LXR qemu/hw/misc/sifive

   1/*
   2 * QEMU SiFive Test Finisher
   3 *
   4 * Copyright (c) 2018 SiFive, Inc.
   5 *
   6 * Test finisher memory mapped device used to exit simulation
   7 *
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms and conditions of the GNU General Public License,
  10 * version 2 or later, as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope it will be useful, but WITHOUT
  13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15 * more details.
  16 *
  17 * You should have received a copy of the GNU General Public License along with
  18 * this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "hw/sysbus.h"
  23#include "qapi/error.h"
  24#include "qemu/log.h"
  25#include "qemu/module.h"
  26#include "sysemu/runstate.h"
  27#include "hw/misc/sifive_test.h"
  28
  29static uint64_t sifive_test_read(void *opaque, hwaddr addr, unsigned int size)
  30{
  31    return 0;
  32}
  33
  34static void sifive_test_write(void *opaque, hwaddr addr,
  35           uint64_t val64, unsigned int size)
  36{
  37    if (addr == 0) {
  38        int status = val64 & 0xffff;
  39        int code = (val64 >> 16) & 0xffff;
  40        switch (status) {
  41        case FINISHER_FAIL:
  42            exit(code);
  43        case FINISHER_PASS:
  44            exit(0);
  45        case FINISHER_RESET:
  46            qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
  47            return;
  48        default:
  49            break;
  50        }
  51    }
  52    qemu_log_mask(LOG_GUEST_ERROR, "%s: write: addr=0x%x val=0x%016" PRIx64 "\n",
  53                  __func__, (int)addr, val64);
  54}
  55
  56static const MemoryRegionOps sifive_test_ops = {
  57    .read = sifive_test_read,
  58    .write = sifive_test_write,
  59    .endianness = DEVICE_NATIVE_ENDIAN,
  60    .valid = {
  61        .min_access_size = 2,
  62        .max_access_size = 4
  63    }
  64};
  65
  66static void sifive_test_init(Object *obj)
  67{
  68    SiFiveTestState *s = SIFIVE_TEST(obj);
  69
  70    memory_region_init_io(&s->mmio, obj, &sifive_test_ops, s,
  71                          TYPE_SIFIVE_TEST, 0x1000);
  72    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
  73}
  74
  75static const TypeInfo sifive_test_info = {
  76    .name          = TYPE_SIFIVE_TEST,
  77    .parent        = TYPE_SYS_BUS_DEVICE,
  78    .instance_size = sizeof(SiFiveTestState),
  79    .instance_init = sifive_test_init,
  80};
  81
  82static void sifive_test_register_types(void)
  83{
  84    type_register_static(&sifive_test_info);
  85}
  86
  87type_init(sifive_test_register_types)
  88
  89
  90/*
  91 * Create Test device.
  92 */
  93DeviceState *sifive_test_create(hwaddr addr)
  94{
  95    DeviceState *dev = qdev_new(TYPE_SIFIVE_TEST);
  96    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  97    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
  98    return dev;
  99}
 100