e4ea952fb0
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20231221031652.119827-41-richard.henderson@linaro.org>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/*
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* QEMU IOSB emulation
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*
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* Copyright (c) 2019 Laurent Vivier
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* Copyright (c) 2022 Mark Cave-Ayland
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "migration/vmstate.h"
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#include "hw/sysbus.h"
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#include "hw/misc/iosb.h"
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#include "trace.h"
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#define IOSB_SIZE 0x2000
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#define IOSB_CONFIG 0x0
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#define IOSB_CONFIG2 0x100
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#define IOSB_SONIC_SCSI 0x200
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#define IOSB_REVISION 0x300
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#define IOSB_SCSI_RESID 0x400
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#define IOSB_BRIGHTNESS 0x500
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#define IOSB_TIMEOUT 0x600
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static uint64_t iosb_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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IOSBState *s = IOSB(opaque);
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uint64_t val = 0;
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switch (addr) {
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case IOSB_CONFIG:
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case IOSB_CONFIG2:
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case IOSB_SONIC_SCSI:
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case IOSB_REVISION:
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case IOSB_SCSI_RESID:
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case IOSB_BRIGHTNESS:
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case IOSB_TIMEOUT:
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val = s->regs[addr >> 8];
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break;
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default:
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qemu_log_mask(LOG_UNIMP, "IOSB: unimplemented read addr=0x%"PRIx64
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" val=0x%"PRIx64 " size=%d\n",
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addr, val, size);
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}
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trace_iosb_read(addr, val, size);
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return val;
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}
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static void iosb_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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IOSBState *s = IOSB(opaque);
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switch (addr) {
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case IOSB_CONFIG:
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case IOSB_CONFIG2:
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case IOSB_SONIC_SCSI:
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case IOSB_REVISION:
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case IOSB_SCSI_RESID:
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case IOSB_BRIGHTNESS:
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case IOSB_TIMEOUT:
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s->regs[addr >> 8] = val;
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break;
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default:
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qemu_log_mask(LOG_UNIMP, "IOSB: unimplemented write addr=0x%"PRIx64
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" val=0x%"PRIx64 " size=%d\n",
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addr, val, size);
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}
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trace_iosb_write(addr, val, size);
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}
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static const MemoryRegionOps iosb_mmio_ops = {
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.read = iosb_read,
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.write = iosb_write,
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.endianness = DEVICE_BIG_ENDIAN,
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};
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static void iosb_reset_hold(Object *obj)
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{
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IOSBState *s = IOSB(obj);
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memset(s->regs, 0, sizeof(s->regs));
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/* BCLK 33 MHz */
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s->regs[IOSB_CONFIG >> 8] = 1;
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}
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static void iosb_init(Object *obj)
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{
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IOSBState *s = IOSB(obj);
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SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
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memory_region_init_io(&s->mem_regs, obj, &iosb_mmio_ops, s, "IOSB",
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IOSB_SIZE);
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sysbus_init_mmio(sbd, &s->mem_regs);
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}
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static const VMStateDescription vmstate_iosb = {
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.name = "IOSB",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (const VMStateField[]) {
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VMSTATE_UINT32_ARRAY(regs, IOSBState, IOSB_REGS),
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VMSTATE_END_OF_LIST()
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}
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};
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static void iosb_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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ResettableClass *rc = RESETTABLE_CLASS(oc);
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dc->vmsd = &vmstate_iosb;
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rc->phases.hold = iosb_reset_hold;
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}
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static const TypeInfo iosb_info_types[] = {
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{
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.name = TYPE_IOSB,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(IOSBState),
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.instance_init = iosb_init,
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.class_init = iosb_class_init,
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},
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};
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DEFINE_TYPES(iosb_info_types)
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