| 1 | /* |
| 2 | * djMEMC, macintosh memory and interrupt controller |
| 3 | * (Quadra 610/650/800 & Centris 610/650) |
| 4 | * |
| 5 | * https://mac68k.info/wiki/display/mac68k/djMEMC+Information |
| 6 | * |
| 7 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 8 | */ |
| 9 | |
| 10 | #include "qemu/osdep.h" |
| 11 | #include "qemu/log.h" |
| 12 | #include "migration/vmstate.h" |
| 13 | #include "hw/misc/djmemc.h" |
| 14 | #include "hw/core/qdev-properties.h" |
| 15 | #include "trace.h" |
| 16 | |
| 17 | |
| 18 | #define DJMEMC_INTERLEAVECONF 0x0 |
| 19 | #define DJMEMC_BANK0CONF 0x4 |
| 20 | #define DJMEMC_BANK1CONF 0x8 |
| 21 | #define DJMEMC_BANK2CONF 0xc |
| 22 | #define DJMEMC_BANK3CONF 0x10 |
| 23 | #define DJMEMC_BANK4CONF 0x14 |
| 24 | #define DJMEMC_BANK5CONF 0x18 |
| 25 | #define DJMEMC_BANK6CONF 0x1c |
| 26 | #define DJMEMC_BANK7CONF 0x20 |
| 27 | #define DJMEMC_BANK8CONF 0x24 |
| 28 | #define DJMEMC_BANK9CONF 0x28 |
| 29 | #define DJMEMC_MEMTOP 0x2c |
| 30 | #define DJMEMC_CONFIG 0x30 |
| 31 | #define DJMEMC_REFRESH 0x34 |
| 32 | |
| 33 | |
| 34 | static uint64_t djmemc_read(void *opaque, hwaddr addr, unsigned size) |
| 35 | { |
| 36 | DJMEMCState *s = opaque; |
| 37 | uint64_t val = 0; |
| 38 | |
| 39 | switch (addr) { |
| 40 | case DJMEMC_INTERLEAVECONF: |
| 41 | case DJMEMC_BANK0CONF ... DJMEMC_BANK9CONF: |
| 42 | case DJMEMC_MEMTOP: |
| 43 | case DJMEMC_CONFIG: |
| 44 | case DJMEMC_REFRESH: |
| 45 | val = s->regs[addr >> 2]; |
| 46 | break; |
| 47 | default: |
| 48 | qemu_log_mask(LOG_UNIMP, "djMEMC: unimplemented read addr=0x%"PRIx64 |
| 49 | " val=0x%"PRIx64 " size=%d\n", |
| 50 | addr, val, size); |
| 51 | } |
| 52 | |
| 53 | trace_djmemc_read(addr, val, size); |
| 54 | return val; |
| 55 | } |
| 56 | |
| 57 | static void djmemc_write(void *opaque, hwaddr addr, uint64_t val, |
| 58 | unsigned size) |
| 59 | { |
| 60 | DJMEMCState *s = opaque; |
| 61 | |
| 62 | trace_djmemc_write(addr, val, size); |
| 63 | |
| 64 | switch (addr) { |
| 65 | case DJMEMC_INTERLEAVECONF: |
| 66 | case DJMEMC_BANK0CONF ... DJMEMC_BANK9CONF: |
| 67 | case DJMEMC_MEMTOP: |
| 68 | case DJMEMC_CONFIG: |
| 69 | case DJMEMC_REFRESH: |
| 70 | s->regs[addr >> 2] = val; |
| 71 | break; |
| 72 | default: |
| 73 | qemu_log_mask(LOG_UNIMP, "djMEMC: unimplemented write addr=0x%"PRIx64 |
| 74 | " val=0x%"PRIx64 " size=%d\n", |
| 75 | addr, val, size); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static const MemoryRegionOps djmemc_mmio_ops = { |
| 80 | .read = djmemc_read, |
| 81 | .write = djmemc_write, |
| 82 | .impl = { |
| 83 | .min_access_size = 4, |
| 84 | .max_access_size = 4, |
| 85 | }, |
| 86 | .endianness = DEVICE_BIG_ENDIAN, |
| 87 | }; |
| 88 | |
| 89 | static void djmemc_init(Object *obj) |
| 90 | { |
| 91 | DJMEMCState *s = DJMEMC(obj); |
| 92 | SysBusDevice *sbd = SYS_BUS_DEVICE(obj); |
| 93 | |
| 94 | memory_region_init_io(&s->mem_regs, obj, &djmemc_mmio_ops, s, "djMEMC", |
| 95 | DJMEMC_SIZE); |
| 96 | sysbus_init_mmio(sbd, &s->mem_regs); |
| 97 | } |
| 98 | |
| 99 | static void djmemc_reset_hold(Object *obj, ResetType type) |
| 100 | { |
| 101 | DJMEMCState *s = DJMEMC(obj); |
| 102 | |
| 103 | memset(s->regs, 0, sizeof(s->regs)); |
| 104 | } |
| 105 | |
| 106 | static const VMStateDescription vmstate_djmemc = { |
| 107 | .name = "djMEMC", |
| 108 | .version_id = 1, |
| 109 | .minimum_version_id = 1, |
| 110 | .fields = (const VMStateField[]) { |
| 111 | VMSTATE_UINT32_ARRAY(regs, DJMEMCState, DJMEMC_NUM_REGS), |
| 112 | VMSTATE_END_OF_LIST() |
| 113 | } |
| 114 | }; |
| 115 | |
| 116 | static void djmemc_class_init(ObjectClass *oc, const void *data) |
| 117 | { |
| 118 | DeviceClass *dc = DEVICE_CLASS(oc); |
| 119 | ResettableClass *rc = RESETTABLE_CLASS(oc); |
| 120 | |
| 121 | dc->vmsd = &vmstate_djmemc; |
| 122 | rc->phases.hold = djmemc_reset_hold; |
| 123 | } |
| 124 | |
| 125 | static const TypeInfo djmemc_info_types[] = { |
| 126 | { |
| 127 | .name = TYPE_DJMEMC, |
| 128 | .parent = TYPE_SYS_BUS_DEVICE, |
| 129 | .instance_size = sizeof(DJMEMCState), |
| 130 | .instance_init = djmemc_init, |
| 131 | .class_init = djmemc_class_init, |
| 132 | }, |
| 133 | }; |
| 134 | |
| 135 | DEFINE_TYPES(djmemc_info_types) |