root / hw / sparc32_dma.c @ 0157644c
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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 | 6f57bbf4 | Artyom Tarasenko | * Modifications:
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7 | 6f57bbf4 | Artyom Tarasenko | * 2010-Feb-14 Artyom Tarasenko : reworked irq generation
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8 | 6f57bbf4 | Artyom Tarasenko | *
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9 | 67e999be | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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10 | 67e999be | bellard | * of this software and associated documentation files (the "Software"), to deal
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11 | 67e999be | bellard | * in the Software without restriction, including without limitation the rights
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12 | 67e999be | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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13 | 67e999be | bellard | * copies of the Software, and to permit persons to whom the Software is
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14 | 67e999be | bellard | * furnished to do so, subject to the following conditions:
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15 | 67e999be | bellard | *
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16 | 67e999be | bellard | * The above copyright notice and this permission notice shall be included in
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17 | 67e999be | bellard | * all copies or substantial portions of the Software.
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18 | 67e999be | bellard | *
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19 | 67e999be | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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20 | 67e999be | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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21 | 67e999be | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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22 | 67e999be | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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23 | 67e999be | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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24 | 67e999be | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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25 | 67e999be | bellard | * THE SOFTWARE.
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26 | 67e999be | bellard | */
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27 | 6f6260c7 | Blue Swirl | |
28 | 87ecb68b | pbrook | #include "hw.h" |
29 | 87ecb68b | pbrook | #include "sparc32_dma.h" |
30 | 87ecb68b | pbrook | #include "sun4m.h" |
31 | 6f6260c7 | Blue Swirl | #include "sysbus.h" |
32 | 97bf4851 | Blue Swirl | #include "trace.h" |
33 | 67e999be | bellard | |
34 | 67e999be | bellard | /*
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35 | 67e999be | bellard | * This is the DMA controller part of chip STP2000 (Master I/O), also
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36 | 67e999be | bellard | * produced as NCR89C100. See
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37 | 67e999be | bellard | * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
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38 | 67e999be | bellard | * and
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39 | 67e999be | bellard | * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/DMA2.txt
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40 | 67e999be | bellard | */
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41 | 67e999be | bellard | |
42 | 5aca8c3b | blueswir1 | #define DMA_REGS 4 |
43 | 5aca8c3b | blueswir1 | #define DMA_SIZE (4 * sizeof(uint32_t)) |
44 | 09723aa1 | blueswir1 | /* We need the mask, because one instance of the device is not page
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45 | 09723aa1 | blueswir1 | aligned (ledma, start address 0x0010) */
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46 | 09723aa1 | blueswir1 | #define DMA_MASK (DMA_SIZE - 1) |
47 | e0087e61 | Bob Breuer | /* OBP says 0x20 bytes for ledma, the extras are aliased to espdma */
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48 | 86d1c388 | Bob Breuer | #define DMA_ETH_SIZE (8 * sizeof(uint32_t)) |
49 | 86d1c388 | Bob Breuer | #define DMA_MAX_REG_OFFSET (2 * DMA_SIZE - 1) |
50 | 67e999be | bellard | |
51 | 67e999be | bellard | #define DMA_VER 0xa0000000 |
52 | 67e999be | bellard | #define DMA_INTR 1 |
53 | 67e999be | bellard | #define DMA_INTREN 0x10 |
54 | 67e999be | bellard | #define DMA_WRITE_MEM 0x100 |
55 | 73d74342 | Blue Swirl | #define DMA_EN 0x200 |
56 | 67e999be | bellard | #define DMA_LOADED 0x04000000 |
57 | 5aca8c3b | blueswir1 | #define DMA_DRAIN_FIFO 0x40 |
58 | 67e999be | bellard | #define DMA_RESET 0x80 |
59 | 67e999be | bellard | |
60 | 65899fe3 | Artyom Tarasenko | /* XXX SCSI and ethernet should have different read-only bit masks */
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61 | 65899fe3 | Artyom Tarasenko | #define DMA_CSR_RO_MASK 0xfe000007 |
62 | 65899fe3 | Artyom Tarasenko | |
63 | 67e999be | bellard | typedef struct DMAState DMAState; |
64 | 67e999be | bellard | |
65 | 67e999be | bellard | struct DMAState {
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66 | 6f6260c7 | Blue Swirl | SysBusDevice busdev; |
67 | 67e999be | bellard | uint32_t dmaregs[DMA_REGS]; |
68 | 5aca8c3b | blueswir1 | qemu_irq irq; |
69 | 2d069bab | blueswir1 | void *iommu;
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70 | 73d74342 | Blue Swirl | qemu_irq gpio[2];
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71 | 86d1c388 | Bob Breuer | uint32_t is_ledma; |
72 | 73d74342 | Blue Swirl | }; |
73 | 73d74342 | Blue Swirl | |
74 | 73d74342 | Blue Swirl | enum {
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75 | 73d74342 | Blue Swirl | GPIO_RESET = 0,
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76 | 73d74342 | Blue Swirl | GPIO_DMA, |
77 | 67e999be | bellard | }; |
78 | 67e999be | bellard | |
79 | 9b94dc32 | bellard | /* Note: on sparc, the lance 16 bit bus is swapped */
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80 | c227f099 | Anthony Liguori | void ledma_memory_read(void *opaque, target_phys_addr_t addr, |
81 | 9b94dc32 | bellard | uint8_t *buf, int len, int do_bswap) |
82 | 67e999be | bellard | { |
83 | 67e999be | bellard | DMAState *s = opaque; |
84 | 9b94dc32 | bellard | int i;
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85 | 67e999be | bellard | |
86 | 5aca8c3b | blueswir1 | addr |= s->dmaregs[3];
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87 | 97bf4851 | Blue Swirl | trace_ledma_memory_read(addr); |
88 | 9b94dc32 | bellard | if (do_bswap) {
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89 | 9b94dc32 | bellard | sparc_iommu_memory_read(s->iommu, addr, buf, len); |
90 | 9b94dc32 | bellard | } else {
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91 | 9b94dc32 | bellard | addr &= ~1;
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92 | 9b94dc32 | bellard | len &= ~1;
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93 | 9b94dc32 | bellard | sparc_iommu_memory_read(s->iommu, addr, buf, len); |
94 | 9b94dc32 | bellard | for(i = 0; i < len; i += 2) { |
95 | 9b94dc32 | bellard | bswap16s((uint16_t *)(buf + i)); |
96 | 9b94dc32 | bellard | } |
97 | 9b94dc32 | bellard | } |
98 | 67e999be | bellard | } |
99 | 67e999be | bellard | |
100 | c227f099 | Anthony Liguori | void ledma_memory_write(void *opaque, target_phys_addr_t addr, |
101 | 9b94dc32 | bellard | uint8_t *buf, int len, int do_bswap) |
102 | 67e999be | bellard | { |
103 | 67e999be | bellard | DMAState *s = opaque; |
104 | 9b94dc32 | bellard | int l, i;
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105 | 9b94dc32 | bellard | uint16_t tmp_buf[32];
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106 | 67e999be | bellard | |
107 | 5aca8c3b | blueswir1 | addr |= s->dmaregs[3];
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108 | 97bf4851 | Blue Swirl | trace_ledma_memory_write(addr); |
109 | 9b94dc32 | bellard | if (do_bswap) {
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110 | 9b94dc32 | bellard | sparc_iommu_memory_write(s->iommu, addr, buf, len); |
111 | 9b94dc32 | bellard | } else {
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112 | 9b94dc32 | bellard | addr &= ~1;
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113 | 9b94dc32 | bellard | len &= ~1;
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114 | 9b94dc32 | bellard | while (len > 0) { |
115 | 9b94dc32 | bellard | l = len; |
116 | 9b94dc32 | bellard | if (l > sizeof(tmp_buf)) |
117 | 9b94dc32 | bellard | l = sizeof(tmp_buf);
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118 | 9b94dc32 | bellard | for(i = 0; i < l; i += 2) { |
119 | 9b94dc32 | bellard | tmp_buf[i >> 1] = bswap16(*(uint16_t *)(buf + i));
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120 | 9b94dc32 | bellard | } |
121 | 9b94dc32 | bellard | sparc_iommu_memory_write(s->iommu, addr, (uint8_t *)tmp_buf, l); |
122 | 9b94dc32 | bellard | len -= l; |
123 | 9b94dc32 | bellard | buf += l; |
124 | 9b94dc32 | bellard | addr += l; |
125 | 9b94dc32 | bellard | } |
126 | 9b94dc32 | bellard | } |
127 | 67e999be | bellard | } |
128 | 67e999be | bellard | |
129 | 70c0de96 | blueswir1 | static void dma_set_irq(void *opaque, int irq, int level) |
130 | 67e999be | bellard | { |
131 | 67e999be | bellard | DMAState *s = opaque; |
132 | 70c0de96 | blueswir1 | if (level) {
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133 | 70c0de96 | blueswir1 | s->dmaregs[0] |= DMA_INTR;
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134 | 6f57bbf4 | Artyom Tarasenko | if (s->dmaregs[0] & DMA_INTREN) { |
135 | 97bf4851 | Blue Swirl | trace_sparc32_dma_set_irq_raise(); |
136 | 6f57bbf4 | Artyom Tarasenko | qemu_irq_raise(s->irq); |
137 | 6f57bbf4 | Artyom Tarasenko | } |
138 | 70c0de96 | blueswir1 | } else {
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139 | 6f57bbf4 | Artyom Tarasenko | if (s->dmaregs[0] & DMA_INTR) { |
140 | 6f57bbf4 | Artyom Tarasenko | s->dmaregs[0] &= ~DMA_INTR;
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141 | 6f57bbf4 | Artyom Tarasenko | if (s->dmaregs[0] & DMA_INTREN) { |
142 | 97bf4851 | Blue Swirl | trace_sparc32_dma_set_irq_lower(); |
143 | 6f57bbf4 | Artyom Tarasenko | qemu_irq_lower(s->irq); |
144 | 6f57bbf4 | Artyom Tarasenko | } |
145 | 6f57bbf4 | Artyom Tarasenko | } |
146 | 70c0de96 | blueswir1 | } |
147 | 67e999be | bellard | } |
148 | 67e999be | bellard | |
149 | 67e999be | bellard | void espdma_memory_read(void *opaque, uint8_t *buf, int len) |
150 | 67e999be | bellard | { |
151 | 67e999be | bellard | DMAState *s = opaque; |
152 | 67e999be | bellard | |
153 | 97bf4851 | Blue Swirl | trace_espdma_memory_read(s->dmaregs[1]);
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154 | 67e999be | bellard | sparc_iommu_memory_read(s->iommu, s->dmaregs[1], buf, len);
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155 | 67e999be | bellard | s->dmaregs[1] += len;
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156 | 67e999be | bellard | } |
157 | 67e999be | bellard | |
158 | 67e999be | bellard | void espdma_memory_write(void *opaque, uint8_t *buf, int len) |
159 | 67e999be | bellard | { |
160 | 67e999be | bellard | DMAState *s = opaque; |
161 | 67e999be | bellard | |
162 | 97bf4851 | Blue Swirl | trace_espdma_memory_write(s->dmaregs[1]);
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163 | 67e999be | bellard | sparc_iommu_memory_write(s->iommu, s->dmaregs[1], buf, len);
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164 | 67e999be | bellard | s->dmaregs[1] += len;
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165 | 67e999be | bellard | } |
166 | 67e999be | bellard | |
167 | c227f099 | Anthony Liguori | static uint32_t dma_mem_readl(void *opaque, target_phys_addr_t addr) |
168 | 67e999be | bellard | { |
169 | 67e999be | bellard | DMAState *s = opaque; |
170 | 67e999be | bellard | uint32_t saddr; |
171 | 67e999be | bellard | |
172 | 86d1c388 | Bob Breuer | if (s->is_ledma && (addr > DMA_MAX_REG_OFFSET)) {
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173 | e0087e61 | Bob Breuer | /* aliased to espdma, but we can't get there from here */
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174 | e0087e61 | Bob Breuer | /* buggy driver if using undocumented behavior, just return 0 */
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175 | e0087e61 | Bob Breuer | trace_sparc32_dma_mem_readl(addr, 0);
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176 | e0087e61 | Bob Breuer | return 0; |
177 | 86d1c388 | Bob Breuer | } |
178 | 09723aa1 | blueswir1 | saddr = (addr & DMA_MASK) >> 2;
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179 | 97bf4851 | Blue Swirl | trace_sparc32_dma_mem_readl(addr, s->dmaregs[saddr]); |
180 | 67e999be | bellard | return s->dmaregs[saddr];
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181 | 67e999be | bellard | } |
182 | 67e999be | bellard | |
183 | c227f099 | Anthony Liguori | static void dma_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
184 | 67e999be | bellard | { |
185 | 67e999be | bellard | DMAState *s = opaque; |
186 | 67e999be | bellard | uint32_t saddr; |
187 | 67e999be | bellard | |
188 | 86d1c388 | Bob Breuer | if (s->is_ledma && (addr > DMA_MAX_REG_OFFSET)) {
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189 | e0087e61 | Bob Breuer | /* aliased to espdma, but we can't get there from here */
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190 | e0087e61 | Bob Breuer | trace_sparc32_dma_mem_writel(addr, 0, val);
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191 | e0087e61 | Bob Breuer | return;
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192 | 86d1c388 | Bob Breuer | } |
193 | 09723aa1 | blueswir1 | saddr = (addr & DMA_MASK) >> 2;
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194 | 97bf4851 | Blue Swirl | trace_sparc32_dma_mem_writel(addr, s->dmaregs[saddr], val); |
195 | 67e999be | bellard | switch (saddr) {
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196 | 67e999be | bellard | case 0: |
197 | 6f57bbf4 | Artyom Tarasenko | if (val & DMA_INTREN) {
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198 | 65899fe3 | Artyom Tarasenko | if (s->dmaregs[0] & DMA_INTR) { |
199 | 97bf4851 | Blue Swirl | trace_sparc32_dma_set_irq_raise(); |
200 | 6f57bbf4 | Artyom Tarasenko | qemu_irq_raise(s->irq); |
201 | 6f57bbf4 | Artyom Tarasenko | } |
202 | 6f57bbf4 | Artyom Tarasenko | } else {
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203 | 6f57bbf4 | Artyom Tarasenko | if (s->dmaregs[0] & (DMA_INTR | DMA_INTREN)) { |
204 | 97bf4851 | Blue Swirl | trace_sparc32_dma_set_irq_lower(); |
205 | 6f57bbf4 | Artyom Tarasenko | qemu_irq_lower(s->irq); |
206 | 6f57bbf4 | Artyom Tarasenko | } |
207 | d537cf6c | pbrook | } |
208 | 67e999be | bellard | if (val & DMA_RESET) {
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209 | 73d74342 | Blue Swirl | qemu_irq_raise(s->gpio[GPIO_RESET]); |
210 | 73d74342 | Blue Swirl | qemu_irq_lower(s->gpio[GPIO_RESET]); |
211 | 5aca8c3b | blueswir1 | } else if (val & DMA_DRAIN_FIFO) { |
212 | 5aca8c3b | blueswir1 | val &= ~DMA_DRAIN_FIFO; |
213 | 67e999be | bellard | } else if (val == 0) |
214 | 5aca8c3b | blueswir1 | val = DMA_DRAIN_FIFO; |
215 | 73d74342 | Blue Swirl | |
216 | 73d74342 | Blue Swirl | if (val & DMA_EN && !(s->dmaregs[0] & DMA_EN)) { |
217 | 97bf4851 | Blue Swirl | trace_sparc32_dma_enable_raise(); |
218 | 73d74342 | Blue Swirl | qemu_irq_raise(s->gpio[GPIO_DMA]); |
219 | 73d74342 | Blue Swirl | } else if (!(val & DMA_EN) && !!(s->dmaregs[0] & DMA_EN)) { |
220 | 97bf4851 | Blue Swirl | trace_sparc32_dma_enable_lower(); |
221 | 73d74342 | Blue Swirl | qemu_irq_lower(s->gpio[GPIO_DMA]); |
222 | 73d74342 | Blue Swirl | } |
223 | 73d74342 | Blue Swirl | |
224 | 65899fe3 | Artyom Tarasenko | val &= ~DMA_CSR_RO_MASK; |
225 | 67e999be | bellard | val |= DMA_VER; |
226 | 65899fe3 | Artyom Tarasenko | s->dmaregs[0] = (s->dmaregs[0] & DMA_CSR_RO_MASK) | val; |
227 | 67e999be | bellard | break;
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228 | 67e999be | bellard | case 1: |
229 | 67e999be | bellard | s->dmaregs[0] |= DMA_LOADED;
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230 | 65899fe3 | Artyom Tarasenko | /* fall through */
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231 | 67e999be | bellard | default:
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232 | 65899fe3 | Artyom Tarasenko | s->dmaregs[saddr] = val; |
233 | 67e999be | bellard | break;
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234 | 67e999be | bellard | } |
235 | 67e999be | bellard | } |
236 | 67e999be | bellard | |
237 | d60efc6b | Blue Swirl | static CPUReadMemoryFunc * const dma_mem_read[3] = { |
238 | 7c560456 | blueswir1 | NULL,
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239 | 7c560456 | blueswir1 | NULL,
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240 | 67e999be | bellard | dma_mem_readl, |
241 | 67e999be | bellard | }; |
242 | 67e999be | bellard | |
243 | d60efc6b | Blue Swirl | static CPUWriteMemoryFunc * const dma_mem_write[3] = { |
244 | 7c560456 | blueswir1 | NULL,
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245 | 7c560456 | blueswir1 | NULL,
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246 | 67e999be | bellard | dma_mem_writel, |
247 | 67e999be | bellard | }; |
248 | 67e999be | bellard | |
249 | 49ef6c90 | Blue Swirl | static void dma_reset(DeviceState *d) |
250 | 67e999be | bellard | { |
251 | 49ef6c90 | Blue Swirl | DMAState *s = container_of(d, DMAState, busdev.qdev); |
252 | 67e999be | bellard | |
253 | 5aca8c3b | blueswir1 | memset(s->dmaregs, 0, DMA_SIZE);
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254 | 67e999be | bellard | s->dmaregs[0] = DMA_VER;
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255 | 67e999be | bellard | } |
256 | 67e999be | bellard | |
257 | 75c497dc | Blue Swirl | static const VMStateDescription vmstate_dma = { |
258 | 75c497dc | Blue Swirl | .name ="sparc32_dma",
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259 | 75c497dc | Blue Swirl | .version_id = 2,
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260 | 75c497dc | Blue Swirl | .minimum_version_id = 2,
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261 | 75c497dc | Blue Swirl | .minimum_version_id_old = 2,
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262 | 75c497dc | Blue Swirl | .fields = (VMStateField []) { |
263 | 75c497dc | Blue Swirl | VMSTATE_UINT32_ARRAY(dmaregs, DMAState, DMA_REGS), |
264 | 75c497dc | Blue Swirl | VMSTATE_END_OF_LIST() |
265 | 75c497dc | Blue Swirl | } |
266 | 75c497dc | Blue Swirl | }; |
267 | 67e999be | bellard | |
268 | 81a322d4 | Gerd Hoffmann | static int sparc32_dma_init1(SysBusDevice *dev) |
269 | 6f6260c7 | Blue Swirl | { |
270 | 6f6260c7 | Blue Swirl | DMAState *s = FROM_SYSBUS(DMAState, dev); |
271 | 6f6260c7 | Blue Swirl | int dma_io_memory;
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272 | 86d1c388 | Bob Breuer | int reg_size;
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273 | 67e999be | bellard | |
274 | 6f6260c7 | Blue Swirl | sysbus_init_irq(dev, &s->irq); |
275 | 67e999be | bellard | |
276 | 2507c12a | Alexander Graf | dma_io_memory = cpu_register_io_memory(dma_mem_read, dma_mem_write, s, |
277 | 2507c12a | Alexander Graf | DEVICE_NATIVE_ENDIAN); |
278 | 86d1c388 | Bob Breuer | reg_size = s->is_ledma ? DMA_ETH_SIZE : DMA_SIZE; |
279 | 86d1c388 | Bob Breuer | sysbus_init_mmio(dev, reg_size, dma_io_memory); |
280 | 67e999be | bellard | |
281 | 6f6260c7 | Blue Swirl | qdev_init_gpio_in(&dev->qdev, dma_set_irq, 1);
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282 | 73d74342 | Blue Swirl | qdev_init_gpio_out(&dev->qdev, s->gpio, 2);
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283 | 49ef6c90 | Blue Swirl | |
284 | 81a322d4 | Gerd Hoffmann | return 0; |
285 | 6f6260c7 | Blue Swirl | } |
286 | 67e999be | bellard | |
287 | 6f6260c7 | Blue Swirl | static SysBusDeviceInfo sparc32_dma_info = {
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288 | 6f6260c7 | Blue Swirl | .init = sparc32_dma_init1, |
289 | 6f6260c7 | Blue Swirl | .qdev.name = "sparc32_dma",
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290 | 6f6260c7 | Blue Swirl | .qdev.size = sizeof(DMAState),
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291 | 49ef6c90 | Blue Swirl | .qdev.vmsd = &vmstate_dma, |
292 | 49ef6c90 | Blue Swirl | .qdev.reset = dma_reset, |
293 | ee6847d1 | Gerd Hoffmann | .qdev.props = (Property[]) { |
294 | 3180d772 | Gerd Hoffmann | DEFINE_PROP_PTR("iommu_opaque", DMAState, iommu),
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295 | 86d1c388 | Bob Breuer | DEFINE_PROP_UINT32("is_ledma", DMAState, is_ledma, 0), |
296 | 3180d772 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
297 | 6f6260c7 | Blue Swirl | } |
298 | 6f6260c7 | Blue Swirl | }; |
299 | 6f6260c7 | Blue Swirl | |
300 | 6f6260c7 | Blue Swirl | static void sparc32_dma_register_devices(void) |
301 | 6f6260c7 | Blue Swirl | { |
302 | 6f6260c7 | Blue Swirl | sysbus_register_withprop(&sparc32_dma_info); |
303 | 67e999be | bellard | } |
304 | 6f6260c7 | Blue Swirl | |
305 | 6f6260c7 | Blue Swirl | device_init(sparc32_dma_register_devices) |