From 6f84da3a07668ce881a0c853390eb05313d61157 Mon Sep 17 00:00:00 2001 From: Peter Lieven Date: Mon, 12 Jan 2015 10:45:17 +0100 Subject: [PATCH] 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: Peter Lieven Signed-off-by: Paolo Bonzini --- hw/scsi/lsi53c895a.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index ec920488d6..db7d4b8c9c 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -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 */ -- GitLab