2 * LED, Switch and Debug control registers for ARM Integrator Boards
4 * This is currently a stub for this functionality but at least
5 * ensures something other than unassigned_mem_read() handles access
8 * The real h/w is described at:
9 * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0159b/Babbfijf.html
11 * Copyright (c) 2013 Alex Bennée <alex@bennee.com>
13 * This work is licensed under the terms of the GNU GPL, version 2 or later.
14 * See the COPYING file in the top-level directory.
18 #include "hw/sysbus.h"
19 #include "exec/address-spaces.h"
20 #include "hw/misc/arm_integrator_debug.h"
22 #define INTEGRATOR_DEBUG(obj) \
23 OBJECT_CHECK(IntegratorDebugState, (obj), TYPE_INTEGRATOR_DEBUG)
26 SysBusDevice parent_obj
;
29 } IntegratorDebugState
;
31 static uint64_t intdbg_control_read(void *opaque
, hwaddr offset
,
34 switch (offset
>> 2) {
37 case 2: /* SWITCHES */
38 qemu_log_mask(LOG_UNIMP
,
39 "%s: returning zero from %" HWADDR_PRIx
":%u\n",
40 __func__
, offset
, size
);
43 qemu_log_mask(LOG_GUEST_ERROR
,
44 "%s: Bad offset %" HWADDR_PRIx
,
50 static void intdbg_control_write(void *opaque
, hwaddr offset
,
51 uint64_t value
, unsigned size
)
53 switch (offset
>> 2) {
56 case 3: /* SWITCHES */
57 /* Nothing interesting implemented yet. */
58 qemu_log_mask(LOG_UNIMP
,
59 "%s: ignoring write of %" PRIu64
60 " to %" HWADDR_PRIx
":%u\n",
61 __func__
, value
, offset
, size
);
64 qemu_log_mask(LOG_GUEST_ERROR
,
65 "%s: write of %" PRIu64
66 " to bad offset %" HWADDR_PRIx
"\n",
67 __func__
, value
, offset
);
71 static const MemoryRegionOps intdbg_control_ops
= {
72 .read
= intdbg_control_read
,
73 .write
= intdbg_control_write
,
74 .endianness
= DEVICE_NATIVE_ENDIAN
,
77 static void intdbg_control_init(Object
*obj
)
79 SysBusDevice
*sd
= SYS_BUS_DEVICE(obj
);
80 IntegratorDebugState
*s
= INTEGRATOR_DEBUG(obj
);
82 memory_region_init_io(&s
->iomem
, NULL
, &intdbg_control_ops
,
83 NULL
, "dbg-leds", 0x1000000);
84 sysbus_init_mmio(sd
, &s
->iomem
);
87 static const TypeInfo intdbg_info
= {
88 .name
= TYPE_INTEGRATOR_DEBUG
,
89 .parent
= TYPE_SYS_BUS_DEVICE
,
90 .instance_size
= sizeof(IntegratorDebugState
),
91 .instance_init
= intdbg_control_init
,
94 static void intdbg_register_types(void)
96 type_register_static(&intdbg_info
);
99 type_init(intdbg_register_types
)