platforms/nexus_smc.repl

//
// Copyright (c) 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// ***************************************************
// Nexus-specific SMC
// ***************************************************

using "sim/config/platforms/smc.repl"

// Remember to update hart_is_mc in rom_crt.S if this changes.
ram_smc: @ sysbus 0x50000000
    size: 0x00400000

// SMC Specific Peripherals start at 0x54000000

// Control block for the SMC, lets us pause/restart the core at an arbitrary PC.
smc_control: @ sysbus 0x54020000
    cpu: cpu1
    pc: 0x50000000

smc_plic:
    0 -> cpu1@9
    1 -> cpu1@11
    numberOfSources: 42

uart5: @ sysbus 0x54000000

// RV_TIMER_SMC, timer for Cantrip kernel.
timer_smc: @ sysbus 0x54010000
    frequency: 2500000
    IRQ -> cpu1@5

// Timer for Cantrip software timer service.
timer_smc_sw: @ sysbus 0x54011000
    frequency: 2500000
    IRQ -> smc_plic@38

sysbus:
    init:
        Tag <0x54010000 0x1000> "OPENTITAN_EARLGREY_DEV_RV_TIMER_SMC"
        Tag <0x54030000 0x1000> "OPENTITAN_EARLGREY_DEV_RV_TIMER_SMC_SW"