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lasi: Add reset I/O ports for LASI audio and FDC

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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>
This commit is contained in:
Helge Deller 2024-02-03 01:04:45 +01:00
parent 9ccbe394d2
commit 32d26ea407
2 changed files with 13 additions and 0 deletions
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11
hw/misc/lasi.c
View File

@ -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;

2
include/hw/misc/lasi.h
View File

@ -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 */