diff options
Diffstat (limited to 'hw/xilinx_timer.c')
| -rw-r--r-- | hw/xilinx_timer.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/hw/xilinx_timer.c b/hw/xilinx_timer.c deleted file mode 100644 index 0c39cff089..0000000000 --- a/hw/xilinx_timer.c +++ /dev/null @@ -1,255 +0,0 @@ -/* - * 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" - -#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]; -}; - -struct timerblock -{ - SysBusDevice busdev; - 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; - 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 int xilinx_timer_init(SysBusDevice *dev) -{ - struct timerblock *t = FROM_SYSBUS(typeof (*t), dev); - unsigned int i; - - /* All timers share a single irq line. */ - sysbus_init_irq(dev, &t->irq); - - /* 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, &timer_ops, t, "xlnx.xps-timer", - R_MAX * 4 * num_timers(t)); - sysbus_init_mmio(dev, &t->mmio); - return 0; -} - -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); - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - - k->init = xilinx_timer_init; - dc->props = xilinx_timer_properties; -} - -static const TypeInfo xilinx_timer_info = { - .name = "xlnx.xps-timer", - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(struct timerblock), - .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) |