The SCSI CSRs are located within the SCSI subsystem of the NeXT PC (Peripheral
Contoller) which is now modelled as a separate QEMU device.
Add a new VMStateDescription for the next-scsi device to enable the SCSI CSRs
to be migrated.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>
---
hw/m68k/next-cube.c | 88 +++++++++++++++++++++++++++++++++++++++------
1 file changed, 78 insertions(+), 10 deletions(-)
diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c
index 266f57ac63..32466a425f 100644
--- a/hw/m68k/next-cube.c
+++ b/hw/m68k/next-cube.c
@@ -93,6 +93,10 @@ struct NeXTSCSI {
MemoryRegion scsi_mem;
SysBusESPState sysbus_esp;
+
+ MemoryRegion scsi_csr_mem;
+ uint8_t scsi_csr_1;
+ uint8_t scsi_csr_2;
};
#define TYPE_NEXT_PC "next-pc"
@@ -115,8 +119,6 @@ struct NeXTPC {
uint32_t led;
NeXTSCSI next_scsi;
- uint8_t scsi_csr_1;
- uint8_t scsi_csr_2;
qemu_irq scsi_reset;
qemu_irq scsi_dma;
@@ -364,6 +366,7 @@ static const MemoryRegionOps next_mmio_ops = {
static uint64_t next_scr_readfn(void *opaque, hwaddr addr, unsigned size)
{
NeXTPC *s = NEXT_PC(opaque);
+ NeXTSCSI *ns = NEXT_SCSI(&s->next_scsi);
uint64_t val;
switch (addr) {
@@ -373,12 +376,12 @@ static uint64_t next_scr_readfn(void *opaque, hwaddr
addr, unsigned size)
break;
case 0x14020:
- DPRINTF("SCSI 4020 STATUS READ %X\n", s->scsi_csr_1);
- val = s->scsi_csr_1;
+ DPRINTF("SCSI 4020 STATUS READ %X\n", ns->scsi_csr_1);
+ val = ns->scsi_csr_1;
break;
case 0x14021:
- DPRINTF("SCSI 4021 STATUS READ %X\n", s->scsi_csr_2);
+ DPRINTF("SCSI 4021 STATUS READ %X\n", ns->scsi_csr_2);
val = 0x40;
break;
@@ -411,6 +414,7 @@ static void next_scr_writefn(void *opaque, hwaddr addr,
uint64_t val,
unsigned size)
{
NeXTPC *s = NEXT_PC(opaque);
+ NeXTSCSI *ns = NEXT_SCSI(&s->next_scsi);
switch (addr) {
case 0x14108:
@@ -445,7 +449,7 @@ static void next_scr_writefn(void *opaque, hwaddr addr,
uint64_t val,
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);
+ ns->scsi_csr_1 &= ~(SCSICSR_INTMASK | 0x80 | 0x1);
qemu_irq_lower(s->scsi_reset);
}
if (val & SCSICSR_DMADIR) {
@@ -838,6 +842,54 @@ static void nextscsi_write(void *opaque, uint8_t *buf, int
size)
nextdma_write(opaque, buf, size, NEXTDMA_SCSI);
}
+static void next_scsi_csr_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned size)
+{
+ NeXTSCSI *s = NEXT_SCSI(opaque);
+
+ switch (addr) {
+ case 0:
+ s->scsi_csr_1 = val;
+ break;
+
+ case 1:
+ s->scsi_csr_2 = val;
+ break;
+
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static uint64_t next_scsi_csr_read(void *opaque, hwaddr addr, unsigned size)
+{
+ NeXTSCSI *s = NEXT_SCSI(opaque);
+ uint64_t val;
+
+ switch (addr) {
+ case 0:
+ val = s->scsi_csr_1;
+ break;
+
+ case 1:
+ val = s->scsi_csr_2;
+ break;
+
+ default:
+ g_assert_not_reached();
+ }
+
+ return val;
+}
+
+static const MemoryRegionOps next_scsi_csr_ops = {
+ .read = next_scsi_csr_read,
+ .write = next_scsi_csr_write,
+ .valid.min_access_size = 1,
+ .valid.max_access_size = 1,
+ .endianness = DEVICE_BIG_ENDIAN,
+};
+
static void next_scsi_init(Object *obj)
{
NeXTSCSI *s = NEXT_SCSI(obj);
@@ -845,6 +897,9 @@ static void next_scsi_init(Object *obj)
object_initialize_child(obj, "esp", &s->sysbus_esp, TYPE_SYSBUS_ESP);
+ memory_region_init_io(&s->scsi_csr_mem, obj, &next_scsi_csr_ops,
+ s, "csrs", 2);
+
memory_region_init(&s->scsi_mem, obj, "next.scsi", 0x40);
sysbus_init_mmio(sbd, &s->scsi_mem);
}
@@ -874,15 +929,30 @@ static void next_scsi_realize(DeviceState *dev, Error
**errp)
memory_region_add_subregion(&s->scsi_mem, 0x0,
sysbus_mmio_get_region(sbd, 0));
+ /* SCSI CSRs */
+ memory_region_add_subregion(&s->scsi_mem, 0x20, &s->scsi_csr_mem);
+
scsi_bus_legacy_handle_cmdline(&s->sysbus_esp.esp.bus);
}
+static const VMStateDescription next_scsi_vmstate = {
+ .name = "next-scsi",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (const VMStateField[]) {
+ VMSTATE_UINT8(scsi_csr_1, NeXTSCSI),
+ VMSTATE_UINT8(scsi_csr_2, NeXTSCSI),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
static void next_scsi_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "NeXT SCSI Controller";
dc->realize = next_scsi_realize;
+ dc->vmsd = &next_scsi_vmstate;
}
static const TypeInfo next_scsi_info = {
@@ -1000,8 +1070,8 @@ static const VMStateDescription next_rtc_vmstate = {
static const VMStateDescription next_pc_vmstate = {
.name = "next-pc",
- .version_id = 2,
- .minimum_version_id = 2,
+ .version_id = 3,
+ .minimum_version_id = 3,
.fields = (const VMStateField[]) {
VMSTATE_UINT32(scr1, NeXTPC),
VMSTATE_UINT32(scr2, NeXTPC),
@@ -1009,8 +1079,6 @@ static const VMStateDescription next_pc_vmstate = {
VMSTATE_UINT32(int_mask, NeXTPC),
VMSTATE_UINT32(int_status, NeXTPC),
VMSTATE_UINT32(led, NeXTPC),
- VMSTATE_UINT8(scsi_csr_1, NeXTPC),
- VMSTATE_UINT8(scsi_csr_2, NeXTPC),
VMSTATE_STRUCT(rtc, NeXTPC, 0, next_rtc_vmstate, NextRtc),
VMSTATE_END_OF_LIST()
},
--
2.39.5
