xnu-792.21.3.tar.gz

[apple/xnu.git] / osfmk / ppc / serial_io.c

diff --git a/osfmk/ppc/serial_io.c b/osfmk/ppc/serial_io.c
index 9c546c5c8538b2c21c8f4364e414f11b54ce8f99..425570b128279384e0262ee10dbf309ada276e79 100644 (file)
--- a/osfmk/ppc/serial_io.c
+++ b/osfmk/ppc/serial_io.c
@@ -107,6 +107,8 @@ extern unsigned int disableSerialOuput;
 int    serial_initted = 0;
 unsigned int scc_parm_done = 0;
 
+extern unsigned int serialmode;
+
 static struct scc_byte {
        unsigned char   reg;
        unsigned char   val;
@@ -403,17 +405,6 @@ again:
        return c;
 }
 
-
-/*
- *     This front-ends scc_getc to make some intel changes easier
- */
- 
-int _serial_getc(int unit, int line, boolean_t wait, boolean_t raw) {
-
-       return(scc_getc(unit, line, wait, raw));
-
-}
-
 /*
  * Put a char on a specific SCC line
  * use splhigh since we might be doing a printf in high spl'd code
@@ -662,5 +653,55 @@ scc_param(struct scc_tty *tp)
 
 }
 
+/*
+ *  This routine will start a thread that polls the serial port, listening for
+ *  characters that have been typed.
+ */
+
+void
+serial_keyboard_init(void)
+{
+       kern_return_t   result;
+       thread_t                thread;
+
+       if(!(serialmode & 2)) return;           /* Leave if we do not want a serial console */
+
+       kprintf("Serial keyboard started\n");
+       result = kernel_thread_start_priority((thread_continue_t)serial_keyboard_start, NULL, MAXPRI_KERNEL, &thread);
+       if (result != KERN_SUCCESS)
+               panic("serial_keyboard_init");
+
+       thread_deallocate(thread);
+}
+
+void
+serial_keyboard_start(void)
+{
+       serial_keyboard_poll();                 /* Go see if there are any characters pending now */
+       panic("serial_keyboard_start: we can't get back here\n");
+}
+
+static int ptestxxx = 0;
+
+void
+serial_keyboard_poll(void)
+{
+       int chr;
+       uint64_t next;
+       extern void cons_cinput(char ch);       /* The BSD routine that gets characters */
+
+
+       while(1) {                              /* Do this for a while */
+               chr = scc_getc(0, 1, 0, 1);     /* Get a character if there is one */
+               if(chr < 0) break;              /* The serial buffer is empty */
+               cons_cinput((char)chr);         /* Buffer up the character */
+       }
+
+       clock_interval_to_deadline(16, 1000000, &next); /* Get time of pop */
+
+       assert_wait_deadline((event_t)serial_keyboard_poll, THREAD_UNINT, next);        /* Show we are "waiting" */
+       thread_block((thread_continue_t)serial_keyboard_poll);  /* Wait for it */
+       panic("serial_keyboard_poll: Shouldn't never ever get here...\n");
+}
 
 #endif /* NSCC > 0 */