char: cadence: check baud rate generator and divider values

[mirror_qemu.git] / hw / char / cadence_uart.c

diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
index def34cd0d2a1723848bc2bfd9388e22eb52c1e0b..0215d6518de40f6f1cbb443774a20f45d0e125ab 100644 (file)
--- a/hw/char/cadence_uart.c
+++ b/hw/char/cadence_uart.c
@@ -1,6 +1,11 @@
 /*
  * Device model for Cadence UART
  *
+ * Reference: Xilinx Zynq 7000 reference manual
+ *   - http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf
+ *   - Chapter 19 UART Controller
+ *   - Appendix B for Register details
+ *
  * Copyright (c) 2010 Xilinx Inc.
  * Copyright (c) 2012 Peter A.G. Crosthwaite (peter.crosthwaite@petalogix.com)
  * Copyright (c) 2012 PetaLogix Pty Ltd.
@@ -402,6 +407,16 @@ static void uart_write(void *opaque, hwaddr offset,
             break;
         }
         break;
+    case R_BRGR: /* Baud rate generator */
+        if (value >= 0x01) {
+            s->r[offset] = value & 0xFFFF;
+        }
+        break;
+    case R_BDIV:    /* Baud rate divider */
+        if (value >= 0x04) {
+            s->r[offset] = value & 0xFF;
+        }
+        break;
     default:
         s->r[offset] = value;
     }