+
+#ifdef CONFIG_CONSOLE_POLL
+/* Serial polling routines for writing and reading from the uart while
+ * in an interrupt or debug context.
+ */
+
+#define GDB_BUF_SIZE 512 /* power of 2, please */
+
+static char poll_buf[GDB_BUF_SIZE];
+static char *pollp;
+static int poll_chars;
+
+static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo)
+{
+ u_char c, *cp;
+ volatile cbd_t *bdp;
+ int i;
+
+ /* Get the address of the host memory buffer.
+ */
+ bdp = pinfo->rx_cur;
+ while (bdp->cbd_sc & BD_SC_EMPTY)
+ ;
+
+ /* If the buffer address is in the CPM DPRAM, don't
+ * convert it.
+ */
+ cp = cpm2cpu_addr(bdp->cbd_bufaddr, pinfo);
+
+ if (obuf) {
+ i = c = bdp->cbd_datlen;
+ while (i-- > 0)
+ *obuf++ = *cp++;
+ } else
+ c = *cp;
+ bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID);
+ bdp->cbd_sc |= BD_SC_EMPTY;
+
+ if (bdp->cbd_sc & BD_SC_WRAP)
+ bdp = pinfo->rx_bd_base;
+ else
+ bdp++;
+ pinfo->rx_cur = (cbd_t *)bdp;
+
+ return (int)c;
+}
+
+static int cpm_get_poll_char(struct uart_port *port)
+{
+ struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+
+ if (!serial_polled) {
+ serial_polled = 1;
+ poll_chars = 0;
+ }
+ if (poll_chars <= 0) {
+ poll_chars = poll_wait_key(poll_buf, pinfo);
+ pollp = poll_buf;
+ }
+ poll_chars--;
+ return *pollp++;
+}
+
+static void cpm_put_poll_char(struct uart_port *port,
+ unsigned char c)
+{
+ struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+ static char ch[2];
+
+ ch[0] = (char)c;
+ cpm_uart_early_write(pinfo->port.line, ch, 1);
+}
+#endif /* CONFIG_CONSOLE_POLL */
+