mirror of https://gitee.com/openkylin/qemu.git
112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/*
|
|
* QEMU VMPort emulation
|
|
*
|
|
* Copyright (C) 2007 Hervé Poussineau
|
|
*
|
|
* 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.h"
|
|
#include "isa.h"
|
|
#include "pc.h"
|
|
#include "sysemu.h"
|
|
#include "kvm.h"
|
|
|
|
//#define VMPORT_DEBUG
|
|
|
|
#define VMPORT_CMD_GETVERSION 0x0a
|
|
#define VMPORT_CMD_GETRAMSIZE 0x14
|
|
|
|
#define VMPORT_ENTRIES 0x2c
|
|
#define VMPORT_MAGIC 0x564D5868
|
|
|
|
typedef struct _VMPortState
|
|
{
|
|
IOPortReadFunc *func[VMPORT_ENTRIES];
|
|
void *opaque[VMPORT_ENTRIES];
|
|
} VMPortState;
|
|
|
|
static VMPortState port_state;
|
|
|
|
void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque)
|
|
{
|
|
if (command >= VMPORT_ENTRIES)
|
|
return;
|
|
|
|
port_state.func[command] = func;
|
|
port_state.opaque[command] = opaque;
|
|
}
|
|
|
|
static uint32_t vmport_ioport_read(void *opaque, uint32_t addr)
|
|
{
|
|
VMPortState *s = opaque;
|
|
CPUState *env = cpu_single_env;
|
|
unsigned char command;
|
|
uint32_t eax;
|
|
|
|
cpu_synchronize_state(env);
|
|
|
|
eax = env->regs[R_EAX];
|
|
if (eax != VMPORT_MAGIC)
|
|
return eax;
|
|
|
|
command = env->regs[R_ECX];
|
|
if (command >= VMPORT_ENTRIES)
|
|
return eax;
|
|
if (!s->func[command])
|
|
{
|
|
#ifdef VMPORT_DEBUG
|
|
fprintf(stderr, "vmport: unknown command %x\n", command);
|
|
#endif
|
|
return eax;
|
|
}
|
|
|
|
return s->func[command](s->opaque[command], addr);
|
|
}
|
|
|
|
static void vmport_ioport_write(void *opaque, uint32_t addr, uint32_t val)
|
|
{
|
|
CPUState *env = cpu_single_env;
|
|
|
|
env->regs[R_EAX] = vmport_ioport_read(opaque, addr);
|
|
}
|
|
|
|
static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr)
|
|
{
|
|
CPUState *env = cpu_single_env;
|
|
env->regs[R_EBX] = VMPORT_MAGIC;
|
|
return 6;
|
|
}
|
|
|
|
static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
|
|
{
|
|
CPUState *env = cpu_single_env;
|
|
env->regs[R_EBX] = 0x1177;
|
|
return ram_size;
|
|
}
|
|
|
|
void vmport_init(void)
|
|
{
|
|
register_ioport_read(0x5658, 1, 4, vmport_ioport_read, &port_state);
|
|
register_ioport_write(0x5658, 1, 4, vmport_ioport_write, &port_state);
|
|
|
|
/* Register some generic port commands */
|
|
vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
|
|
vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
|
|
}
|