diff options
Diffstat (limited to 'hw/ide.c')
| -rw-r--r-- | hw/ide.c | 26 |
1 files changed, 25 insertions, 1 deletions
@@ -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); } } |