From: Laurent Vivier <laurent@vivier.eu>
To: qemu-devel@nongnu.org
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>,
Laurent Vivier <laurent@vivier.eu>
Subject: [PULL 2/7] mac_via: fix up adb_via_receive() trace events
Date: Tue, 16 Mar 2021 22:16:26 +0100 [thread overview]
Message-ID: <20210316211631.107417-3-laurent@vivier.eu> (raw)
In-Reply-To: <20210316211631.107417-1-laurent@vivier.eu>
From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
The use of the post-increment operator on adb_data_in_index meant that the
trace-event was accidentally displaying the next byte in the incoming ADB
data buffer rather than the current byte.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210311100505.22596-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
hw/misc/mac_via.c | 41 ++++++++++++++++++++++++-----------------
1 file changed, 24 insertions(+), 17 deletions(-)
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index ca2f939dd588..0a25de577cf9 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -816,33 +816,37 @@ static void adb_via_receive(MacVIAState *s, int state, uint8_t *data)
switch (s->adb_data_in_index) {
case 0:
/* First EVEN byte: vADBInt indicates bus timeout */
- trace_via1_adb_receive(state == ADB_STATE_EVEN ? "EVEN" : " ODD",
- *data, (ms->b & VIA1B_vADBInt) ? "+" : "-",
- adb_bus->status, s->adb_data_in_index,
- s->adb_data_in_size);
-
- *data = s->adb_data_in[s->adb_data_in_index++];
+ *data = s->adb_data_in[s->adb_data_in_index];
if (adb_bus->status & ADB_STATUS_BUSTIMEOUT) {
ms->b &= ~VIA1B_vADBInt;
} else {
ms->b |= VIA1B_vADBInt;
}
- break;
- case 1:
- /* First ODD byte: vADBInt indicates SRQ */
trace_via1_adb_receive(state == ADB_STATE_EVEN ? "EVEN" : " ODD",
*data, (ms->b & VIA1B_vADBInt) ? "+" : "-",
adb_bus->status, s->adb_data_in_index,
s->adb_data_in_size);
- *data = s->adb_data_in[s->adb_data_in_index++];
+ s->adb_data_in_index++;
+ break;
+
+ case 1:
+ /* First ODD byte: vADBInt indicates SRQ */
+ *data = s->adb_data_in[s->adb_data_in_index];
pending = adb_bus->pending & ~(1 << (s->adb_autopoll_cmd >> 4));
if (pending) {
ms->b &= ~VIA1B_vADBInt;
} else {
ms->b |= VIA1B_vADBInt;
}
+
+ trace_via1_adb_receive(state == ADB_STATE_EVEN ? "EVEN" : " ODD",
+ *data, (ms->b & VIA1B_vADBInt) ? "+" : "-",
+ adb_bus->status, s->adb_data_in_index,
+ s->adb_data_in_size);
+
+ s->adb_data_in_index++;
break;
default:
@@ -852,14 +856,9 @@ static void adb_via_receive(MacVIAState *s, int state, uint8_t *data)
* end of the poll reply, so provide these extra bytes below to
* keep it happy
*/
- trace_via1_adb_receive(state == ADB_STATE_EVEN ? "EVEN" : " ODD",
- *data, (ms->b & VIA1B_vADBInt) ? "+" : "-",
- adb_bus->status, s->adb_data_in_index,
- s->adb_data_in_size);
-
if (s->adb_data_in_index < s->adb_data_in_size) {
/* Next data byte */
- *data = s->adb_data_in[s->adb_data_in_index++];
+ *data = s->adb_data_in[s->adb_data_in_index];
ms->b |= VIA1B_vADBInt;
} else if (s->adb_data_in_index == s->adb_data_in_size) {
if (adb_bus->status & ADB_STATUS_BUSTIMEOUT) {
@@ -869,7 +868,6 @@ static void adb_via_receive(MacVIAState *s, int state, uint8_t *data)
/* Return 0x0 after reply */
*data = 0;
}
- s->adb_data_in_index++;
ms->b &= ~VIA1B_vADBInt;
} else {
/* Bus timeout (no more data) */
@@ -878,6 +876,15 @@ static void adb_via_receive(MacVIAState *s, int state, uint8_t *data)
adb_bus->status = 0;
adb_autopoll_unblock(adb_bus);
}
+
+ trace_via1_adb_receive(state == ADB_STATE_EVEN ? "EVEN" : " ODD",
+ *data, (ms->b & VIA1B_vADBInt) ? "+" : "-",
+ adb_bus->status, s->adb_data_in_index,
+ s->adb_data_in_size);
+
+ if (s->adb_data_in_index <= s->adb_data_in_size) {
+ s->adb_data_in_index++;
+ }
break;
}
--
2.30.2
next prev parent reply other threads:[~2021-03-16 21:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 21:16 [PULL 0/7] Q800 for 6.0 patches Laurent Vivier
2021-03-16 21:16 ` [PULL 1/7] mac_via: switch rtc pram trace-events to use hex rather than decimal for addresses Laurent Vivier
2021-03-16 21:16 ` Laurent Vivier [this message]
2021-03-16 21:16 ` [PULL 3/7] mac_via: allow long accesses to VIA registers Laurent Vivier
2021-03-16 21:16 ` [PULL 4/7] mac_via: don't re-inject ADB response when switching to IDLE state Laurent Vivier
2021-03-16 21:16 ` [PULL 5/7] mac_via: rename VBL timer to 60Hz timer Laurent Vivier
2021-03-16 21:16 ` [PULL 6/7] mac_via: fix 60Hz VIA1 timer interval Laurent Vivier
2021-03-16 21:16 ` [PULL 7/7] mac_via: remove VIA1 timer optimisations Laurent Vivier
2021-03-18 11:13 ` [PULL 0/7] Q800 for 6.0 patches Peter Maydell
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