1 /* 2 * Raspberry Pi emulation (c) 2012 Gregory Estrade 3 * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous 4 * 5 * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft 6 * Written by Andrew Baumann 7 * 8 * This code is licensed under the GNU GPLv2 and later. 9 */ 10 11 #include "qemu/osdep.h" 12 #include "qapi/error.h" 13 #include "qemu-common.h" 14 #include "cpu.h" 15 #include "hw/arm/bcm2836.h" 16 #include "hw/arm/raspi_platform.h" 17 #include "hw/sysbus.h" 18 #include "exec/address-spaces.h" 19 20 /* Peripheral base address seen by the CPU */ 21 #define BCM2836_PERI_BASE 0x3F000000 22 23 /* "QA7" (Pi2) interrupt controller and mailboxes etc. */ 24 #define BCM2836_CONTROL_BASE 0x40000000 25 26 static void bcm2836_init(Object *obj) 27 { 28 BCM2836State *s = BCM2836(obj); 29 int n; 30 31 for (n = 0; n < BCM2836_NCPUS; n++) { 32 object_initialize(&s->cpus[n], sizeof(s->cpus[n]), 33 "cortex-a15-" TYPE_ARM_CPU); 34 object_property_add_child(obj, "cpu[*]", OBJECT(&s->cpus[n]), 35 &error_abort); 36 } 37 38 object_initialize(&s->control, sizeof(s->control), TYPE_BCM2836_CONTROL); 39 object_property_add_child(obj, "control", OBJECT(&s->control), NULL); 40 qdev_set_parent_bus(DEVICE(&s->control), sysbus_get_default()); 41 42 object_initialize(&s->peripherals, sizeof(s->peripherals), 43 TYPE_BCM2835_PERIPHERALS); 44 object_property_add_child(obj, "peripherals", OBJECT(&s->peripherals), 45 &error_abort); 46 object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals), 47 "board-rev", &error_abort); 48 object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals), 49 "vcram-size", &error_abort); 50 qdev_set_parent_bus(DEVICE(&s->peripherals), sysbus_get_default()); 51 } 52 53 static void bcm2836_realize(DeviceState *dev, Error **errp) 54 { 55 BCM2836State *s = BCM2836(dev); 56 Object *obj; 57 Error *err = NULL; 58 int n; 59 60 /* common peripherals from bcm2835 */ 61 62 obj = object_property_get_link(OBJECT(dev), "ram", &err); 63 if (obj == NULL) { 64 error_setg(errp, "%s: required ram link not found: %s", 65 __func__, error_get_pretty(err)); 66 return; 67 } 68 69 object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj, &err); 70 if (err) { 71 error_propagate(errp, err); 72 return; 73 } 74 75 object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err); 76 if (err) { 77 error_propagate(errp, err); 78 return; 79 } 80 81 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->peripherals), 82 "sd-bus", &err); 83 if (err) { 84 error_propagate(errp, err); 85 return; 86 } 87 88 sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->peripherals), 0, 89 BCM2836_PERI_BASE, 1); 90 91 /* bcm2836 interrupt controller (and mailboxes, etc.) */ 92 object_property_set_bool(OBJECT(&s->control), true, "realized", &err); 93 if (err) { 94 error_propagate(errp, err); 95 return; 96 } 97 98 sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, BCM2836_CONTROL_BASE); 99 100 sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0, 101 qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0)); 102 sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1, 103 qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0)); 104 105 for (n = 0; n < BCM2836_NCPUS; n++) { 106 /* Mirror bcm2836, which has clusterid set to 0xf 107 * TODO: this should be converted to a property of ARM_CPU 108 */ 109 s->cpus[n].mp_affinity = 0xF00 | n; 110 111 /* set periphbase/CBAR value for CPU-local registers */ 112 object_property_set_int(OBJECT(&s->cpus[n]), 113 BCM2836_PERI_BASE + MCORE_OFFSET, 114 "reset-cbar", &err); 115 if (err) { 116 error_propagate(errp, err); 117 return; 118 } 119 120 /* start powered off if not enabled */ 121 object_property_set_bool(OBJECT(&s->cpus[n]), n >= s->enabled_cpus, 122 "start-powered-off", &err); 123 if (err) { 124 error_propagate(errp, err); 125 return; 126 } 127 128 object_property_set_bool(OBJECT(&s->cpus[n]), true, "realized", &err); 129 if (err) { 130 error_propagate(errp, err); 131 return; 132 } 133 134 /* Connect irq/fiq outputs from the interrupt controller. */ 135 qdev_connect_gpio_out_named(DEVICE(&s->control), "irq", n, 136 qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_IRQ)); 137 qdev_connect_gpio_out_named(DEVICE(&s->control), "fiq", n, 138 qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_FIQ)); 139 140 /* Connect timers from the CPU to the interrupt controller */ 141 qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_PHYS, 142 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpnsirq", n)); 143 qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_VIRT, 144 qdev_get_gpio_in_named(DEVICE(&s->control), "cntvirq", n)); 145 qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_HYP, 146 qdev_get_gpio_in_named(DEVICE(&s->control), "cnthpirq", n)); 147 qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_SEC, 148 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n)); 149 } 150 } 151 152 static Property bcm2836_props[] = { 153 DEFINE_PROP_UINT32("enabled-cpus", BCM2836State, enabled_cpus, BCM2836_NCPUS), 154 DEFINE_PROP_END_OF_LIST() 155 }; 156 157 static void bcm2836_class_init(ObjectClass *oc, void *data) 158 { 159 DeviceClass *dc = DEVICE_CLASS(oc); 160 161 dc->props = bcm2836_props; 162 dc->realize = bcm2836_realize; 163 164 /* 165 * Reason: creates an ARM CPU, thus use after free(), see 166 * arm_cpu_class_init() 167 */ 168 dc->cannot_destroy_with_object_finalize_yet = true; 169 } 170 171 static const TypeInfo bcm2836_type_info = { 172 .name = TYPE_BCM2836, 173 .parent = TYPE_SYS_BUS_DEVICE, 174 .instance_size = sizeof(BCM2836State), 175 .instance_init = bcm2836_init, 176 .class_init = bcm2836_class_init, 177 }; 178 179 static void bcm2836_register_types(void) 180 { 181 type_register_static(&bcm2836_type_info); 182 } 183 184 type_init(bcm2836_register_types) 185