diff options
| author | Anup Patel <anup.patel@wdc.com> | 2022-02-20 14:25:23 +0530 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2022-03-03 13:14:50 +1000 |
| commit | 9746e583fe6ca67d9645448989535bc19adb6150 (patch) | |
| tree | 1226b4e683e1e3f1a0c205d3077e3d3dc3c5b57f /include/hw/intc | |
| parent | e6faee65855bf6d2ee480c5515f6d157c3229a38 (diff) | |
hw/intc: Add RISC-V AIA IMSIC device emulation
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>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-Id: <20220220085526.808674-3-anup@brainfault.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'include/hw/intc')
| -rw-r--r-- | include/hw/intc/riscv_imsic.h | 68 |
1 files changed, 68 insertions, 0 deletions
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 |