diff options
author | 2015-08-28 09:58:54 +0800 | |
---|---|---|
committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/hw/char/debugcon.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/hw/char/debugcon.c')
-rw-r--r-- | qemu/hw/char/debugcon.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/qemu/hw/char/debugcon.c b/qemu/hw/char/debugcon.c new file mode 100644 index 000000000..36f1c4adb --- /dev/null +++ b/qemu/hw/char/debugcon.c @@ -0,0 +1,140 @@ +/* + * QEMU Bochs-style debug console ("port E9") emulation + * + * Copyright (c) 2003-2004 Fabrice Bellard + * Copyright (c) 2008 Citrix Systems, Inc. + * Copyright (c) Intel Corporation; author: H. Peter Anvin + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/hw.h" +#include "sysemu/char.h" +#include "hw/isa/isa.h" +#include "hw/i386/pc.h" + +#define TYPE_ISA_DEBUGCON_DEVICE "isa-debugcon" +#define ISA_DEBUGCON_DEVICE(obj) \ + OBJECT_CHECK(ISADebugconState, (obj), TYPE_ISA_DEBUGCON_DEVICE) + +//#define DEBUG_DEBUGCON + +typedef struct DebugconState { + MemoryRegion io; + CharDriverState *chr; + uint32_t readback; +} DebugconState; + +typedef struct ISADebugconState { + ISADevice parent_obj; + + uint32_t iobase; + DebugconState state; +} ISADebugconState; + +static void debugcon_ioport_write(void *opaque, hwaddr addr, uint64_t val, + unsigned width) +{ + DebugconState *s = opaque; + unsigned char ch = val; + +#ifdef DEBUG_DEBUGCON + printf(" [debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02" PRIx64 "]\n", addr, val); +#endif + + qemu_chr_fe_write(s->chr, &ch, 1); +} + + +static uint64_t debugcon_ioport_read(void *opaque, hwaddr addr, unsigned width) +{ + DebugconState *s = opaque; + +#ifdef DEBUG_DEBUGCON + printf("debugcon: read addr=0x%04" HWADDR_PRIx "\n", addr); +#endif + + return s->readback; +} + +static const MemoryRegionOps debugcon_ops = { + .read = debugcon_ioport_read, + .write = debugcon_ioport_write, + .valid.min_access_size = 1, + .valid.max_access_size = 1, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void debugcon_realize_core(DebugconState *s, Error **errp) +{ + if (!s->chr) { + error_setg(errp, "Can't create debugcon device, empty char device"); + return; + } + + qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, s); +} + +static void debugcon_isa_realizefn(DeviceState *dev, Error **errp) +{ + ISADevice *d = ISA_DEVICE(dev); + ISADebugconState *isa = ISA_DEBUGCON_DEVICE(dev); + DebugconState *s = &isa->state; + Error *err = NULL; + + debugcon_realize_core(s, &err); + if (err != NULL) { + error_propagate(errp, err); + return; + } + memory_region_init_io(&s->io, OBJECT(dev), &debugcon_ops, s, + TYPE_ISA_DEBUGCON_DEVICE, 1); + memory_region_add_subregion(isa_address_space_io(d), + isa->iobase, &s->io); +} + +static Property debugcon_isa_properties[] = { + DEFINE_PROP_UINT32("iobase", ISADebugconState, iobase, 0xe9), + DEFINE_PROP_CHR("chardev", ISADebugconState, state.chr), + DEFINE_PROP_UINT32("readback", ISADebugconState, state.readback, 0xe9), + DEFINE_PROP_END_OF_LIST(), +}; + +static void debugcon_isa_class_initfn(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = debugcon_isa_realizefn; + dc->props = debugcon_isa_properties; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); +} + +static const TypeInfo debugcon_isa_info = { + .name = TYPE_ISA_DEBUGCON_DEVICE, + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(ISADebugconState), + .class_init = debugcon_isa_class_initfn, +}; + +static void debugcon_register_types(void) +{ + type_register_static(&debugcon_isa_info); +} + +type_init(debugcon_register_types) |