4 * Copyright (c) 2005-2006 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 #define DPRINTF(fmt, args...) \
31 do { printf("ESP: " fmt , ##args); } while (0)
32 #define pic_set_irq(irq, level) \
33 do { printf("ESP: set_irq(%d): %d\n", (irq), (level)); pic_set_irq((irq),(level));} while (0)
35 #define DPRINTF(fmt, args...)
39 #define ESPDMA_MAXADDR (ESPDMA_REGS * 4 - 1)
40 #define ESP_MAXREG 0x3f
42 #define DMA_VER 0xa0000000
44 #define DMA_INTREN 0x10
45 #define DMA_WRITE_MEM 0x100
46 #define DMA_LOADED 0x04000000
47 typedef struct ESPState ESPState;
50 BlockDriverState **bd;
51 uint8_t rregs[ESP_MAXREG];
52 uint8_t wregs[ESP_MAXREG];
54 uint32_t espdmaregs[ESPDMA_REGS];
56 uint32_t ti_rptr, ti_wptr;
57 uint8_t ti_buf[TI_BUFSZ];
59 SCSIDevice *scsi_dev[MAX_DISKS];
60 SCSIDevice *current_dev;
81 static void handle_satn(ESPState *s)
84 uint32_t dmaptr, dmalen;
88 dmalen = s->wregs[0] | (s->wregs[1] << 8);
89 target = s->wregs[4] & 7;
90 DPRINTF("Select with ATN len %d target %d\n", dmalen, target);
92 dmaptr = iommu_translate(s->espdmaregs[1]);
93 DPRINTF("DMA Direction: %c, addr 0x%8.8x\n",
94 s->espdmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', dmaptr);
95 cpu_physical_memory_read(dmaptr, buf, dmalen);
98 memcpy(&buf[1], s->ti_buf, dmalen);
106 if (target >= 4 || !s->scsi_dev[target]) {
108 s->rregs[4] = STAT_IN;
109 s->rregs[5] = INTR_DC;
111 s->espdmaregs[0] |= DMA_INTR;
112 pic_set_irq(s->irq, 1);
115 s->current_dev = s->scsi_dev[target];
116 datalen = scsi_send_command(s->current_dev, 0, &buf[1]);
120 s->rregs[4] = STAT_IN | STAT_TC;
122 s->rregs[4] |= STAT_DI;
123 s->ti_size = datalen;
125 s->rregs[4] |= STAT_DO;
126 s->ti_size = -datalen;
129 s->rregs[5] = INTR_BS | INTR_FC;
130 s->rregs[6] = SEQ_CD;
131 s->espdmaregs[0] |= DMA_INTR;
132 pic_set_irq(s->irq, 1);
135 static void dma_write(ESPState *s, const uint8_t *buf, uint32_t len)
139 DPRINTF("Transfer status len %d\n", len);
141 dmaptr = iommu_translate(s->espdmaregs[1]);
142 DPRINTF("DMA Direction: %c\n",
143 s->espdmaregs[0] & DMA_WRITE_MEM ? 'w': 'r');
144 cpu_physical_memory_write(dmaptr, buf, len);
145 s->rregs[4] = STAT_IN | STAT_TC | STAT_ST;
146 s->rregs[5] = INTR_BS | INTR_FC;
147 s->rregs[6] = SEQ_CD;
149 memcpy(s->ti_buf, buf, len);
155 s->espdmaregs[0] |= DMA_INTR;
156 pic_set_irq(s->irq, 1);
160 static const uint8_t okbuf[] = {0, 0};
162 static void esp_command_complete(void *opaque, uint32_t tag, int fail)
164 ESPState *s = (ESPState *)opaque;
166 DPRINTF("SCSI Command complete\n");
168 DPRINTF("SCSI command completed unexpectedly\n");
170 /* ??? Report failures. */
172 DPRINTF("Command failed\n");
173 s->rregs[4] = STAT_IN | STAT_TC | STAT_ST;
176 static void handle_ti(ESPState *s)
178 uint32_t dmaptr, dmalen, minlen, len, from, to;
181 uint8_t buf[TARGET_PAGE_SIZE];
183 dmalen = s->wregs[0] | (s->wregs[1] << 8);
188 minlen = (dmalen < s->ti_size) ? dmalen : s->ti_size;
189 DPRINTF("Transfer Information len %d\n", minlen);
191 dmaptr = iommu_translate(s->espdmaregs[1]);
192 /* Check if the transfer writes to to reads from the device. */
193 to_device = (s->espdmaregs[0] & DMA_WRITE_MEM) == 0;
194 DPRINTF("DMA Direction: %c, addr 0x%8.8x %08x\n",
195 to_device ? 'r': 'w', dmaptr, s->ti_size);
196 from = s->espdmaregs[1];
198 for (i = 0; i < minlen; i += len, from += len) {
199 dmaptr = iommu_translate(s->espdmaregs[1] + i);
200 if ((from & TARGET_PAGE_MASK) != (to & TARGET_PAGE_MASK)) {
201 len = TARGET_PAGE_SIZE - (from & ~TARGET_PAGE_MASK);
205 DPRINTF("DMA address p %08x v %08x len %08x, from %08x, to %08x\n", dmaptr, s->espdmaregs[1] + i, len, from, to);
208 cpu_physical_memory_read(dmaptr, buf, len);
209 scsi_write_data(s->current_dev, buf, len);
211 scsi_read_data(s->current_dev, buf, len);
212 cpu_physical_memory_write(dmaptr, buf, len);
216 s->rregs[4] = STAT_IN | STAT_TC | (to_device ? STAT_DO : STAT_DI);
217 s->ti_size -= minlen;
219 s->rregs[5] = INTR_BS;
222 s->espdmaregs[0] |= DMA_INTR;
224 pic_set_irq(s->irq, 1);
227 static void esp_reset(void *opaque)
229 ESPState *s = opaque;
230 memset(s->rregs, 0, ESP_MAXREG);
231 memset(s->wregs, 0, ESP_MAXREG);
232 s->rregs[0x0e] = 0x4; // Indicate fas100a
233 memset(s->espdmaregs, 0, ESPDMA_REGS * 4);
240 static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
242 ESPState *s = opaque;
245 saddr = (addr & ESP_MAXREG) >> 2;
246 DPRINTF("read reg[%d]: 0x%2.2x\n", saddr, s->rregs[saddr]);
250 if (s->ti_size > 0) {
252 if ((s->rregs[4] & 6) == 0) {
254 scsi_read_data(s->current_dev, &s->rregs[2], 0);
256 s->rregs[2] = s->ti_buf[s->ti_rptr++];
258 pic_set_irq(s->irq, 1);
260 if (s->ti_size == 0) {
267 // Clear status bits except TC
268 s->rregs[4] &= STAT_TC;
269 pic_set_irq(s->irq, 0);
270 s->espdmaregs[0] &= ~DMA_INTR;
275 return s->rregs[saddr];
278 static void esp_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
280 ESPState *s = opaque;
283 saddr = (addr & ESP_MAXREG) >> 2;
284 DPRINTF("write reg[%d]: 0x%2.2x -> 0x%2.2x\n", saddr, s->wregs[saddr], val);
288 s->rregs[saddr] = val;
292 if ((s->rregs[4] & 6) == 0) {
296 scsi_write_data(s->current_dev, &buf, 0);
299 s->ti_buf[s->ti_wptr++] = val & 0xff;
303 s->rregs[saddr] = val;
312 DPRINTF("NOP (%2.2x)\n", val);
315 DPRINTF("Flush FIFO (%2.2x)\n", val);
317 s->rregs[5] = INTR_FC;
321 DPRINTF("Chip reset (%2.2x)\n", val);
325 DPRINTF("Bus reset (%2.2x)\n", val);
326 s->rregs[5] = INTR_RST;
327 if (!(s->wregs[8] & 0x40)) {
328 s->espdmaregs[0] |= DMA_INTR;
329 pic_set_irq(s->irq, 1);
336 DPRINTF("Initiator Command Complete Sequence (%2.2x)\n", val);
337 dma_write(s, okbuf, 2);
340 DPRINTF("Message Accepted (%2.2x)\n", val);
341 dma_write(s, okbuf, 2);
342 s->rregs[5] = INTR_DC;
346 DPRINTF("Set ATN (%2.2x)\n", val);
352 DPRINTF("Set ATN & stop (%2.2x)\n", val);
356 DPRINTF("Unhandled ESP command (%2.2x)\n", val);
363 s->rregs[saddr] = val;
368 s->rregs[saddr] = val & 0x15;
371 s->rregs[saddr] = val;
376 s->wregs[saddr] = val;
379 static CPUReadMemoryFunc *esp_mem_read[3] = {
385 static CPUWriteMemoryFunc *esp_mem_write[3] = {
391 static uint32_t espdma_mem_readl(void *opaque, target_phys_addr_t addr)
393 ESPState *s = opaque;
396 saddr = (addr & ESPDMA_MAXADDR) >> 2;
397 DPRINTF("read dmareg[%d]: 0x%8.8x\n", saddr, s->espdmaregs[saddr]);
399 return s->espdmaregs[saddr];
402 static void espdma_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
404 ESPState *s = opaque;
407 saddr = (addr & ESPDMA_MAXADDR) >> 2;
408 DPRINTF("write dmareg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->espdmaregs[saddr], val);
411 if (!(val & DMA_INTREN))
412 pic_set_irq(s->irq, 0);
415 } else if (val & 0x40) {
423 s->espdmaregs[0] |= DMA_LOADED;
428 s->espdmaregs[saddr] = val;
431 static CPUReadMemoryFunc *espdma_mem_read[3] = {
437 static CPUWriteMemoryFunc *espdma_mem_write[3] = {
443 static void esp_save(QEMUFile *f, void *opaque)
445 ESPState *s = opaque;
448 qemu_put_buffer(f, s->rregs, ESP_MAXREG);
449 qemu_put_buffer(f, s->wregs, ESP_MAXREG);
450 qemu_put_be32s(f, &s->irq);
451 for (i = 0; i < ESPDMA_REGS; i++)
452 qemu_put_be32s(f, &s->espdmaregs[i]);
453 qemu_put_be32s(f, &s->ti_size);
454 qemu_put_be32s(f, &s->ti_rptr);
455 qemu_put_be32s(f, &s->ti_wptr);
456 qemu_put_buffer(f, s->ti_buf, TI_BUFSZ);
457 qemu_put_be32s(f, &s->dma);
460 static int esp_load(QEMUFile *f, void *opaque, int version_id)
462 ESPState *s = opaque;
468 qemu_get_buffer(f, s->rregs, ESP_MAXREG);
469 qemu_get_buffer(f, s->wregs, ESP_MAXREG);
470 qemu_get_be32s(f, &s->irq);
471 for (i = 0; i < ESPDMA_REGS; i++)
472 qemu_get_be32s(f, &s->espdmaregs[i]);
473 qemu_get_be32s(f, &s->ti_size);
474 qemu_get_be32s(f, &s->ti_rptr);
475 qemu_get_be32s(f, &s->ti_wptr);
476 qemu_get_buffer(f, s->ti_buf, TI_BUFSZ);
477 qemu_get_be32s(f, &s->dma);
482 void esp_init(BlockDriverState **bd, int irq, uint32_t espaddr, uint32_t espdaddr)
485 int esp_io_memory, espdma_io_memory;
488 s = qemu_mallocz(sizeof(ESPState));
495 esp_io_memory = cpu_register_io_memory(0, esp_mem_read, esp_mem_write, s);
496 cpu_register_physical_memory(espaddr, ESP_MAXREG*4, esp_io_memory);
498 espdma_io_memory = cpu_register_io_memory(0, espdma_mem_read, espdma_mem_write, s);
499 cpu_register_physical_memory(espdaddr, 16, espdma_io_memory);
503 register_savevm("esp", espaddr, 1, esp_save, esp_load, s);
504 qemu_register_reset(esp_reset, s);
505 for (i = 0; i < MAX_DISKS; i++) {
508 scsi_disk_init(bs_table[i], esp_command_complete, s);