1 files changed, 0 insertions, 165 deletions
diff --git a/ANDROID_3.4.5/arch/x86/boot/a20.c b/ANDROID_3.4.5/arch/x86/boot/a20.c
deleted file mode 100644
index 64a31a6d..00000000
--- a/ANDROID_3.4.5/arch/x86/boot/a20.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/* -*- linux-c -*- ------------------------------------------------------- *
- *
- *   Copyright (C) 1991, 1992 Linus Torvalds
- *   Copyright 2007-2008 rPath, Inc. - All Rights Reserved
- *   Copyright 2009 Intel Corporation; author H. Peter Anvin
- *
- *   This file is part of the Linux kernel, and is made available under
- *   the terms of the GNU General Public License version 2.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * Enable A20 gate (return -1 on failure)
- */
-
-#include "boot.h"
-
-#define MAX_8042_LOOPS	100000
-#define MAX_8042_FF	32
-
-static int empty_8042(void)
-{
-	u8 status;
-	int loops = MAX_8042_LOOPS;
-	int ffs   = MAX_8042_FF;
-
-	while (loops--) {
-		io_delay();
-
-		status = inb(0x64);
-		if (status == 0xff) {
-			/* FF is a plausible, but very unlikely status */
-			if (!--ffs)
-				return -1; /* Assume no KBC present */
-		}
-		if (status & 1) {
-			/* Read and discard input data */
-			io_delay();
-			(void)inb(0x60);
-		} else if (!(status & 2)) {
-			/* Buffers empty, finished! */
-			return 0;
-		}
-	}
-
-	return -1;
-}
-
-/* Returns nonzero if the A20 line is enabled.  The memory address
-   used as a test is the int $0x80 vector, which should be safe. */
-
-#define A20_TEST_ADDR	(4*0x80)
-#define A20_TEST_SHORT  32
-#define A20_TEST_LONG	2097152	/* 2^21 */
-
-static int a20_test(int loops)
-{
-	int ok = 0;
-	int saved, ctr;
-
-	set_fs(0x0000);
-	set_gs(0xffff);
-
-	saved = ctr = rdfs32(A20_TEST_ADDR);
-
-	while (loops--) {
-		wrfs32(++ctr, A20_TEST_ADDR);
-		io_delay();	/* Serialize and make delay constant */
-		ok = rdgs32(A20_TEST_ADDR+0x10) ^ ctr;
-		if (ok)
-			break;
-	}
-
-	wrfs32(saved, A20_TEST_ADDR);
-	return ok;
-}
-
-/* Quick test to see if A20 is already enabled */
-static int a20_test_short(void)
-{
-	return a20_test(A20_TEST_SHORT);
-}
-
-/* Longer test that actually waits for A20 to come on line; this
-   is useful when dealing with the KBC or other slow external circuitry. */
-static int a20_test_long(void)
-{
-	return a20_test(A20_TEST_LONG);
-}
-
-static void enable_a20_bios(void)
-{
-	struct biosregs ireg;
-
-	initregs(&ireg);
-	ireg.ax = 0x2401;
-	intcall(0x15, &ireg, NULL);
-}
-
-static void enable_a20_kbc(void)
-{
-	empty_8042();
-
-	outb(0xd1, 0x64);	/* Command write */
-	empty_8042();
-
-	outb(0xdf, 0x60);	/* A20 on */
-	empty_8042();
-
-	outb(0xff, 0x64);	/* Null command, but UHCI wants it */
-	empty_8042();
-}
-
-static void enable_a20_fast(void)
-{
-	u8 port_a;
-
-	port_a = inb(0x92);	/* Configuration port A */
-	port_a |=  0x02;	/* Enable A20 */
-	port_a &= ~0x01;	/* Do not reset machine */
-	outb(port_a, 0x92);
-}
-
-/*
- * Actual routine to enable A20; return 0 on ok, -1 on failure
- */
-
-#define A20_ENABLE_LOOPS 255	/* Number of times to try */
-
-int enable_a20(void)
-{
-       int loops = A20_ENABLE_LOOPS;
-       int kbc_err;
-
-       while (loops--) {
-	       /* First, check to see if A20 is already enabled
-		  (legacy free, etc.) */
-	       if (a20_test_short())
-		       return 0;
-	       
-	       /* Next, try the BIOS (INT 0x15, AX=0x2401) */
-	       enable_a20_bios();
-	       if (a20_test_short())
-		       return 0;
-	       
-	       /* Try enabling A20 through the keyboard controller */
-	       kbc_err = empty_8042();
-
-	       if (a20_test_short())
-		       return 0; /* BIOS worked, but with delayed reaction */
-	
-	       if (!kbc_err) {
-		       enable_a20_kbc();
-		       if (a20_test_long())
-			       return 0;
-	       }
-	       
-	       /* Finally, try enabling the "fast A20 gate" */
-	       enable_a20_fast();
-	       if (a20_test_long())
-		       return 0;
-       }
-       
-       return -1;
-}