xref: /openbmc/qemu/hw/misc/sifive_test.c (revision 2b74dd91)
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 #include "sysemu/sysemu.h"
29 
30 static uint64_t sifive_test_read(void *opaque, hwaddr addr, unsigned int size)
31 {
32     return 0;
33 }
34 
35 static void sifive_test_write(void *opaque, hwaddr addr,
36            uint64_t val64, unsigned int size)
37 {
38     if (addr == 0) {
39         int status = val64 & 0xffff;
40         int code = (val64 >> 16) & 0xffff;
41         switch (status) {
42         case FINISHER_FAIL:
43             qemu_system_shutdown_request_with_code(
44                 SHUTDOWN_CAUSE_GUEST_PANIC, code);
45             return;
46         case FINISHER_PASS:
47             qemu_system_shutdown_request_with_code(
48                 SHUTDOWN_CAUSE_GUEST_SHUTDOWN, code);
49             return;
50         case FINISHER_RESET:
51             qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
52             return;
53         default:
54             break;
55         }
56     }
57     qemu_log_mask(LOG_GUEST_ERROR, "%s: write: addr=0x%x val=0x%016" PRIx64 "\n",
58                   __func__, (int)addr, val64);
59 }
60 
61 static const MemoryRegionOps sifive_test_ops = {
62     .read = sifive_test_read,
63     .write = sifive_test_write,
64     .endianness = DEVICE_NATIVE_ENDIAN,
65     .valid = {
66         .min_access_size = 2,
67         .max_access_size = 4
68     }
69 };
70 
71 static void sifive_test_init(Object *obj)
72 {
73     SiFiveTestState *s = SIFIVE_TEST(obj);
74 
75     memory_region_init_io(&s->mmio, obj, &sifive_test_ops, s,
76                           TYPE_SIFIVE_TEST, 0x1000);
77     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
78 }
79 
80 static const TypeInfo sifive_test_info = {
81     .name          = TYPE_SIFIVE_TEST,
82     .parent        = TYPE_SYS_BUS_DEVICE,
83     .instance_size = sizeof(SiFiveTestState),
84     .instance_init = sifive_test_init,
85 };
86 
87 static void sifive_test_register_types(void)
88 {
89     type_register_static(&sifive_test_info);
90 }
91 
92 type_init(sifive_test_register_types)
93 
94 
95 /*
96  * Create Test device.
97  */
98 DeviceState *sifive_test_create(hwaddr addr)
99 {
100     DeviceState *dev = qdev_new(TYPE_SIFIVE_TEST);
101     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
102     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
103     return dev;
104 }
105