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Annotation of qemu/hw/vmport.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * QEMU VMPort emulation
                      3:  *
                      4:  * Copyright (C) 2007 Herv� Poussineau
                      5:  *
                      6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
                      7:  * of this software and associated documentation files (the "Software"), to deal
                      8:  * in the Software without restriction, including without limitation the rights
                      9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
                     10:  * copies of the Software, and to permit persons to whom the Software is
                     11:  * furnished to do so, subject to the following conditions:
                     12:  *
                     13:  * The above copyright notice and this permission notice shall be included in
                     14:  * all copies or substantial portions of the Software.
                     15:  *
                     16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
                     17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
                     19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
                     20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
                     21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
                     22:  * THE SOFTWARE.
                     23:  */
                     24: #include "hw.h"
                     25: #include "isa.h"
                     26: #include "pc.h"
                     27: #include "sysemu.h"
                     28: 
                     29: #define VMPORT_CMD_GETVERSION 0x0a
                     30: #define VMPORT_CMD_GETRAMSIZE 0x14
                     31: 
                     32: #define VMPORT_ENTRIES 0x2c
                     33: #define VMPORT_MAGIC   0x564D5868
                     34: 
                     35: typedef struct _VMPortState
                     36: {
                     37:     CPUState *env;
                     38:     IOPortReadFunc *func[VMPORT_ENTRIES];
                     39:     void *opaque[VMPORT_ENTRIES];
                     40: } VMPortState;
                     41: 
                     42: static VMPortState port_state;
                     43: 
                     44: void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque)
                     45: {
                     46:     if (command >= VMPORT_ENTRIES)
                     47:         return;
                     48: 
                     49:     port_state.func[command] = func;
                     50:     port_state.opaque[command] = opaque;
                     51: }
                     52: 
                     53: static uint32_t vmport_ioport_read(void *opaque, uint32_t addr)
                     54: {
                     55:     VMPortState *s = opaque;
                     56:     unsigned char command;
                     57:     uint32_t eax;
                     58: 
                     59:     eax = s->env->regs[R_EAX];
                     60:     if (eax != VMPORT_MAGIC)
                     61:         return eax;
                     62: 
                     63:     command = s->env->regs[R_ECX];
                     64:     if (command >= VMPORT_ENTRIES)
                     65:         return eax;
                     66:     if (!s->func[command])
                     67:     {
                     68:         printf("vmport: unknown command %x\n", command);
                     69:         return eax;
                     70:     }
                     71: 
                     72:     return s->func[command](s->opaque[command], addr);
                     73: }
                     74: 
                     75: static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr)
                     76: {
                     77:     CPUState *env = opaque;
                     78:     env->regs[R_EBX] = VMPORT_MAGIC;
                     79:     return 6;
                     80: }
                     81: 
                     82: static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
                     83: {
                     84:     CPUState *env = opaque;
                     85:     env->regs[R_EBX] = 0x1177;
                     86:     return ram_size;
                     87: }
                     88: 
                     89: void vmport_init(CPUState *env)
                     90: {
                     91:     port_state.env = env;
                     92: 
                     93:     register_ioport_read(0x5658, 1, 4, vmport_ioport_read, &port_state);
                     94: 
                     95:     /* Register some generic port commands */
                     96:     vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, env);
                     97:     vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, env);
                     98: }

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