From: Alan Cox <alan@linux.intel.com>
Date: Sat, 19 Jan 2019 21:38:29 +0000 (+0000)
Subject: pcw8256: static tty buffers and basis for nice tty wakeups later
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=5612a206046357d1aa7ef0c7ac6f782f2a26785d;p=FUZIX.git

pcw8256: static tty buffers and basis for nice tty wakeups later
---

diff --git a/Kernel/platform-pcw8256/devtty.c b/Kernel/platform-pcw8256/devtty.c
index f7dca186..caa0c53a 100644
--- a/Kernel/platform-pcw8256/devtty.c
+++ b/Kernel/platform-pcw8256/devtty.c
@@ -22,9 +22,11 @@ __sfr __at 0xE4	ctc0;
 __sfr __at 0xE5 ctc1;
 __sfr __at 0xE7 ctcmode;
 
-char tbuf1[TTYSIZ];
-char tbuf2[TTYSIZ];
-char tbuf3[TTYSIZ];
+static char tbuf1[TTYSIZ];
+static char tbuf2[TTYSIZ];
+static char tbuf3[TTYSIZ];
+
+static uint8_t sleeping;
 
 struct  s_queue  ttyinq[NUM_DEV_TTY+1] = {       /* ttyinq[0] is never used */
     {   NULL,    NULL,    NULL,    0,        0,       0    },
@@ -106,11 +108,19 @@ void tty_irq(void)
         c = dart0d;
         tty_inproc(2, c);
     }
+    if ((s & 4) && (sleeping & 4)) {
+	tty_outproc(2);
+	sleeping &= ~4;
+    }
     s = dartrr(3, 0);
     if (s & 1) {
         c = dart0d;
         tty_inproc(2, c);
     }
+    if ((s & 4) && (sleeping & 8)) {
+	tty_outproc(3);
+	sleeping &= ~8;
+    }
 }
 
 /* Called to set baud rate etc */
@@ -128,7 +138,7 @@ int tty_carrier(uint8_t minor)
 
 void tty_sleeping(uint8_t minor)
 {
-    minor;
+	sleeping |= (1 << minor);
 }
 
 void tty_data_consumed(uint8_t minor)