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-rw-r--r--hw/rc4030.c286
1 files changed, 209 insertions, 77 deletions
diff --git a/hw/rc4030.c b/hw/rc4030.c
index 89cec6e3bb..c37c252508 100644
--- a/hw/rc4030.c
+++ b/hw/rc4030.c
@@ -26,13 +26,43 @@
#include "mips.h"
#include "qemu-timer.h"
+/********************************************************/
+/* debug rc4030 */
+
//#define DEBUG_RC4030
+//#define DEBUG_RC4030_DMA
#ifdef DEBUG_RC4030
+#define DPRINTF(fmt, args...) \
+do { printf("rc4030: " fmt , ##args); } while (0)
static const char* irq_names[] = { "parallel", "floppy", "sound", "video",
"network", "scsi", "keyboard", "mouse", "serial0", "serial1" };
+#else
+#define DPRINTF(fmt, args...)
#endif
+#define RC4030_ERROR(fmt, args...) \
+do { fprintf(stderr, "rc4030 ERROR: %s: " fmt, __func__ , ##args); } while (0)
+
+/********************************************************/
+/* rc4030 emulation */
+
+typedef struct dma_pagetable_entry {
+ int32_t frame;
+ int32_t owner;
+} __attribute__((packed)) dma_pagetable_entry;
+
+#define DMA_PAGESIZE 4096
+#define DMA_REG_ENABLE 1
+#define DMA_REG_COUNT 2
+#define DMA_REG_ADDRESS 3
+
+#define DMA_FLAG_ENABLE 0x0001
+#define DMA_FLAG_MEM_TO_DEV 0x0002
+#define DMA_FLAG_TC_INTR 0x0100
+#define DMA_FLAG_MEM_INTR 0x0200
+#define DMA_FLAG_ADDR_INTR 0x0400
+
typedef struct rc4030State
{
uint32_t config; /* 0x0000: RC4030 config register */
@@ -51,7 +81,6 @@ typedef struct rc4030State
uint32_t cache_bmask; /* 0x0058: I/O Cache Byte Mask */
uint32_t cache_bwin; /* 0x0060: I/O Cache Buffer Window */
- uint32_t offset208;
uint32_t offset210;
uint32_t nvram_protect; /* 0x0220: NV ram protect register */
uint32_t offset238;
@@ -63,7 +92,6 @@ typedef struct rc4030State
QEMUTimer *periodic_timer;
uint32_t itr; /* Interval timer reload */
- uint32_t dummy32;
qemu_irq timer_irq;
qemu_irq jazz_bus_irq;
} rc4030State;
@@ -165,7 +193,7 @@ static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
case 0x01d0:
case 0x01d8:
case 0x01e0:
- case 0x1e8:
+ case 0x01e8:
case 0x01f0:
case 0x01f8:
{
@@ -176,7 +204,7 @@ static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
break;
/* Offset 0x0208 */
case 0x0208:
- val = s->offset208;
+ val = 0;
break;
/* Offset 0x0210 */
case 0x0210:
@@ -188,7 +216,7 @@ static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
break;
/* Interval timer count */
case 0x0230:
- val = s->dummy32;
+ val = 0;
qemu_irq_lower(s->timer_irq);
break;
/* Offset 0x0238 */
@@ -196,17 +224,13 @@ static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
val = s->offset238;
break;
default:
-#ifdef DEBUG_RC4030
- printf("rc4030: invalid read [" TARGET_FMT_lx "]\n", addr);
-#endif
+ RC4030_ERROR("invalid read [" TARGET_FMT_plx "]\n", addr);
val = 0;
break;
}
-#ifdef DEBUG_RC4030
if ((addr & ~3) != 0x230)
- printf("rc4030: read 0x%02x at " TARGET_FMT_lx "\n", val, addr);
-#endif
+ DPRINTF("read 0x%02x at " TARGET_FMT_plx "\n", val, addr);
return val;
}
@@ -231,9 +255,7 @@ static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
rc4030State *s = opaque;
addr &= 0x3fff;
-#ifdef DEBUG_RC4030
- printf("rc4030: write 0x%02x at " TARGET_FMT_lx "\n", val, addr);
-#endif
+ DPRINTF("write 0x%02x at " TARGET_FMT_plx "\n", val, addr);
switch (addr & ~0x3) {
/* Global config register */
@@ -248,6 +270,13 @@ static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
case 0x0020:
s->dma_tl_limit = val;
break;
+ /* DMA transl. table invalidated */
+ case 0x0028:
+ break;
+ /* Cache Maintenance */
+ case 0x0030:
+ RC4030_ERROR("Cache maintenance not handled yet (val 0x%02x)\n", val);
+ break;
/* I/O Cache Physical Tag */
case 0x0048:
s->cache_ptag = val;
@@ -322,7 +351,7 @@ static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
case 0x01d0:
case 0x01d8:
case 0x01e0:
- case 0x1e8:
+ case 0x01e8:
case 0x01f0:
case 0x01f8:
{
@@ -342,9 +371,7 @@ static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
set_next_tick(s);
break;
default:
-#ifdef DEBUG_RC4030
- printf("rc4030: invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
-#endif
+ RC4030_ERROR("invalid write of 0x%02x at [" TARGET_FMT_plx "]\n", val, addr);
break;
}
}
@@ -402,7 +429,7 @@ static void update_jazz_irq(rc4030State *s)
#ifdef DEBUG_RC4030
if (s->isr_jazz != 0) {
uint32_t irq = 0;
- printf("jazz pending:");
+ DPRINTF("pending irqs:");
for (irq = 0; irq < ARRAY_SIZE(irq_names); irq++) {
if (s->isr_jazz & (1 << irq)) {
printf(" %s", irq_names[irq]);
@@ -442,7 +469,7 @@ static void rc4030_periodic_timer(void *opaque)
qemu_irq_raise(s->timer_irq);
}
-static uint32_t int_readb(void *opaque, target_phys_addr_t addr)
+static uint32_t jazzio_readw(void *opaque, target_phys_addr_t addr)
{
rc4030State *s = opaque;
uint32_t val;
@@ -450,14 +477,14 @@ static uint32_t int_readb(void *opaque, target_phys_addr_t addr)
addr &= 0xfff;
switch (addr) {
+ /* Local bus int source */
case 0x00: {
- /* Local bus int source */
uint32_t pending = s->isr_jazz & s->imr_jazz;
val = 0;
irq = 0;
while (pending) {
if (pending & 1) {
- //printf("returning irq %s\n", irq_names[irq]);
+ DPRINTF("returning irq %s\n", irq_names[irq]);
val = (irq + 1) << 2;
break;
}
@@ -466,100 +493,93 @@ static uint32_t int_readb(void *opaque, target_phys_addr_t addr)
}
break;
}
+ /* Local bus int enable mask */
+ case 0x02:
+ val = s->imr_jazz;
+ break;
default:
-#ifdef DEBUG_RC4030
- printf("rc4030: (interrupt controller) invalid read [" TARGET_FMT_lx "]\n", addr);
-#endif
- val = 0;
+ RC4030_ERROR("(jazz io controller) invalid read [" TARGET_FMT_plx "]\n", addr);
+ val = 0;
}
-#ifdef DEBUG_RC4030
- printf("rc4030: (interrupt controller) read 0x%02x at " TARGET_FMT_lx "\n", val, addr);
-#endif
+ DPRINTF("(jazz io controller) read 0x%04x at " TARGET_FMT_plx "\n", val, addr);
return val;
}
-static uint32_t int_readw(void *opaque, target_phys_addr_t addr)
+static uint32_t jazzio_readb(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
- v = int_readb(opaque, addr);
- v |= int_readb(opaque, addr + 1) << 8;
- return v;
+ v = jazzio_readw(opaque, addr & ~0x1);
+ return (v >> (8 * (addr & 0x1))) & 0xff;
}
-static uint32_t int_readl(void *opaque, target_phys_addr_t addr)
+static uint32_t jazzio_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
- v = int_readb(opaque, addr);
- v |= int_readb(opaque, addr + 1) << 8;
- v |= int_readb(opaque, addr + 2) << 16;
- v |= int_readb(opaque, addr + 3) << 24;
+ v = jazzio_readw(opaque, addr);
+ v |= jazzio_readw(opaque, addr + 2) << 16;
return v;
}
-static void int_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+static void jazzio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
rc4030State *s = opaque;
addr &= 0xfff;
-#ifdef DEBUG_RC4030
- printf("rc4030: (interrupt controller) write 0x%02x at " TARGET_FMT_lx "\n", val, addr);
-#endif
+ DPRINTF("(jazz io controller) write 0x%04x at " TARGET_FMT_plx "\n", val, addr);
switch (addr) {
/* Local bus int enable mask */
case 0x02:
- s->imr_jazz = (s->imr_jazz & 0xff00) | (val << 0); update_jazz_irq(s);
- break;
- case 0x03:
- s->imr_jazz = (s->imr_jazz & 0x00ff) | (val << 8); update_jazz_irq(s);
+ s->imr_jazz = val;
+ update_jazz_irq(s);
break;
default:
-#ifdef DEBUG_RC4030
- printf("rc4030: (interrupt controller) invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
-#endif
+ RC4030_ERROR("(jazz io controller) invalid write of 0x%04x at [" TARGET_FMT_plx "]\n", val, addr);
break;
}
}
-static void int_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
+static void jazzio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
- int_writeb(opaque, addr, val & 0xff);
- int_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+ uint32_t old_val = jazzio_readw(opaque, addr & ~0x1);
+
+ switch (addr & 1) {
+ case 0:
+ val = val | (old_val & 0xff00);
+ break;
+ case 1:
+ val = (val << 8) | (old_val & 0x00ff);
+ break;
+ }
+ jazzio_writew(opaque, addr & ~0x1, val);
}
-static void int_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+static void jazzio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
- int_writeb(opaque, addr, val & 0xff);
- int_writeb(opaque, addr + 1, (val >> 8) & 0xff);
- int_writeb(opaque, addr + 2, (val >> 16) & 0xff);
- int_writeb(opaque, addr + 3, (val >> 24) & 0xff);
+ jazzio_writew(opaque, addr, val & 0xffff);
+ jazzio_writew(opaque, addr + 2, (val >> 16) & 0xffff);
}
-static CPUReadMemoryFunc *int_read[3] = {
- int_readb,
- int_readw,
- int_readl,
+static CPUReadMemoryFunc *jazzio_read[3] = {
+ jazzio_readb,
+ jazzio_readw,
+ jazzio_readl,
};
-static CPUWriteMemoryFunc *int_write[3] = {
- int_writeb,
- int_writew,
- int_writel,
+static CPUWriteMemoryFunc *jazzio_write[3] = {
+ jazzio_writeb,
+ jazzio_writew,
+ jazzio_writel,
};
-#define G364_512KB_RAM (0x0)
-#define G364_2MB_RAM (0x1)
-#define G364_8MB_RAM (0x2)
-#define G364_32MB_RAM (0x3)
-
static void rc4030_reset(void *opaque)
{
rc4030State *s = opaque;
int i;
- s->config = (G364_2MB_RAM << 8) | 0x04;
+ s->config = 0x410; /* some boards seem to accept 0x104 too */
s->invalid_address_register = 0;
memset(s->dma_regs, 0, sizeof(s->dma_regs));
@@ -569,7 +589,6 @@ static void rc4030_reset(void *opaque)
s->cache_ptag = s->cache_ltag = 0;
s->cache_bmask = s->cache_bwin = 0;
- s->offset208 = 0;
s->offset210 = 0x18186;
s->nvram_protect = 7;
s->offset238 = 7;
@@ -578,21 +597,134 @@ static void rc4030_reset(void *opaque)
s->imr_jazz = s->isr_jazz = 0;
s->itr = 0;
- s->dummy32 = 0;
qemu_irq_lower(s->timer_irq);
qemu_irq_lower(s->jazz_bus_irq);
}
-qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus)
+static void rc4030_do_dma(void *opaque, int n, uint8_t *buf, int len, int is_write)
+{
+ rc4030State *s = opaque;
+ target_phys_addr_t entry_addr;
+ target_phys_addr_t dma_addr, phys_addr;
+ dma_pagetable_entry entry;
+ int index, dev_to_mem;
+ int ncpy, i;
+
+ s->dma_regs[n][DMA_REG_ENABLE] &= ~(DMA_FLAG_TC_INTR | DMA_FLAG_MEM_INTR | DMA_FLAG_ADDR_INTR);
+
+ /* Check DMA channel consistency */
+ dev_to_mem = (s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_MEM_TO_DEV) ? 0 : 1;
+ if (!(s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_ENABLE) ||
+ (is_write != dev_to_mem)) {
+ s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_MEM_INTR;
+ return;
+ }
+
+ if (len > s->dma_regs[n][DMA_REG_COUNT])
+ len = s->dma_regs[n][DMA_REG_COUNT];
+
+ dma_addr = s->dma_regs[n][DMA_REG_ADDRESS];
+ i = 0;
+ for (;;) {
+ if (i == len) {
+ s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_TC_INTR;
+ break;
+ }
+
+ ncpy = DMA_PAGESIZE - (dma_addr & (DMA_PAGESIZE - 1));
+ if (ncpy > len - i)
+ ncpy = len - i;
+
+ /* Get DMA translation table entry */
+ index = dma_addr / DMA_PAGESIZE;
+ if (index >= s->dma_tl_limit / sizeof(dma_pagetable_entry)) {
+ s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_MEM_INTR;
+ break;
+ }
+ entry_addr = s->dma_tl_base + index * sizeof(dma_pagetable_entry);
+ /* XXX: not sure. should we really use only lowest bits? */
+ entry_addr &= 0x7fffffff;
+ cpu_physical_memory_rw(entry_addr, (uint8_t *)&entry, sizeof(entry), 0);
+
+ /* Read/write data at right place */
+ phys_addr = entry.frame + (dma_addr & (DMA_PAGESIZE - 1));
+ cpu_physical_memory_rw(phys_addr, &buf[i], ncpy, is_write);
+
+ i += ncpy;
+ dma_addr += ncpy;
+ s->dma_regs[n][DMA_REG_COUNT] -= ncpy;
+ }
+
+#ifdef DEBUG_RC4030_DMA
+ {
+ int i, j;
+ printf("rc4030 dma: Copying %d bytes %s host %p\n",
+ len, is_write ? "from" : "to", buf);
+ for (i = 0; i < len; i += 16) {
+ int n = min(16, len - i);
+ for (j = 0; j < n; j++)
+ printf("%02x ", buf[i + j]);
+ while (j++ < 16)
+ printf(" ");
+ printf("| ");
+ for (j = 0; j < n; j++)
+ printf("%c", isprint(buf[i + j]) ? buf[i + j] : '.');
+ printf("\n");
+ }
+ }
+#endif
+}
+
+struct rc4030DMAState {
+ void *opaque;
+ int n;
+};
+
+static void rc4030_dma_read(void *dma, uint8_t *buf, int len)
+{
+ rc4030_dma s = dma;
+ rc4030_do_dma(s->opaque, s->n, buf, len, 0);
+}
+
+static void rc4030_dma_write(void *dma, uint8_t *buf, int len)
+{
+ rc4030_dma s = dma;
+ rc4030_do_dma(s->opaque, s->n, buf, len, 1);
+}
+
+static rc4030_dma *rc4030_allocate_dmas(void *opaque, int n)
+{
+ rc4030_dma *s;
+ struct rc4030DMAState *p;
+ int i;
+
+ s = (rc4030_dma *)qemu_mallocz(sizeof(rc4030_dma) * n);
+ p = (struct rc4030DMAState *)qemu_mallocz(sizeof(struct rc4030DMAState) * n);
+ for (i = 0; i < n; i++) {
+ p->opaque = opaque;
+ p->n = i;
+ s[i] = p;
+ p++;
+ }
+ return s;
+}
+
+qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus,
+ rc4030_dma **dmas,
+ rc4030_dma_function *dma_read, rc4030_dma_function *dma_write)
{
rc4030State *s;
- int s_chipset, s_int;
+ int s_chipset, s_jazzio;
s = qemu_mallocz(sizeof(rc4030State));
if (!s)
return NULL;
+ *dmas = rc4030_allocate_dmas(s, 4);
+ *dma_read = rc4030_dma_read;
+ *dma_write = rc4030_dma_write;
+
s->periodic_timer = qemu_new_timer(vm_clock, rc4030_periodic_timer, s);
s->timer_irq = timer;
s->jazz_bus_irq = jazz_bus;
@@ -602,8 +734,8 @@ qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus)
s_chipset = cpu_register_io_memory(0, rc4030_read, rc4030_write, s);
cpu_register_physical_memory(0x80000000, 0x300, s_chipset);
- s_int = cpu_register_io_memory(0, int_read, int_write, s);
- cpu_register_physical_memory(0xf0000000, 0x00001000, s_int);
+ s_jazzio = cpu_register_io_memory(0, jazzio_read, jazzio_write, s);
+ cpu_register_physical_memory(0xf0000000, 0x00001000, s_jazzio);
return qemu_allocate_irqs(rc4030_irq_jazz_request, s, 16);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 20:11:25 +0000