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author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-12 22:28:04 -0500 |
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committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 09:13:03 +0200 |
commit | ea0364f1bbfed1e3ea711147420875cf338fe77a (patch) | |
tree | 15c051bc4d2e94c1661c73e1b87c22c7beda7c24 /lib_i386/realmode.c | |
parent | 89f39e177e7b0152aa1d3152baa25d986e36cdcf (diff) | |
download | u-boot-imx-ea0364f1bbfed1e3ea711147420875cf338fe77a.zip u-boot-imx-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.gz u-boot-imx-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.bz2 |
Move lib_$ARCH directories to arch/$ARCH/lib
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk
This change is intended to clean up the top-level directory structure
and more closely mimic Linux's directory organization.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'lib_i386/realmode.c')
-rw-r--r-- | lib_i386/realmode.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/lib_i386/realmode.c b/lib_i386/realmode.c deleted file mode 100644 index 3c3c1fc..0000000 --- a/lib_i386/realmode.c +++ /dev/null @@ -1,100 +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_BASE ((char*)0x7c0) -#define REALMODE_MAILBOX ((char*)0xe00) - - -extern ulong _i386boot_realmode; -extern ulong _i386boot_realmode_size; -extern char realmode_enter; - -int realmode_setup(void) -{ - ulong i386boot_realmode = (ulong)&_i386boot_realmode; - ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; - - /* copy the realmode switch code */ - if (i386boot_realmode_size > (REALMODE_MAILBOX-REALMODE_BASE)) { - printf("realmode switch too large (%ld bytes, max is %d)\n", - i386boot_realmode_size, (REALMODE_MAILBOX-REALMODE_BASE)); - return -1; - } - - memcpy(REALMODE_BASE, (void*)i386boot_realmode, i386boot_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 (3>(in->esp & 0xffff)) { - 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&1; -} |