From: Helge Deller <deller@gmx.de>

Linux writes zeroes at bootup into the default ports for LASI audio and
LASI floppy controller to reset those devices.  Allow writing to those
registers to avoid HPMCs.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 hw/misc/lasi.c         | 11 +++++++++++
 include/hw/misc/lasi.h |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/hw/misc/lasi.c b/hw/misc/lasi.c
index 9cfa5bb316..970fc98b5c 100644
--- a/hw/misc/lasi.c
+++ b/hw/misc/lasi.c
@@ -36,10 +36,13 @@ static bool lasi_chip_mem_valid(void *opaque, hwaddr addr,
     case LASI_IAR:
 
     case LASI_LPT:
+    case LASI_AUDIO:
+    case LASI_AUDIO + 4:
     case LASI_UART:
     case LASI_LAN:
     case LASI_LAN + 12: /* LASI LAN MAC */
     case LASI_RTC:
+    case LASI_FDC:
 
     case LASI_PCR ... LASI_AMR:
         ret = true;
@@ -80,6 +83,7 @@ static MemTxResult lasi_chip_read_with_attrs(void *opaque, hwaddr addr,
     case LASI_UART:
     case LASI_LAN:
     case LASI_LAN + 12:
+    case LASI_FDC:
         val = 0;
         break;
     case LASI_RTC:
@@ -145,12 +149,19 @@ static MemTxResult lasi_chip_write_with_attrs(void *opaque, hwaddr addr,
     case LASI_LPT:
         /* XXX: reset parallel port */
         break;
+    case LASI_AUDIO:
+    case LASI_AUDIO + 4:
+        /* XXX: reset audio port */
+        break;
     case LASI_UART:
         /* XXX: reset serial port */
         break;
     case LASI_LAN:
         /* XXX: reset LAN card */
         break;
+    case LASI_FDC:
+        /* XXX: reset Floppy controller */
+        break;
     case LASI_RTC:
         s->rtc_ref = val - time(NULL);
         break;
diff --git a/include/hw/misc/lasi.h b/include/hw/misc/lasi.h
index 0a8c7352be..f01c0f680a 100644
--- a/include/hw/misc/lasi.h
+++ b/include/hw/misc/lasi.h
@@ -26,9 +26,11 @@ OBJECT_DECLARE_SIMPLE_TYPE(LasiState, LASI_CHIP)
 #define LASI_IAR        0x10
 
 #define LASI_LPT        0x02000
+#define LASI_AUDIO      0x04000
 #define LASI_UART       0x05000
 #define LASI_LAN        0x07000
 #define LASI_RTC        0x09000
+#define LASI_FDC        0x0A000
 
 #define LASI_PCR        0x0C000 /* LASI Power Control register */
 #define LASI_ERRLOG     0x0C004 /* LASI Error Logging register */
-- 
2.43.0