lsi53c895a: Implement Scratch Byte Register
Fixes the following errors: lsi_scsi: error: Unhandled writeb 0x3a = 0x0 lsi_scsi: error: readb 0x3a Signed-off-by: Sebastian Herbszt <herbszt@gmx.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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28c2c26495
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@ -262,6 +262,7 @@ typedef struct {
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uint32_t sbc;
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uint32_t csbc;
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uint32_t scratch[18]; /* SCRATCHA-SCRATCHR */
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uint8_t sbr;
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/* Script ram is stored as 32-bit words in host byteorder. */
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uint32_t script_ram[2048];
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@ -330,6 +331,7 @@ static void lsi_soft_reset(LSIState *s)
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s->ia = 0;
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s->sbc = 0;
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s->csbc = 0;
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s->sbr = 0;
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}
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static int lsi_dma_40bit(LSIState *s)
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@ -1408,6 +1410,8 @@ static uint8_t lsi_reg_readb(LSIState *s, int offset)
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return s->dmode;
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case 0x39: /* DIEN */
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return s->dien;
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case 0x3a: /* SBR */
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return s->sbr;
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case 0x3b: /* DCNTL */
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return s->dcntl;
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case 0x40: /* SIEN0 */
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@ -1622,6 +1626,9 @@ static void lsi_reg_writeb(LSIState *s, int offset, uint8_t val)
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s->dien = val;
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lsi_update_irq(s);
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break;
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case 0x3a: /* SBR */
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s->sbr = val;
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break;
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case 0x3b: /* DCNTL */
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s->dcntl = val & ~(LSI_DCNTL_PFF | LSI_DCNTL_STD);
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if ((val & LSI_DCNTL_STD) && (s->istat1 & LSI_ISTAT1_SRUN) == 0)
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