diff options
| author | Tommy Wu <tommy.wu@sifive.com> | 2023-06-27 07:12:14 -0700 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2023-07-10 22:29:14 +1000 |
| commit | bf01a04f5fbb4c22ac861a76fdc4c7a74247e44b (patch) | |
| tree | 7e669b719b602d2e8765f202eb08626740331480 /include/hw | |
| parent | 11b937b65256537cff74fe731a96465f8d0c2d88 (diff) | |
hw/misc: sifive_e_aon: Support the watchdog timer of HiFive 1 rev b.
The watchdog timer is in the always-on domain device of HiFive 1 rev b,
so this patch added the AON device to the sifive_e machine. This patch
only implemented the functionality of the watchdog timer.
Signed-off-by: Tommy Wu <tommy.wu@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230627141216.3962299-2-tommy.wu@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/misc/sifive_e_aon.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/hw/misc/sifive_e_aon.h b/include/hw/misc/sifive_e_aon.h new file mode 100644 index 0000000000..2ae1c4139c --- /dev/null +++ b/include/hw/misc/sifive_e_aon.h @@ -0,0 +1,60 @@ +/* + * SiFive HiFive1 AON (Always On Domain) interface. + * + * Copyright (c) 2022 SiFive, Inc. All rights reserved. + * + * 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_SIFIVE_AON_H +#define HW_SIFIVE_AON_H + +#include "hw/sysbus.h" +#include "qom/object.h" + +#define TYPE_SIFIVE_E_AON "riscv.sifive.e.aon" +OBJECT_DECLARE_SIMPLE_TYPE(SiFiveEAONState, SIFIVE_E_AON) + +#define SIFIVE_E_AON_WDOGKEY (0x51F15E) +#define SIFIVE_E_AON_WDOGFEED (0xD09F00D) +#define SIFIVE_E_LFCLK_DEFAULT_FREQ (32768) + +enum { + SIFIVE_E_AON_WDT = 0x0, + SIFIVE_E_AON_RTC = 0x40, + SIFIVE_E_AON_LFROSC = 0x70, + SIFIVE_E_AON_BACKUP = 0x80, + SIFIVE_E_AON_PMU = 0x100, + SIFIVE_E_AON_MAX = 0x150 +}; + +struct SiFiveEAONState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion mmio; + + /*< watchdog timer >*/ + QEMUTimer *wdog_timer; + qemu_irq wdog_irq; + uint64_t wdog_restart_time; + uint64_t wdogclk_freq; + + uint32_t wdogcfg; + uint16_t wdogcmp0; + uint32_t wdogcount; + uint8_t wdogunlock; +}; + +#endif |