patch-2.1.44 linux/arch/mips/lib/tinycon.c

• Lines: 134
• Date: Thu Jun 26 12:33:37 1997
• Orig file: v2.1.43/linux/arch/mips/lib/tinycon.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.43/linux/arch/mips/lib/tinycon.c linux/arch/mips/lib/tinycon.c
@@ -0,0 +1,133 @@
+/*
+ * arch/mips/lib/console.c
+ *
+ * Copyright (C) 1994 by Waldorf Electronic,
+ * written by Ralf Baechle and Andreas Busse
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * FIXME: This file is hacked to be hardwired for the Deskstation
+ *        Only thought as a debugging console output.  It's as inefficient
+ *        as a piece of code can be but probably a good piece of code to
+ *        implement a preliminary console for a new target.
+ */
+
+#include <linux/tty.h>
+#include <asm/bootinfo.h>
+
+static unsigned int size_x;
+static unsigned int size_y;
+static unsigned short cursor_x;
+static unsigned short cursor_y;
+static volatile unsigned short *vram_addr;
+static int console_needs_init = 1;
+
+extern struct screen_info screen_info;
+
+/* ----------------------------------------------------------------------
+ * init_console()
+ * ---------------------------------------------------------------------- */
+
+void init_console(void)
+{
+  size_x = 80;
+  size_y = 25;
+  cursor_x = 0;
+  cursor_y = 0;
+
+  vram_addr = (unsigned short *)0xb00b8000;
+  
+  console_needs_init = 0;
+}
+
+void
+set_size_x(unsigned int x)
+{
+  size_x = x;
+}
+
+void
+set_size_y(unsigned int y)
+{
+  size_y = y;
+}
+
+void
+set_vram(unsigned short *vram)
+{
+  vram_addr = vram;
+}
+
+void
+set_crsr(unsigned int x, unsigned int y)
+{
+  cursor_x = x;
+  cursor_y = y;
+}
+
+void
+print_char(unsigned int x, unsigned int y, unsigned char c)
+{
+  volatile unsigned short *caddr;
+
+  caddr = vram_addr + (y * size_x) + x;
+  *caddr = (*caddr & 0xff00) | 0x0f00 | (unsigned short) c;
+}
+
+static void
+scroll(void)
+{
+  volatile unsigned short *caddr;
+  register int i;
+
+  caddr = vram_addr;
+  for(i=0; i<size_x * (size_y-1); i++)
+    *(caddr++) = *(caddr + size_x);
+
+  /* blank last line */
+  
+  caddr = vram_addr + (size_x * (size_y-1));
+  for(i=0; i<size_x; i++)
+    *(caddr++) = (*caddr & 0xff00) | (unsigned short) ' ';
+}
+
+void print_string(const unsigned char *str)
+{
+  unsigned char c;
+
+  if (console_needs_init)
+    init_console();
+
+  while((c = *str++))
+    switch(c)
+      {
+      case '\n':
+	cursor_x = 0;
+	cursor_y++;
+	if(cursor_y == size_y)
+	  {
+	    scroll();
+	    cursor_y = size_y - 1;
+	  }
+	break;
+
+      default:
+	print_char(cursor_x, cursor_y, c);
+	cursor_x++;
+	if(cursor_x == size_x)
+	  {
+	    cursor_x = 0;
+	    cursor_y++;
+	    if(cursor_y == size_y)
+	      {
+		scroll();
+		cursor_y = size_y - 1;
+	      }
+	  }
+	break;
+      }
+}
+
+/* end of file */