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