x86: Remove unused real mode code

This code is pretty old and we want to support only 32-bit systems now.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Graeme Russ <graeme.russ@gmail.com>

1 files changed, 0 insertions, 93 deletions

diff --git a/arch/x86/lib/realmode.c b/arch/x86/lib/realmode.c
deleted file mode 100644
index 75511b2bd..000000000
--- a/arch/x86/lib/realmode.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/ptrace.h>
-#include <asm/realmode.h>
-
-#define REALMODE_MAILBOX ((char *)0xe00)
-
-int realmode_setup(void)
-{
-	/* The realmode section is not relocated and still in the ROM. */
-	ulong realmode_start = (ulong)&__realmode_start;
-	ulong realmode_size = (ulong)&__realmode_size;
-
-	/* copy the realmode switch code */
-	if (realmode_size > (REALMODE_MAILBOX - (char *)REALMODE_BASE)) {
-		printf("realmode switch too large (%ld bytes, max is %d)\n",
-		       realmode_size,
-		       (int)(REALMODE_MAILBOX - (char *)REALMODE_BASE));
-		return -1;
-	}
-
-	memcpy((char *)REALMODE_BASE, (void *)realmode_start, realmode_size);
-	asm("wbinvd\n");
-
-	return 0;
-}
-
-int enter_realmode(u16 seg, u16 off, struct pt_regs *in, struct pt_regs *out)
-{
-
-	/* setup out thin bios emulation */
-	if (bios_setup())
-		return -1;
-
-	if (realmode_setup())
-		return -1;
-
-	in->eip = off;
-	in->xcs = seg;
-	if ((in->esp & 0xffff) < 4)
-		printf("Warning: entering realmode with sp < 4 will fail\n");
-
-	memcpy(REALMODE_MAILBOX, in, sizeof(struct pt_regs));
-	asm("wbinvd\n");
-
-	__asm__ volatile (
-		 "lcall $0x20,%0\n" : : "i" (&realmode_enter));
-
-	asm("wbinvd\n");
-	memcpy(out, REALMODE_MAILBOX, sizeof(struct pt_regs));
-
-	return out->eax;
-}
-
-/*
- * This code is supposed to access a realmode interrupt
- * it does currently not work for me
- */
-int enter_realmode_int(u8 lvl, struct pt_regs *in, struct pt_regs *out)
-{
-	/* place two instructions at 0x700 */
-	writeb(0xcd, 0x700);  /* int $lvl */
-	writeb(lvl, 0x701);
-	writeb(0xcb, 0x702);  /* lret */
-	asm("wbinvd\n");
-
-	enter_realmode(0x00, 0x700, in, out);
-
-	return out->eflags & 0x00000001;
-}