hw/ide/mmio.c

   1 /*
   2  * QEMU IDE Emulation: mmio support (for embedded).
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  * Copyright (c) 2006 Openedhand Ltd.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25 #include <hw/hw.h>
  26 #include "block.h"
  27 #include "block_int.h"
  28 #include "sysemu.h"
  29 #include "dma.h"
  30
  31 #include <hw/ide/internal.h>
  32
  33 /***********************************************************/
  34 /* MMIO based ide port
  35  * This emulates IDE device connected directly to the CPU bus without
  36  * dedicated ide controller, which is often seen on embedded boards.
  37  */
  38
  39 typedef struct {
  40     IDEBus bus;
  41     int shift;
  42 } MMIOState;
  43
  44 static uint32_t mmio_ide_read (void *opaque, target_phys_addr_t addr)
  45 {
  46     MMIOState *s = opaque;
  47     addr >>= s->shift;
  48     if (addr & 7)
  49         return ide_ioport_read(&s->bus, addr);
  50     else
  51         return ide_data_readw(&s->bus, 0);
  52 }
  53
  54 static void mmio_ide_write (void *opaque, target_phys_addr_t addr,
  55         uint32_t val)
  56 {
  57     MMIOState *s = opaque;
  58     addr >>= s->shift;
  59     if (addr & 7)
  60         ide_ioport_write(&s->bus, addr, val);
  61     else
  62         ide_data_writew(&s->bus, 0, val);
  63 }
  64
  65 static CPUReadMemoryFunc * const mmio_ide_reads[] = {
  66     mmio_ide_read,
  67     mmio_ide_read,
  68     mmio_ide_read,
  69 };
  70
  71 static CPUWriteMemoryFunc * const mmio_ide_writes[] = {
  72     mmio_ide_write,
  73     mmio_ide_write,
  74     mmio_ide_write,
  75 };
  76
  77 static uint32_t mmio_ide_status_read (void *opaque, target_phys_addr_t addr)
  78 {
  79     MMIOState *s= opaque;
  80     return ide_status_read(&s->bus, 0);
  81 }
  82
  83 static void mmio_ide_cmd_write (void *opaque, target_phys_addr_t addr,
  84         uint32_t val)
  85 {
  86     MMIOState *s = opaque;
  87     ide_cmd_write(&s->bus, 0, val);
  88 }
  89
  90 static CPUReadMemoryFunc * const mmio_ide_status[] = {
  91     mmio_ide_status_read,
  92     mmio_ide_status_read,
  93     mmio_ide_status_read,
  94 };
  95
  96 static CPUWriteMemoryFunc * const mmio_ide_cmd[] = {
  97     mmio_ide_cmd_write,
  98     mmio_ide_cmd_write,
  99     mmio_ide_cmd_write,
 100 };
 101
 102 static const VMStateDescription vmstate_ide_mmio = {
 103     .name = "mmio-ide",
 104     .version_id = 3,
 105     .minimum_version_id = 0,
 106     .minimum_version_id_old = 0,
 107     .fields      = (VMStateField []) {
 108         VMSTATE_IDE_BUS(bus, MMIOState),
 109         VMSTATE_IDE_DRIVES(bus.ifs, MMIOState),
 110         VMSTATE_END_OF_LIST()
 111     }
 112 };
 113
 114 void mmio_ide_init (target_phys_addr_t membase, target_phys_addr_t membase2,
 115                     qemu_irq irq, int shift,
 116                     DriveInfo *hd0, DriveInfo *hd1)
 117 {
 118     MMIOState *s = qemu_mallocz(sizeof(MMIOState));
 119     int mem1, mem2;
 120
 121     ide_init2(&s->bus, hd0, hd1, irq);
 122
 123     s->shift = shift;
 124
 125     mem1 = cpu_register_io_memory(mmio_ide_reads, mmio_ide_writes, s);
 126     mem2 = cpu_register_io_memory(mmio_ide_status, mmio_ide_cmd, s);
 127     cpu_register_physical_memory(membase, 16 << shift, mem1);
 128     cpu_register_physical_memory(membase2, 2 << shift, mem2);
 129     vmstate_register(0, &vmstate_ide_mmio, s);
 130 }
 131