hw/arm/ast2400.c

   1 /*
   2  * AST2400 SoC
   3  *
   4  * Andrew Jeffery <andrew@aj.id.au>
   5  * Jeremy Kerr <jk@ozlabs.org>
   6  *
   7  * Copyright 2016 IBM Corp.
   8  *
   9  * This code is licensed under the GPL version 2 or later.  See
  10  * the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qapi/error.h"
  15 #include "qemu-common.h"
  16 #include "cpu.h"
  17 #include "exec/address-spaces.h"
  18 #include "hw/arm/ast2400.h"
  19 #include "hw/char/serial.h"
  20
  21 #define AST2400_UART_5_BASE      0x00184000
  22 #define AST2400_IOMEM_SIZE       0x00200000
  23 #define AST2400_IOMEM_BASE       0x1E600000
  24 #define AST2400_VIC_BASE         0x1E6C0000
  25 #define AST2400_TIMER_BASE       0x1E782000
  26
  27 static const int uart_irqs[] = { 9, 32, 33, 34, 10 };
  28 static const int timer_irqs[] = { 16, 17, 18, 35, 36, 37, 38, 39, };
  29
  30 /*
  31  * IO handlers: simply catch any reads/writes to IO addresses that aren't
  32  * handled by a device mapping.
  33  */
  34
  35 static uint64_t ast2400_io_read(void *p, hwaddr offset, unsigned size)
  36 {
  37     qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " [%u]\n",
  38                   __func__, offset, size);
  39     return 0;
  40 }
  41
  42 static void ast2400_io_write(void *opaque, hwaddr offset, uint64_t value,
  43                 unsigned size)
  44 {
  45     qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " <- 0x%" PRIx64 " [%u]\n",
  46                   __func__, offset, value, size);
  47 }
  48
  49 static const MemoryRegionOps ast2400_io_ops = {
  50     .read = ast2400_io_read,
  51     .write = ast2400_io_write,
  52     .endianness = DEVICE_LITTLE_ENDIAN,
  53 };
  54
  55 static void ast2400_init(Object *obj)
  56 {
  57     AST2400State *s = AST2400(obj);
  58
  59     s->cpu = cpu_arm_init("arm926");
  60
  61     object_initialize(&s->vic, sizeof(s->vic), TYPE_ASPEED_VIC);
  62     object_property_add_child(obj, "vic", OBJECT(&s->vic), NULL);
  63     qdev_set_parent_bus(DEVICE(&s->vic), sysbus_get_default());
  64
  65     object_initialize(&s->timerctrl, sizeof(s->timerctrl), TYPE_ASPEED_TIMER);
  66     object_property_add_child(obj, "timerctrl", OBJECT(&s->timerctrl), NULL);
  67     qdev_set_parent_bus(DEVICE(&s->timerctrl), sysbus_get_default());
  68 }
  69
  70 static void ast2400_realize(DeviceState *dev, Error **errp)
  71 {
  72     int i;
  73     AST2400State *s = AST2400(dev);
  74     Error *err = NULL;
  75
  76     /* IO space */
  77     memory_region_init_io(&s->iomem, NULL, &ast2400_io_ops, NULL,
  78             "ast2400.io", AST2400_IOMEM_SIZE);
  79     memory_region_add_subregion_overlap(get_system_memory(), AST2400_IOMEM_BASE,
  80             &s->iomem, -1);
  81
  82     /* VIC */
  83     object_property_set_bool(OBJECT(&s->vic), true, "realized", &err);
  84     if (err) {
  85         error_propagate(errp, err);
  86         return;
  87     }
  88     sysbus_mmio_map(SYS_BUS_DEVICE(&s->vic), 0, AST2400_VIC_BASE);
  89     sysbus_connect_irq(SYS_BUS_DEVICE(&s->vic), 0,
  90                        qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ));
  91     sysbus_connect_irq(SYS_BUS_DEVICE(&s->vic), 1,
  92                        qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_FIQ));
  93
  94     /* Timer */
  95     object_property_set_bool(OBJECT(&s->timerctrl), true, "realized", &err);
  96     if (err) {
  97         error_propagate(errp, err);
  98         return;
  99     }
 100     sysbus_mmio_map(SYS_BUS_DEVICE(&s->timerctrl), 0, AST2400_TIMER_BASE);
 101     for (i = 0; i < ARRAY_SIZE(timer_irqs); i++) {
 102         qemu_irq irq = qdev_get_gpio_in(DEVICE(&s->vic), timer_irqs[i]);
 103         sysbus_connect_irq(SYS_BUS_DEVICE(&s->timerctrl), i, irq);
 104     }
 105
 106     /* UART - attach an 8250 to the IO space as our UART5 */
 107     if (serial_hds[0]) {
 108         qemu_irq uart5 = qdev_get_gpio_in(DEVICE(&s->vic), uart_irqs[4]);
 109         serial_mm_init(&s->iomem, AST2400_UART_5_BASE, 2,
 110                        uart5, 38400, serial_hds[0], DEVICE_LITTLE_ENDIAN);
 111     }
 112 }
 113
 114 static void ast2400_class_init(ObjectClass *oc, void *data)
 115 {
 116     DeviceClass *dc = DEVICE_CLASS(oc);
 117
 118     dc->realize = ast2400_realize;
 119
 120     /*
 121      * Reason: creates an ARM CPU, thus use after free(), see
 122      * arm_cpu_class_init()
 123      */
 124     dc->cannot_destroy_with_object_finalize_yet = true;
 125 }
 126
 127 static const TypeInfo ast2400_type_info = {
 128     .name = TYPE_AST2400,
 129     .parent = TYPE_SYS_BUS_DEVICE,
 130     .instance_size = sizeof(AST2400State),
 131     .instance_init = ast2400_init,
 132     .class_init = ast2400_class_init,
 133 };
 134
 135 static void ast2400_register_types(void)
 136 {
 137     type_register_static(&ast2400_type_info);
 138 }
 139
 140 type_init(ast2400_register_types)