LXR qemu/ioport.c

   1/*
   2 * QEMU System Emulator
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   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/*
  25 * splitted out ioport related stuffs from vl.c.
  26 */
  27
  28#include "ioport.h"
  29#include "trace.h"
  30
  31/***********************************************************/
  32/* IO Port */
  33
  34//#define DEBUG_UNUSED_IOPORT
  35//#define DEBUG_IOPORT
  36
  37#ifdef DEBUG_UNUSED_IOPORT
  38#  define LOG_UNUSED_IOPORT(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
  39#else
  40#  define LOG_UNUSED_IOPORT(fmt, ...) do{ } while (0)
  41#endif
  42
  43#ifdef DEBUG_IOPORT
  44#  define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__)
  45#else
  46#  define LOG_IOPORT(...) do { } while (0)
  47#endif
  48
  49/* XXX: use a two level table to limit memory usage */
  50
  51static void *ioport_opaque[MAX_IOPORTS];
  52static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
  53static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
  54
  55static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl;
  56static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel;
  57
  58static uint32_t ioport_read(int index, uint32_t address)
  59{
  60    static IOPortReadFunc * const default_func[3] = {
  61        default_ioport_readb,
  62        default_ioport_readw,
  63        default_ioport_readl
  64    };
  65    IOPortReadFunc *func = ioport_read_table[index][address];
  66    if (!func)
  67        func = default_func[index];
  68    return func(ioport_opaque[address], address);
  69}
  70
  71static void ioport_write(int index, uint32_t address, uint32_t data)
  72{
  73    static IOPortWriteFunc * const default_func[3] = {
  74        default_ioport_writeb,
  75        default_ioport_writew,
  76        default_ioport_writel
  77    };
  78    IOPortWriteFunc *func = ioport_write_table[index][address];
  79    if (!func)
  80        func = default_func[index];
  81    func(ioport_opaque[address], address, data);
  82}
  83
  84static uint32_t default_ioport_readb(void *opaque, uint32_t address)
  85{
  86    LOG_UNUSED_IOPORT("unused inb: port=0x%04"PRIx32"\n", address);
  87    return 0xff;
  88}
  89
  90static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
  91{
  92    LOG_UNUSED_IOPORT("unused outb: port=0x%04"PRIx32" data=0x%02"PRIx32"\n",
  93                      address, data);
  94}
  95
  96/* default is to make two byte accesses */
  97static uint32_t default_ioport_readw(void *opaque, uint32_t address)
  98{
  99    uint32_t data;
 100    data = ioport_read(0, address);
 101    address = (address + 1) & IOPORTS_MASK;
 102    data |= ioport_read(0, address) << 8;
 103    return data;
 104}
 105
 106static void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
 107{
 108    ioport_write(0, address, data & 0xff);
 109    address = (address + 1) & IOPORTS_MASK;
 110    ioport_write(0, address, (data >> 8) & 0xff);
 111}
 112
 113static uint32_t default_ioport_readl(void *opaque, uint32_t address)
 114{
 115    LOG_UNUSED_IOPORT("unused inl: port=0x%04"PRIx32"\n", address);
 116    return 0xffffffff;
 117}
 118
 119static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
 120{
 121    LOG_UNUSED_IOPORT("unused outl: port=0x%04"PRIx32" data=0x%02"PRIx32"\n",
 122                      address, data);
 123}
 124
 125static int ioport_bsize(int size, int *bsize)
 126{
 127    if (size == 1) {
 128        *bsize = 0;
 129    } else if (size == 2) {
 130        *bsize = 1;
 131    } else if (size == 4) {
 132        *bsize = 2;
 133    } else {
 134        return -1;
 135    }
 136    return 0;
 137}
 138
 139/* size is the word size in byte */
 140int register_ioport_read(pio_addr_t start, int length, int size,
 141                         IOPortReadFunc *func, void *opaque)
 142{
 143    int i, bsize;
 144
 145    if (ioport_bsize(size, &bsize)) {
 146        hw_error("register_ioport_read: invalid size");
 147        return -1;
 148    }
 149    for(i = start; i < start + length; i += size) {
 150        ioport_read_table[bsize][i] = func;
 151        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
 152            hw_error("register_ioport_read: invalid opaque");
 153        ioport_opaque[i] = opaque;
 154    }
 155    return 0;
 156}
 157
 158/* size is the word size in byte */
 159int register_ioport_write(pio_addr_t start, int length, int size,
 160                          IOPortWriteFunc *func, void *opaque)
 161{
 162    int i, bsize;
 163
 164    if (ioport_bsize(size, &bsize)) {
 165        hw_error("register_ioport_write: invalid size");
 166        return -1;
 167    }
 168    for(i = start; i < start + length; i += size) {
 169        ioport_write_table[bsize][i] = func;
 170        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
 171            hw_error("register_ioport_write: invalid opaque");
 172        ioport_opaque[i] = opaque;
 173    }
 174    return 0;
 175}
 176
 177static uint32_t ioport_readb_thunk(void *opaque, uint32_t addr)
 178{
 179    IORange *ioport = opaque;
 180    uint64_t data;
 181
 182    ioport->ops->read(ioport, addr - ioport->base, 1, &data);
 183    return data;
 184}
 185
 186static uint32_t ioport_readw_thunk(void *opaque, uint32_t addr)
 187{
 188    IORange *ioport = opaque;
 189    uint64_t data;
 190
 191    ioport->ops->read(ioport, addr - ioport->base, 2, &data);
 192    return data;
 193}
 194
 195static uint32_t ioport_readl_thunk(void *opaque, uint32_t addr)
 196{
 197    IORange *ioport = opaque;
 198    uint64_t data;
 199
 200    ioport->ops->read(ioport, addr - ioport->base, 4, &data);
 201    return data;
 202}
 203
 204static void ioport_writeb_thunk(void *opaque, uint32_t addr, uint32_t data)
 205{
 206    IORange *ioport = opaque;
 207
 208    ioport->ops->write(ioport, addr - ioport->base, 1, data);
 209}
 210
 211static void ioport_writew_thunk(void *opaque, uint32_t addr, uint32_t data)
 212{
 213    IORange *ioport = opaque;
 214
 215    ioport->ops->write(ioport, addr - ioport->base, 2, data);
 216}
 217
 218static void ioport_writel_thunk(void *opaque, uint32_t addr, uint32_t data)
 219{
 220    IORange *ioport = opaque;
 221
 222    ioport->ops->write(ioport, addr - ioport->base, 4, data);
 223}
 224
 225void ioport_register(IORange *ioport)
 226{
 227    register_ioport_read(ioport->base, ioport->len, 1,
 228                         ioport_readb_thunk, ioport);
 229    register_ioport_read(ioport->base, ioport->len, 2,
 230                         ioport_readw_thunk, ioport);
 231    register_ioport_read(ioport->base, ioport->len, 4,
 232                         ioport_readl_thunk, ioport);
 233    register_ioport_write(ioport->base, ioport->len, 1,
 234                          ioport_writeb_thunk, ioport);
 235    register_ioport_write(ioport->base, ioport->len, 2,
 236                          ioport_writew_thunk, ioport);
 237    register_ioport_write(ioport->base, ioport->len, 4,
 238                          ioport_writel_thunk, ioport);
 239}
 240
 241void isa_unassign_ioport(pio_addr_t start, int length)
 242{
 243    int i;
 244
 245    for(i = start; i < start + length; i++) {
 246        ioport_read_table[0][i] = default_ioport_readb;
 247        ioport_read_table[1][i] = default_ioport_readw;
 248        ioport_read_table[2][i] = default_ioport_readl;
 249
 250        ioport_write_table[0][i] = default_ioport_writeb;
 251        ioport_write_table[1][i] = default_ioport_writew;
 252        ioport_write_table[2][i] = default_ioport_writel;
 253
 254        ioport_opaque[i] = NULL;
 255    }
 256}
 257
 258/***********************************************************/
 259
 260void cpu_outb(pio_addr_t addr, uint8_t val)
 261{
 262    LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
 263    trace_cpu_out(addr, val);
 264    ioport_write(0, addr, val);
 265}
 266
 267void cpu_outw(pio_addr_t addr, uint16_t val)
 268{
 269    LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
 270    trace_cpu_out(addr, val);
 271    ioport_write(1, addr, val);
 272}
 273
 274void cpu_outl(pio_addr_t addr, uint32_t val)
 275{
 276    LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
 277    trace_cpu_out(addr, val);
 278    ioport_write(2, addr, val);
 279}
 280
 281uint8_t cpu_inb(pio_addr_t addr)
 282{
 283    uint8_t val;
 284    val = ioport_read(0, addr);
 285    trace_cpu_in(addr, val);
 286    LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
 287    return val;
 288}
 289
 290uint16_t cpu_inw(pio_addr_t addr)
 291{
 292    uint16_t val;
 293    val = ioport_read(1, addr);
 294    trace_cpu_in(addr, val);
 295    LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
 296    return val;
 297}
 298
 299uint32_t cpu_inl(pio_addr_t addr)
 300{
 301    uint32_t val;
 302    val = ioport_read(2, addr);
 303    trace_cpu_in(addr, val);
 304    LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
 305    return val;
 306}
 307