diff options
Diffstat (limited to 'qemu/hw/timer/arm_mptimer.c')
-rw-r--r-- | qemu/hw/timer/arm_mptimer.c | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/qemu/hw/timer/arm_mptimer.c b/qemu/hw/timer/arm_mptimer.c deleted file mode 100644 index d66bbf01b..000000000 --- a/qemu/hw/timer/arm_mptimer.c +++ /dev/null @@ -1,303 +0,0 @@ -/* - * Private peripheral timer/watchdog blocks for ARM 11MPCore and A9MP - * - * Copyright (c) 2006-2007 CodeSourcery. - * Copyright (c) 2011 Linaro Limited - * Written by Paul Brook, Peter Maydell - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that 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/>. - */ - -#include "qemu/osdep.h" -#include "hw/timer/arm_mptimer.h" -#include "qapi/error.h" -#include "qemu/timer.h" -#include "qom/cpu.h" - -/* This device implements the per-cpu private timer and watchdog block - * which is used in both the ARM11MPCore and Cortex-A9MP. - */ - -static inline int get_current_cpu(ARMMPTimerState *s) -{ - if (current_cpu->cpu_index >= s->num_cpu) { - hw_error("arm_mptimer: num-cpu %d but this cpu is %d!\n", - s->num_cpu, current_cpu->cpu_index); - } - return current_cpu->cpu_index; -} - -static inline void timerblock_update_irq(TimerBlock *tb) -{ - qemu_set_irq(tb->irq, tb->status && (tb->control & 4)); -} - -/* Return conversion factor from mpcore timer ticks to qemu timer ticks. */ -static inline uint32_t timerblock_scale(TimerBlock *tb) -{ - return (((tb->control >> 8) & 0xff) + 1) * 10; -} - -static void timerblock_reload(TimerBlock *tb, int restart) -{ - if (tb->count == 0) { - return; - } - if (restart) { - tb->tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - } - tb->tick += (int64_t)tb->count * timerblock_scale(tb); - timer_mod(tb->timer, tb->tick); -} - -static void timerblock_tick(void *opaque) -{ - TimerBlock *tb = (TimerBlock *)opaque; - tb->status = 1; - if (tb->control & 2) { - tb->count = tb->load; - timerblock_reload(tb, 0); - } else { - tb->count = 0; - } - timerblock_update_irq(tb); -} - -static uint64_t timerblock_read(void *opaque, hwaddr addr, - unsigned size) -{ - TimerBlock *tb = (TimerBlock *)opaque; - int64_t val; - switch (addr) { - case 0: /* Load */ - return tb->load; - case 4: /* Counter. */ - if (((tb->control & 1) == 0) || (tb->count == 0)) { - return 0; - } - /* Slow and ugly, but hopefully won't happen too often. */ - val = tb->tick - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - val /= timerblock_scale(tb); - if (val < 0) { - val = 0; - } - return val; - case 8: /* Control. */ - return tb->control; - case 12: /* Interrupt status. */ - return tb->status; - default: - return 0; - } -} - -static void timerblock_write(void *opaque, hwaddr addr, - uint64_t value, unsigned size) -{ - TimerBlock *tb = (TimerBlock *)opaque; - int64_t old; - switch (addr) { - case 0: /* Load */ - tb->load = value; - /* Fall through. */ - case 4: /* Counter. */ - if ((tb->control & 1) && tb->count) { - /* Cancel the previous timer. */ - timer_del(tb->timer); - } - tb->count = value; - if (tb->control & 1) { - timerblock_reload(tb, 1); - } - break; - case 8: /* Control. */ - old = tb->control; - tb->control = value; - if (value & 1) { - if ((old & 1) && (tb->count != 0)) { - /* Do nothing if timer is ticking right now. */ - break; - } - if (tb->control & 2) { - tb->count = tb->load; - } - timerblock_reload(tb, 1); - } else if (old & 1) { - /* Shutdown the timer. */ - timer_del(tb->timer); - } - break; - case 12: /* Interrupt status. */ - tb->status &= ~value; - timerblock_update_irq(tb); - break; - } -} - -/* Wrapper functions to implement the "read timer/watchdog for - * the current CPU" memory regions. - */ -static uint64_t arm_thistimer_read(void *opaque, hwaddr addr, - unsigned size) -{ - ARMMPTimerState *s = (ARMMPTimerState *)opaque; - int id = get_current_cpu(s); - return timerblock_read(&s->timerblock[id], addr, size); -} - -static void arm_thistimer_write(void *opaque, hwaddr addr, - uint64_t value, unsigned size) -{ - ARMMPTimerState *s = (ARMMPTimerState *)opaque; - int id = get_current_cpu(s); - timerblock_write(&s->timerblock[id], addr, value, size); -} - -static const MemoryRegionOps arm_thistimer_ops = { - .read = arm_thistimer_read, - .write = arm_thistimer_write, - .valid = { - .min_access_size = 4, - .max_access_size = 4, - }, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static const MemoryRegionOps timerblock_ops = { - .read = timerblock_read, - .write = timerblock_write, - .valid = { - .min_access_size = 4, - .max_access_size = 4, - }, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static void timerblock_reset(TimerBlock *tb) -{ - tb->count = 0; - tb->load = 0; - tb->control = 0; - tb->status = 0; - tb->tick = 0; - if (tb->timer) { - timer_del(tb->timer); - } -} - -static void arm_mptimer_reset(DeviceState *dev) -{ - ARMMPTimerState *s = ARM_MPTIMER(dev); - int i; - - for (i = 0; i < ARRAY_SIZE(s->timerblock); i++) { - timerblock_reset(&s->timerblock[i]); - } -} - -static void arm_mptimer_init(Object *obj) -{ - ARMMPTimerState *s = ARM_MPTIMER(obj); - - memory_region_init_io(&s->iomem, obj, &arm_thistimer_ops, s, - "arm_mptimer_timer", 0x20); - sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem); -} - -static void arm_mptimer_realize(DeviceState *dev, Error **errp) -{ - SysBusDevice *sbd = SYS_BUS_DEVICE(dev); - ARMMPTimerState *s = ARM_MPTIMER(dev); - int i; - - if (s->num_cpu < 1 || s->num_cpu > ARM_MPTIMER_MAX_CPUS) { - error_setg(errp, "num-cpu must be between 1 and %d", - ARM_MPTIMER_MAX_CPUS); - return; - } - /* We implement one timer block per CPU, and expose multiple MMIO regions: - * * region 0 is "timer for this core" - * * region 1 is "timer for core 0" - * * region 2 is "timer for core 1" - * and so on. - * The outgoing interrupt lines are - * * timer for core 0 - * * timer for core 1 - * and so on. - */ - for (i = 0; i < s->num_cpu; i++) { - TimerBlock *tb = &s->timerblock[i]; - tb->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, timerblock_tick, tb); - sysbus_init_irq(sbd, &tb->irq); - memory_region_init_io(&tb->iomem, OBJECT(s), &timerblock_ops, tb, - "arm_mptimer_timerblock", 0x20); - sysbus_init_mmio(sbd, &tb->iomem); - } -} - -static const VMStateDescription vmstate_timerblock = { - .name = "arm_mptimer_timerblock", - .version_id = 2, - .minimum_version_id = 2, - .fields = (VMStateField[]) { - VMSTATE_UINT32(count, TimerBlock), - VMSTATE_UINT32(load, TimerBlock), - VMSTATE_UINT32(control, TimerBlock), - VMSTATE_UINT32(status, TimerBlock), - VMSTATE_INT64(tick, TimerBlock), - VMSTATE_TIMER_PTR(timer, TimerBlock), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_arm_mptimer = { - .name = "arm_mptimer", - .version_id = 2, - .minimum_version_id = 2, - .fields = (VMStateField[]) { - VMSTATE_STRUCT_VARRAY_UINT32(timerblock, ARMMPTimerState, num_cpu, - 2, vmstate_timerblock, TimerBlock), - VMSTATE_END_OF_LIST() - } -}; - -static Property arm_mptimer_properties[] = { - DEFINE_PROP_UINT32("num-cpu", ARMMPTimerState, num_cpu, 0), - DEFINE_PROP_END_OF_LIST() -}; - -static void arm_mptimer_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - - dc->realize = arm_mptimer_realize; - dc->vmsd = &vmstate_arm_mptimer; - dc->reset = arm_mptimer_reset; - dc->props = arm_mptimer_properties; -} - -static const TypeInfo arm_mptimer_info = { - .name = TYPE_ARM_MPTIMER, - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(ARMMPTimerState), - .instance_init = arm_mptimer_init, - .class_init = arm_mptimer_class_init, -}; - -static void arm_mptimer_register_types(void) -{ - type_register_static(&arm_mptimer_info); -} - -type_init(arm_mptimer_register_types) |