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1 | 67e999be | bellard | /*
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2 | 67e999be | bellard | * QEMU Sparc32 DMA controller emulation
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3 | 67e999be | bellard | *
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4 | 67e999be | bellard | * Copyright (c) 2006 Fabrice Bellard
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5 | 67e999be | bellard | *
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6 | 67e999be | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 67e999be | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | 67e999be | bellard | * in the Software without restriction, including without limitation the rights
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9 | 67e999be | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 67e999be | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | 67e999be | bellard | * furnished to do so, subject to the following conditions:
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12 | 67e999be | bellard | *
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13 | 67e999be | bellard | * The above copyright notice and this permission notice shall be included in
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14 | 67e999be | bellard | * all copies or substantial portions of the Software.
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15 | 67e999be | bellard | *
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16 | 67e999be | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 67e999be | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 67e999be | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 67e999be | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 67e999be | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 67e999be | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 67e999be | bellard | * THE SOFTWARE.
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23 | 67e999be | bellard | */
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24 | 67e999be | bellard | #include "vl.h" |
25 | 67e999be | bellard | |
26 | 67e999be | bellard | /* debug DMA */
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27 | 67e999be | bellard | //#define DEBUG_DMA
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28 | 67e999be | bellard | |
29 | 67e999be | bellard | /*
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30 | 67e999be | bellard | * This is the DMA controller part of chip STP2000 (Master I/O), also
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31 | 67e999be | bellard | * produced as NCR89C100. See
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32 | 67e999be | bellard | * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
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33 | 67e999be | bellard | * and
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34 | 67e999be | bellard | * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/DMA2.txt
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35 | 67e999be | bellard | */
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36 | 67e999be | bellard | |
37 | 67e999be | bellard | #ifdef DEBUG_DMA
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38 | 67e999be | bellard | #define DPRINTF(fmt, args...) \
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39 | 67e999be | bellard | do { printf("DMA: " fmt , ##args); } while (0) |
40 | 67e999be | bellard | #define pic_set_irq_new(ctl, irq, level) \
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41 | 67e999be | bellard | do { printf("DMA: set_irq(%d): %d\n", (irq), (level)); \ |
42 | 67e999be | bellard | pic_set_irq_new((ctl), (irq),(level));} while (0) |
43 | 67e999be | bellard | #else
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44 | 67e999be | bellard | #define DPRINTF(fmt, args...)
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45 | 67e999be | bellard | #endif
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46 | 67e999be | bellard | |
47 | 67e999be | bellard | #define DMA_REGS 8 |
48 | 67e999be | bellard | #define DMA_MAXADDR (DMA_REGS * 4 - 1) |
49 | 67e999be | bellard | |
50 | 67e999be | bellard | #define DMA_VER 0xa0000000 |
51 | 67e999be | bellard | #define DMA_INTR 1 |
52 | 67e999be | bellard | #define DMA_INTREN 0x10 |
53 | 67e999be | bellard | #define DMA_WRITE_MEM 0x100 |
54 | 67e999be | bellard | #define DMA_LOADED 0x04000000 |
55 | 67e999be | bellard | #define DMA_RESET 0x80 |
56 | 67e999be | bellard | |
57 | 67e999be | bellard | typedef struct DMAState DMAState; |
58 | 67e999be | bellard | |
59 | 67e999be | bellard | struct DMAState {
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60 | 67e999be | bellard | uint32_t dmaregs[DMA_REGS]; |
61 | 67e999be | bellard | int espirq, leirq;
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62 | 67e999be | bellard | void *iommu, *esp_opaque, *lance_opaque, *intctl;
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63 | 67e999be | bellard | }; |
64 | 67e999be | bellard | |
65 | 67e999be | bellard | void ledma_set_irq(void *opaque, int isr) |
66 | 67e999be | bellard | { |
67 | 67e999be | bellard | DMAState *s = opaque; |
68 | 67e999be | bellard | |
69 | 67e999be | bellard | pic_set_irq_new(s->intctl, s->leirq, isr); |
70 | 67e999be | bellard | } |
71 | 67e999be | bellard | |
72 | 9b94dc32 | bellard | /* Note: on sparc, the lance 16 bit bus is swapped */
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73 | 9b94dc32 | bellard | void ledma_memory_read(void *opaque, target_phys_addr_t addr, |
74 | 9b94dc32 | bellard | uint8_t *buf, int len, int do_bswap) |
75 | 67e999be | bellard | { |
76 | 67e999be | bellard | DMAState *s = opaque; |
77 | 9b94dc32 | bellard | int i;
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78 | 67e999be | bellard | |
79 | 67e999be | bellard | DPRINTF("DMA write, direction: %c, addr 0x%8.8x\n",
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80 | 67e999be | bellard | s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); |
81 | 9b94dc32 | bellard | addr |= s->dmaregs[7];
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82 | 9b94dc32 | bellard | if (do_bswap) {
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83 | 9b94dc32 | bellard | sparc_iommu_memory_read(s->iommu, addr, buf, len); |
84 | 9b94dc32 | bellard | } else {
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85 | 9b94dc32 | bellard | addr &= ~1;
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86 | 9b94dc32 | bellard | len &= ~1;
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87 | 9b94dc32 | bellard | sparc_iommu_memory_read(s->iommu, addr, buf, len); |
88 | 9b94dc32 | bellard | for(i = 0; i < len; i += 2) { |
89 | 9b94dc32 | bellard | bswap16s((uint16_t *)(buf + i)); |
90 | 9b94dc32 | bellard | } |
91 | 9b94dc32 | bellard | } |
92 | 67e999be | bellard | } |
93 | 67e999be | bellard | |
94 | 9b94dc32 | bellard | void ledma_memory_write(void *opaque, target_phys_addr_t addr, |
95 | 9b94dc32 | bellard | uint8_t *buf, int len, int do_bswap) |
96 | 67e999be | bellard | { |
97 | 67e999be | bellard | DMAState *s = opaque; |
98 | 9b94dc32 | bellard | int l, i;
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99 | 9b94dc32 | bellard | uint16_t tmp_buf[32];
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100 | 67e999be | bellard | |
101 | 67e999be | bellard | DPRINTF("DMA read, direction: %c, addr 0x%8.8x\n",
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102 | 67e999be | bellard | s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); |
103 | 9b94dc32 | bellard | addr |= s->dmaregs[7];
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104 | 9b94dc32 | bellard | if (do_bswap) {
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105 | 9b94dc32 | bellard | sparc_iommu_memory_write(s->iommu, addr, buf, len); |
106 | 9b94dc32 | bellard | } else {
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107 | 9b94dc32 | bellard | addr &= ~1;
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108 | 9b94dc32 | bellard | len &= ~1;
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109 | 9b94dc32 | bellard | while (len > 0) { |
110 | 9b94dc32 | bellard | l = len; |
111 | 9b94dc32 | bellard | if (l > sizeof(tmp_buf)) |
112 | 9b94dc32 | bellard | l = sizeof(tmp_buf);
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113 | 9b94dc32 | bellard | for(i = 0; i < l; i += 2) { |
114 | 9b94dc32 | bellard | tmp_buf[i >> 1] = bswap16(*(uint16_t *)(buf + i));
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115 | 9b94dc32 | bellard | } |
116 | 9b94dc32 | bellard | sparc_iommu_memory_write(s->iommu, addr, (uint8_t *)tmp_buf, l); |
117 | 9b94dc32 | bellard | len -= l; |
118 | 9b94dc32 | bellard | buf += l; |
119 | 9b94dc32 | bellard | addr += l; |
120 | 9b94dc32 | bellard | } |
121 | 9b94dc32 | bellard | } |
122 | 67e999be | bellard | } |
123 | 67e999be | bellard | |
124 | 67e999be | bellard | void espdma_raise_irq(void *opaque) |
125 | 67e999be | bellard | { |
126 | 67e999be | bellard | DMAState *s = opaque; |
127 | 67e999be | bellard | |
128 | 67e999be | bellard | s->dmaregs[0] |= DMA_INTR;
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129 | 67e999be | bellard | pic_set_irq_new(s->intctl, s->espirq, 1);
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130 | 67e999be | bellard | } |
131 | 67e999be | bellard | |
132 | 67e999be | bellard | void espdma_clear_irq(void *opaque) |
133 | 67e999be | bellard | { |
134 | 67e999be | bellard | DMAState *s = opaque; |
135 | 67e999be | bellard | |
136 | 67e999be | bellard | s->dmaregs[0] &= ~DMA_INTR;
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137 | 67e999be | bellard | pic_set_irq_new(s->intctl, s->espirq, 0);
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138 | 67e999be | bellard | } |
139 | 67e999be | bellard | |
140 | 67e999be | bellard | void espdma_memory_read(void *opaque, uint8_t *buf, int len) |
141 | 67e999be | bellard | { |
142 | 67e999be | bellard | DMAState *s = opaque; |
143 | 67e999be | bellard | |
144 | 67e999be | bellard | DPRINTF("DMA read, direction: %c, addr 0x%8.8x\n",
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145 | 67e999be | bellard | s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); |
146 | 67e999be | bellard | sparc_iommu_memory_read(s->iommu, s->dmaregs[1], buf, len);
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147 | 67e999be | bellard | s->dmaregs[0] |= DMA_INTR;
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148 | 67e999be | bellard | s->dmaregs[1] += len;
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149 | 67e999be | bellard | } |
150 | 67e999be | bellard | |
151 | 67e999be | bellard | void espdma_memory_write(void *opaque, uint8_t *buf, int len) |
152 | 67e999be | bellard | { |
153 | 67e999be | bellard | DMAState *s = opaque; |
154 | 67e999be | bellard | |
155 | 67e999be | bellard | DPRINTF("DMA write, direction: %c, addr 0x%8.8x\n",
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156 | 67e999be | bellard | s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); |
157 | 67e999be | bellard | sparc_iommu_memory_write(s->iommu, s->dmaregs[1], buf, len);
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158 | 67e999be | bellard | s->dmaregs[0] |= DMA_INTR;
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159 | 67e999be | bellard | s->dmaregs[1] += len;
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160 | 67e999be | bellard | } |
161 | 67e999be | bellard | |
162 | 67e999be | bellard | static uint32_t dma_mem_readl(void *opaque, target_phys_addr_t addr) |
163 | 67e999be | bellard | { |
164 | 67e999be | bellard | DMAState *s = opaque; |
165 | 67e999be | bellard | uint32_t saddr; |
166 | 67e999be | bellard | |
167 | 67e999be | bellard | saddr = (addr & DMA_MAXADDR) >> 2;
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168 | 67e999be | bellard | DPRINTF("read dmareg[%d]: 0x%8.8x\n", saddr, s->dmaregs[saddr]);
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169 | 67e999be | bellard | |
170 | 67e999be | bellard | return s->dmaregs[saddr];
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171 | 67e999be | bellard | } |
172 | 67e999be | bellard | |
173 | 67e999be | bellard | static void dma_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
174 | 67e999be | bellard | { |
175 | 67e999be | bellard | DMAState *s = opaque; |
176 | 67e999be | bellard | uint32_t saddr; |
177 | 67e999be | bellard | |
178 | 67e999be | bellard | saddr = (addr & DMA_MAXADDR) >> 2;
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179 | 67e999be | bellard | DPRINTF("write dmareg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->dmaregs[saddr], val);
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180 | 67e999be | bellard | switch (saddr) {
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181 | 67e999be | bellard | case 0: |
182 | 67e999be | bellard | if (!(val & DMA_INTREN))
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183 | 67e999be | bellard | pic_set_irq_new(s->intctl, s->espirq, 0);
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184 | 67e999be | bellard | if (val & DMA_RESET) {
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185 | 67e999be | bellard | esp_reset(s->esp_opaque); |
186 | 67e999be | bellard | } else if (val & 0x40) { |
187 | 67e999be | bellard | val &= ~0x40;
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188 | 67e999be | bellard | } else if (val == 0) |
189 | 67e999be | bellard | val = 0x40;
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190 | 67e999be | bellard | val &= 0x0fffffff;
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191 | 67e999be | bellard | val |= DMA_VER; |
192 | 67e999be | bellard | break;
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193 | 67e999be | bellard | case 1: |
194 | 67e999be | bellard | s->dmaregs[0] |= DMA_LOADED;
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195 | 67e999be | bellard | break;
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196 | 67e999be | bellard | case 4: |
197 | 67e999be | bellard | if (!(val & DMA_INTREN))
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198 | 67e999be | bellard | pic_set_irq_new(s->intctl, s->leirq, 0);
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199 | 67e999be | bellard | if (val & DMA_RESET)
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200 | 67e999be | bellard | pcnet_h_reset(s->lance_opaque); |
201 | 67e999be | bellard | val &= 0x0fffffff;
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202 | 67e999be | bellard | val |= DMA_VER; |
203 | 67e999be | bellard | break;
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204 | 67e999be | bellard | default:
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205 | 67e999be | bellard | break;
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206 | 67e999be | bellard | } |
207 | 67e999be | bellard | s->dmaregs[saddr] = val; |
208 | 67e999be | bellard | } |
209 | 67e999be | bellard | |
210 | 67e999be | bellard | static CPUReadMemoryFunc *dma_mem_read[3] = { |
211 | 67e999be | bellard | dma_mem_readl, |
212 | 67e999be | bellard | dma_mem_readl, |
213 | 67e999be | bellard | dma_mem_readl, |
214 | 67e999be | bellard | }; |
215 | 67e999be | bellard | |
216 | 67e999be | bellard | static CPUWriteMemoryFunc *dma_mem_write[3] = { |
217 | 67e999be | bellard | dma_mem_writel, |
218 | 67e999be | bellard | dma_mem_writel, |
219 | 67e999be | bellard | dma_mem_writel, |
220 | 67e999be | bellard | }; |
221 | 67e999be | bellard | |
222 | 67e999be | bellard | static void dma_reset(void *opaque) |
223 | 67e999be | bellard | { |
224 | 67e999be | bellard | DMAState *s = opaque; |
225 | 67e999be | bellard | |
226 | 67e999be | bellard | memset(s->dmaregs, 0, DMA_REGS * 4); |
227 | 67e999be | bellard | s->dmaregs[0] = DMA_VER;
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228 | 67e999be | bellard | s->dmaregs[4] = DMA_VER;
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229 | 67e999be | bellard | } |
230 | 67e999be | bellard | |
231 | 67e999be | bellard | static void dma_save(QEMUFile *f, void *opaque) |
232 | 67e999be | bellard | { |
233 | 67e999be | bellard | DMAState *s = opaque; |
234 | 67e999be | bellard | unsigned int i; |
235 | 67e999be | bellard | |
236 | 67e999be | bellard | for (i = 0; i < DMA_REGS; i++) |
237 | 67e999be | bellard | qemu_put_be32s(f, &s->dmaregs[i]); |
238 | 67e999be | bellard | } |
239 | 67e999be | bellard | |
240 | 67e999be | bellard | static int dma_load(QEMUFile *f, void *opaque, int version_id) |
241 | 67e999be | bellard | { |
242 | 67e999be | bellard | DMAState *s = opaque; |
243 | 67e999be | bellard | unsigned int i; |
244 | 67e999be | bellard | |
245 | 67e999be | bellard | if (version_id != 1) |
246 | 67e999be | bellard | return -EINVAL;
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247 | 67e999be | bellard | for (i = 0; i < DMA_REGS; i++) |
248 | 67e999be | bellard | qemu_get_be32s(f, &s->dmaregs[i]); |
249 | 67e999be | bellard | |
250 | 67e999be | bellard | return 0; |
251 | 67e999be | bellard | } |
252 | 67e999be | bellard | |
253 | 67e999be | bellard | void *sparc32_dma_init(uint32_t daddr, int espirq, int leirq, void *iommu, void *intctl) |
254 | 67e999be | bellard | { |
255 | 67e999be | bellard | DMAState *s; |
256 | 67e999be | bellard | int dma_io_memory;
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257 | 67e999be | bellard | |
258 | 67e999be | bellard | s = qemu_mallocz(sizeof(DMAState));
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259 | 67e999be | bellard | if (!s)
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260 | 67e999be | bellard | return NULL; |
261 | 67e999be | bellard | |
262 | 67e999be | bellard | s->espirq = espirq; |
263 | 67e999be | bellard | s->leirq = leirq; |
264 | 67e999be | bellard | s->iommu = iommu; |
265 | 67e999be | bellard | s->intctl = intctl; |
266 | 67e999be | bellard | |
267 | 67e999be | bellard | dma_io_memory = cpu_register_io_memory(0, dma_mem_read, dma_mem_write, s);
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268 | 67e999be | bellard | cpu_register_physical_memory(daddr, 16 * 2, dma_io_memory); |
269 | 67e999be | bellard | |
270 | 67e999be | bellard | register_savevm("sparc32_dma", daddr, 1, dma_save, dma_load, s); |
271 | 67e999be | bellard | qemu_register_reset(dma_reset, s); |
272 | 67e999be | bellard | |
273 | 67e999be | bellard | return s;
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274 | 67e999be | bellard | } |
275 | 67e999be | bellard | |
276 | 67e999be | bellard | void sparc32_dma_set_reset_data(void *opaque, void *esp_opaque, |
277 | 67e999be | bellard | void *lance_opaque)
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278 | 67e999be | bellard | { |
279 | 67e999be | bellard | DMAState *s = opaque; |
280 | 67e999be | bellard | |
281 | 67e999be | bellard | s->esp_opaque = esp_opaque; |
282 | 67e999be | bellard | s->lance_opaque = lance_opaque; |
283 | 67e999be | bellard | } |