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ahci: set ahci mode on reset 

ATM we set AHCI mode on 1st GHC write.
Spec says we should set it on reset.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-09-29 00:09:35 +03:00 committed by Kevin Wolf
parent 975a93c082
commit 13164591f3
1 changed files with 9 additions and 1 deletions
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10
hw/ide/ahci.c
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@ -1198,7 +1198,15 @@ void ahci_reset(AHCIState *s)
int i; int i;
s->control_regs.irqstatus = 0; s->control_regs.irqstatus = 0;
s->control_regs.ghc = 0; /* AHCI Enable (AE)
* The implementation of this bit is dependent upon the value of the
* CAP.SAM bit. If CAP.SAM is '0', then GHC.AE shall be read-write and
* shall have a reset value of '0'. If CAP.SAM is '1', then AE shall be
* read-only and shall have a reset value of '1'.
*
* We set HOST_CAP_AHCI so we must enable AHCI at reset.
*/
s->control_regs.ghc = HOST_CTL_AHCI_EN;
for (i = 0; i < s->ports; i++) { for (i = 0; i < s->ports; i++) {
pr = &s->dev[i].port_regs; pr = &s->dev[i].port_regs;