| 1 | /* |
| 2 | * SiFive HiFive1 AON (Always On Domain) interface. |
| 3 | * |
| 4 | * Copyright (c) 2022 SiFive, Inc. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2 or later, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along with |
| 16 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #ifndef HW_SIFIVE_AON_H |
| 20 | #define HW_SIFIVE_AON_H |
| 21 | |
| 22 | #include "hw/core/sysbus.h" |
| 23 | #include "qom/object.h" |
| 24 | |
| 25 | #define TYPE_SIFIVE_E_AON "riscv.sifive.e.aon" |
| 26 | OBJECT_DECLARE_SIMPLE_TYPE(SiFiveEAONState, SIFIVE_E_AON) |
| 27 | |
| 28 | #define SIFIVE_E_AON_WDOGKEY (0x51F15E) |
| 29 | #define SIFIVE_E_AON_WDOGFEED (0xD09F00D) |
| 30 | #define SIFIVE_E_LFCLK_DEFAULT_FREQ (32768) |
| 31 | |
| 32 | enum { |
| 33 | SIFIVE_E_AON_WDT = 0x0, |
| 34 | SIFIVE_E_AON_RTC = 0x40, |
| 35 | SIFIVE_E_AON_LFROSC = 0x70, |
| 36 | SIFIVE_E_AON_BACKUP = 0x80, |
| 37 | SIFIVE_E_AON_PMU = 0x100, |
| 38 | SIFIVE_E_AON_MAX = 0x150 |
| 39 | }; |
| 40 | |
| 41 | struct SiFiveEAONState { |
| 42 | /*< private >*/ |
| 43 | SysBusDevice parent_obj; |
| 44 | |
| 45 | /*< public >*/ |
| 46 | MemoryRegion mmio; |
| 47 | |
| 48 | /*< watchdog timer >*/ |
| 49 | QEMUTimer wdog_timer; |
| 50 | qemu_irq wdog_irq; |
| 51 | uint64_t wdog_restart_time; |
| 52 | uint64_t wdogclk_freq; |
| 53 | |
| 54 | uint32_t wdogcfg; |
| 55 | uint16_t wdogcmp0; |
| 56 | uint32_t wdogcount; |
| 57 | uint8_t wdogunlock; |
| 58 | }; |
| 59 | |
| 60 | #endif |