2 * QEMU JAZZ RC4030 chipset
4 * Copyright (c) 2007-2008 Hervé Poussineau
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
27 #include "qemu-timer.h"
29 /********************************************************/
32 //#define DEBUG_RC4030
33 //#define DEBUG_RC4030_DMA
36 #define DPRINTF(fmt, args...) \
37 do { printf("rc4030: " fmt , ##args); } while (0)
38 static const char* irq_names[] = { "parallel", "floppy", "sound", "video",
39 "network", "scsi", "keyboard", "mouse", "serial0", "serial1" };
41 #define DPRINTF(fmt, args...)
44 #define RC4030_ERROR(fmt, args...) \
45 do { fprintf(stderr, "rc4030 ERROR: %s: " fmt, __func__ , ##args); } while (0)
47 /********************************************************/
48 /* rc4030 emulation */
50 typedef struct dma_pagetable_entry {
53 } __attribute__((packed)) dma_pagetable_entry;
55 #define DMA_PAGESIZE 4096
56 #define DMA_REG_ENABLE 1
57 #define DMA_REG_COUNT 2
58 #define DMA_REG_ADDRESS 3
60 #define DMA_FLAG_ENABLE 0x0001
61 #define DMA_FLAG_MEM_TO_DEV 0x0002
62 #define DMA_FLAG_TC_INTR 0x0100
63 #define DMA_FLAG_MEM_INTR 0x0200
64 #define DMA_FLAG_ADDR_INTR 0x0400
66 typedef struct rc4030State
68 uint32_t config; /* 0x0000: RC4030 config register */
69 uint32_t invalid_address_register; /* 0x0010: Invalid Address register */
72 uint32_t dma_regs[8][4];
73 uint32_t dma_tl_base; /* 0x0018: DMA transl. table base */
74 uint32_t dma_tl_limit; /* 0x0020: DMA transl. table limit */
77 uint32_t remote_failed_address; /* 0x0038: Remote Failed Address */
78 uint32_t memory_failed_address; /* 0x0040: Memory Failed Address */
79 uint32_t cache_ptag; /* 0x0048: I/O Cache Physical Tag */
80 uint32_t cache_ltag; /* 0x0050: I/O Cache Logical Tag */
81 uint32_t cache_bmask; /* 0x0058: I/O Cache Byte Mask */
82 uint32_t cache_bwin; /* 0x0060: I/O Cache Buffer Window */
85 uint32_t nvram_protect; /* 0x0220: NV ram protect register */
87 uint32_t rem_speed[15];
88 uint32_t imr_jazz; /* Local bus int enable mask */
89 uint32_t isr_jazz; /* Local bus int source */
92 QEMUTimer *periodic_timer;
93 uint32_t itr; /* Interval timer reload */
96 qemu_irq jazz_bus_irq;
99 static void set_next_tick(rc4030State *s)
101 qemu_irq_lower(s->timer_irq);
104 tm_hz = 1000 / (s->itr + 1);
106 qemu_mod_timer(s->periodic_timer, qemu_get_clock(vm_clock) + ticks_per_sec / tm_hz);
109 /* called for accesses to rc4030 */
110 static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
112 rc4030State *s = opaque;
116 switch (addr & ~0x3) {
117 /* Global config register */
121 /* Invalid Address register */
123 val = s->invalid_address_register;
125 /* DMA transl. table base */
127 val = s->dma_tl_base;
129 /* DMA transl. table limit */
131 val = s->dma_tl_limit;
133 /* Remote Failed Address */
135 val = s->remote_failed_address;
137 /* Memory Failed Address */
139 val = s->memory_failed_address;
141 /* I/O Cache Byte Mask */
143 val = s->cache_bmask;
145 if (s->cache_bmask == (uint32_t)-1)
148 /* Remote Speed Registers */
164 val = s->rem_speed[(addr - 0x0070) >> 3];
166 /* DMA channel base address */
200 int entry = (addr - 0x0100) >> 5;
201 int idx = (addr & 0x1f) >> 3;
202 val = s->dma_regs[entry][idx];
213 /* NV ram protect register */
215 val = s->nvram_protect;
217 /* Interval timer count */
220 qemu_irq_lower(s->timer_irq);
227 RC4030_ERROR("invalid read [" TARGET_FMT_plx "]\n", addr);
232 if ((addr & ~3) != 0x230)
233 DPRINTF("read 0x%02x at " TARGET_FMT_plx "\n", val, addr);
238 static uint32_t rc4030_readw(void *opaque, target_phys_addr_t addr)
240 uint32_t v = rc4030_readl(opaque, addr & ~0x3);
247 static uint32_t rc4030_readb(void *opaque, target_phys_addr_t addr)
249 uint32_t v = rc4030_readl(opaque, addr & ~0x3);
250 return (v >> (8 * (addr & 0x3))) & 0xff;
253 static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
255 rc4030State *s = opaque;
258 DPRINTF("write 0x%02x at " TARGET_FMT_plx "\n", val, addr);
260 switch (addr & ~0x3) {
261 /* Global config register */
265 /* DMA transl. table base */
267 s->dma_tl_base = val;
269 /* DMA transl. table limit */
271 s->dma_tl_limit = val;
273 /* DMA transl. table invalidated */
276 /* Cache Maintenance */
278 RC4030_ERROR("Cache maintenance not handled yet (val 0x%02x)\n", val);
280 /* I/O Cache Physical Tag */
284 /* I/O Cache Logical Tag */
288 /* I/O Cache Byte Mask */
290 s->cache_bmask |= val; /* HACK */
292 /* I/O Cache Buffer Window */
296 if (s->cache_ltag == 0x80000001 && s->cache_bmask == 0xf0f0f0f) {
297 target_phys_addr_t dests[] = { 4, 0, 8, 0x10 };
298 static int current = 0;
299 target_phys_addr_t dest = 0 + dests[current];
301 current = (current + 1) % (ARRAY_SIZE(dests));
302 buf = s->cache_bwin - 1;
303 cpu_physical_memory_rw(dest, &buf, 1, 1);
306 /* Remote Speed Registers */
322 s->rem_speed[(addr - 0x0070) >> 3] = val;
324 /* DMA channel base address */
358 int entry = (addr - 0x0100) >> 5;
359 int idx = (addr & 0x1f) >> 3;
360 s->dma_regs[entry][idx] = val;
367 /* Interval timer reload */
370 qemu_irq_lower(s->timer_irq);
374 RC4030_ERROR("invalid write of 0x%02x at [" TARGET_FMT_plx "]\n", val, addr);
379 static void rc4030_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
381 uint32_t old_val = rc4030_readl(opaque, addr & ~0x3);
384 val = (val << 16) | (old_val & 0x0000ffff);
386 val = val | (old_val & 0xffff0000);
387 rc4030_writel(opaque, addr & ~0x3, val);
390 static void rc4030_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
392 uint32_t old_val = rc4030_readl(opaque, addr & ~0x3);
396 val = val | (old_val & 0xffffff00);
399 val = (val << 8) | (old_val & 0xffff00ff);
402 val = (val << 16) | (old_val & 0xff00ffff);
405 val = (val << 24) | (old_val & 0x00ffffff);
408 rc4030_writel(opaque, addr & ~0x3, val);
411 static CPUReadMemoryFunc *rc4030_read[3] = {
417 static CPUWriteMemoryFunc *rc4030_write[3] = {
423 static void update_jazz_irq(rc4030State *s)
427 pending = s->isr_jazz & s->imr_jazz;
430 if (s->isr_jazz != 0) {
432 DPRINTF("pending irqs:");
433 for (irq = 0; irq < ARRAY_SIZE(irq_names); irq++) {
434 if (s->isr_jazz & (1 << irq)) {
435 printf(" %s", irq_names[irq]);
436 if (!(s->imr_jazz & (1 << irq))) {
446 qemu_irq_raise(s->jazz_bus_irq);
448 qemu_irq_lower(s->jazz_bus_irq);
451 static void rc4030_irq_jazz_request(void *opaque, int irq, int level)
453 rc4030State *s = opaque;
456 s->isr_jazz |= 1 << irq;
458 s->isr_jazz &= ~(1 << irq);
464 static void rc4030_periodic_timer(void *opaque)
466 rc4030State *s = opaque;
469 qemu_irq_raise(s->timer_irq);
472 static uint32_t jazzio_readw(void *opaque, target_phys_addr_t addr)
474 rc4030State *s = opaque;
480 /* Local bus int source */
482 uint32_t pending = s->isr_jazz & s->imr_jazz;
487 DPRINTF("returning irq %s\n", irq_names[irq]);
488 val = (irq + 1) << 2;
496 /* Local bus int enable mask */
501 RC4030_ERROR("(jazz io controller) invalid read [" TARGET_FMT_plx "]\n", addr);
505 DPRINTF("(jazz io controller) read 0x%04x at " TARGET_FMT_plx "\n", val, addr);
510 static uint32_t jazzio_readb(void *opaque, target_phys_addr_t addr)
513 v = jazzio_readw(opaque, addr & ~0x1);
514 return (v >> (8 * (addr & 0x1))) & 0xff;
517 static uint32_t jazzio_readl(void *opaque, target_phys_addr_t addr)
520 v = jazzio_readw(opaque, addr);
521 v |= jazzio_readw(opaque, addr + 2) << 16;
525 static void jazzio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
527 rc4030State *s = opaque;
530 DPRINTF("(jazz io controller) write 0x%04x at " TARGET_FMT_plx "\n", val, addr);
533 /* Local bus int enable mask */
539 RC4030_ERROR("(jazz io controller) invalid write of 0x%04x at [" TARGET_FMT_plx "]\n", val, addr);
544 static void jazzio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
546 uint32_t old_val = jazzio_readw(opaque, addr & ~0x1);
550 val = val | (old_val & 0xff00);
553 val = (val << 8) | (old_val & 0x00ff);
556 jazzio_writew(opaque, addr & ~0x1, val);
559 static void jazzio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
561 jazzio_writew(opaque, addr, val & 0xffff);
562 jazzio_writew(opaque, addr + 2, (val >> 16) & 0xffff);
565 static CPUReadMemoryFunc *jazzio_read[3] = {
571 static CPUWriteMemoryFunc *jazzio_write[3] = {
577 static void rc4030_reset(void *opaque)
579 rc4030State *s = opaque;
582 s->config = 0x410; /* some boards seem to accept 0x104 too */
583 s->invalid_address_register = 0;
585 memset(s->dma_regs, 0, sizeof(s->dma_regs));
586 s->dma_tl_base = s->dma_tl_limit = 0;
588 s->remote_failed_address = s->memory_failed_address = 0;
589 s->cache_ptag = s->cache_ltag = 0;
590 s->cache_bmask = s->cache_bwin = 0;
592 s->offset210 = 0x18186;
593 s->nvram_protect = 7;
595 for (i = 0; i < 15; i++)
597 s->imr_jazz = s->isr_jazz = 0;
601 qemu_irq_lower(s->timer_irq);
602 qemu_irq_lower(s->jazz_bus_irq);
605 static void rc4030_do_dma(void *opaque, int n, uint8_t *buf, int len, int is_write)
607 rc4030State *s = opaque;
608 target_phys_addr_t entry_addr;
609 target_phys_addr_t dma_addr, phys_addr;
610 dma_pagetable_entry entry;
611 int index, dev_to_mem;
614 s->dma_regs[n][DMA_REG_ENABLE] &= ~(DMA_FLAG_TC_INTR | DMA_FLAG_MEM_INTR | DMA_FLAG_ADDR_INTR);
616 /* Check DMA channel consistency */
617 dev_to_mem = (s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_MEM_TO_DEV) ? 0 : 1;
618 if (!(s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_ENABLE) ||
619 (is_write != dev_to_mem)) {
620 s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_MEM_INTR;
624 if (len > s->dma_regs[n][DMA_REG_COUNT])
625 len = s->dma_regs[n][DMA_REG_COUNT];
627 dma_addr = s->dma_regs[n][DMA_REG_ADDRESS];
631 s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_TC_INTR;
635 ncpy = DMA_PAGESIZE - (dma_addr & (DMA_PAGESIZE - 1));
639 /* Get DMA translation table entry */
640 index = dma_addr / DMA_PAGESIZE;
641 if (index >= s->dma_tl_limit / sizeof(dma_pagetable_entry)) {
642 s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_MEM_INTR;
645 entry_addr = s->dma_tl_base + index * sizeof(dma_pagetable_entry);
646 /* XXX: not sure. should we really use only lowest bits? */
647 entry_addr &= 0x7fffffff;
648 cpu_physical_memory_rw(entry_addr, (uint8_t *)&entry, sizeof(entry), 0);
650 /* Read/write data at right place */
651 phys_addr = entry.frame + (dma_addr & (DMA_PAGESIZE - 1));
652 cpu_physical_memory_rw(phys_addr, &buf[i], ncpy, is_write);
656 s->dma_regs[n][DMA_REG_COUNT] -= ncpy;
659 #ifdef DEBUG_RC4030_DMA
662 printf("rc4030 dma: Copying %d bytes %s host %p\n",
663 len, is_write ? "from" : "to", buf);
664 for (i = 0; i < len; i += 16) {
665 int n = min(16, len - i);
666 for (j = 0; j < n; j++)
667 printf("%02x ", buf[i + j]);
671 for (j = 0; j < n; j++)
672 printf("%c", isprint(buf[i + j]) ? buf[i + j] : '.');
679 struct rc4030DMAState {
684 static void rc4030_dma_read(void *dma, uint8_t *buf, int len)
687 rc4030_do_dma(s->opaque, s->n, buf, len, 0);
690 static void rc4030_dma_write(void *dma, uint8_t *buf, int len)
693 rc4030_do_dma(s->opaque, s->n, buf, len, 1);
696 static rc4030_dma *rc4030_allocate_dmas(void *opaque, int n)
699 struct rc4030DMAState *p;
702 s = (rc4030_dma *)qemu_mallocz(sizeof(rc4030_dma) * n);
703 p = (struct rc4030DMAState *)qemu_mallocz(sizeof(struct rc4030DMAState) * n);
704 for (i = 0; i < n; i++) {
713 qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus,
715 rc4030_dma_function *dma_read, rc4030_dma_function *dma_write)
718 int s_chipset, s_jazzio;
720 s = qemu_mallocz(sizeof(rc4030State));
724 *dmas = rc4030_allocate_dmas(s, 4);
725 *dma_read = rc4030_dma_read;
726 *dma_write = rc4030_dma_write;
728 s->periodic_timer = qemu_new_timer(vm_clock, rc4030_periodic_timer, s);
729 s->timer_irq = timer;
730 s->jazz_bus_irq = jazz_bus;
732 qemu_register_reset(rc4030_reset, s);
735 s_chipset = cpu_register_io_memory(0, rc4030_read, rc4030_write, s);
736 cpu_register_physical_memory(0x80000000, 0x300, s_chipset);
737 s_jazzio = cpu_register_io_memory(0, jazzio_read, jazzio_write, s);
738 cpu_register_physical_memory(0xf0000000, 0x00001000, s_jazzio);
740 return qemu_allocate_irqs(rc4030_irq_jazz_request, s, 16);