diff options
| -rw-r--r-- | hw/char/pl011.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/hw/char/pl011.c b/hw/char/pl011.c index 0f9a5cd16d..f0df58f7a9 100644 --- a/hw/char/pl011.c +++ b/hw/char/pl011.c @@ -85,7 +85,9 @@ DeviceState *pl011_create(hwaddr addr, qemu_irq irq, Chardev *chr) #define CR_OUT1 (1 << 12) #define CR_RTS (1 << 11) #define CR_DTR (1 << 10) +#define CR_TXE (1 << 8) #define CR_LBE (1 << 7) +#define CR_UARTEN (1 << 0) /* Integer Baud Rate Divider, UARTIBRD */ #define IBRD_MASK 0x3f @@ -223,7 +225,14 @@ static void pl011_loopback_tx(PL011State *s, uint32_t value) static void pl011_write_txdata(PL011State *s, uint8_t data) { - /* ??? Check if transmitter is enabled. */ + if (!(s->cr & CR_UARTEN)) { + qemu_log_mask(LOG_GUEST_ERROR, + "PL011 data written to disabled UART\n"); + } + if (!(s->cr & CR_TXE)) { + qemu_log_mask(LOG_GUEST_ERROR, + "PL011 data written to disabled TX UART\n"); + } /* * XXX this blocks entire thread. Rewrite to use |