mirror of https://github.com/proxmox/mirror_qemu
103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright (C) 2024 IBM Corp.
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*
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* IBM Flexible Service Interface
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/log.h"
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#include "trace.h"
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#include "hw/fsi/fsi.h"
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#define TO_REG(x) ((x) >> 2)
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static const TypeInfo fsi_bus_info = {
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.name = TYPE_FSI_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(FSIBus),
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};
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static uint64_t fsi_slave_read(void *opaque, hwaddr addr, unsigned size)
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{
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FSISlaveState *s = FSI_SLAVE(opaque);
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int reg = TO_REG(addr);
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trace_fsi_slave_read(addr, size);
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if (reg >= FSI_SLAVE_CONTROL_NR_REGS) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: Out of bounds read: 0x%"HWADDR_PRIx" for %u\n",
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__func__, addr, size);
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return 0;
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}
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return s->regs[reg];
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}
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static void fsi_slave_write(void *opaque, hwaddr addr, uint64_t data,
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unsigned size)
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{
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FSISlaveState *s = FSI_SLAVE(opaque);
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int reg = TO_REG(addr);
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trace_fsi_slave_write(addr, size, data);
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if (reg >= FSI_SLAVE_CONTROL_NR_REGS) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: Out of bounds write: 0x%"HWADDR_PRIx" for %u\n",
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__func__, addr, size);
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return;
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}
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s->regs[reg] = data;
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}
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static const struct MemoryRegionOps fsi_slave_ops = {
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.read = fsi_slave_read,
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.write = fsi_slave_write,
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.endianness = DEVICE_BIG_ENDIAN,
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};
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static void fsi_slave_reset(DeviceState *dev)
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{
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FSISlaveState *s = FSI_SLAVE(dev);
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/* Initialize registers */
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memset(s->regs, 0, sizeof(s->regs));
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}
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static void fsi_slave_init(Object *o)
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{
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FSISlaveState *s = FSI_SLAVE(o);
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memory_region_init_io(&s->iomem, OBJECT(s), &fsi_slave_ops,
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s, TYPE_FSI_SLAVE, 0x400);
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}
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static void fsi_slave_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->bus_type = TYPE_FSI_BUS;
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dc->desc = "FSI Slave";
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dc->reset = fsi_slave_reset;
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}
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static const TypeInfo fsi_slave_info = {
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.name = TYPE_FSI_SLAVE,
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.parent = TYPE_DEVICE,
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.instance_init = fsi_slave_init,
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.instance_size = sizeof(FSISlaveState),
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.class_init = fsi_slave_class_init,
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};
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static void fsi_register_types(void)
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{
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type_register_static(&fsi_bus_info);
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type_register_static(&fsi_slave_info);
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}
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type_init(fsi_register_types);
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