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Re: [PATCH v6 20/23] hw/intc: Add RISC-V AIA IMSIC device emulation
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From: |
Anup Patel |
|
Subject: |
Re: [PATCH v6 20/23] hw/intc: Add RISC-V AIA IMSIC device emulation |
|
Date: |
Thu, 13 Jan 2022 17:52:14 +0530 |
On Thu, Jan 13, 2022 at 12:56 PM Frank Chang <frank.chang@sifive.com> wrote:
>
> Anup Patel <anup@brainfault.org> 於 2021年12月30日 週四 下午9:00寫道：
>>
>> From: Anup Patel <anup.patel@wdc.com>
>>
>> The RISC-V AIA (Advanced Interrupt Architecture) defines a new
>> interrupt controller for MSIs (message signal interrupts) called
>> IMSIC (Incoming Message Signal Interrupt Controller). The IMSIC
>> is per-HART device and also suppport virtualizaiton of MSIs using
>> dedicated VS-level guest interrupt files.
>>
>> This patch adds device emulation for RISC-V AIA IMSIC which
>> supports M-level, S-level, and VS-level MSIs.
>>
>> Signed-off-by: Anup Patel <anup.patel@wdc.com>
>> Signed-off-by: Anup Patel <anup@brainfault.org>
>> ---
>> hw/intc/Kconfig | 3 +
>> hw/intc/meson.build | 1 +
>> hw/intc/riscv_imsic.c | 447 ++++++++++++++++++++++++++++++++++
>> include/hw/intc/riscv_imsic.h | 68 ++++++
>> 4 files changed, 519 insertions(+)
>> create mode 100644 hw/intc/riscv_imsic.c
>> create mode 100644 include/hw/intc/riscv_imsic.h
>>
>> diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig
>> index 528e77b4a6..ec8d4cec29 100644
>> --- a/hw/intc/Kconfig
>> +++ b/hw/intc/Kconfig
>> @@ -73,6 +73,9 @@ config RISCV_ACLINT
>> config RISCV_APLIC
>> bool
>>
>> +config RISCV_IMSIC
>> + bool
>> +
>> config SIFIVE_PLIC
>> bool
>>
>> diff --git a/hw/intc/meson.build b/hw/intc/meson.build
>> index 7466024402..5caa337654 100644
>> --- a/hw/intc/meson.build
>> +++ b/hw/intc/meson.build
>> @@ -51,6 +51,7 @@ specific_ss.add(when: 'CONFIG_S390_FLIC_KVM', if_true:
>> files('s390_flic_kvm.c'))
>> specific_ss.add(when: 'CONFIG_SH_INTC', if_true: files('sh_intc.c'))
>> specific_ss.add(when: 'CONFIG_RISCV_ACLINT', if_true:
>> files('riscv_aclint.c'))
>> specific_ss.add(when: 'CONFIG_RISCV_APLIC', if_true: files('riscv_aplic.c'))
>> +specific_ss.add(when: 'CONFIG_RISCV_IMSIC', if_true: files('riscv_imsic.c'))
>> specific_ss.add(when: 'CONFIG_SIFIVE_PLIC', if_true: files('sifive_plic.c'))
>> specific_ss.add(when: 'CONFIG_XICS', if_true: files('xics.c'))
>> specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XICS'],
>> diff --git a/hw/intc/riscv_imsic.c b/hw/intc/riscv_imsic.c
>> new file mode 100644
>> index 0000000000..753fa11a9c
>> --- /dev/null
>> +++ b/hw/intc/riscv_imsic.c
>> @@ -0,0 +1,447 @@
>> +/*
>> + * RISC-V IMSIC (Incoming Message Signaled Interrupt Controller)
>> + *
>> + * Copyright (c) 2021 Western Digital Corporation or its affiliates.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms and conditions of the GNU General Public License,
>> + * version 2 or later, as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> + * more details.
>> + *
>> + * You should have received a copy of the GNU General Public License along
>> with
>> + * this program. If not, see <http://www.gnu.org/licenses/>.
>> + */
>> +
>> +#include "qemu/osdep.h"
>> +#include "qapi/error.h"
>> +#include "qemu/log.h"
>> +#include "qemu/module.h"
>> +#include "qemu/error-report.h"
>> +#include "qemu/bswap.h"
>> +#include "exec/address-spaces.h"
>> +#include "hw/sysbus.h"
>> +#include "hw/pci/msi.h"
>> +#include "hw/boards.h"
>> +#include "hw/qdev-properties.h"
>> +#include "hw/intc/riscv_imsic.h"
>> +#include "hw/irq.h"
>> +#include "target/riscv/cpu.h"
>> +#include "target/riscv/cpu_bits.h"
>> +#include "sysemu/sysemu.h"
>> +#include "migration/vmstate.h"
>> +
>> +#define IMSIC_MMIO_PAGE_LE 0x00
>> +#define IMSIC_MMIO_PAGE_BE 0x04
>> +
>> +#define IMSIC_MIN_ID ((IMSIC_EIPx_BITS * 2) - 1)
>> +#define IMSIC_MAX_ID (IMSIC_TOPEI_IID_MASK)
>> +
>> +#define IMSIC_EISTATE_PENDING (1U << 0)
>> +#define IMSIC_EISTATE_ENABLED (1U << 1)
>> +#define IMSIC_EISTATE_ENPEND (IMSIC_EISTATE_ENABLED | \
>> + IMSIC_EISTATE_PENDING)
>> +
>> +static uint32_t riscv_imsic_topei(RISCVIMSICState *imsic, uint32_t page)
>> +{
>> + uint32_t i, max_irq, base;
>> +
>> + base = page * imsic->num_irqs;
>> + max_irq = (imsic->num_irqs < imsic->eithreshold[page]) ?
>> + imsic->num_irqs : imsic->eithreshold[page];
>
>
> Do we need to exclude the case which imsic->eithreshold[page] == 0?
> The value of a *topei CSR (mtopei, stopei, or vstopei) indicates the
> interrupt file’s current
> highest-priority pending-and-enabled interrupt that also exceeds the
> priority threshold specified by
> its eithreshold register if eithreshold is not zero.
This is similar to the mistake I did with APLIC IDC. Thanks for catching.
I will fix this in next revision.
Regards,
Anup
>
>>
>> + for (i = 1; i < max_irq; i++) {
>> + if ((imsic->eistate[base + i] & IMSIC_EISTATE_ENPEND) ==
>> + IMSIC_EISTATE_ENPEND) {
>> + return (i << IMSIC_TOPEI_IID_SHIFT) | i;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void riscv_imsic_update(RISCVIMSICState *imsic, uint32_t page)
>> +{
>> + if (imsic->eidelivery[page] && riscv_imsic_topei(imsic, page)) {
>> + qemu_irq_raise(imsic->external_irqs[page]);
>> + } else {
>> + qemu_irq_lower(imsic->external_irqs[page]);
>> + }
>> +}
>> +
>> +static int riscv_imsic_eidelivery_rmw(RISCVIMSICState *imsic, uint32_t page,
>> + target_ulong *val,
>> + target_ulong new_val,
>> + target_ulong wr_mask)
>> +{
>> + target_ulong old_val = imsic->eidelivery[page];
>> +
>> + if (val) {
>> + *val = old_val;
>> + }
>> +
>> + wr_mask &= 0x1;
>> + imsic->eidelivery[page] = (old_val & ~wr_mask) | (new_val & wr_mask);
>> +
>> + riscv_imsic_update(imsic, page);
>> + return 0;
>> +}
>> +
>> +static int riscv_imsic_eithreshold_rmw(RISCVIMSICState *imsic, uint32_t
>> page,
>> + target_ulong *val,
>> + target_ulong new_val,
>> + target_ulong wr_mask)
>> +{
>> + target_ulong old_val = imsic->eithreshold[page];
>> +
>> + if (val) {
>> + *val = old_val;
>> + }
>> +
>> + wr_mask &= IMSIC_MAX_ID;
>> + imsic->eithreshold[page] = (old_val & ~wr_mask) | (new_val & wr_mask);
>> +
>> + riscv_imsic_update(imsic, page);
>> + return 0;
>> +}
>> +
>> +static int riscv_imsic_topei_rmw(RISCVIMSICState *imsic, uint32_t page,
>> + target_ulong *val, target_ulong new_val,
>> + target_ulong wr_mask)
>> +{
>> + uint32_t base, topei = riscv_imsic_topei(imsic, page);
>> +
>> + /* Read pending and enabled interrupt with highest priority */
>> + if (val) {
>> + *val = topei;
>> + }
>> +
>> + /* Writes ignore value and clear top pending interrupt */
>> + if (topei && wr_mask) {
>> + topei >>= IMSIC_TOPEI_IID_SHIFT;
>> + base = page * imsic->num_irqs;
>> + if (topei) {
>> + imsic->eistate[base + topei] &= ~IMSIC_EISTATE_PENDING;
>> + }
>> +
>> + riscv_imsic_update(imsic, page);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int riscv_imsic_eix_rmw(RISCVIMSICState *imsic,
>> + uint32_t xlen, uint32_t page,
>> + uint32_t num, bool pend, target_ulong *val,
>> + target_ulong new_val, target_ulong wr_mask)
>> +{
>> + uint32_t i, base;
>> + target_ulong mask;
>> + uint32_t state = (pend) ? IMSIC_EISTATE_PENDING : IMSIC_EISTATE_ENABLED;
>> +
>> + if (xlen != 32) {
>> + if (num & 0x1) {
>> + return -EINVAL;
>> + }
>> + num >>= 1;
>> + }
>> + if (num >= (imsic->num_irqs / xlen)) {
>> + return -EINVAL;
>> + }
>> +
>> + base = (page * imsic->num_irqs) + (num * xlen);
>> +
>> + if (val) {
>> + *val = 0;
>> + for (i = 0; i < xlen; i++) {
>> + mask = (target_ulong)1 << i;
>> + *val |= (imsic->eistate[base + i] & state) ? mask : 0;
>> + }
>> + }
>> +
>> + for (i = 0; i < xlen; i++) {
>> + /* Bit0 of eip0 and eie0 are read-only zero */
>> + if (!num && !i) {
>> + continue;
>> + }
>> +
>> + mask = (target_ulong)1 << i;
>> + if (wr_mask & mask) {
>> + if (new_val & mask) {
>> + imsic->eistate[base + i] |= state;
>> + } else {
>> + imsic->eistate[base + i] &= ~state;
>> + }
>> + }
>> + }
>> +
>> + riscv_imsic_update(imsic, page);
>> + return 0;
>> +}
>> +
>> +static int riscv_imsic_rmw(void *arg, target_ulong reg, target_ulong *val,
>> + target_ulong new_val, target_ulong wr_mask)
>> +{
>> + RISCVIMSICState *imsic = arg;
>> + uint32_t isel, priv, virt, vgein, xlen, page;
>> +
>> + priv = AIA_IREG_PRIV(reg);
>> + virt = AIA_IREG_VIRT(reg);
>> + isel = AIA_IREG_ISEL(reg);
>> + vgein = AIA_IREG_VGEIN(reg);
>> + xlen = AIA_IREG_XLEN(reg);
>> +
>> + if (imsic->mmode) {
>> + if (priv == PRV_M && !virt) {
>> + page = 0;
>> + } else {
>> + goto err;
>> + }
>> + } else {
>> + if (priv == PRV_S) {
>> + if (virt) {
>> + if (vgein && vgein < imsic->num_pages) {
>> + page = vgein;
>> + } else {
>> + goto err;
>> + }
>> + } else {
>> + page = 0;
>> + }
>> + } else {
>> + goto err;
>> + }
>> + }
>> +
>> + switch (isel) {
>> + case ISELECT_IMSIC_EIDELIVERY:
>> + return riscv_imsic_eidelivery_rmw(imsic, page, val,
>> + new_val, wr_mask);
>> + case ISELECT_IMSIC_EITHRESHOLD:
>> + return riscv_imsic_eithreshold_rmw(imsic, page, val,
>> + new_val, wr_mask);
>> + case ISELECT_IMSIC_TOPEI:
>> + return riscv_imsic_topei_rmw(imsic, page, val, new_val, wr_mask);
>> + case ISELECT_IMSIC_EIP0 ... ISELECT_IMSIC_EIP63:
>> + return riscv_imsic_eix_rmw(imsic, xlen, page,
>> + isel - ISELECT_IMSIC_EIP0,
>> + true, val, new_val, wr_mask);
>> + case ISELECT_IMSIC_EIE0 ... ISELECT_IMSIC_EIE63:
>> + return riscv_imsic_eix_rmw(imsic, xlen, page,
>> + isel - ISELECT_IMSIC_EIE0,
>> + false, val, new_val, wr_mask);
>> + default:
>> + break;
>> + };
>> +
>> +err:
>> + qemu_log_mask(LOG_GUEST_ERROR,
>> + "%s: Invalid register priv=%d virt=%d isel=%d vgein=%d\n",
>> + __func__, priv, virt, isel, vgein);
>> + return -EINVAL;
>> +}
>> +
>> +static uint64_t riscv_imsic_read(void *opaque, hwaddr addr, unsigned size)
>> +{
>> + RISCVIMSICState *imsic = opaque;
>> +
>> + /* Reads must be 4 byte words */
>> + if ((addr & 0x3) != 0) {
>> + goto err;
>> + }
>> +
>> + /* Reads cannot be out of range */
>> + if (addr > IMSIC_MMIO_SIZE(imsic->num_pages)) {
>> + goto err;
>> + }
>> +
>> + return 0;
>> +
>> +err:
>> + qemu_log_mask(LOG_GUEST_ERROR,
>> + "%s: Invalid register read 0x%" HWADDR_PRIx "\n",
>> + __func__, addr);
>> + return 0;
>> +}
>> +
>> +static void riscv_imsic_write(void *opaque, hwaddr addr, uint64_t value,
>> + unsigned size)
>> +{
>> + RISCVIMSICState *imsic = opaque;
>> + uint32_t page;
>> +
>> + /* Writes must be 4 byte words */
>> + if ((addr & 0x3) != 0) {
>> + goto err;
>> + }
>> +
>> + /* Writes cannot be out of range */
>> + if (addr > IMSIC_MMIO_SIZE(imsic->num_pages)) {
>> + goto err;
>> + }
>> +
>> + /* Writes only supported for MSI little-endian registers */
>> + page = addr >> IMSIC_MMIO_PAGE_SHIFT;
>> + if ((addr & (IMSIC_MMIO_PAGE_SZ - 1)) == IMSIC_MMIO_PAGE_LE) {
>> + if (value && (value < imsic->num_irqs)) {
>> + imsic->eistate[(page * imsic->num_irqs) + value] |=
>> + IMSIC_EISTATE_PENDING;
>> + }
>> + }
>> +
>> + /* Update CPU external interrupt status */
>> + riscv_imsic_update(imsic, page);
>> +
>> + return;
>> +
>> +err:
>> + qemu_log_mask(LOG_GUEST_ERROR,
>> + "%s: Invalid register write 0x%" HWADDR_PRIx "\n",
>> + __func__, addr);
>> +}
>> +
>> +static const MemoryRegionOps riscv_imsic_ops = {
>> + .read = riscv_imsic_read,
>> + .write = riscv_imsic_write,
>> + .endianness = DEVICE_LITTLE_ENDIAN,
>> + .valid = {
>> + .min_access_size = 4,
>> + .max_access_size = 4
>> + }
>> +};
>> +
>> +static void riscv_imsic_realize(DeviceState *dev, Error **errp)
>> +{
>> + RISCVIMSICState *imsic = RISCV_IMSIC(dev);
>> + RISCVCPU *rcpu = RISCV_CPU(qemu_get_cpu(imsic->hartid));
>> + CPUState *cpu = qemu_get_cpu(imsic->hartid);
>> + CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
>> +
>> + imsic->num_eistate = imsic->num_pages * imsic->num_irqs;
>> + imsic->eidelivery = g_new0(uint32_t, imsic->num_pages);
>> + imsic->eithreshold = g_new0(uint32_t, imsic->num_pages);
>> + imsic->eistate = g_new0(uint32_t, imsic->num_eistate);
>> +
>> + memory_region_init_io(&imsic->mmio, OBJECT(dev), &riscv_imsic_ops,
>> + imsic, TYPE_RISCV_IMSIC,
>> + IMSIC_MMIO_SIZE(imsic->num_pages));
>> + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &imsic->mmio);
>> +
>> + /* Claim the CPU interrupt to be triggered by this IMSIC */
>> + if (riscv_cpu_claim_interrupts(rcpu,
>> + (imsic->mmode) ? MIP_MEIP : MIP_SEIP) < 0) {
>> + error_report("%s already claimed",
>> + (imsic->mmode) ? "MEIP" : "SEIP");
>> + exit(1);
>> + }
>> +
>> + /* Create output IRQ lines */
>> + imsic->external_irqs = g_malloc(sizeof(qemu_irq) * imsic->num_pages);
>> + qdev_init_gpio_out(dev, imsic->external_irqs, imsic->num_pages);
>> +
>> + /* Force select AIA feature and setup CSR read-modify-write callback */
>> + if (env) {
>> + riscv_set_feature(env, RISCV_FEATURE_AIA);
>> + if (!imsic->mmode) {
>> + riscv_cpu_set_geilen(env, imsic->num_pages - 1);
>> + }
>> + riscv_cpu_set_aia_ireg_rmw_fn(env, (imsic->mmode) ? PRV_M : PRV_S,
>> + riscv_imsic_rmw, imsic);
>> + }
>> +
>> + msi_nonbroken = true;
>> +}
>> +
>> +static Property riscv_imsic_properties[] = {
>> + DEFINE_PROP_BOOL("mmode", RISCVIMSICState, mmode, 0),
>> + DEFINE_PROP_UINT32("hartid", RISCVIMSICState, hartid, 0),
>> + DEFINE_PROP_UINT32("num-pages", RISCVIMSICState, num_pages, 0),
>> + DEFINE_PROP_UINT32("num-irqs", RISCVIMSICState, num_irqs, 0),
>> + DEFINE_PROP_END_OF_LIST(),
>> +};
>> +
>> +static const VMStateDescription vmstate_riscv_imsic = {
>> + .name = "riscv_imsic",
>> + .version_id = 1,
>> + .minimum_version_id = 1,
>> + .fields = (VMStateField[]) {
>> + VMSTATE_VARRAY_UINT32(eidelivery, RISCVIMSICState,
>> + num_pages, 0,
>> + vmstate_info_uint32, uint32_t),
>> + VMSTATE_VARRAY_UINT32(eithreshold, RISCVIMSICState,
>> + num_pages, 0,
>> + vmstate_info_uint32, uint32_t),
>> + VMSTATE_VARRAY_UINT32(eistate, RISCVIMSICState,
>> + num_eistate, 0,
>> + vmstate_info_uint32, uint32_t),
>> + VMSTATE_END_OF_LIST()
>> + }
>> +};
>> +
>> +static void riscv_imsic_class_init(ObjectClass *klass, void *data)
>> +{
>> + DeviceClass *dc = DEVICE_CLASS(klass);
>> +
>> + device_class_set_props(dc, riscv_imsic_properties);
>> + dc->realize = riscv_imsic_realize;
>> + dc->vmsd = &vmstate_riscv_imsic;
>> +}
>> +
>> +static const TypeInfo riscv_imsic_info = {
>> + .name = TYPE_RISCV_IMSIC,
>> + .parent = TYPE_SYS_BUS_DEVICE,
>> + .instance_size = sizeof(RISCVIMSICState),
>> + .class_init = riscv_imsic_class_init,
>> +};
>> +
>> +static void riscv_imsic_register_types(void)
>> +{
>> + type_register_static(&riscv_imsic_info);
>> +}
>> +
>> +type_init(riscv_imsic_register_types)
>> +
>> +/*
>> + * Create IMSIC device.
>> + */
>> +DeviceState *riscv_imsic_create(hwaddr addr, uint32_t hartid, bool mmode,
>> + uint32_t num_pages, uint32_t num_ids)
>> +{
>> + DeviceState *dev = qdev_new(TYPE_RISCV_IMSIC);
>> + CPUState *cpu = qemu_get_cpu(hartid);
>> + uint32_t i;
>> +
>> + assert(!(addr & (IMSIC_MMIO_PAGE_SZ - 1)));
>> + if (mmode) {
>> + assert(num_pages == 1);
>> + } else {
>> + assert(num_pages >= 1 && num_pages <= (IRQ_LOCAL_GUEST_MAX + 1));
>> + }
>> + assert(IMSIC_MIN_ID <= num_ids);
>> + assert(num_ids <= IMSIC_MAX_ID);
>> + assert((num_ids & IMSIC_MIN_ID) == IMSIC_MIN_ID);
>> +
>> + qdev_prop_set_bit(dev, "mmode", mmode);
>> + qdev_prop_set_uint32(dev, "hartid", hartid);
>> + qdev_prop_set_uint32(dev, "num-pages", num_pages);
>> + qdev_prop_set_uint32(dev, "num-irqs", num_ids + 1);
>> +
>> + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
>> + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
>> +
>> + for (i = 0; i < num_pages; i++) {
>> + if (!i) {
>> + qdev_connect_gpio_out_named(dev, NULL, i,
>> + qdev_get_gpio_in(DEVICE(cpu),
>> + (mmode) ? IRQ_M_EXT :
>> IRQ_S_EXT));
>> + } else {
>> + qdev_connect_gpio_out_named(dev, NULL, i,
>> + qdev_get_gpio_in(DEVICE(cpu),
>> + IRQ_LOCAL_MAX + i - 1));
>> + }
>> + }
>> +
>> + return dev;
>> +}
>> diff --git a/include/hw/intc/riscv_imsic.h b/include/hw/intc/riscv_imsic.h
>> new file mode 100644
>> index 0000000000..58c2aaa8dc
>> --- /dev/null
>> +++ b/include/hw/intc/riscv_imsic.h
>> @@ -0,0 +1,68 @@
>> +/*
>> + * RISC-V IMSIC (Incoming Message Signal Interrupt Controller) interface
>> + *
>> + * Copyright (c) 2021 Western Digital Corporation or its affiliates.
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms and conditions of the GNU General Public License,
>> + * version 2 or later, as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> + * more details.
>> + *
>> + * You should have received a copy of the GNU General Public License along
>> with
>> + * this program. If not, see <http://www.gnu.org/licenses/>.
>> + */
>> +
>> +#ifndef HW_RISCV_IMSIC_H
>> +#define HW_RISCV_IMSIC_H
>> +
>> +#include "hw/sysbus.h"
>> +#include "qom/object.h"
>> +
>> +#define TYPE_RISCV_IMSIC "riscv.imsic"
>> +
>> +typedef struct RISCVIMSICState RISCVIMSICState;
>> +DECLARE_INSTANCE_CHECKER(RISCVIMSICState, RISCV_IMSIC, TYPE_RISCV_IMSIC)
>> +
>> +#define IMSIC_MMIO_PAGE_SHIFT 12
>> +#define IMSIC_MMIO_PAGE_SZ (1UL << IMSIC_MMIO_PAGE_SHIFT)
>> +#define IMSIC_MMIO_SIZE(__num_pages) ((__num_pages) * IMSIC_MMIO_PAGE_SZ)
>> +
>> +#define IMSIC_MMIO_HART_GUEST_MAX_BTIS 6
>> +#define IMSIC_MMIO_GROUP_MIN_SHIFT 24
>> +
>> +#define IMSIC_HART_NUM_GUESTS(__guest_bits) \
>> + (1U << (__guest_bits))
>> +#define IMSIC_HART_SIZE(__guest_bits) \
>> + (IMSIC_HART_NUM_GUESTS(__guest_bits) * IMSIC_MMIO_PAGE_SZ)
>> +#define IMSIC_GROUP_NUM_HARTS(__hart_bits) \
>> + (1U << (__hart_bits))
>> +#define IMSIC_GROUP_SIZE(__hart_bits, __guest_bits) \
>> + (IMSIC_GROUP_NUM_HARTS(__hart_bits) * IMSIC_HART_SIZE(__guest_bits))
>> +
>> +struct RISCVIMSICState {
>> + /*< private >*/
>> + SysBusDevice parent_obj;
>> + qemu_irq *external_irqs;
>> +
>> + /*< public >*/
>> + MemoryRegion mmio;
>> + uint32_t num_eistate;
>> + uint32_t *eidelivery;
>> + uint32_t *eithreshold;
>> + uint32_t *eistate;
>> +
>> + /* config */
>> + bool mmode;
>> + uint32_t hartid;
>> + uint32_t num_pages;
>> + uint32_t num_irqs;
>> +};
>> +
>> +DeviceState *riscv_imsic_create(hwaddr addr, uint32_t hartid, bool mmode,
>> + uint32_t num_pages, uint32_t num_ids);
>> +
>> +#endif
>> --
>> 2.25.1
>>
>>