Peter Maydell | 0b8ceee | 2021-02-19 14:45:45 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Arm SSE Subsystem System Timer |
| 3 | * |
| 4 | * Copyright (c) 2020 Linaro Limited |
| 5 | * Written by Peter Maydell |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 or |
| 9 | * (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * This is a model of the "System timer" which is documented in |
| 14 | * the Arm SSE-123 Example Subsystem Technical Reference Manual: |
| 15 | * https://developer.arm.com/documentation/101370/latest/ |
| 16 | * |
| 17 | * QEMU interface: |
| 18 | * + QOM property "counter": link property to be set to the |
| 19 | * TYPE_SSE_COUNTER timestamp counter device this timer runs off |
| 20 | * + sysbus MMIO region 0: the register bank |
| 21 | * + sysbus IRQ 0: timer interrupt |
| 22 | */ |
| 23 | |
| 24 | #ifndef SSE_TIMER_H |
| 25 | #define SSE_TIMER_H |
| 26 | |
| 27 | #include "hw/sysbus.h" |
| 28 | #include "qom/object.h" |
| 29 | #include "hw/timer/sse-counter.h" |
| 30 | |
| 31 | #define TYPE_SSE_TIMER "sse-timer" |
| 32 | OBJECT_DECLARE_SIMPLE_TYPE(SSETimer, SSE_TIMER) |
| 33 | |
| 34 | struct SSETimer { |
| 35 | /*< private >*/ |
| 36 | SysBusDevice parent_obj; |
| 37 | |
| 38 | /*< public >*/ |
| 39 | MemoryRegion iomem; |
| 40 | qemu_irq irq; |
| 41 | SSECounter *counter; |
| 42 | QEMUTimer timer; |
| 43 | Notifier counter_notifier; |
| 44 | |
| 45 | uint32_t cntfrq; |
| 46 | uint32_t cntp_ctl; |
| 47 | uint64_t cntp_cval; |
| 48 | uint64_t cntp_aival; |
| 49 | uint32_t cntp_aival_ctl; |
| 50 | uint32_t cntp_aival_reload; |
| 51 | }; |
| 52 | |
| 53 | #endif |