2 * Cortex-A9MPCore internal peripheral emulation.
4 * Copyright (c) 2009 CodeSourcery.
5 * Copyright (c) 2011 Linaro Limited.
6 * Written by Paul Brook, Peter Maydell.
8 * This code is licensed under the GPL.
13 /* Configuration for arm_gic.c:
14 * number of external IRQ lines, max number of CPUs, how to ID current CPU
20 gic_get_current_cpu(void)
22 return cpu_single_env->cpu_index;
27 /* A9MP private memory region. */
29 typedef struct a9mp_priv_state {
33 uint32_t old_timer_status[8];
36 MemoryRegion scu_iomem;
37 MemoryRegion ptimer_iomem;
38 MemoryRegion container;
42 static uint64_t a9_scu_read(void *opaque, target_phys_addr_t offset,
45 a9mp_priv_state *s = (a9mp_priv_state *)opaque;
47 case 0x00: /* Control */
48 return s->scu_control;
49 case 0x04: /* Configuration */
50 return (((1 << s->num_cpu) - 1) << 4) | (s->num_cpu - 1);
51 case 0x08: /* CPU Power Status */
53 case 0x09: /* CPU status. */
54 return s->scu_status >> 8;
55 case 0x0a: /* CPU status. */
56 return s->scu_status >> 16;
57 case 0x0b: /* CPU status. */
58 return s->scu_status >> 24;
59 case 0x0c: /* Invalidate All Registers In Secure State */
61 case 0x40: /* Filtering Start Address Register */
62 case 0x44: /* Filtering End Address Register */
63 /* RAZ/WI, like an implementation with only one AXI master */
65 case 0x50: /* SCU Access Control Register */
66 case 0x54: /* SCU Non-secure Access Control Register */
67 /* unimplemented, fall through */
73 static void a9_scu_write(void *opaque, target_phys_addr_t offset,
74 uint64_t value, unsigned size)
76 a9mp_priv_state *s = (a9mp_priv_state *)opaque;
90 fprintf(stderr, "Invalid size %u in write to a9 scu register %x\n",
96 case 0x00: /* Control */
97 s->scu_control = value & 1;
99 case 0x4: /* Configuration: RO */
101 case 0x08: case 0x09: case 0x0A: case 0x0B: /* Power Control */
102 shift = (offset - 0x8) * 8;
103 s->scu_status &= ~(mask << shift);
104 s->scu_status |= ((value & mask) << shift);
106 case 0x0c: /* Invalidate All Registers In Secure State */
107 /* no-op as we do not implement caches */
109 case 0x40: /* Filtering Start Address Register */
110 case 0x44: /* Filtering End Address Register */
111 /* RAZ/WI, like an implementation with only one AXI master */
113 case 0x50: /* SCU Access Control Register */
114 case 0x54: /* SCU Non-secure Access Control Register */
115 /* unimplemented, fall through */
121 static const MemoryRegionOps a9_scu_ops = {
123 .write = a9_scu_write,
124 .endianness = DEVICE_NATIVE_ENDIAN,
127 static void a9mpcore_timer_irq_handler(void *opaque, int irq, int level)
129 a9mp_priv_state *s = (a9mp_priv_state *)opaque;
130 if (level && !s->old_timer_status[irq]) {
131 gic_set_pending_private(&s->gic, irq >> 1, 29 + (irq & 1));
133 s->old_timer_status[irq] = level;
136 static void a9mp_priv_reset(DeviceState *dev)
138 a9mp_priv_state *s = FROM_SYSBUSGIC(a9mp_priv_state, sysbus_from_qdev(dev));
141 for (i = 0; i < ARRAY_SIZE(s->old_timer_status); i++) {
142 s->old_timer_status[i] = 0;
146 static int a9mp_priv_init(SysBusDevice *dev)
148 a9mp_priv_state *s = FROM_SYSBUSGIC(a9mp_priv_state, dev);
149 SysBusDevice *busdev;
152 if (s->num_cpu > NCPU) {
153 hw_error("a9mp_priv_init: num-cpu may not be more than %d\n", NCPU);
156 gic_init(&s->gic, s->num_cpu);
158 s->mptimer = qdev_create(NULL, "arm_mptimer");
159 qdev_prop_set_uint32(s->mptimer, "num-cpu", s->num_cpu);
160 qdev_init_nofail(s->mptimer);
161 busdev = sysbus_from_qdev(s->mptimer);
163 /* Memory map (addresses are offsets from PERIPHBASE):
164 * 0x0000-0x00ff -- Snoop Control Unit
165 * 0x0100-0x01ff -- GIC CPU interface
166 * 0x0200-0x02ff -- Global Timer
167 * 0x0300-0x05ff -- nothing
168 * 0x0600-0x06ff -- private timers and watchdogs
169 * 0x0700-0x0fff -- nothing
170 * 0x1000-0x1fff -- GIC Distributor
172 * We should implement the global timer but don't currently do so.
174 memory_region_init(&s->container, "a9mp-priv-container", 0x2000);
175 memory_region_init_io(&s->scu_iomem, &a9_scu_ops, s, "a9mp-scu", 0x100);
176 memory_region_add_subregion(&s->container, 0, &s->scu_iomem);
177 /* GIC CPU interface */
178 memory_region_add_subregion(&s->container, 0x100, &s->gic.cpuiomem[0]);
179 /* Note that the A9 exposes only the "timer/watchdog for this core"
180 * memory region, not the "timer/watchdog for core X" ones 11MPcore has.
182 memory_region_add_subregion(&s->container, 0x600,
183 sysbus_mmio_get_region(busdev, 0));
184 memory_region_add_subregion(&s->container, 0x620,
185 sysbus_mmio_get_region(busdev, 1));
186 memory_region_add_subregion(&s->container, 0x1000, &s->gic.iomem);
188 sysbus_init_mmio(dev, &s->container);
190 /* Wire up the interrupt from each watchdog and timer. */
191 s->timer_irq = qemu_allocate_irqs(a9mpcore_timer_irq_handler,
192 s, (s->num_cpu + 1) * 2);
193 for (i = 0; i < s->num_cpu * 2; i++) {
194 sysbus_connect_irq(busdev, i, s->timer_irq[i]);
199 static const VMStateDescription vmstate_a9mp_priv = {
200 .name = "a9mpcore_priv",
202 .minimum_version_id = 1,
203 .fields = (VMStateField[]) {
204 VMSTATE_UINT32(scu_control, a9mp_priv_state),
205 VMSTATE_UINT32_ARRAY(old_timer_status, a9mp_priv_state, 8),
206 VMSTATE_UINT32_V(scu_status, a9mp_priv_state, 2),
207 VMSTATE_END_OF_LIST()
211 static SysBusDeviceInfo a9mp_priv_info = {
212 .init = a9mp_priv_init,
213 .qdev.name = "a9mpcore_priv",
214 .qdev.size = sizeof(a9mp_priv_state),
215 .qdev.vmsd = &vmstate_a9mp_priv,
216 .qdev.reset = a9mp_priv_reset,
217 .qdev.props = (Property[]) {
218 DEFINE_PROP_UINT32("num-cpu", a9mp_priv_state, num_cpu, 1),
219 DEFINE_PROP_END_OF_LIST(),
223 static void a9mp_register_devices(void)
225 sysbus_register_withprop(&a9mp_priv_info);
228 device_init(a9mp_register_devices)