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ide: perform SRST as early as possible 

We don't need to wait for the falling edge. We can set BSY as
soon as possible and begin immediately resetting the drive. Devices
don't appear to need to take any specific action on the falling edge.

Signed-off-by: John Snow <jsnow@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-id: 20201020200242.1497705-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2020-10-20 16:02:41 -04:00
parent 4ac4e7281a
commit b45bcd81e0
1 changed files with 1 additions and 3 deletions
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4
hw/ide/core.c
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@ -2280,9 +2280,7 @@ void ide_ctrl_write(void *opaque, uint32_t addr, uint32_t val)
/* Device0 and Device1 each have their own control register,
* but QEMU models it as just one register in the controller. */
if ((bus->cmd & IDE_CTRL_RESET) &&
!(val & IDE_CTRL_RESET)) {
/* SRST triggers on falling edge */
if (!(bus->cmd & IDE_CTRL_RESET) && (val & IDE_CTRL_RESET)) {
for (i = 0; i < 2; i++) {
s = &bus->ifs[i];
s->status |= BUSY_STAT;