From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/hw/timer/xilinx_timer.c | 265 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 265 insertions(+) create mode 100644 qemu/hw/timer/xilinx_timer.c (limited to 'qemu/hw/timer/xilinx_timer.c') diff --git a/qemu/hw/timer/xilinx_timer.c b/qemu/hw/timer/xilinx_timer.c new file mode 100644 index 000000000..cdb335517 --- /dev/null +++ b/qemu/hw/timer/xilinx_timer.c @@ -0,0 +1,265 @@ +/* + * QEMU model of the Xilinx timer block. + * + * Copyright (c) 2009 Edgar E. Iglesias. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/sysbus.h" +#include "hw/ptimer.h" +#include "qemu/log.h" +#include "qemu/main-loop.h" + +#define D(x) + +#define R_TCSR 0 +#define R_TLR 1 +#define R_TCR 2 +#define R_MAX 4 + +#define TCSR_MDT (1<<0) +#define TCSR_UDT (1<<1) +#define TCSR_GENT (1<<2) +#define TCSR_CAPT (1<<3) +#define TCSR_ARHT (1<<4) +#define TCSR_LOAD (1<<5) +#define TCSR_ENIT (1<<6) +#define TCSR_ENT (1<<7) +#define TCSR_TINT (1<<8) +#define TCSR_PWMA (1<<9) +#define TCSR_ENALL (1<<10) + +struct xlx_timer +{ + QEMUBH *bh; + ptimer_state *ptimer; + void *parent; + int nr; /* for debug. */ + + unsigned long timer_div; + + uint32_t regs[R_MAX]; +}; + +#define TYPE_XILINX_TIMER "xlnx.xps-timer" +#define XILINX_TIMER(obj) \ + OBJECT_CHECK(struct timerblock, (obj), TYPE_XILINX_TIMER) + +struct timerblock +{ + SysBusDevice parent_obj; + + MemoryRegion mmio; + qemu_irq irq; + uint8_t one_timer_only; + uint32_t freq_hz; + struct xlx_timer *timers; +}; + +static inline unsigned int num_timers(struct timerblock *t) +{ + return 2 - t->one_timer_only; +} + +static inline unsigned int timer_from_addr(hwaddr addr) +{ + /* Timers get a 4x32bit control reg area each. */ + return addr >> 2; +} + +static void timer_update_irq(struct timerblock *t) +{ + unsigned int i, irq = 0; + uint32_t csr; + + for (i = 0; i < num_timers(t); i++) { + csr = t->timers[i].regs[R_TCSR]; + irq |= (csr & TCSR_TINT) && (csr & TCSR_ENIT); + } + + /* All timers within the same slave share a single IRQ line. */ + qemu_set_irq(t->irq, !!irq); +} + +static uint64_t +timer_read(void *opaque, hwaddr addr, unsigned int size) +{ + struct timerblock *t = opaque; + struct xlx_timer *xt; + uint32_t r = 0; + unsigned int timer; + + addr >>= 2; + timer = timer_from_addr(addr); + xt = &t->timers[timer]; + /* Further decoding to address a specific timers reg. */ + addr &= 0x3; + switch (addr) + { + case R_TCR: + r = ptimer_get_count(xt->ptimer); + if (!(xt->regs[R_TCSR] & TCSR_UDT)) + r = ~r; + D(qemu_log("xlx_timer t=%d read counter=%x udt=%d\n", + timer, r, xt->regs[R_TCSR] & TCSR_UDT)); + break; + default: + if (addr < ARRAY_SIZE(xt->regs)) + r = xt->regs[addr]; + break; + + } + D(fprintf(stderr, "%s timer=%d %x=%x\n", __func__, timer, addr * 4, r)); + return r; +} + +static void timer_enable(struct xlx_timer *xt) +{ + uint64_t count; + + D(fprintf(stderr, "%s timer=%d down=%d\n", __func__, + xt->nr, xt->regs[R_TCSR] & TCSR_UDT)); + + ptimer_stop(xt->ptimer); + + if (xt->regs[R_TCSR] & TCSR_UDT) + count = xt->regs[R_TLR]; + else + count = ~0 - xt->regs[R_TLR]; + ptimer_set_limit(xt->ptimer, count, 1); + ptimer_run(xt->ptimer, 1); +} + +static void +timer_write(void *opaque, hwaddr addr, + uint64_t val64, unsigned int size) +{ + struct timerblock *t = opaque; + struct xlx_timer *xt; + unsigned int timer; + uint32_t value = val64; + + addr >>= 2; + timer = timer_from_addr(addr); + xt = &t->timers[timer]; + D(fprintf(stderr, "%s addr=%x val=%x (timer=%d off=%d)\n", + __func__, addr * 4, value, timer, addr & 3)); + /* Further decoding to address a specific timers reg. */ + addr &= 3; + switch (addr) + { + case R_TCSR: + if (value & TCSR_TINT) + value &= ~TCSR_TINT; + + xt->regs[addr] = value & 0x7ff; + if (value & TCSR_ENT) + timer_enable(xt); + break; + + default: + if (addr < ARRAY_SIZE(xt->regs)) + xt->regs[addr] = value; + break; + } + timer_update_irq(t); +} + +static const MemoryRegionOps timer_ops = { + .read = timer_read, + .write = timer_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 4 + } +}; + +static void timer_hit(void *opaque) +{ + struct xlx_timer *xt = opaque; + struct timerblock *t = xt->parent; + D(fprintf(stderr, "%s %d\n", __func__, xt->nr)); + xt->regs[R_TCSR] |= TCSR_TINT; + + if (xt->regs[R_TCSR] & TCSR_ARHT) + timer_enable(xt); + timer_update_irq(t); +} + +static void xilinx_timer_realize(DeviceState *dev, Error **errp) +{ + struct timerblock *t = XILINX_TIMER(dev); + unsigned int i; + + /* Init all the ptimers. */ + t->timers = g_malloc0(sizeof t->timers[0] * num_timers(t)); + for (i = 0; i < num_timers(t); i++) { + struct xlx_timer *xt = &t->timers[i]; + + xt->parent = t; + xt->nr = i; + xt->bh = qemu_bh_new(timer_hit, xt); + xt->ptimer = ptimer_init(xt->bh); + ptimer_set_freq(xt->ptimer, t->freq_hz); + } + + memory_region_init_io(&t->mmio, OBJECT(t), &timer_ops, t, "xlnx.xps-timer", + R_MAX * 4 * num_timers(t)); + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &t->mmio); +} + +static void xilinx_timer_init(Object *obj) +{ + struct timerblock *t = XILINX_TIMER(obj); + + /* All timers share a single irq line. */ + sysbus_init_irq(SYS_BUS_DEVICE(obj), &t->irq); +} + +static Property xilinx_timer_properties[] = { + DEFINE_PROP_UINT32("clock-frequency", struct timerblock, freq_hz, + 62 * 1000000), + DEFINE_PROP_UINT8("one-timer-only", struct timerblock, one_timer_only, 0), + DEFINE_PROP_END_OF_LIST(), +}; + +static void xilinx_timer_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = xilinx_timer_realize; + dc->props = xilinx_timer_properties; +} + +static const TypeInfo xilinx_timer_info = { + .name = TYPE_XILINX_TIMER, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(struct timerblock), + .instance_init = xilinx_timer_init, + .class_init = xilinx_timer_class_init, +}; + +static void xilinx_timer_register_types(void) +{ + type_register_static(&xilinx_timer_info); +} + +type_init(xilinx_timer_register_types) -- cgit 1.2.3-korg