diff options
| author | John Snow <jsnow@redhat.com> | 2015-02-05 12:41:13 -0500 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-02-16 15:07:16 +0000 |
| commit | e83fd96bfab90298beaa8c8a31e48a905564180e (patch) | |
| tree | b4f6735beda0c6f555ad2cd17343951e7f1d4da7 /tests/libqos/ahci.c | |
| parent | e77448a385dc72fa671752ec11c84c931f316d09 (diff) | |
libqos/ahci: Add ahci_port_clear helper
Add a helper that assists in clearing out potentially old error and FIS
information from an AHCI port's data structures. This ensures we always
start with a blank slate for interrupt and FIS receipt information.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1423158090-25580-3-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/libqos/ahci.c')
| -rw-r--r-- | tests/libqos/ahci.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tests/libqos/ahci.c b/tests/libqos/ahci.c index 7ea55f90b7..3b1b9ba499 100644 --- a/tests/libqos/ahci.c +++ b/tests/libqos/ahci.c @@ -294,3 +294,19 @@ unsigned ahci_port_select(AHCIQState *ahci) g_assert(i < 32); return i; } + +/** + * Clear a port's interrupts and status information prior to a test. + */ +void ahci_port_clear(AHCIQState *ahci, uint8_t port) +{ + uint32_t reg; + + /* Clear out this port's interrupts (ignore the init register d2h fis) */ + reg = ahci_px_rreg(ahci, port, AHCI_PX_IS); + ahci_px_wreg(ahci, port, AHCI_PX_IS, reg); + g_assert_cmphex(ahci_px_rreg(ahci, port, AHCI_PX_IS), ==, 0); + + /* Wipe the FIS-Recieve Buffer */ + qmemset(ahci->port[port].fb, 0x00, 0x100); +} |