diff options
| -rw-r--r-- | hw/scsi/esp.c | 11 | ||||
| -rw-r--r-- | include/hw/scsi/esp.h | 1 |
2 files changed, 10 insertions, 2 deletions
diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 5ab44d860b..272d13d633 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -364,7 +364,7 @@ void esp_hard_reset(ESPState *s) { memset(s->rregs, 0, ESP_REGS); memset(s->wregs, 0, ESP_REGS); - s->rregs[ESP_TCHI] = s->chip_id; + s->tchi_written = 0; s->ti_size = 0; s->ti_rptr = 0; s->ti_wptr = 0; @@ -422,6 +422,11 @@ uint64_t esp_reg_read(ESPState *s, uint32_t saddr) esp_lower_irq(s); return old_val; + case ESP_TCHI: + /* Return the unique id if the value has never been written */ + if (!s->tchi_written) { + return s->chip_id; + } default: break; } @@ -432,9 +437,11 @@ void esp_reg_write(ESPState *s, uint32_t saddr, uint64_t val) { trace_esp_mem_writeb(saddr, s->wregs[saddr], val); switch (saddr) { + case ESP_TCHI: + s->tchi_written = true; + /* fall through */ case ESP_TCLO: case ESP_TCMID: - case ESP_TCHI: s->rregs[ESP_RSTAT] &= ~STAT_TC; break; case ESP_FIFO: diff --git a/include/hw/scsi/esp.h b/include/hw/scsi/esp.h index e079fb8d16..6c795276c9 100644 --- a/include/hw/scsi/esp.h +++ b/include/hw/scsi/esp.h @@ -22,6 +22,7 @@ struct ESPState { uint8_t wregs[ESP_REGS]; qemu_irq irq; uint8_t chip_id; + bool tchi_written; int32_t ti_size; uint32_t ti_rptr, ti_wptr; uint32_t status; |