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Windows 2000 install disk full hack (original idea from Vladimir N. Oleynik)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1428 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-04-30 16:10:35 +00:00
parent b671f9ed2d
commit a09db21f71
4 changed files with 43 additions and 3 deletions
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26
hw/ide.c
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@ -332,6 +332,7 @@ typedef struct IDEState {
uint8_t *data_ptr;
uint8_t *data_end;
uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
QEMUTimer *sector_write_timer; /* only used for win2k instal hack */
} IDEState;
#define BM_STATUS_DMAING 0x01
@ -645,6 +646,12 @@ static void ide_sector_read_dma(IDEState *s)
ide_dma_start(s, ide_read_dma_cb);
}
static void ide_sector_write_timer_cb(void *opaque)
{
IDEState *s = opaque;
ide_set_irq(s);
}
static void ide_sector_write(IDEState *s)
{
int64_t sector_num;
@ -670,7 +677,22 @@ static void ide_sector_write(IDEState *s)
ide_transfer_start(s, s->io_buffer, 512 * n1, ide_sector_write);
}
ide_set_sector(s, sector_num + n);
ide_set_irq(s);
#ifdef TARGET_I386
if (win2k_install_hack) {
/* It seems there is a bug in the Windows 2000 installer HDD
IDE driver which fills the disk with empty logs when the
IDE write IRQ comes too early. This hack tries to correct
that at the expense of slower write performances. Use this
option _only_ to install Windows 2000. You must disable it
for normal use. */
qemu_mod_timer(s->sector_write_timer,
qemu_get_clock(vm_clock) + (ticks_per_sec / 1000));
} else
#endif
{
ide_set_irq(s);
}
}
static int ide_write_dma_cb(IDEState *s,
@ -1939,6 +1961,8 @@ static void ide_init2(IDEState *ide_state, int irq,
}
s->drive_serial = drive_serial++;
s->irq = irq;
s->sector_write_timer = qemu_new_timer(vm_clock,
ide_sector_write_timer_cb, s);
ide_reset(s);
}
}