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-rw-r--r--arch/i386/boot/tty.c112
1 files changed, 0 insertions, 112 deletions
diff --git a/arch/i386/boot/tty.c b/arch/i386/boot/tty.c
deleted file mode 100644
index f3f14bd26371..000000000000
--- a/arch/i386/boot/tty.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/* -*- linux-c -*- ------------------------------------------------------- *
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright 2007 rPath, Inc. - All Rights Reserved
- *
- * This file is part of the Linux kernel, and is made available under
- * the terms of the GNU General Public License version 2.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * arch/i386/boot/tty.c
- *
- * Very simple screen I/O
- * XXX: Probably should add very simple serial I/O?
- */
-
-#include "boot.h"
-
-/*
- * These functions are in .inittext so they can be used to signal
- * error during initialization.
- */
-
-void __attribute__((section(".inittext"))) putchar(int ch)
-{
- unsigned char c = ch;
-
- if (c == '\n')
- putchar('\r'); /* \n -> \r\n */
-
- /* int $0x10 is known to have bugs involving touching registers
- it shouldn't. Be extra conservative... */
- asm volatile("pushal; pushw %%ds; int $0x10; popw %%ds; popal"
- : : "b" (0x0007), "c" (0x0001), "a" (0x0e00|ch));
-}
-
-void __attribute__((section(".inittext"))) puts(const char *str)
-{
- int n = 0;
- while (*str) {
- putchar(*str++);
- n++;
- }
-}
-
-/*
- * Read the CMOS clock through the BIOS, and return the
- * seconds in BCD.
- */
-
-static u8 gettime(void)
-{
- u16 ax = 0x0200;
- u16 cx, dx;
-
- asm volatile("int $0x1a"
- : "+a" (ax), "=c" (cx), "=d" (dx)
- : : "ebx", "esi", "edi");
-
- return dx >> 8;
-}
-
-/*
- * Read from the keyboard
- */
-int getchar(void)
-{
- u16 ax = 0;
- asm volatile("int $0x16" : "+a" (ax));
-
- return ax & 0xff;
-}
-
-static int kbd_pending(void)
-{
- u8 pending;
- asm volatile("int $0x16; setnz %0"
- : "=rm" (pending)
- : "a" (0x0100));
- return pending;
-}
-
-void kbd_flush(void)
-{
- for (;;) {
- if (!kbd_pending())
- break;
- getchar();
- }
-}
-
-int getchar_timeout(void)
-{
- int cnt = 30;
- int t0, t1;
-
- t0 = gettime();
-
- while (cnt) {
- if (kbd_pending())
- return getchar();
-
- t1 = gettime();
- if (t0 != t1) {
- cnt--;
- t0 = t1;
- }
- }
-
- return 0; /* Timeout! */
-}