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write to both IDE drives - return 0 for not present drives

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@672 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-03-20 22:01:15 +00:00
parent baca51faff
commit c45c3d0059
1 changed files with 43 additions and 14 deletions
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43
hw/ide.c
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@ -1060,7 +1060,7 @@ static void cdrom_change_cb(void *opaque)
static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val) static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{ {
IDEState *ide_if = opaque; IDEState *ide_if = opaque;
IDEState *s = ide_if->cur_drive; IDEState *s;
int unit, n; int unit, n;
#ifdef DEBUG_IDE #ifdef DEBUG_IDE
@ -1071,28 +1071,35 @@ static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
case 0: case 0:
break; break;
case 1: case 1:
s->feature = val; /* NOTE: data is written to the two drives */
ide_if[0].feature = val;
ide_if[1].feature = val;
break; break;
case 2: case 2:
if (val == 0) if (val == 0)
val = 256; val = 256;
s->nsector = val; ide_if[0].nsector = val;
ide_if[1].nsector = val;
break; break;
case 3: case 3:
s->sector = val; ide_if[0].sector = val;
ide_if[1].sector = val;
break; break;
case 4: case 4:
s->lcyl = val; ide_if[0].lcyl = val;
ide_if[1].lcyl = val;
break; break;
case 5: case 5:
s->hcyl = val; ide_if[0].hcyl = val;
ide_if[1].hcyl = val;
break; break;
case 6: case 6:
ide_if[0].select = val & 0x4f;
ide_if[1].select = val & 0x4f;
/* select drive */ /* select drive */
unit = (val >> 4) & 1; unit = (val >> 4) & 1;
s = ide_if + unit; s = ide_if + unit;
ide_if->cur_drive = s; ide_if->cur_drive = s;
s->select = val;
break; break;
default: default:
case 7: case 7:
@ -1100,6 +1107,7 @@ static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
#if defined(DEBUG_IDE) #if defined(DEBUG_IDE)
printf("ide: CMD=%02x\n", val); printf("ide: CMD=%02x\n", val);
#endif #endif
s = ide_if->cur_drive;
switch(val) { switch(val) {
case WIN_IDENTIFY: case WIN_IDENTIFY:
if (s->bs && !s->is_cdrom) { if (s->bs && !s->is_cdrom) {
@ -1228,25 +1236,46 @@ static uint32_t ide_ioport_read(void *opaque, uint32_t addr1)
ret = 0xff; ret = 0xff;
break; break;
case 1: case 1:
if (!s->bs)
ret = 0;
else
ret = s->error; ret = s->error;
break; break;
case 2: case 2:
if (!s->bs)
ret = 0;
else
ret = s->nsector & 0xff; ret = s->nsector & 0xff;
break; break;
case 3: case 3:
if (!s->bs)
ret = 0;
else
ret = s->sector; ret = s->sector;
break; break;
case 4: case 4:
if (!s->bs)
ret = 0;
else
ret = s->lcyl; ret = s->lcyl;
break; break;
case 5: case 5:
if (!s->bs)
ret = 0;
else
ret = s->hcyl; ret = s->hcyl;
break; break;
case 6: case 6:
if (!s->bs)
ret = 0;
else
ret = s->select; ret = s->select;
break; break;
default: default:
case 7: case 7:
if (!s->bs)
ret = 0;
else
ret = s->status; ret = s->status;
pic_set_irq(s->irq, 0); pic_set_irq(s->irq, 0);
break; break;