/* * QEMU VMPort emulation * * Copyright (C) 2007 Herv� 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_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; 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); }