1*6556617cSNiek Linnenbank /* 2*6556617cSNiek Linnenbank * Allwinner Security ID emulation 3*6556617cSNiek Linnenbank * 4*6556617cSNiek Linnenbank * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com> 5*6556617cSNiek Linnenbank * 6*6556617cSNiek Linnenbank * This program is free software: you can redistribute it and/or modify 7*6556617cSNiek Linnenbank * it under the terms of the GNU General Public License as published by 8*6556617cSNiek Linnenbank * the Free Software Foundation, either version 2 of the License, or 9*6556617cSNiek Linnenbank * (at your option) any later version. 10*6556617cSNiek Linnenbank * 11*6556617cSNiek Linnenbank * This program is distributed in the hope that it will be useful, 12*6556617cSNiek Linnenbank * but WITHOUT ANY WARRANTY; without even the implied warranty of 13*6556617cSNiek Linnenbank * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14*6556617cSNiek Linnenbank * GNU General Public License for more details. 15*6556617cSNiek Linnenbank * 16*6556617cSNiek Linnenbank * You should have received a copy of the GNU General Public License 17*6556617cSNiek Linnenbank * along with this program. If not, see <http://www.gnu.org/licenses/>. 18*6556617cSNiek Linnenbank */ 19*6556617cSNiek Linnenbank 20*6556617cSNiek Linnenbank #include "qemu/osdep.h" 21*6556617cSNiek Linnenbank #include "qemu/units.h" 22*6556617cSNiek Linnenbank #include "hw/sysbus.h" 23*6556617cSNiek Linnenbank #include "migration/vmstate.h" 24*6556617cSNiek Linnenbank #include "qemu/log.h" 25*6556617cSNiek Linnenbank #include "qemu/module.h" 26*6556617cSNiek Linnenbank #include "qemu/guest-random.h" 27*6556617cSNiek Linnenbank #include "qapi/error.h" 28*6556617cSNiek Linnenbank #include "hw/qdev-properties.h" 29*6556617cSNiek Linnenbank #include "hw/misc/allwinner-sid.h" 30*6556617cSNiek Linnenbank #include "trace.h" 31*6556617cSNiek Linnenbank 32*6556617cSNiek Linnenbank /* SID register offsets */ 33*6556617cSNiek Linnenbank enum { 34*6556617cSNiek Linnenbank REG_PRCTL = 0x40, /* Control */ 35*6556617cSNiek Linnenbank REG_RDKEY = 0x60, /* Read Key */ 36*6556617cSNiek Linnenbank }; 37*6556617cSNiek Linnenbank 38*6556617cSNiek Linnenbank /* SID register flags */ 39*6556617cSNiek Linnenbank enum { 40*6556617cSNiek Linnenbank REG_PRCTL_WRITE = 0x0002, /* Unknown write flag */ 41*6556617cSNiek Linnenbank REG_PRCTL_OP_LOCK = 0xAC00, /* Lock operation */ 42*6556617cSNiek Linnenbank }; 43*6556617cSNiek Linnenbank 44*6556617cSNiek Linnenbank static uint64_t allwinner_sid_read(void *opaque, hwaddr offset, 45*6556617cSNiek Linnenbank unsigned size) 46*6556617cSNiek Linnenbank { 47*6556617cSNiek Linnenbank const AwSidState *s = AW_SID(opaque); 48*6556617cSNiek Linnenbank uint64_t val = 0; 49*6556617cSNiek Linnenbank 50*6556617cSNiek Linnenbank switch (offset) { 51*6556617cSNiek Linnenbank case REG_PRCTL: /* Control */ 52*6556617cSNiek Linnenbank val = s->control; 53*6556617cSNiek Linnenbank break; 54*6556617cSNiek Linnenbank case REG_RDKEY: /* Read Key */ 55*6556617cSNiek Linnenbank val = s->rdkey; 56*6556617cSNiek Linnenbank break; 57*6556617cSNiek Linnenbank default: 58*6556617cSNiek Linnenbank qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", 59*6556617cSNiek Linnenbank __func__, (uint32_t)offset); 60*6556617cSNiek Linnenbank return 0; 61*6556617cSNiek Linnenbank } 62*6556617cSNiek Linnenbank 63*6556617cSNiek Linnenbank trace_allwinner_sid_read(offset, val, size); 64*6556617cSNiek Linnenbank 65*6556617cSNiek Linnenbank return val; 66*6556617cSNiek Linnenbank } 67*6556617cSNiek Linnenbank 68*6556617cSNiek Linnenbank static void allwinner_sid_write(void *opaque, hwaddr offset, 69*6556617cSNiek Linnenbank uint64_t val, unsigned size) 70*6556617cSNiek Linnenbank { 71*6556617cSNiek Linnenbank AwSidState *s = AW_SID(opaque); 72*6556617cSNiek Linnenbank 73*6556617cSNiek Linnenbank trace_allwinner_sid_write(offset, val, size); 74*6556617cSNiek Linnenbank 75*6556617cSNiek Linnenbank switch (offset) { 76*6556617cSNiek Linnenbank case REG_PRCTL: /* Control */ 77*6556617cSNiek Linnenbank s->control = val; 78*6556617cSNiek Linnenbank 79*6556617cSNiek Linnenbank if ((s->control & REG_PRCTL_OP_LOCK) && 80*6556617cSNiek Linnenbank (s->control & REG_PRCTL_WRITE)) { 81*6556617cSNiek Linnenbank uint32_t id = s->control >> 16; 82*6556617cSNiek Linnenbank 83*6556617cSNiek Linnenbank if (id <= sizeof(QemuUUID) - sizeof(s->rdkey)) { 84*6556617cSNiek Linnenbank s->rdkey = ldl_be_p(&s->identifier.data[id]); 85*6556617cSNiek Linnenbank } 86*6556617cSNiek Linnenbank } 87*6556617cSNiek Linnenbank s->control &= ~REG_PRCTL_WRITE; 88*6556617cSNiek Linnenbank break; 89*6556617cSNiek Linnenbank case REG_RDKEY: /* Read Key */ 90*6556617cSNiek Linnenbank break; 91*6556617cSNiek Linnenbank default: 92*6556617cSNiek Linnenbank qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", 93*6556617cSNiek Linnenbank __func__, (uint32_t)offset); 94*6556617cSNiek Linnenbank break; 95*6556617cSNiek Linnenbank } 96*6556617cSNiek Linnenbank } 97*6556617cSNiek Linnenbank 98*6556617cSNiek Linnenbank static const MemoryRegionOps allwinner_sid_ops = { 99*6556617cSNiek Linnenbank .read = allwinner_sid_read, 100*6556617cSNiek Linnenbank .write = allwinner_sid_write, 101*6556617cSNiek Linnenbank .endianness = DEVICE_NATIVE_ENDIAN, 102*6556617cSNiek Linnenbank .valid = { 103*6556617cSNiek Linnenbank .min_access_size = 4, 104*6556617cSNiek Linnenbank .max_access_size = 4, 105*6556617cSNiek Linnenbank }, 106*6556617cSNiek Linnenbank .impl.min_access_size = 4, 107*6556617cSNiek Linnenbank }; 108*6556617cSNiek Linnenbank 109*6556617cSNiek Linnenbank static void allwinner_sid_reset(DeviceState *dev) 110*6556617cSNiek Linnenbank { 111*6556617cSNiek Linnenbank AwSidState *s = AW_SID(dev); 112*6556617cSNiek Linnenbank 113*6556617cSNiek Linnenbank /* Set default values for registers */ 114*6556617cSNiek Linnenbank s->control = 0; 115*6556617cSNiek Linnenbank s->rdkey = 0; 116*6556617cSNiek Linnenbank } 117*6556617cSNiek Linnenbank 118*6556617cSNiek Linnenbank static void allwinner_sid_init(Object *obj) 119*6556617cSNiek Linnenbank { 120*6556617cSNiek Linnenbank SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 121*6556617cSNiek Linnenbank AwSidState *s = AW_SID(obj); 122*6556617cSNiek Linnenbank 123*6556617cSNiek Linnenbank /* Memory mapping */ 124*6556617cSNiek Linnenbank memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sid_ops, s, 125*6556617cSNiek Linnenbank TYPE_AW_SID, 1 * KiB); 126*6556617cSNiek Linnenbank sysbus_init_mmio(sbd, &s->iomem); 127*6556617cSNiek Linnenbank } 128*6556617cSNiek Linnenbank 129*6556617cSNiek Linnenbank static Property allwinner_sid_properties[] = { 130*6556617cSNiek Linnenbank DEFINE_PROP_UUID_NODEFAULT("identifier", AwSidState, identifier), 131*6556617cSNiek Linnenbank DEFINE_PROP_END_OF_LIST() 132*6556617cSNiek Linnenbank }; 133*6556617cSNiek Linnenbank 134*6556617cSNiek Linnenbank static const VMStateDescription allwinner_sid_vmstate = { 135*6556617cSNiek Linnenbank .name = "allwinner-sid", 136*6556617cSNiek Linnenbank .version_id = 1, 137*6556617cSNiek Linnenbank .minimum_version_id = 1, 138*6556617cSNiek Linnenbank .fields = (VMStateField[]) { 139*6556617cSNiek Linnenbank VMSTATE_UINT32(control, AwSidState), 140*6556617cSNiek Linnenbank VMSTATE_UINT32(rdkey, AwSidState), 141*6556617cSNiek Linnenbank VMSTATE_UINT8_ARRAY_V(identifier.data, AwSidState, sizeof(QemuUUID), 1), 142*6556617cSNiek Linnenbank VMSTATE_END_OF_LIST() 143*6556617cSNiek Linnenbank } 144*6556617cSNiek Linnenbank }; 145*6556617cSNiek Linnenbank 146*6556617cSNiek Linnenbank static void allwinner_sid_class_init(ObjectClass *klass, void *data) 147*6556617cSNiek Linnenbank { 148*6556617cSNiek Linnenbank DeviceClass *dc = DEVICE_CLASS(klass); 149*6556617cSNiek Linnenbank 150*6556617cSNiek Linnenbank dc->reset = allwinner_sid_reset; 151*6556617cSNiek Linnenbank dc->vmsd = &allwinner_sid_vmstate; 152*6556617cSNiek Linnenbank device_class_set_props(dc, allwinner_sid_properties); 153*6556617cSNiek Linnenbank } 154*6556617cSNiek Linnenbank 155*6556617cSNiek Linnenbank static const TypeInfo allwinner_sid_info = { 156*6556617cSNiek Linnenbank .name = TYPE_AW_SID, 157*6556617cSNiek Linnenbank .parent = TYPE_SYS_BUS_DEVICE, 158*6556617cSNiek Linnenbank .instance_init = allwinner_sid_init, 159*6556617cSNiek Linnenbank .instance_size = sizeof(AwSidState), 160*6556617cSNiek Linnenbank .class_init = allwinner_sid_class_init, 161*6556617cSNiek Linnenbank }; 162*6556617cSNiek Linnenbank 163*6556617cSNiek Linnenbank static void allwinner_sid_register(void) 164*6556617cSNiek Linnenbank { 165*6556617cSNiek Linnenbank type_register_static(&allwinner_sid_info); 166*6556617cSNiek Linnenbank } 167*6556617cSNiek Linnenbank 168*6556617cSNiek Linnenbank type_init(allwinner_sid_register) 169