a9mpcore.c (6733B)
1 /* 2 * Cortex-A9MPCore internal peripheral emulation. 3 * 4 * Copyright (c) 2009 CodeSourcery. 5 * Copyright (c) 2011 Linaro Limited. 6 * Written by Paul Brook, Peter Maydell. 7 * 8 * This code is licensed under the GPL. 9 */ 10 11 #include "qemu/osdep.h" 12 #include "qapi/error.h" 13 #include "qemu/module.h" 14 #include "hw/cpu/a9mpcore.h" 15 #include "hw/irq.h" 16 #include "hw/qdev-properties.h" 17 #include "hw/core/cpu.h" 18 #include "cpu.h" 19 20 #define A9_GIC_NUM_PRIORITY_BITS 5 21 22 static void a9mp_priv_set_irq(void *opaque, int irq, int level) 23 { 24 A9MPPrivState *s = (A9MPPrivState *)opaque; 25 26 qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level); 27 } 28 29 static void a9mp_priv_initfn(Object *obj) 30 { 31 A9MPPrivState *s = A9MPCORE_PRIV(obj); 32 33 memory_region_init(&s->container, obj, "a9mp-priv-container", 0x2000); 34 sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->container); 35 36 object_initialize_child(obj, "scu", &s->scu, TYPE_A9_SCU); 37 38 object_initialize_child(obj, "gic", &s->gic, TYPE_ARM_GIC); 39 40 object_initialize_child(obj, "gtimer", &s->gtimer, TYPE_A9_GTIMER); 41 42 object_initialize_child(obj, "mptimer", &s->mptimer, TYPE_ARM_MPTIMER); 43 44 object_initialize_child(obj, "wdt", &s->wdt, TYPE_ARM_MPTIMER); 45 } 46 47 static void a9mp_priv_realize(DeviceState *dev, Error **errp) 48 { 49 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 50 A9MPPrivState *s = A9MPCORE_PRIV(dev); 51 DeviceState *scudev, *gicdev, *gtimerdev, *mptimerdev, *wdtdev; 52 SysBusDevice *scubusdev, *gicbusdev, *gtimerbusdev, *mptimerbusdev, 53 *wdtbusdev; 54 int i; 55 bool has_el3; 56 CPUState *cpu0; 57 Object *cpuobj; 58 59 cpu0 = qemu_get_cpu(0); 60 cpuobj = OBJECT(cpu0); 61 if (strcmp(object_get_typename(cpuobj), ARM_CPU_TYPE_NAME("cortex-a9"))) { 62 /* We might allow Cortex-A5 once we model it */ 63 error_setg(errp, 64 "Cortex-A9MPCore peripheral can only use Cortex-A9 CPU"); 65 return; 66 } 67 68 scudev = DEVICE(&s->scu); 69 qdev_prop_set_uint32(scudev, "num-cpu", s->num_cpu); 70 if (!sysbus_realize(SYS_BUS_DEVICE(&s->scu), errp)) { 71 return; 72 } 73 scubusdev = SYS_BUS_DEVICE(&s->scu); 74 75 gicdev = DEVICE(&s->gic); 76 qdev_prop_set_uint32(gicdev, "num-cpu", s->num_cpu); 77 qdev_prop_set_uint32(gicdev, "num-irq", s->num_irq); 78 qdev_prop_set_uint32(gicdev, "num-priority-bits", 79 A9_GIC_NUM_PRIORITY_BITS); 80 81 /* Make the GIC's TZ support match the CPUs. We assume that 82 * either all the CPUs have TZ, or none do. 83 */ 84 has_el3 = object_property_find(cpuobj, "has_el3") && 85 object_property_get_bool(cpuobj, "has_el3", &error_abort); 86 qdev_prop_set_bit(gicdev, "has-security-extensions", has_el3); 87 88 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) { 89 return; 90 } 91 gicbusdev = SYS_BUS_DEVICE(&s->gic); 92 93 /* Pass through outbound IRQ lines from the GIC */ 94 sysbus_pass_irq(sbd, gicbusdev); 95 96 /* Pass through inbound GPIO lines to the GIC */ 97 qdev_init_gpio_in(dev, a9mp_priv_set_irq, s->num_irq - 32); 98 99 gtimerdev = DEVICE(&s->gtimer); 100 qdev_prop_set_uint32(gtimerdev, "num-cpu", s->num_cpu); 101 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gtimer), errp)) { 102 return; 103 } 104 gtimerbusdev = SYS_BUS_DEVICE(&s->gtimer); 105 106 mptimerdev = DEVICE(&s->mptimer); 107 qdev_prop_set_uint32(mptimerdev, "num-cpu", s->num_cpu); 108 if (!sysbus_realize(SYS_BUS_DEVICE(&s->mptimer), errp)) { 109 return; 110 } 111 mptimerbusdev = SYS_BUS_DEVICE(&s->mptimer); 112 113 wdtdev = DEVICE(&s->wdt); 114 qdev_prop_set_uint32(wdtdev, "num-cpu", s->num_cpu); 115 if (!sysbus_realize(SYS_BUS_DEVICE(&s->wdt), errp)) { 116 return; 117 } 118 wdtbusdev = SYS_BUS_DEVICE(&s->wdt); 119 120 /* Memory map (addresses are offsets from PERIPHBASE): 121 * 0x0000-0x00ff -- Snoop Control Unit 122 * 0x0100-0x01ff -- GIC CPU interface 123 * 0x0200-0x02ff -- Global Timer 124 * 0x0300-0x05ff -- nothing 125 * 0x0600-0x06ff -- private timers and watchdogs 126 * 0x0700-0x0fff -- nothing 127 * 0x1000-0x1fff -- GIC Distributor 128 */ 129 memory_region_add_subregion(&s->container, 0, 130 sysbus_mmio_get_region(scubusdev, 0)); 131 /* GIC CPU interface */ 132 memory_region_add_subregion(&s->container, 0x100, 133 sysbus_mmio_get_region(gicbusdev, 1)); 134 memory_region_add_subregion(&s->container, 0x200, 135 sysbus_mmio_get_region(gtimerbusdev, 0)); 136 /* Note that the A9 exposes only the "timer/watchdog for this core" 137 * memory region, not the "timer/watchdog for core X" ones 11MPcore has. 138 */ 139 memory_region_add_subregion(&s->container, 0x600, 140 sysbus_mmio_get_region(mptimerbusdev, 0)); 141 memory_region_add_subregion(&s->container, 0x620, 142 sysbus_mmio_get_region(wdtbusdev, 0)); 143 memory_region_add_subregion(&s->container, 0x1000, 144 sysbus_mmio_get_region(gicbusdev, 0)); 145 146 /* Wire up the interrupt from each watchdog and timer. 147 * For each core the global timer is PPI 27, the private 148 * timer is PPI 29 and the watchdog PPI 30. 149 */ 150 for (i = 0; i < s->num_cpu; i++) { 151 int ppibase = (s->num_irq - 32) + i * 32; 152 sysbus_connect_irq(gtimerbusdev, i, 153 qdev_get_gpio_in(gicdev, ppibase + 27)); 154 sysbus_connect_irq(mptimerbusdev, i, 155 qdev_get_gpio_in(gicdev, ppibase + 29)); 156 sysbus_connect_irq(wdtbusdev, i, 157 qdev_get_gpio_in(gicdev, ppibase + 30)); 158 } 159 } 160 161 static Property a9mp_priv_properties[] = { 162 DEFINE_PROP_UINT32("num-cpu", A9MPPrivState, num_cpu, 1), 163 /* The Cortex-A9MP may have anything from 0 to 224 external interrupt 164 * IRQ lines (with another 32 internal). We default to 64+32, which 165 * is the number provided by the Cortex-A9MP test chip in the 166 * Realview PBX-A9 and Versatile Express A9 development boards. 167 * Other boards may differ and should set this property appropriately. 168 */ 169 DEFINE_PROP_UINT32("num-irq", A9MPPrivState, num_irq, 96), 170 DEFINE_PROP_END_OF_LIST(), 171 }; 172 173 static void a9mp_priv_class_init(ObjectClass *klass, void *data) 174 { 175 DeviceClass *dc = DEVICE_CLASS(klass); 176 177 dc->realize = a9mp_priv_realize; 178 device_class_set_props(dc, a9mp_priv_properties); 179 } 180 181 static const TypeInfo a9mp_priv_info = { 182 .name = TYPE_A9MPCORE_PRIV, 183 .parent = TYPE_SYS_BUS_DEVICE, 184 .instance_size = sizeof(A9MPPrivState), 185 .instance_init = a9mp_priv_initfn, 186 .class_init = a9mp_priv_class_init, 187 }; 188 189 static void a9mp_register_types(void) 190 { 191 type_register_static(&a9mp_priv_info); 192 } 193 194 type_init(a9mp_register_types)