diff options
| -rw-r--r-- | hw/m68k/next-cube.c | 117 |
1 files changed, 110 insertions, 7 deletions
diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c index 2c94c6a9c2..fabd861941 100644 --- a/hw/m68k/next-cube.c +++ b/hw/m68k/next-cube.c @@ -90,10 +90,13 @@ struct NeXTPC { uint32_t scr1; uint32_t scr2; - uint8_t scsi_csr_1; - uint8_t scsi_csr_2; uint32_t int_mask; uint32_t int_status; + uint8_t scsi_csr_1; + uint8_t scsi_csr_2; + + qemu_irq scsi_reset; + qemu_irq scsi_dma; NextRtc rtc; }; @@ -466,7 +469,7 @@ static void scr_writeb(NeXTPC *s, hwaddr addr, uint32_t value) DPRINTF("SCSICSR FIFO Flush\n"); /* will have to add another irq to the esp if this is needed */ /* esp_puflush_fifo(esp_g); */ - /* qemu_irq_pulse(s->scsi_dma); */ + qemu_irq_pulse(s->scsi_dma); } if (value & SCSICSR_ENABLE) { @@ -486,9 +489,9 @@ static void scr_writeb(NeXTPC *s, hwaddr addr, uint32_t value) if (value & SCSICSR_RESET) { DPRINTF("SCSICSR Reset\n"); /* I think this should set DMADIR. CPUDMA and INTMASK to 0 */ - /* qemu_irq_raise(s->scsi_reset); */ - /* s->scsi_csr_1 &= ~(SCSICSR_INTMASK |0x80|0x1); */ - + qemu_irq_raise(s->scsi_reset); + s->scsi_csr_1 &= ~(SCSICSR_INTMASK | 0x80 | 0x1); + qemu_irq_lower(s->scsi_reset); } if (value & SCSICSR_DMADIR) { DPRINTF("SCSICSR DMAdir\n"); @@ -496,10 +499,11 @@ static void scr_writeb(NeXTPC *s, hwaddr addr, uint32_t value) if (value & SCSICSR_CPUDMA) { DPRINTF("SCSICSR CPUDMA\n"); /* qemu_irq_raise(s->scsi_dma); */ - s->int_status |= 0x4000000; } else { + /* fprintf(stderr,"SCSICSR CPUDMA disabled\n"); */ s->int_status &= ~(0x4000000); + /* qemu_irq_lower(s->scsi_dma); */ } if (value & SCSICSR_INTMASK) { DPRINTF("SCSICSR INTMASK\n"); @@ -828,6 +832,103 @@ static void next_irq(void *opaque, int number, int level) } } +static void nextdma_write(void *opaque, uint8_t *buf, int size, int type) +{ + uint32_t base_addr; + int irq = 0; + uint8_t align = 16; + NeXTState *next_state = NEXT_MACHINE(qdev_get_machine()); + + if (type == NEXTDMA_ENRX || type == NEXTDMA_ENTX) { + align = 32; + } + /* Most DMA is supposedly 16 byte aligned */ + if ((size % align) != 0) { + size -= size % align; + size += align; + } + + /* + * prom sets the dma start using initbuf while the bootloader uses next + * so we check to see if initbuf is 0 + */ + if (next_state->dma[type].next_initbuf == 0) { + base_addr = next_state->dma[type].next; + } else { + base_addr = next_state->dma[type].next_initbuf; + } + + cpu_physical_memory_write(base_addr, buf, size); + + next_state->dma[type].next_initbuf = 0; + + /* saved limit is checked to calculate packet size by both, rom and netbsd */ + next_state->dma[type].saved_limit = (next_state->dma[type].next + size); + next_state->dma[type].saved_next = (next_state->dma[type].next); + + /* + * 32 bytes under savedbase seems to be some kind of register + * of which the purpose is unknown as of yet + */ + /* stl_phys(s->rx_dma.base-32,0xFFFFFFFF); */ + + if (!(next_state->dma[type].csr & DMA_SUPDATE)) { + next_state->dma[type].next = next_state->dma[type].start; + next_state->dma[type].limit = next_state->dma[type].stop; + } + + /* Set dma registers and raise an irq */ + next_state->dma[type].csr |= DMA_COMPLETE; /* DON'T CHANGE THIS! */ + + switch (type) { + case NEXTDMA_SCSI: + irq = NEXT_SCSI_DMA_I; + break; + } + + next_irq(opaque, irq, 1); + next_irq(opaque, irq, 0); +} + +static void nextscsi_read(void *opaque, uint8_t *buf, int len) +{ + DPRINTF("SCSI READ: %x\n", len); + abort(); +} + +static void nextscsi_write(void *opaque, uint8_t *buf, int size) +{ + DPRINTF("SCSI WRITE: %i\n", size); + nextdma_write(opaque, buf, size, NEXTDMA_SCSI); +} + +static void next_scsi_init(DeviceState *pcdev, M68kCPU *cpu) +{ + struct NeXTPC *next_pc = NEXT_PC(pcdev); + DeviceState *dev; + SysBusDevice *sysbusdev; + SysBusESPState *sysbus_esp; + ESPState *esp; + + dev = qdev_new(TYPE_SYSBUS_ESP); + sysbus_esp = SYSBUS_ESP(dev); + esp = &sysbus_esp->esp; + esp->dma_memory_read = nextscsi_read; + esp->dma_memory_write = nextscsi_write; + esp->dma_opaque = pcdev; + sysbus_esp->it_shift = 0; + esp->dma_enabled = 1; + sysbusdev = SYS_BUS_DEVICE(dev); + sysbus_realize_and_unref(sysbusdev, &error_fatal); + sysbus_connect_irq(sysbusdev, 0, qdev_get_gpio_in(pcdev, NEXT_SCSI_I)); + sysbus_mmio_map(sysbusdev, 0, 0x2114000); + + next_pc->scsi_reset = qdev_get_gpio_in(dev, 0); + next_pc->scsi_dma = qdev_get_gpio_in(dev, 1); + + scsi_bus_legacy_handle_cmdline(&esp->bus); +} + static void next_escc_init(DeviceState *pcdev) { DeviceState *dev; @@ -1021,6 +1122,7 @@ static void next_cube_init(MachineState *machine) /* TODO: */ /* Network */ /* SCSI */ + next_scsi_init(pcdev, cpu); /* DMA */ memory_region_init_io(dmamem, NULL, &dma_ops, machine, "next.dma", 0x5000); @@ -1033,6 +1135,7 @@ static void next_machine_class_init(ObjectClass *oc, void *data) mc->desc = "NeXT Cube"; mc->init = next_cube_init; + mc->block_default_type = IF_SCSI; mc->default_ram_size = RAM_SIZE; mc->default_ram_id = "next.ram"; mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040"); |