summaryrefslogtreecommitdiffstats
path: root/lib_i386/realmode.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib_i386/realmode.c')
-rw-r--r--lib_i386/realmode.c29
1 files changed, 14 insertions, 15 deletions
diff --git a/lib_i386/realmode.c b/lib_i386/realmode.c
index d7bb81c57f..6cf273885b 100644
--- a/lib_i386/realmode.c
+++ b/lib_i386/realmode.c
@@ -1,7 +1,7 @@
/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
- *
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -37,39 +37,39 @@ int realmode_setup(void)
{
/* copy the realmode switch code */
if (i386boot_realmode_size > (REALMODE_MAILBOX-REALMODE_BASE)) {
- printf("realmode switch too large (%ld bytes, max is %d)\n",
+ 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 (
+
+ __asm__ volatile (
"lcall $0x20,%0\n" : : "i" (&realmode_enter) );
asm("wbinvd\n");
@@ -88,9 +88,8 @@ int enter_realmode_int(u8 lvl, struct pt_regs *in, struct pt_regs *out)
writeb(lvl, 0x701);
writeb(0xcb, 0x702); /* lret */
asm("wbinvd\n");
-
- enter_realmode(0x00, 0x700, in, out);
-
+
+ enter_realmode(0x00, 0x700, in, out);
+
return out->eflags&1;
}
-
OpenPOWER on IntegriCloud