2 * ARM TrustZone peripheral protection controller emulation
4 * Copyright (c) 2018 Linaro Limited
5 * Written by Peter Maydell
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 or
9 * (at your option) any later version.
12 #include "qemu/osdep.h"
14 #include "qemu/module.h"
15 #include "qapi/error.h"
17 #include "hw/sysbus.h"
18 #include "migration/vmstate.h"
19 #include "hw/registerfields.h"
21 #include "hw/misc/tz-ppc.h"
22 #include "hw/qdev-properties.h"
24 static void tz_ppc_update_irq(TZPPC *s)
26 bool level = s->irq_status && s->irq_enable;
28 trace_tz_ppc_update_irq(level);
29 qemu_set_irq(s->irq, level);
32 static void tz_ppc_cfg_nonsec(void *opaque, int n, int level)
34 TZPPC *s = TZ_PPC(opaque);
36 assert(n < TZ_NUM_PORTS);
37 trace_tz_ppc_cfg_nonsec(n, level);
38 s->cfg_nonsec[n] = level;
41 static void tz_ppc_cfg_ap(void *opaque, int n, int level)
43 TZPPC *s = TZ_PPC(opaque);
45 assert(n < TZ_NUM_PORTS);
46 trace_tz_ppc_cfg_ap(n, level);
50 static void tz_ppc_cfg_sec_resp(void *opaque, int n, int level)
52 TZPPC *s = TZ_PPC(opaque);
54 trace_tz_ppc_cfg_sec_resp(level);
55 s->cfg_sec_resp = level;
58 static void tz_ppc_irq_enable(void *opaque, int n, int level)
60 TZPPC *s = TZ_PPC(opaque);
62 trace_tz_ppc_irq_enable(level);
63 s->irq_enable = level;
67 static void tz_ppc_irq_clear(void *opaque, int n, int level)
69 TZPPC *s = TZ_PPC(opaque);
71 trace_tz_ppc_irq_clear(level);
75 s->irq_status = false;
80 static bool tz_ppc_check(TZPPC *s, int n, MemTxAttrs attrs)
82 /* Check whether to allow an access to port n; return true if
83 * the check passes, and false if the transaction must be blocked.
84 * If the latter, the caller must check cfg_sec_resp to determine
85 * whether to abort or RAZ/WI the transaction.
87 * + nonsec_mask suppresses any check of the secure attribute
88 * + otherwise, block if cfg_nonsec is 1 and transaction is secure,
89 * or if cfg_nonsec is 0 and transaction is non-secure
90 * + block if transaction is usermode and cfg_ap is 0
92 if ((attrs.secure == s->cfg_nonsec[n] && !(s->nonsec_mask & (1 << n))) ||
93 (attrs.user && !s->cfg_ap[n])) {
94 /* Block the transaction. */
96 /* Note that holding irq_clear high suppresses interrupts */
105 static MemTxResult tz_ppc_read(void *opaque, hwaddr addr, uint64_t *pdata,
106 unsigned size, MemTxAttrs attrs)
108 TZPPCPort *p = opaque;
111 AddressSpace *as = &p->downstream_as;
115 if (!tz_ppc_check(s, n, attrs)) {
116 trace_tz_ppc_read_blocked(n, addr, attrs.secure, attrs.user);
117 if (s->cfg_sec_resp) {
127 data = address_space_ldub(as, addr, attrs, &res);
130 data = address_space_lduw_le(as, addr, attrs, &res);
133 data = address_space_ldl_le(as, addr, attrs, &res);
136 data = address_space_ldq_le(as, addr, attrs, &res);
139 g_assert_not_reached();
145 static MemTxResult tz_ppc_write(void *opaque, hwaddr addr, uint64_t val,
146 unsigned size, MemTxAttrs attrs)
148 TZPPCPort *p = opaque;
150 AddressSpace *as = &p->downstream_as;
154 if (!tz_ppc_check(s, n, attrs)) {
155 trace_tz_ppc_write_blocked(n, addr, attrs.secure, attrs.user);
156 if (s->cfg_sec_resp) {
165 address_space_stb(as, addr, val, attrs, &res);
168 address_space_stw_le(as, addr, val, attrs, &res);
171 address_space_stl_le(as, addr, val, attrs, &res);
174 address_space_stq_le(as, addr, val, attrs, &res);
177 g_assert_not_reached();
182 static const MemoryRegionOps tz_ppc_ops = {
183 .read_with_attrs = tz_ppc_read,
184 .write_with_attrs = tz_ppc_write,
185 .endianness = DEVICE_LITTLE_ENDIAN,
188 static bool tz_ppc_dummy_accepts(void *opaque, hwaddr addr,
189 unsigned size, bool is_write,
193 * Board code should never map the upstream end of an unused port,
194 * so we should never try to make a memory access to it.
196 g_assert_not_reached();
199 static const MemoryRegionOps tz_ppc_dummy_ops = {
200 .valid.accepts = tz_ppc_dummy_accepts,
203 static void tz_ppc_reset(DeviceState *dev)
205 TZPPC *s = TZ_PPC(dev);
207 trace_tz_ppc_reset();
208 s->cfg_sec_resp = false;
209 memset(s->cfg_nonsec, 0, sizeof(s->cfg_nonsec));
210 memset(s->cfg_ap, 0, sizeof(s->cfg_ap));
213 static void tz_ppc_init(Object *obj)
215 DeviceState *dev = DEVICE(obj);
216 TZPPC *s = TZ_PPC(obj);
218 qdev_init_gpio_in_named(dev, tz_ppc_cfg_nonsec, "cfg_nonsec", TZ_NUM_PORTS);
219 qdev_init_gpio_in_named(dev, tz_ppc_cfg_ap, "cfg_ap", TZ_NUM_PORTS);
220 qdev_init_gpio_in_named(dev, tz_ppc_cfg_sec_resp, "cfg_sec_resp", 1);
221 qdev_init_gpio_in_named(dev, tz_ppc_irq_enable, "irq_enable", 1);
222 qdev_init_gpio_in_named(dev, tz_ppc_irq_clear, "irq_clear", 1);
223 qdev_init_gpio_out_named(dev, &s->irq, "irq", 1);
226 static void tz_ppc_realize(DeviceState *dev, Error **errp)
228 Object *obj = OBJECT(dev);
229 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
230 TZPPC *s = TZ_PPC(dev);
234 /* We can't create the upstream end of the port until realize,
235 * as we don't know the size of the MR used as the downstream until then.
237 for (i = 0; i < TZ_NUM_PORTS; i++) {
238 if (s->port[i].downstream) {
243 for (i = 0; i <= max_port; i++) {
244 TZPPCPort *port = &s->port[i];
248 if (!port->downstream) {
250 * Create dummy sysbus MMIO region so the sysbus region
251 * numbering doesn't get out of sync with the port numbers.
252 * The size is entirely arbitrary.
254 name = g_strdup_printf("tz-ppc-dummy-port[%d]", i);
255 memory_region_init_io(&port->upstream, obj, &tz_ppc_dummy_ops,
256 port, name, 0x10000);
257 sysbus_init_mmio(sbd, &port->upstream);
262 name = g_strdup_printf("tz-ppc-port[%d]", i);
265 address_space_init(&port->downstream_as, port->downstream, name);
267 size = memory_region_size(port->downstream);
268 memory_region_init_io(&port->upstream, obj, &tz_ppc_ops,
270 sysbus_init_mmio(sbd, &port->upstream);
275 static const VMStateDescription tz_ppc_vmstate = {
278 .minimum_version_id = 1,
279 .fields = (VMStateField[]) {
280 VMSTATE_BOOL_ARRAY(cfg_nonsec, TZPPC, 16),
281 VMSTATE_BOOL_ARRAY(cfg_ap, TZPPC, 16),
282 VMSTATE_BOOL(cfg_sec_resp, TZPPC),
283 VMSTATE_BOOL(irq_enable, TZPPC),
284 VMSTATE_BOOL(irq_clear, TZPPC),
285 VMSTATE_BOOL(irq_status, TZPPC),
286 VMSTATE_END_OF_LIST()
290 #define DEFINE_PORT(N) \
291 DEFINE_PROP_LINK("port[" #N "]", TZPPC, port[N].downstream, \
292 TYPE_MEMORY_REGION, MemoryRegion *)
294 static Property tz_ppc_properties[] = {
295 DEFINE_PROP_UINT32("NONSEC_MASK", TZPPC, nonsec_mask, 0),
312 DEFINE_PROP_END_OF_LIST(),
315 static void tz_ppc_class_init(ObjectClass *klass, void *data)
317 DeviceClass *dc = DEVICE_CLASS(klass);
319 dc->realize = tz_ppc_realize;
320 dc->vmsd = &tz_ppc_vmstate;
321 dc->reset = tz_ppc_reset;
322 device_class_set_props(dc, tz_ppc_properties);
325 static const TypeInfo tz_ppc_info = {
327 .parent = TYPE_SYS_BUS_DEVICE,
328 .instance_size = sizeof(TZPPC),
329 .instance_init = tz_ppc_init,
330 .class_init = tz_ppc_class_init,
333 static void tz_ppc_register_types(void)
335 type_register_static(&tz_ppc_info);
338 type_init(tz_ppc_register_types);