diff options
| author | Yongbok Kim <yongbok.kim@imgtec.com> | 2016-03-28 19:35:50 -0700 |
|---|---|---|
| committer | Leon Alrae <leon.alrae@imgtec.com> | 2016-07-12 09:10:09 +0100 |
| commit | 405140519f58815b422db086b7461d6c00b79b57 (patch) | |
| tree | eed6c81b93ea2de1f0e5bd9d8bc9087a0bcb4df4 /include | |
| parent | e2c8f9e44e07d8210049abaa6042ec3c956f1dd4 (diff) | |
hw/mips: implement GIC Interval Timer
The interval timer is similar to the CP0 Count/Compare timer within
each processor. The difference is the GIC_SH_COUNTER register is global
to the system so that all processors have the same time reference.
To ease implementation, all VPs are having its own QEMU timer but sharing
global settings and registers such as GIC_SH_CONFIG.COUTNSTOP and
GIC_SH_COUNTER.
MIPS GIC Interval Timer does support upto 64 bits of Count register but
in this implementation it is limited to 32 bits only.
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/timer/mips_gictimer.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/hw/timer/mips_gictimer.h b/include/hw/timer/mips_gictimer.h new file mode 100644 index 0000000000..e3ca45c533 --- /dev/null +++ b/include/hw/timer/mips_gictimer.h @@ -0,0 +1,46 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2016 Imagination Technologies + * + */ + +#ifndef _MIPS_GICTIMER_H_ +#define _MIPS_GICTIMER_H_ + +typedef struct MIPSGICTimerVPState MIPSGICTimerVPState; +typedef struct MIPSGICTimerState MIPSGICTimerState; + +typedef void MIPSGICTimerCB(void *opaque, uint32_t vp_index); + +struct MIPSGICTimerVPState { + QEMUTimer *qtimer; + uint32_t vp_index; + uint32_t comparelo; + MIPSGICTimerState *gictimer; +}; + +struct MIPSGICTimerState { + void *opaque; + uint8_t countstop; + uint32_t sh_counterlo; + int32_t num_vps; + MIPSGICTimerVPState *vptimers; + MIPSGICTimerCB *cb; +}; + +uint32_t mips_gictimer_get_sh_count(MIPSGICTimerState *gic); +void mips_gictimer_store_sh_count(MIPSGICTimerState *gic, uint64_t count); +uint32_t mips_gictimer_get_vp_compare(MIPSGICTimerState *gictimer, + uint32_t vp_index); +void mips_gictimer_store_vp_compare(MIPSGICTimerState *gic, uint32_t vp_index, + uint64_t compare); +uint8_t mips_gictimer_get_countstop(MIPSGICTimerState *gic); +void mips_gictimer_start_count(MIPSGICTimerState *gic); +void mips_gictimer_stop_count(MIPSGICTimerState *gic); +MIPSGICTimerState *mips_gictimer_init(void *opaque, uint32_t nvps, + MIPSGICTimerCB *cb); + +#endif /* _MIPS_GICTIMER_H_ */ |