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/*
* djMEMC, macintosh memory and interrupt controller
* (Quadra 610/650/800 & Centris 610/650)
*
* https://mac68k.info/wiki/display/mac68k/djMEMC+Information
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "migration/vmstate.h"
#include "hw/misc/djmemc.h"
#include "hw/qdev-properties.h"
#include "trace.h"
#define DJMEMC_INTERLEAVECONF 0x0
#define DJMEMC_BANK0CONF 0x4
#define DJMEMC_BANK1CONF 0x8
#define DJMEMC_BANK2CONF 0xc
#define DJMEMC_BANK3CONF 0x10
#define DJMEMC_BANK4CONF 0x14
#define DJMEMC_BANK5CONF 0x18
#define DJMEMC_BANK6CONF 0x1c
#define DJMEMC_BANK7CONF 0x20
#define DJMEMC_BANK8CONF 0x24
#define DJMEMC_BANK9CONF 0x28
#define DJMEMC_MEMTOP 0x2c
#define DJMEMC_CONFIG 0x30
#define DJMEMC_REFRESH 0x34
static uint64_t djmemc_read(void *opaque, hwaddr addr, unsigned size)
{
DJMEMCState *s = opaque;
uint64_t val = 0;
switch (addr) {
case DJMEMC_INTERLEAVECONF:
case DJMEMC_BANK0CONF ... DJMEMC_BANK9CONF:
case DJMEMC_MEMTOP:
case DJMEMC_CONFIG:
case DJMEMC_REFRESH:
val = s->regs[addr >> 2];
break;
default:
qemu_log_mask(LOG_UNIMP, "djMEMC: unimplemented read addr=0x%"PRIx64
" val=0x%"PRIx64 " size=%d\n",
addr, val, size);
}
trace_djmemc_read(addr, val, size);
return val;
}
static void djmemc_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
DJMEMCState *s = opaque;
trace_djmemc_write(addr, val, size);
switch (addr) {
case DJMEMC_INTERLEAVECONF:
case DJMEMC_BANK0CONF ... DJMEMC_BANK9CONF:
case DJMEMC_MEMTOP:
case DJMEMC_CONFIG:
case DJMEMC_REFRESH:
s->regs[addr >> 2] = val;
break;
default:
qemu_log_mask(LOG_UNIMP, "djMEMC: unimplemented write addr=0x%"PRIx64
" val=0x%"PRIx64 " size=%d\n",
addr, val, size);
}
}
static const MemoryRegionOps djmemc_mmio_ops = {
.read = djmemc_read,
.write = djmemc_write,
.impl = {
.min_access_size = 4,
.max_access_size = 4,
},
.endianness = DEVICE_BIG_ENDIAN,
};
static void djmemc_init(Object *obj)
{
DJMEMCState *s = DJMEMC(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
memory_region_init_io(&s->mem_regs, obj, &djmemc_mmio_ops, s, "djMEMC",
DJMEMC_SIZE);
sysbus_init_mmio(sbd, &s->mem_regs);
}
static void djmemc_reset_hold(Object *obj)
{
DJMEMCState *s = DJMEMC(obj);
memset(s->regs, 0, sizeof(s->regs));
}
static const VMStateDescription vmstate_djmemc = {
.name = "djMEMC",
.version_id = 1,
.minimum_version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, DJMEMCState, DJMEMC_NUM_REGS),
VMSTATE_END_OF_LIST()
}
};
static void djmemc_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
ResettableClass *rc = RESETTABLE_CLASS(oc);
dc->vmsd = &vmstate_djmemc;
rc->phases.hold = djmemc_reset_hold;
}
static const TypeInfo djmemc_info_types[] = {
{
.name = TYPE_DJMEMC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(DJMEMCState),
.instance_init = djmemc_init,
.class_init = djmemc_class_init,
},
};
DEFINE_TYPES(djmemc_info_types)
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