1 files changed, 166 insertions, 0 deletions
diff --git a/sys/arch/i386/stand/libsa/gidt.S b/sys/arch/i386/stand/libsa/gidt.S
new file mode 100644
index 00000000000..f6fc305f224
--- /dev/null
+++ b/sys/arch/i386/stand/libsa/gidt.S
@@ -0,0 +1,166 @@
+/*	$OpenBSD: gidt.S,v 1.1 1997/04/05 18:56:27 mickey Exp $	*/
+
+/*
+ * Copyright (c) 1997 Michael Shalayeff
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Michael Shalayeff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+#include <machine/asm.h>
+#include <machine/psl.h>
+#define _LOCORE
+#include <machine/segments.h>
+#include <machine/trap.h>
+#include <debug_md.h>
+#undef _LOCORE
+
+
+	.data
+	.globl	_Gdtr
+	.globl	_codeseg
+
+	.align	3
+gdt:
+		/* 0x00 : null */
+	.space	8
+		/* 0x08 : flat code */
+	.word	0xFFFF			# lolimit
+	.word	0			# lobase
+	.byte	0			# midbase
+	.byte	SDT_MEMERA | 0 | 0x80	# RWXA, dpl = 0, present
+	.byte	0xf | 0 | 0x40 | 0x80	# hilimit, xx, 32bit, 4k granularity
+	.byte	0			# hibase
+		/* 0x10 : flat data */
+	.word	0xFFFF			# lolimit
+	.word	0			# lobase
+	.byte	0			# midbase
+	.byte	SDT_MEMRWA | 0 | 0x80	# RWA, dpl = 0, present
+	.byte	0xf | 0 | 0x40 | 0x80	# hilimit, xx, 32bit, 4k granularity
+	.byte	0			# hibase
+		/* 0x18 : 16 bit code */
+	.word	0xFFFF			# lolimit
+	.word	0			# lobase
+	.byte	0			# midbase
+	.byte	SDT_MEMERA | 0 | 0x80	# RWXA, dpl = 0, present
+	.byte	0xf | 0 | 0 | 0		# hilimit, xx, 16bit, byte granularity
+	.byte	0			# hibase
+_Gdtr:	.word	. - gdt - 1
+	.long	gdt
+	.word	0
+
+_codeseg:	.long	0
+
+	.globl	_Idtr_real
+	.align 3
+_Idtr_real:
+	.word	1023
+	.long	0
+
+	.globl	_Idtr_prot
+
+	.align 3
+idt:	/*
+	 * We beleive that all the boot code fits into
+	 * 64k, so no need for high 16 bit of procedure address (;
+	 *
+	 */
+#define IPROC(n)	X/**/n
+#define IDTENTRY(proc) \
+	.word	IPROC(proc)		/* lo offset handler */ ; \
+	.word	0x8			/* handler %cs */ ; \
+	.byte	0			/* reserved */ ; \
+	.byte	0x80 | SDT_SYS386TGT /* present, dpl=0, 32bit trap gate */ ; \
+	.word	0			/* hi offset handler */
+
+	IDTENTRY(de)	/* #DE divide by zero */
+	IDTENTRY(db)	/* #DB debug */
+	IDTENTRY(nmi)	/* NMI */
+	IDTENTRY(bp)	/* #BP breakpoint */
+	IDTENTRY(of)	/* #OF overflow */
+	IDTENTRY(br)	/* #BR BOUND range exceeded */
+	IDTENTRY(ud)	/* #UD invalid opcode */
+	IDTENTRY(nm)	/* #NM device not available */
+	IDTENTRY(df)	/* #DF double fault */
+	IDTENTRY(fo)	/* #FO coprocessor segment overrun */
+	IDTENTRY(ts)	/* #TS innvalid TSS */
+	IDTENTRY(np)	/* #NP segmant not present */
+	IDTENTRY(ss)	/* #SS stack fault */
+	IDTENTRY(gp)	/* #GP general protection */
+	IDTENTRY(pf)	/* #PF page fault */
+	IDTENTRY(xx)	/*	Intel reserved */
+	IDTENTRY(mf)	/* #MF floating point error */
+	IDTENTRY(ac)	/* #AC alignment check */
+	IDTENTRY(mc)	/* #MC machine check */
+			/*	Intel reserved (19-31) */
+	IDTENTRY(xx); IDTENTRY(xx); IDTENTRY(xx); IDTENTRY(xx)
+	IDTENTRY(xx); IDTENTRY(xx); IDTENTRY(xx); IDTENTRY(xx)
+	IDTENTRY(xx); IDTENTRY(xx); IDTENTRY(xx); IDTENTRY(xx)
+	IDTENTRY(xx)
+			/*	Maskable interrupts(32-255) */
+
+_Idtr_prot:
+	.word	. - idt
+	.long	idt
+
+	.text
+	.globl	alltraps
+
+#define IENTRY(name,type) \
+IPROC(name): \
+	pushl	$type ; \
+	jmp	alltraps
+#define IENTRY_ERR(name,err,type) \
+IPROC(name): \
+	pushl	$err ; \
+	pushl	$type ; \
+	jmp	alltraps
+
+IPROC(xx):
+	pushl	$1
+	pushl	$256
+	jmp	alltraps
+
+IENTRY_ERR(de,0,T_DIVIDE)
+IENTRY_ERR(db,0,T_TRCTRAP)
+IENTRY_ERR(nmi,0,T_NMI)
+IENTRY_ERR(bp,0,T_BPTFLT)
+IENTRY_ERR(of,0,T_OFLOW)
+IENTRY_ERR(br,0,T_BOUND)
+IENTRY_ERR(ud,0,T_PRIVINFLT)
+IENTRY_ERR(nm,0,T_DNA)
+IENTRY(df,T_DOUBLEFLT)
+IENTRY_ERR(fo,0,T_FPOPFLT)
+IENTRY(ts,T_TSSFLT)
+IENTRY(np,T_SEGNPFLT)
+IENTRY(ss,T_STKFLT)
+IENTRY(gp,T_PROTFLT)
+IENTRY(pf,T_PAGEFLT)
+IENTRY_ERR(mf,0,T_ARITHTRAP)
+IENTRY(ac,T_ALIGNFLT)
+IENTRY(mc,T_MACHK)
+