Re: port-sparc/46530 (Install failure of NetBSD/sparc 5.1.2 and 6.0_BETA2 on qemu-1.0.1 and 1.1.0)

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR port-sparc/46530; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: martin%NetBSD.org@localhost, ryoon%NetBSD.org@localhost, 
tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-sparc/46530 (Install failure of NetBSD/sparc 5.1.2 and 
6.0_BETA2
         on qemu-1.0.1 and 1.1.0)
Date: Mon, 24 Sep 2012 05:07:54 +0900

 > I think this is a qemu bug - I'll look at it.
 
 It looks qemu's esp.c has some inconsistent ops around
 DMA command xfer termination.
 
 The following patch for qemu-1.2.0 would suppress most warning messages.
 (still not sure what it actually tries though)
 
 --- qemu-1.2.0/hw/esp.c.orig   2012-09-05 23:03:06.000000000 +0900
 +++ qemu-1.2.0/hw/esp.c        2012-09-24 04:57:37.000000000 +0900
 @@ -91,6 +91,10 @@
          dmalen |= s->rregs[ESP_TCMID] << 8;
          dmalen |= s->rregs[ESP_TCHI] << 16;
          s->dma_memory_read(s->dma_opaque, buf, dmalen);
 +        s->rregs[ESP_RSTAT] |= STAT_TC;
 +        s->rregs[ESP_TCLO] = 0;
 +        s->rregs[ESP_TCMID] = 0;
 +        s->rregs[ESP_TCHI] = 0;
      } else {
          dmalen = s->ti_size;
          memcpy(buf, s->ti_buf, dmalen);
 @@ -242,6 +246,10 @@
      if (s->do_cmd) {
          trace_esp_do_dma(s->cmdlen, len);
          s->dma_memory_read(s->dma_opaque, &s->cmdbuf[s->cmdlen], len);
 +        s->rregs[ESP_RSTAT] |= STAT_TC;
 +        s->rregs[ESP_TCLO] = 0;
 +        s->rregs[ESP_TCMID] = 0;
 +        s->rregs[ESP_TCHI] = 0;
          s->ti_size = 0;
          s->cmdlen = 0;
          s->do_cmd = 0;
 
 ---
 Izumi Tsutsui