| /* |
| * LED, Switch and Debug control registers for ARM Integrator Boards |
| * |
| * This is currently a stub for this functionality but at least |
| * ensures something other than unassigned_mem_read() handles access |
| * to this area. |
| * |
| * The real h/w is described at: |
| * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0159b/Babbfijf.html |
| * |
| * Copyright (c) 2013 Alex Bennée <alex@bennee.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| |
| #include "hw/hw.h" |
| #include "hw/sysbus.h" |
| #include "exec/address-spaces.h" |
| #include "hw/misc/arm_integrator_debug.h" |
| |
| #define INTEGRATOR_DEBUG(obj) \ |
| OBJECT_CHECK(IntegratorDebugState, (obj), TYPE_INTEGRATOR_DEBUG) |
| |
| typedef struct { |
| SysBusDevice parent_obj; |
| |
| MemoryRegion iomem; |
| } IntegratorDebugState; |
| |
| static uint64_t intdbg_control_read(void *opaque, hwaddr offset, |
| unsigned size) |
| { |
| switch (offset >> 2) { |
| case 0: /* ALPHA */ |
| case 1: /* LEDS */ |
| case 2: /* SWITCHES */ |
| qemu_log_mask(LOG_UNIMP, |
| "%s: returning zero from %" HWADDR_PRIx ":%u\n", |
| __func__, offset, size); |
| return 0; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Bad offset %" HWADDR_PRIx, |
| __func__, offset); |
| return 0; |
| } |
| } |
| |
| static void intdbg_control_write(void *opaque, hwaddr offset, |
| uint64_t value, unsigned size) |
| { |
| switch (offset >> 2) { |
| case 1: /* ALPHA */ |
| case 2: /* LEDS */ |
| case 3: /* SWITCHES */ |
| /* Nothing interesting implemented yet. */ |
| qemu_log_mask(LOG_UNIMP, |
| "%s: ignoring write of %" PRIu64 |
| " to %" HWADDR_PRIx ":%u\n", |
| __func__, value, offset, size); |
| break; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: write of %" PRIu64 |
| " to bad offset %" HWADDR_PRIx "\n", |
| __func__, value, offset); |
| } |
| } |
| |
| static const MemoryRegionOps intdbg_control_ops = { |
| .read = intdbg_control_read, |
| .write = intdbg_control_write, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static void intdbg_control_init(Object *obj) |
| { |
| SysBusDevice *sd = SYS_BUS_DEVICE(obj); |
| IntegratorDebugState *s = INTEGRATOR_DEBUG(obj); |
| |
| memory_region_init_io(&s->iomem, obj, &intdbg_control_ops, |
| NULL, "dbg-leds", 0x1000000); |
| sysbus_init_mmio(sd, &s->iomem); |
| } |
| |
| static const TypeInfo intdbg_info = { |
| .name = TYPE_INTEGRATOR_DEBUG, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(IntegratorDebugState), |
| .instance_init = intdbg_control_init, |
| }; |
| |
| static void intdbg_register_types(void) |
| { |
| type_register_static(&intdbg_info); |
| } |
| |
| type_init(intdbg_register_types) |