[Qemu-devel] [PATCH 1/3] lsi53c895a: Implement Scratch Byte Register

[Sebastian Herbszt]

Fixes the following errors:

lsi_scsi: error: Unhandled writeb 0x3a = 0x0
lsi_scsi: error: readb 0x3a

Signed-off-by: Sebastian Herbszt <address@hidden>

Index: qemu-3a2eeac0c9033e30b19d88465c9561f982e9e6d0/hw/lsi53c895a.c
===================================================================
--- qemu-3a2eeac0c9033e30b19d88465c9561f982e9e6d0.orig/hw/lsi53c895a.c
+++ qemu-3a2eeac0c9033e30b19d88465c9561f982e9e6d0/hw/lsi53c895a.c
@@ -262,6 +262,7 @@ typedef struct {
     uint32_t sbc;
     uint32_t csbc;
     uint32_t scratch[18]; /* SCRATCHA-SCRATCHR */
+    uint8_t sbr;
 
     /* Script ram is stored as 32-bit words in host byteorder.  */
     uint32_t script_ram[2048];
@@ -330,6 +331,7 @@ static void lsi_soft_reset(LSIState *s)
     s->ia = 0;
     s->sbc = 0;
     s->csbc = 0;
+    s->sbr = 0;
 }
 
 static int lsi_dma_40bit(LSIState *s)
@@ -1408,6 +1410,8 @@ static uint8_t lsi_reg_readb(LSIState *s
         return s->dmode;
     case 0x39: /* DIEN */
         return s->dien;
+    case 0x3a: /* SBR */
+        return s->sbr;
     case 0x3b: /* DCNTL */
         return s->dcntl;
     case 0x40: /* SIEN0 */
@@ -1622,6 +1626,9 @@ static void lsi_reg_writeb(LSIState *s, 
         s->dien = val;
         lsi_update_irq(s);
         break;
+    case 0x3a: /* SBR */
+        s->sbr = val;
+        break;
     case 0x3b: /* DCNTL */
         s->dcntl = val & ~(LSI_DCNTL_PFF | LSI_DCNTL_STD);
         if ((val & LSI_DCNTL_STD) && (s->istat1 & LSI_ISTAT1_SRUN) == 0)