| /* |
| * 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" |
| |
| #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; |
| |
| 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]) |
| { |
| printf("vmport: unknown command %x\n", command); |
| 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); |
| } |