From 1e24429e40df81270012538851c75e30c53eec21 Mon Sep 17 00:00:00 2001 From: Michael Clark Date: Sat, 3 Mar 2018 01:31:13 +1300 Subject: SiFive RISC-V PLIC Block The PLIC (Platform Level Interrupt Controller) device provides a parameterizable interrupt controller based on SiFive's PLIC specification. Acked-by: Richard Henderson Signed-off-by: Stefan O'Rear Signed-off-by: Palmer Dabbelt Signed-off-by: Michael Clark --- include/hw/riscv/sifive_plic.h | 85 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 include/hw/riscv/sifive_plic.h (limited to 'include') diff --git a/include/hw/riscv/sifive_plic.h b/include/hw/riscv/sifive_plic.h new file mode 100644 index 0000000000..11a5a98df1 --- /dev/null +++ b/include/hw/riscv/sifive_plic.h @@ -0,0 +1,85 @@ +/* + * SiFive PLIC (Platform Level Interrupt Controller) interface + * + * Copyright (c) 2017 SiFive, Inc. + * + * This provides a RISC-V PLIC device + * + * 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 . + */ + +#ifndef HW_SIFIVE_PLIC_H +#define HW_SIFIVE_PLIC_H + +#include "hw/irq.h" + +#define TYPE_SIFIVE_PLIC "riscv.sifive.plic" + +#define SIFIVE_PLIC(obj) \ + OBJECT_CHECK(SiFivePLICState, (obj), TYPE_SIFIVE_PLIC) + +typedef enum PLICMode { + PLICMode_U, + PLICMode_S, + PLICMode_H, + PLICMode_M +} PLICMode; + +typedef struct PLICAddr { + uint32_t addrid; + uint32_t hartid; + PLICMode mode; +} PLICAddr; + +typedef struct SiFivePLICState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion mmio; + uint32_t num_addrs; + uint32_t bitfield_words; + PLICAddr *addr_config; + uint32_t *source_priority; + uint32_t *target_priority; + uint32_t *pending; + uint32_t *claimed; + uint32_t *enable; + QemuMutex lock; + qemu_irq *irqs; + + /* config */ + char *hart_config; + uint32_t num_sources; + uint32_t num_priorities; + uint32_t priority_base; + uint32_t pending_base; + uint32_t enable_base; + uint32_t enable_stride; + uint32_t context_base; + uint32_t context_stride; + uint32_t aperture_size; +} SiFivePLICState; + +void sifive_plic_raise_irq(SiFivePLICState *plic, uint32_t irq); +void sifive_plic_lower_irq(SiFivePLICState *plic, uint32_t irq); + +DeviceState *sifive_plic_create(hwaddr addr, char *hart_config, + uint32_t num_sources, uint32_t num_priorities, + uint32_t priority_base, uint32_t pending_base, + uint32_t enable_base, uint32_t enable_stride, + uint32_t context_base, uint32_t context_stride, + uint32_t aperture_size); + +#endif + -- cgit v1.2.3