16556617cSNiek Linnenbank /* 26556617cSNiek Linnenbank * Allwinner Security ID emulation 36556617cSNiek Linnenbank * 46556617cSNiek Linnenbank * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com> 56556617cSNiek Linnenbank * 66556617cSNiek Linnenbank * This program is free software: you can redistribute it and/or modify 76556617cSNiek Linnenbank * it under the terms of the GNU General Public License as published by 86556617cSNiek Linnenbank * the Free Software Foundation, either version 2 of the License, or 96556617cSNiek Linnenbank * (at your option) any later version. 106556617cSNiek Linnenbank * 116556617cSNiek Linnenbank * This program is distributed in the hope that it will be useful, 126556617cSNiek Linnenbank * but WITHOUT ANY WARRANTY; without even the implied warranty of 136556617cSNiek Linnenbank * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 146556617cSNiek Linnenbank * GNU General Public License for more details. 156556617cSNiek Linnenbank * 166556617cSNiek Linnenbank * You should have received a copy of the GNU General Public License 176556617cSNiek Linnenbank * along with this program. If not, see <http://www.gnu.org/licenses/>. 186556617cSNiek Linnenbank */ 196556617cSNiek Linnenbank 206556617cSNiek Linnenbank #include "qemu/osdep.h" 216556617cSNiek Linnenbank #include "qemu/units.h" 226556617cSNiek Linnenbank #include "hw/sysbus.h" 236556617cSNiek Linnenbank #include "migration/vmstate.h" 246556617cSNiek Linnenbank #include "qemu/log.h" 256556617cSNiek Linnenbank #include "qemu/module.h" 266556617cSNiek Linnenbank #include "qemu/guest-random.h" 276556617cSNiek Linnenbank #include "qapi/error.h" 286556617cSNiek Linnenbank #include "hw/qdev-properties.h" 29*ce35e229SEduardo Habkost #include "hw/qdev-properties-system.h" 306556617cSNiek Linnenbank #include "hw/misc/allwinner-sid.h" 316556617cSNiek Linnenbank #include "trace.h" 326556617cSNiek Linnenbank 336556617cSNiek Linnenbank /* SID register offsets */ 346556617cSNiek Linnenbank enum { 356556617cSNiek Linnenbank REG_PRCTL = 0x40, /* Control */ 366556617cSNiek Linnenbank REG_RDKEY = 0x60, /* Read Key */ 376556617cSNiek Linnenbank }; 386556617cSNiek Linnenbank 396556617cSNiek Linnenbank /* SID register flags */ 406556617cSNiek Linnenbank enum { 416556617cSNiek Linnenbank REG_PRCTL_WRITE = 0x0002, /* Unknown write flag */ 426556617cSNiek Linnenbank REG_PRCTL_OP_LOCK = 0xAC00, /* Lock operation */ 436556617cSNiek Linnenbank }; 446556617cSNiek Linnenbank 456556617cSNiek Linnenbank static uint64_t allwinner_sid_read(void *opaque, hwaddr offset, 466556617cSNiek Linnenbank unsigned size) 476556617cSNiek Linnenbank { 486556617cSNiek Linnenbank const AwSidState *s = AW_SID(opaque); 496556617cSNiek Linnenbank uint64_t val = 0; 506556617cSNiek Linnenbank 516556617cSNiek Linnenbank switch (offset) { 526556617cSNiek Linnenbank case REG_PRCTL: /* Control */ 536556617cSNiek Linnenbank val = s->control; 546556617cSNiek Linnenbank break; 556556617cSNiek Linnenbank case REG_RDKEY: /* Read Key */ 566556617cSNiek Linnenbank val = s->rdkey; 576556617cSNiek Linnenbank break; 586556617cSNiek Linnenbank default: 596556617cSNiek Linnenbank qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", 606556617cSNiek Linnenbank __func__, (uint32_t)offset); 616556617cSNiek Linnenbank return 0; 626556617cSNiek Linnenbank } 636556617cSNiek Linnenbank 646556617cSNiek Linnenbank trace_allwinner_sid_read(offset, val, size); 656556617cSNiek Linnenbank 666556617cSNiek Linnenbank return val; 676556617cSNiek Linnenbank } 686556617cSNiek Linnenbank 696556617cSNiek Linnenbank static void allwinner_sid_write(void *opaque, hwaddr offset, 706556617cSNiek Linnenbank uint64_t val, unsigned size) 716556617cSNiek Linnenbank { 726556617cSNiek Linnenbank AwSidState *s = AW_SID(opaque); 736556617cSNiek Linnenbank 746556617cSNiek Linnenbank trace_allwinner_sid_write(offset, val, size); 756556617cSNiek Linnenbank 766556617cSNiek Linnenbank switch (offset) { 776556617cSNiek Linnenbank case REG_PRCTL: /* Control */ 786556617cSNiek Linnenbank s->control = val; 796556617cSNiek Linnenbank 806556617cSNiek Linnenbank if ((s->control & REG_PRCTL_OP_LOCK) && 816556617cSNiek Linnenbank (s->control & REG_PRCTL_WRITE)) { 826556617cSNiek Linnenbank uint32_t id = s->control >> 16; 836556617cSNiek Linnenbank 846556617cSNiek Linnenbank if (id <= sizeof(QemuUUID) - sizeof(s->rdkey)) { 856556617cSNiek Linnenbank s->rdkey = ldl_be_p(&s->identifier.data[id]); 866556617cSNiek Linnenbank } 876556617cSNiek Linnenbank } 886556617cSNiek Linnenbank s->control &= ~REG_PRCTL_WRITE; 896556617cSNiek Linnenbank break; 906556617cSNiek Linnenbank case REG_RDKEY: /* Read Key */ 916556617cSNiek Linnenbank break; 926556617cSNiek Linnenbank default: 936556617cSNiek Linnenbank qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", 946556617cSNiek Linnenbank __func__, (uint32_t)offset); 956556617cSNiek Linnenbank break; 966556617cSNiek Linnenbank } 976556617cSNiek Linnenbank } 986556617cSNiek Linnenbank 996556617cSNiek Linnenbank static const MemoryRegionOps allwinner_sid_ops = { 1006556617cSNiek Linnenbank .read = allwinner_sid_read, 1016556617cSNiek Linnenbank .write = allwinner_sid_write, 1026556617cSNiek Linnenbank .endianness = DEVICE_NATIVE_ENDIAN, 1036556617cSNiek Linnenbank .valid = { 1046556617cSNiek Linnenbank .min_access_size = 4, 1056556617cSNiek Linnenbank .max_access_size = 4, 1066556617cSNiek Linnenbank }, 1076556617cSNiek Linnenbank .impl.min_access_size = 4, 1086556617cSNiek Linnenbank }; 1096556617cSNiek Linnenbank 1106556617cSNiek Linnenbank static void allwinner_sid_reset(DeviceState *dev) 1116556617cSNiek Linnenbank { 1126556617cSNiek Linnenbank AwSidState *s = AW_SID(dev); 1136556617cSNiek Linnenbank 1146556617cSNiek Linnenbank /* Set default values for registers */ 1156556617cSNiek Linnenbank s->control = 0; 1166556617cSNiek Linnenbank s->rdkey = 0; 1176556617cSNiek Linnenbank } 1186556617cSNiek Linnenbank 1196556617cSNiek Linnenbank static void allwinner_sid_init(Object *obj) 1206556617cSNiek Linnenbank { 1216556617cSNiek Linnenbank SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 1226556617cSNiek Linnenbank AwSidState *s = AW_SID(obj); 1236556617cSNiek Linnenbank 1246556617cSNiek Linnenbank /* Memory mapping */ 1256556617cSNiek Linnenbank memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sid_ops, s, 1266556617cSNiek Linnenbank TYPE_AW_SID, 1 * KiB); 1276556617cSNiek Linnenbank sysbus_init_mmio(sbd, &s->iomem); 1286556617cSNiek Linnenbank } 1296556617cSNiek Linnenbank 1306556617cSNiek Linnenbank static Property allwinner_sid_properties[] = { 1316556617cSNiek Linnenbank DEFINE_PROP_UUID_NODEFAULT("identifier", AwSidState, identifier), 1326556617cSNiek Linnenbank DEFINE_PROP_END_OF_LIST() 1336556617cSNiek Linnenbank }; 1346556617cSNiek Linnenbank 1356556617cSNiek Linnenbank static const VMStateDescription allwinner_sid_vmstate = { 1366556617cSNiek Linnenbank .name = "allwinner-sid", 1376556617cSNiek Linnenbank .version_id = 1, 1386556617cSNiek Linnenbank .minimum_version_id = 1, 1396556617cSNiek Linnenbank .fields = (VMStateField[]) { 1406556617cSNiek Linnenbank VMSTATE_UINT32(control, AwSidState), 1416556617cSNiek Linnenbank VMSTATE_UINT32(rdkey, AwSidState), 1426556617cSNiek Linnenbank VMSTATE_UINT8_ARRAY_V(identifier.data, AwSidState, sizeof(QemuUUID), 1), 1436556617cSNiek Linnenbank VMSTATE_END_OF_LIST() 1446556617cSNiek Linnenbank } 1456556617cSNiek Linnenbank }; 1466556617cSNiek Linnenbank 1476556617cSNiek Linnenbank static void allwinner_sid_class_init(ObjectClass *klass, void *data) 1486556617cSNiek Linnenbank { 1496556617cSNiek Linnenbank DeviceClass *dc = DEVICE_CLASS(klass); 1506556617cSNiek Linnenbank 1516556617cSNiek Linnenbank dc->reset = allwinner_sid_reset; 1526556617cSNiek Linnenbank dc->vmsd = &allwinner_sid_vmstate; 1536556617cSNiek Linnenbank device_class_set_props(dc, allwinner_sid_properties); 1546556617cSNiek Linnenbank } 1556556617cSNiek Linnenbank 1566556617cSNiek Linnenbank static const TypeInfo allwinner_sid_info = { 1576556617cSNiek Linnenbank .name = TYPE_AW_SID, 1586556617cSNiek Linnenbank .parent = TYPE_SYS_BUS_DEVICE, 1596556617cSNiek Linnenbank .instance_init = allwinner_sid_init, 1606556617cSNiek Linnenbank .instance_size = sizeof(AwSidState), 1616556617cSNiek Linnenbank .class_init = allwinner_sid_class_init, 1626556617cSNiek Linnenbank }; 1636556617cSNiek Linnenbank 1646556617cSNiek Linnenbank static void allwinner_sid_register(void) 1656556617cSNiek Linnenbank { 1666556617cSNiek Linnenbank type_register_static(&allwinner_sid_info); 1676556617cSNiek Linnenbank } 1686556617cSNiek Linnenbank 1696556617cSNiek Linnenbank type_init(allwinner_sid_register) 170