PRIORITY | CMD_EXTENDED_WRITE |
75 | e875c40a | bellard | | CMD_LOW_DREQ | CMD_LOW_DACK |
76 | 27503323 | bellard | |
77 | 27503323 | bellard | }; |
78 | 27503323 | bellard | |
79 | 492c30af | aliguori | static void DMA_run (void); |
80 | 492c30af | aliguori | |
81 | 9eb153f1 | bellard | static int channels[8] = {-1, 2, 3, 1, -1, -1, -1, 0}; |
82 | 9eb153f1 | bellard | |
83 | 7d977de7 | bellard | static void write_page (void *opaque, uint32_t nport, uint32_t data) |
84 | 27503323 | bellard | { |
85 | 9eb153f1 | bellard | struct dma_cont *d = opaque;
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86 | 27503323 | bellard | int ichan;
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87 | 27503323 | bellard | |
88 | 9eb153f1 | bellard | ichan = channels[nport & 7];
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89 | 27503323 | bellard | if (-1 == ichan) { |
90 | 85571bc7 | bellard | dolog ("invalid channel %#x %#x\n", nport, data);
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91 | 27503323 | bellard | return;
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92 | 27503323 | bellard | } |
93 | 9eb153f1 | bellard | d->regs[ichan].page = data; |
94 | 9eb153f1 | bellard | } |
95 | 9eb153f1 | bellard | |
96 | b0bda528 | bellard | static void write_pageh (void *opaque, uint32_t nport, uint32_t data) |
97 | 9eb153f1 | bellard | { |
98 | 9eb153f1 | bellard | struct dma_cont *d = opaque;
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99 | 9eb153f1 | bellard | int ichan;
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100 | 27503323 | bellard | |
101 | 9eb153f1 | bellard | ichan = channels[nport & 7];
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102 | b0bda528 | bellard | if (-1 == ichan) { |
103 | 85571bc7 | bellard | dolog ("invalid channel %#x %#x\n", nport, data);
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104 | b0bda528 | bellard | return;
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105 | b0bda528 | bellard | } |
106 | b0bda528 | bellard | d->regs[ichan].pageh = data; |
107 | b0bda528 | bellard | } |
108 | 9eb153f1 | bellard | |
109 | b0bda528 | bellard | static uint32_t read_page (void *opaque, uint32_t nport) |
110 | b0bda528 | bellard | { |
111 | b0bda528 | bellard | struct dma_cont *d = opaque;
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112 | b0bda528 | bellard | int ichan;
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113 | b0bda528 | bellard | |
114 | b0bda528 | bellard | ichan = channels[nport & 7];
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115 | 9eb153f1 | bellard | if (-1 == ichan) { |
116 | 85571bc7 | bellard | dolog ("invalid channel read %#x\n", nport);
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117 | 9eb153f1 | bellard | return 0; |
118 | 9eb153f1 | bellard | } |
119 | 9eb153f1 | bellard | return d->regs[ichan].page;
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120 | 27503323 | bellard | } |
121 | 27503323 | bellard | |
122 | b0bda528 | bellard | static uint32_t read_pageh (void *opaque, uint32_t nport) |
123 | b0bda528 | bellard | { |
124 | b0bda528 | bellard | struct dma_cont *d = opaque;
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125 | b0bda528 | bellard | int ichan;
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126 | b0bda528 | bellard | |
127 | b0bda528 | bellard | ichan = channels[nport & 7];
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128 | b0bda528 | bellard | if (-1 == ichan) { |
129 | 85571bc7 | bellard | dolog ("invalid channel read %#x\n", nport);
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130 | b0bda528 | bellard | return 0; |
131 | b0bda528 | bellard | } |
132 | b0bda528 | bellard | return d->regs[ichan].pageh;
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133 | b0bda528 | bellard | } |
134 | b0bda528 | bellard | |
135 | 9eb153f1 | bellard | static inline void init_chan (struct dma_cont *d, int ichan) |
136 | 27503323 | bellard | { |
137 | 27503323 | bellard | struct dma_regs *r;
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138 | 27503323 | bellard | |
139 | 9eb153f1 | bellard | r = d->regs + ichan; |
140 | 85571bc7 | bellard | r->now[ADDR] = r->base[ADDR] << d->dshift; |
141 | 27503323 | bellard | r->now[COUNT] = 0;
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142 | 27503323 | bellard | } |
143 | 27503323 | bellard | |
144 | 9eb153f1 | bellard | static inline int getff (struct dma_cont *d) |
145 | 27503323 | bellard | { |
146 | 27503323 | bellard | int ff;
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147 | 27503323 | bellard | |
148 | 9eb153f1 | bellard | ff = d->flip_flop; |
149 | 9eb153f1 | bellard | d->flip_flop = !ff; |
150 | 27503323 | bellard | return ff;
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151 | 27503323 | bellard | } |
152 | 27503323 | bellard | |
153 | 7d977de7 | bellard | static uint32_t read_chan (void *opaque, uint32_t nport) |
154 | 27503323 | bellard | { |
155 | 9eb153f1 | bellard | struct dma_cont *d = opaque;
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156 | 85571bc7 | bellard | int ichan, nreg, iport, ff, val, dir;
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157 | 27503323 | bellard | struct dma_regs *r;
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158 | 27503323 | bellard | |
159 | 9eb153f1 | bellard | iport = (nport >> d->dshift) & 0x0f;
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160 | 9eb153f1 | bellard | ichan = iport >> 1;
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161 | 9eb153f1 | bellard | nreg = iport & 1;
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162 | 9eb153f1 | bellard | r = d->regs + ichan; |
163 | 27503323 | bellard | |
164 | 85571bc7 | bellard | dir = ((r->mode >> 5) & 1) ? -1 : 1; |
165 | 9eb153f1 | bellard | ff = getff (d); |
166 | 27503323 | bellard | if (nreg)
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167 | 9eb153f1 | bellard | val = (r->base[COUNT] << d->dshift) - r->now[COUNT]; |
168 | 27503323 | bellard | else
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169 | 85571bc7 | bellard | val = r->now[ADDR] + r->now[COUNT] * dir; |
170 | 27503323 | bellard | |
171 | 85571bc7 | bellard | ldebug ("read_chan %#x -> %d\n", iport, val);
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172 | 9eb153f1 | bellard | return (val >> (d->dshift + (ff << 3))) & 0xff; |
173 | 27503323 | bellard | } |
174 | 27503323 | bellard | |
175 | 7d977de7 | bellard | static void write_chan (void *opaque, uint32_t nport, uint32_t data) |
176 | 27503323 | bellard | { |
177 | 9eb153f1 | bellard | struct dma_cont *d = opaque;
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178 | 9eb153f1 | bellard | int iport, ichan, nreg;
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179 | 27503323 | bellard | struct dma_regs *r;
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180 | 27503323 | bellard | |
181 | 9eb153f1 | bellard | iport = (nport >> d->dshift) & 0x0f;
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182 | 9eb153f1 | bellard | ichan = iport >> 1;
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183 | 9eb153f1 | bellard | nreg = iport & 1;
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184 | 9eb153f1 | bellard | r = d->regs + ichan; |
185 | 9eb153f1 | bellard | if (getff (d)) {
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186 | 3504fe17 | bellard | r->base[nreg] = (r->base[nreg] & 0xff) | ((data << 8) & 0xff00); |
187 | 9eb153f1 | bellard | init_chan (d, ichan); |
188 | 3504fe17 | bellard | } else {
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189 | 3504fe17 | bellard | r->base[nreg] = (r->base[nreg] & 0xff00) | (data & 0xff); |
190 | 27503323 | bellard | } |
191 | 27503323 | bellard | } |
192 | 27503323 | bellard | |
193 | 7d977de7 | bellard | static void write_cont (void *opaque, uint32_t nport, uint32_t data) |
194 | 27503323 | bellard | { |
195 | 9eb153f1 | bellard | struct dma_cont *d = opaque;
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196 | 85571bc7 | bellard | int iport, ichan = 0; |
197 | 27503323 | bellard | |
198 | 9eb153f1 | bellard | iport = (nport >> d->dshift) & 0x0f;
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199 | 27503323 | bellard | switch (iport) {
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200 | 85571bc7 | bellard | case 0x08: /* command */ |
201 | df475d18 | bellard | if ((data != 0) && (data & CMD_NOT_SUPPORTED)) { |
202 | 85571bc7 | bellard | dolog ("command %#x not supported\n", data);
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203 | df475d18 | bellard | return;
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204 | 27503323 | bellard | } |
205 | 27503323 | bellard | d->command = data; |
206 | 27503323 | bellard | break;
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207 | 27503323 | bellard | |
208 | 85571bc7 | bellard | case 0x09: |
209 | 27503323 | bellard | ichan = data & 3;
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210 | 27503323 | bellard | if (data & 4) { |
211 | 27503323 | bellard | d->status |= 1 << (ichan + 4); |
212 | 27503323 | bellard | } |
213 | 27503323 | bellard | else {
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214 | 27503323 | bellard | d->status &= ~(1 << (ichan + 4)); |
215 | 27503323 | bellard | } |
216 | 27503323 | bellard | d->status &= ~(1 << ichan);
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217 | 492c30af | aliguori | DMA_run(); |
218 | 27503323 | bellard | break;
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219 | 27503323 | bellard | |
220 | 85571bc7 | bellard | case 0x0a: /* single mask */ |
221 | 27503323 | bellard | if (data & 4) |
222 | 27503323 | bellard | d->mask |= 1 << (data & 3); |
223 | 27503323 | bellard | else
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224 | 27503323 | bellard | d->mask &= ~(1 << (data & 3)); |
225 | 492c30af | aliguori | DMA_run(); |
226 | 27503323 | bellard | break;
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227 | 27503323 | bellard | |
228 | 85571bc7 | bellard | case 0x0b: /* mode */ |
229 | 27503323 | bellard | { |
230 | 16d17fdb | bellard | ichan = data & 3;
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231 | 16d17fdb | bellard | #ifdef DEBUG_DMA
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232 | 85571bc7 | bellard | { |
233 | 85571bc7 | bellard | int op, ai, dir, opmode;
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234 | e875c40a | bellard | op = (data >> 2) & 3; |
235 | e875c40a | bellard | ai = (data >> 4) & 1; |
236 | e875c40a | bellard | dir = (data >> 5) & 1; |
237 | e875c40a | bellard | opmode = (data >> 6) & 3; |
238 | 27503323 | bellard | |
239 | e875c40a | bellard | linfo ("ichan %d, op %d, ai %d, dir %d, opmode %d\n",
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240 | e875c40a | bellard | ichan, op, ai, dir, opmode); |
241 | 85571bc7 | bellard | } |
242 | 27503323 | bellard | #endif
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243 | 27503323 | bellard | d->regs[ichan].mode = data; |
244 | 27503323 | bellard | break;
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245 | 27503323 | bellard | } |
246 | 27503323 | bellard | |
247 | 85571bc7 | bellard | case 0x0c: /* clear flip flop */ |
248 | 27503323 | bellard | d->flip_flop = 0;
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249 | 27503323 | bellard | break;
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250 | 27503323 | bellard | |
251 | 85571bc7 | bellard | case 0x0d: /* reset */ |
252 | 27503323 | bellard | d->flip_flop = 0;
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253 | 27503323 | bellard | d->mask = ~0;
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254 | 27503323 | bellard | d->status = 0;
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255 | 27503323 | bellard | d->command = 0;
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256 | 27503323 | bellard | break;
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257 | 27503323 | bellard | |
258 | 85571bc7 | bellard | case 0x0e: /* clear mask for all channels */ |
259 | 27503323 | bellard | d->mask = 0;
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260 | 492c30af | aliguori | DMA_run(); |
261 | 27503323 | bellard | break;
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262 | 27503323 | bellard | |
263 | 85571bc7 | bellard | case 0x0f: /* write mask for all channels */ |
264 | 27503323 | bellard | d->mask = data; |
265 | 492c30af | aliguori | DMA_run(); |
266 | 27503323 | bellard | break;
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267 | 27503323 | bellard | |
268 | 27503323 | bellard | default:
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269 | 85571bc7 | bellard | dolog ("unknown iport %#x\n", iport);
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270 | df475d18 | bellard | break;
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271 | 27503323 | bellard | } |
272 | 27503323 | bellard | |
273 | 16d17fdb | bellard | #ifdef DEBUG_DMA
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274 | 27503323 | bellard | if (0xc != iport) { |
275 | 85571bc7 | bellard | linfo ("write_cont: nport %#06x, ichan % 2d, val %#06x\n",
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276 | 9eb153f1 | bellard | nport, ichan, data); |
277 | 27503323 | bellard | } |
278 | 27503323 | bellard | #endif
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279 | 27503323 | bellard | } |
280 | 27503323 | bellard | |
281 | 9eb153f1 | bellard | static uint32_t read_cont (void *opaque, uint32_t nport) |
282 | 9eb153f1 | bellard | { |
283 | 9eb153f1 | bellard | struct dma_cont *d = opaque;
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284 | 9eb153f1 | bellard | int iport, val;
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285 | 85571bc7 | bellard | |
286 | 9eb153f1 | bellard | iport = (nport >> d->dshift) & 0x0f;
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287 | 9eb153f1 | bellard | switch (iport) {
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288 | 85571bc7 | bellard | case 0x08: /* status */ |
289 | 9eb153f1 | bellard | val = d->status; |
290 | 9eb153f1 | bellard | d->status &= 0xf0;
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291 | 9eb153f1 | bellard | break;
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292 | 85571bc7 | bellard | case 0x0f: /* mask */ |
293 | 9eb153f1 | bellard | val = d->mask; |
294 | 9eb153f1 | bellard | break;
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295 | 9eb153f1 | bellard | default:
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296 | 9eb153f1 | bellard | val = 0;
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297 | 9eb153f1 | bellard | break;
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298 | 9eb153f1 | bellard | } |
299 | 85571bc7 | bellard | |
300 | 85571bc7 | bellard | ldebug ("read_cont: nport %#06x, iport %#04x val %#x\n", nport, iport, val);
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301 | 9eb153f1 | bellard | return val;
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302 | 9eb153f1 | bellard | } |
303 | 9eb153f1 | bellard | |
304 | 27503323 | bellard | int DMA_get_channel_mode (int nchan) |
305 | 27503323 | bellard | { |
306 | 27503323 | bellard | return dma_controllers[nchan > 3].regs[nchan & 3].mode; |
307 | 27503323 | bellard | } |
308 | 27503323 | bellard | |
309 | 27503323 | bellard | void DMA_hold_DREQ (int nchan) |
310 | 27503323 | bellard | { |
311 | 27503323 | bellard | int ncont, ichan;
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312 | 27503323 | bellard | |
313 | 27503323 | bellard | ncont = nchan > 3;
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314 | 27503323 | bellard | ichan = nchan & 3;
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315 | 27503323 | bellard | linfo ("held cont=%d chan=%d\n", ncont, ichan);
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316 | 27503323 | bellard | dma_controllers[ncont].status |= 1 << (ichan + 4); |
317 | 492c30af | aliguori | DMA_run(); |
318 | 27503323 | bellard | } |
319 | 27503323 | bellard | |
320 | 27503323 | bellard | void DMA_release_DREQ (int nchan) |
321 | 27503323 | bellard | { |
322 | 27503323 | bellard | int ncont, ichan;
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323 | 27503323 | bellard | |
324 | 27503323 | bellard | ncont = nchan > 3;
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325 | 27503323 | bellard | ichan = nchan & 3;
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326 | 27503323 | bellard | linfo ("released cont=%d chan=%d\n", ncont, ichan);
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327 | 27503323 | bellard | dma_controllers[ncont].status &= ~(1 << (ichan + 4)); |
328 | 492c30af | aliguori | DMA_run(); |
329 | 27503323 | bellard | } |
330 | 27503323 | bellard | |
331 | 27503323 | bellard | static void channel_run (int ncont, int ichan) |
332 | 27503323 | bellard | { |
333 | 27503323 | bellard | int n;
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334 | 85571bc7 | bellard | struct dma_regs *r = &dma_controllers[ncont].regs[ichan];
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335 | 85571bc7 | bellard | #ifdef DEBUG_DMA
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336 | 85571bc7 | bellard | int dir, opmode;
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337 | 27503323 | bellard | |
338 | 85571bc7 | bellard | dir = (r->mode >> 5) & 1; |
339 | 85571bc7 | bellard | opmode = (r->mode >> 6) & 3; |
340 | 27503323 | bellard | |
341 | 85571bc7 | bellard | if (dir) {
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342 | 85571bc7 | bellard | dolog ("DMA in address decrement mode\n");
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343 | 85571bc7 | bellard | } |
344 | 85571bc7 | bellard | if (opmode != 1) { |
345 | 85571bc7 | bellard | dolog ("DMA not in single mode select %#x\n", opmode);
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346 | 85571bc7 | bellard | } |
347 | 85571bc7 | bellard | #endif
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348 | 27503323 | bellard | |
349 | 85571bc7 | bellard | r = dma_controllers[ncont].regs + ichan; |
350 | 85571bc7 | bellard | n = r->transfer_handler (r->opaque, ichan + (ncont << 2),
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351 | 85571bc7 | bellard | r->now[COUNT], (r->base[COUNT] + 1) << ncont);
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352 | 85571bc7 | bellard | r->now[COUNT] = n; |
353 | 85571bc7 | bellard | ldebug ("dma_pos %d size %d\n", n, (r->base[COUNT] + 1) << ncont); |
354 | 27503323 | bellard | } |
355 | 27503323 | bellard | |
356 | 492c30af | aliguori | static QEMUBH *dma_bh;
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357 | 492c30af | aliguori | |
358 | 492c30af | aliguori | static void DMA_run (void) |
359 | 27503323 | bellard | { |
360 | 27503323 | bellard | struct dma_cont *d;
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361 | 27503323 | bellard | int icont, ichan;
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362 | 492c30af | aliguori | int rearm = 0; |
363 | 27503323 | bellard | |
364 | 27503323 | bellard | d = dma_controllers; |
365 | 27503323 | bellard | |
366 | 27503323 | bellard | for (icont = 0; icont < 2; icont++, d++) { |
367 | 27503323 | bellard | for (ichan = 0; ichan < 4; ichan++) { |
368 | 27503323 | bellard | int mask;
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369 | 27503323 | bellard | |
370 | 27503323 | bellard | mask = 1 << ichan;
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371 | 27503323 | bellard | |
372 | 492c30af | aliguori | if ((0 == (d->mask & mask)) && (0 != (d->status & (mask << 4)))) { |
373 | 27503323 | bellard | channel_run (icont, ichan); |
374 | 492c30af | aliguori | rearm = 1;
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375 | 492c30af | aliguori | } |
376 | 27503323 | bellard | } |
377 | 27503323 | bellard | } |
378 | 492c30af | aliguori | |
379 | 492c30af | aliguori | if (rearm)
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380 | 492c30af | aliguori | qemu_bh_schedule_idle(dma_bh); |
381 | 492c30af | aliguori | } |
382 | 492c30af | aliguori | |
383 | 492c30af | aliguori | static void DMA_run_bh(void *unused) |
384 | 492c30af | aliguori | { |
385 | 492c30af | aliguori | DMA_run(); |
386 | 27503323 | bellard | } |
387 | 27503323 | bellard | |
388 | 27503323 | bellard | void DMA_register_channel (int nchan, |
389 | 85571bc7 | bellard | DMA_transfer_handler transfer_handler, |
390 | 16f62432 | bellard | void *opaque)
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391 | 27503323 | bellard | { |
392 | 27503323 | bellard | struct dma_regs *r;
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393 | 27503323 | bellard | int ichan, ncont;
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394 | 27503323 | bellard | |
395 | 27503323 | bellard | ncont = nchan > 3;
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396 | 27503323 | bellard | ichan = nchan & 3;
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397 | 27503323 | bellard | |
398 | 27503323 | bellard | r = dma_controllers[ncont].regs + ichan; |
399 | 16f62432 | bellard | r->transfer_handler = transfer_handler; |
400 | 16f62432 | bellard | r->opaque = opaque; |
401 | 16f62432 | bellard | } |
402 | 16f62432 | bellard | |
403 | 85571bc7 | bellard | int DMA_read_memory (int nchan, void *buf, int pos, int len) |
404 | 85571bc7 | bellard | { |
405 | 85571bc7 | bellard | struct dma_regs *r = &dma_controllers[nchan > 3].regs[nchan & 3]; |
406 | 71db710f | blueswir1 | target_phys_addr_t addr = ((r->pageh & 0x7f) << 24) | (r->page << 16) | r->now[ADDR]; |
407 | 85571bc7 | bellard | |
408 | 85571bc7 | bellard | if (r->mode & 0x20) { |
409 | 85571bc7 | bellard | int i;
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410 | 85571bc7 | bellard | uint8_t *p = buf; |
411 | 85571bc7 | bellard | |
412 | 85571bc7 | bellard | cpu_physical_memory_read (addr - pos - len, buf, len); |
413 | 85571bc7 | bellard | /* What about 16bit transfers? */
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414 | 85571bc7 | bellard | for (i = 0; i < len >> 1; i++) { |
415 | 85571bc7 | bellard | uint8_t b = p[len - i - 1];
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416 | 85571bc7 | bellard | p[i] = b; |
417 | 85571bc7 | bellard | } |
418 | 85571bc7 | bellard | } |
419 | 85571bc7 | bellard | else
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420 | 85571bc7 | bellard | cpu_physical_memory_read (addr + pos, buf, len); |
421 | 85571bc7 | bellard | |
422 | 85571bc7 | bellard | return len;
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423 | 85571bc7 | bellard | } |
424 | 85571bc7 | bellard | |
425 | 85571bc7 | bellard | int DMA_write_memory (int nchan, void *buf, int pos, int len) |
426 | 85571bc7 | bellard | { |
427 | 85571bc7 | bellard | struct dma_regs *r = &dma_controllers[nchan > 3].regs[nchan & 3]; |
428 | 71db710f | blueswir1 | target_phys_addr_t addr = ((r->pageh & 0x7f) << 24) | (r->page << 16) | r->now[ADDR]; |
429 | 85571bc7 | bellard | |
430 | 85571bc7 | bellard | if (r->mode & 0x20) { |
431 | 85571bc7 | bellard | int i;
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432 | 85571bc7 | bellard | uint8_t *p = buf; |
433 | 85571bc7 | bellard | |
434 | 85571bc7 | bellard | cpu_physical_memory_write (addr - pos - len, buf, len); |
435 | 85571bc7 | bellard | /* What about 16bit transfers? */
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436 | 85571bc7 | bellard | for (i = 0; i < len; i++) { |
437 | 85571bc7 | bellard | uint8_t b = p[len - i - 1];
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438 | 85571bc7 | bellard | p[i] = b; |
439 | 85571bc7 | bellard | } |
440 | 85571bc7 | bellard | } |
441 | 85571bc7 | bellard | else
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442 | 85571bc7 | bellard | cpu_physical_memory_write (addr + pos, buf, len); |
443 | 85571bc7 | bellard | |
444 | 85571bc7 | bellard | return len;
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445 | 85571bc7 | bellard | } |
446 | 85571bc7 | bellard | |
447 | 16f62432 | bellard | /* request the emulator to transfer a new DMA memory block ASAP */
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448 | 16f62432 | bellard | void DMA_schedule(int nchan) |
449 | 16f62432 | bellard | { |
450 | c68ea704 | bellard | CPUState *env = cpu_single_env; |
451 | c68ea704 | bellard | if (env)
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452 | c68ea704 | bellard | cpu_interrupt(env, CPU_INTERRUPT_EXIT); |
453 | 27503323 | bellard | } |
454 | 27503323 | bellard | |
455 | d7d02e3c | bellard | static void dma_reset(void *opaque) |
456 | d7d02e3c | bellard | { |
457 | d7d02e3c | bellard | struct dma_cont *d = opaque;
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458 | d7d02e3c | bellard | write_cont (d, (0x0d << d->dshift), 0); |
459 | d7d02e3c | bellard | } |
460 | d7d02e3c | bellard | |
461 | ca9cc28c | balrog | static int dma_phony_handler (void *opaque, int nchan, int dma_pos, int dma_len) |
462 | ca9cc28c | balrog | { |
463 | ca9cc28c | balrog | dolog ("unregistered DMA channel used nchan=%d dma_pos=%d dma_len=%d\n",
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464 | ca9cc28c | balrog | nchan, dma_pos, dma_len); |
465 | ca9cc28c | balrog | return dma_pos;
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466 | ca9cc28c | balrog | } |
467 | ca9cc28c | balrog | |
468 | 9eb153f1 | bellard | /* dshift = 0: 8 bit DMA, 1 = 16 bit DMA */
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469 | 85571bc7 | bellard | static void dma_init2(struct dma_cont *d, int base, int dshift, |
470 | b0bda528 | bellard | int page_base, int pageh_base) |
471 | 27503323 | bellard | { |
472 | d70040bc | pbrook | static const int page_port_list[] = { 0x1, 0x2, 0x3, 0x7 }; |
473 | 27503323 | bellard | int i;
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474 | 27503323 | bellard | |
475 | 9eb153f1 | bellard | d->dshift = dshift; |
476 | 27503323 | bellard | for (i = 0; i < 8; i++) { |
477 | 9eb153f1 | bellard | register_ioport_write (base + (i << dshift), 1, 1, write_chan, d); |
478 | 9eb153f1 | bellard | register_ioport_read (base + (i << dshift), 1, 1, read_chan, d); |
479 | 27503323 | bellard | } |
480 | b1503cda | malc | for (i = 0; i < ARRAY_SIZE (page_port_list); i++) { |
481 | 85571bc7 | bellard | register_ioport_write (page_base + page_port_list[i], 1, 1, |
482 | 9eb153f1 | bellard | write_page, d); |
483 | 85571bc7 | bellard | register_ioport_read (page_base + page_port_list[i], 1, 1, |
484 | 9eb153f1 | bellard | read_page, d); |
485 | b0bda528 | bellard | if (pageh_base >= 0) { |
486 | 85571bc7 | bellard | register_ioport_write (pageh_base + page_port_list[i], 1, 1, |
487 | b0bda528 | bellard | write_pageh, d); |
488 | 85571bc7 | bellard | register_ioport_read (pageh_base + page_port_list[i], 1, 1, |
489 | b0bda528 | bellard | read_pageh, d); |
490 | b0bda528 | bellard | } |
491 | 27503323 | bellard | } |
492 | 27503323 | bellard | for (i = 0; i < 8; i++) { |
493 | 85571bc7 | bellard | register_ioport_write (base + ((i + 8) << dshift), 1, 1, |
494 | 9eb153f1 | bellard | write_cont, d); |
495 | 85571bc7 | bellard | register_ioport_read (base + ((i + 8) << dshift), 1, 1, |
496 | 9eb153f1 | bellard | read_cont, d); |
497 | 27503323 | bellard | } |
498 | d7d02e3c | bellard | qemu_register_reset(dma_reset, d); |
499 | d7d02e3c | bellard | dma_reset(d); |
500 | b1503cda | malc | for (i = 0; i < ARRAY_SIZE (d->regs); ++i) { |
501 | ca9cc28c | balrog | d->regs[i].transfer_handler = dma_phony_handler; |
502 | ca9cc28c | balrog | } |
503 | 9eb153f1 | bellard | } |
504 | 27503323 | bellard | |
505 | 85571bc7 | bellard | static void dma_save (QEMUFile *f, void *opaque) |
506 | 85571bc7 | bellard | { |
507 | 85571bc7 | bellard | struct dma_cont *d = opaque;
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508 | 85571bc7 | bellard | int i;
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509 | 85571bc7 | bellard | |
510 | 85571bc7 | bellard | /* qemu_put_8s (f, &d->status); */
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511 | 85571bc7 | bellard | qemu_put_8s (f, &d->command); |
512 | 85571bc7 | bellard | qemu_put_8s (f, &d->mask); |
513 | 85571bc7 | bellard | qemu_put_8s (f, &d->flip_flop); |
514 | bee8d684 | ths | qemu_put_be32 (f, d->dshift); |
515 | 85571bc7 | bellard | |
516 | 85571bc7 | bellard | for (i = 0; i < 4; ++i) { |
517 | 85571bc7 | bellard | struct dma_regs *r = &d->regs[i];
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518 | bee8d684 | ths | qemu_put_be32 (f, r->now[0]);
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519 | bee8d684 | ths | qemu_put_be32 (f, r->now[1]);
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520 | 85571bc7 | bellard | qemu_put_be16s (f, &r->base[0]);
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521 | 85571bc7 | bellard | qemu_put_be16s (f, &r->base[1]);
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522 | 85571bc7 | bellard | qemu_put_8s (f, &r->mode); |
523 | 85571bc7 | bellard | qemu_put_8s (f, &r->page); |
524 | 85571bc7 | bellard | qemu_put_8s (f, &r->pageh); |
525 | 85571bc7 | bellard | qemu_put_8s (f, &r->dack); |
526 | 85571bc7 | bellard | qemu_put_8s (f, &r->eop); |
527 | 85571bc7 | bellard | } |
528 | 85571bc7 | bellard | } |
529 | 85571bc7 | bellard | |
530 | 85571bc7 | bellard | static int dma_load (QEMUFile *f, void *opaque, int version_id) |
531 | 85571bc7 | bellard | { |
532 | 85571bc7 | bellard | struct dma_cont *d = opaque;
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533 | 85571bc7 | bellard | int i;
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534 | 85571bc7 | bellard | |
535 | 85571bc7 | bellard | if (version_id != 1) |
536 | 85571bc7 | bellard | return -EINVAL;
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537 | 85571bc7 | bellard | |
538 | 85571bc7 | bellard | /* qemu_get_8s (f, &d->status); */
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539 | 85571bc7 | bellard | qemu_get_8s (f, &d->command); |
540 | 85571bc7 | bellard | qemu_get_8s (f, &d->mask); |
541 | 85571bc7 | bellard | qemu_get_8s (f, &d->flip_flop); |
542 | bee8d684 | ths | d->dshift=qemu_get_be32 (f); |
543 | 85571bc7 | bellard | |
544 | 85571bc7 | bellard | for (i = 0; i < 4; ++i) { |
545 | 85571bc7 | bellard | struct dma_regs *r = &d->regs[i];
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546 | bee8d684 | ths | r->now[0]=qemu_get_be32 (f);
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547 | bee8d684 | ths | r->now[1]=qemu_get_be32 (f);
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548 | 85571bc7 | bellard | qemu_get_be16s (f, &r->base[0]);
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549 | 85571bc7 | bellard | qemu_get_be16s (f, &r->base[1]);
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550 | 85571bc7 | bellard | qemu_get_8s (f, &r->mode); |
551 | 85571bc7 | bellard | qemu_get_8s (f, &r->page); |
552 | 85571bc7 | bellard | qemu_get_8s (f, &r->pageh); |
553 | 85571bc7 | bellard | qemu_get_8s (f, &r->dack); |
554 | 85571bc7 | bellard | qemu_get_8s (f, &r->eop); |
555 | 85571bc7 | bellard | } |
556 | 492c30af | aliguori | |
557 | 492c30af | aliguori | DMA_run(); |
558 | 492c30af | aliguori | |
559 | 85571bc7 | bellard | return 0; |
560 | 85571bc7 | bellard | } |
561 | 85571bc7 | bellard | |
562 | b0bda528 | bellard | void DMA_init (int high_page_enable) |
563 | 9eb153f1 | bellard | { |
564 | 85571bc7 | bellard | dma_init2(&dma_controllers[0], 0x00, 0, 0x80, |
565 | b0bda528 | bellard | high_page_enable ? 0x480 : -1); |
566 | b0bda528 | bellard | dma_init2(&dma_controllers[1], 0xc0, 1, 0x88, |
567 | b0bda528 | bellard | high_page_enable ? 0x488 : -1); |
568 | 85571bc7 | bellard | register_savevm ("dma", 0, 1, dma_save, dma_load, &dma_controllers[0]); |
569 | 85571bc7 | bellard | register_savevm ("dma", 1, 1, dma_save, dma_load, &dma_controllers[1]); |
570 | 492c30af | aliguori | |
571 | 492c30af | aliguori | dma_bh = qemu_bh_new(DMA_run_bh, NULL);
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572 | 27503323 | bellard | } |