Commit 6f84da3a authored by Peter Lieven's avatar Peter Lieven Committed by Paolo Bonzini
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hw/scsi/lsi53c895a: add support for additional diag / debug registers 



Some ancient Linux kernels read from registers 0x09 and 0x3c-3f during
boot. According to the spec these registers are for diag and debug
purposes only. If they are absend qemu aborts on read.

Signed-off-by: default avatarPeter Lieven <pl@kamp.de>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent e1660dc5

hw/scsi/lsi53c895a.c

+6 −0
Original line number Diff line number Diff line
@@ -277,6 +277,7 @@ typedef struct { 
    uint32_t csbc;

    uint32_t scratch[18]; /* SCRATCHA-SCRATCHR */

    uint8_t sbr;

    uint32_t adder;



    /* Script ram is stored as 32-bit words in host byteorder.  */

    uint32_t script_ram[2048];
@@ -1389,6 +1390,7 @@ again: 
                switch ((insn >> 27) & 7) {

                case 0: /* Jump */

                    DPRINTF("Jump to 0x%08x\n", addr);

                    s->adder = addr;

                    s->dsp = addr;

                    break;

                case 1: /* Call */
@@ -1513,6 +1515,8 @@ static uint8_t lsi_reg_readb(LSIState *s, int offset) 
        return 0x7f;

    case 0x08: /* Revision ID */

        return 0x00;

    case 0x09: /* SOCL */

        return s->socl;

    case 0xa: /* SSID */

        return s->ssid;

    case 0xb: /* SBCL */
@@ -1577,6 +1581,8 @@ static uint8_t lsi_reg_readb(LSIState *s, int offset) 
        return s->sbr;

    case 0x3b: /* DCNTL */

        return s->dcntl;

    /* ADDER Output (Debug of relative jump address) */

    CASE_GET_REG32(adder, 0x3c)

    case 0x40: /* SIEN0 */

        return s->sien0;

    case 0x41: /* SIEN1 */