init gnumach copy

1 files changed, 148 insertions, 0 deletions

diff --git a/x86_64/idt_inittab.S b/x86_64/idt_inittab.S
new file mode 100644
index 0000000..3a205ae
--- /dev/null
+++ b/x86_64/idt_inittab.S
@@ -0,0 +1,148 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+#include <mach/machine/asm.h>
+
+#include <i386/i386/seg.h>
+#include <i386/i386/i386asm.h>
+
+#include <xen/public/arch-x86/xen-x86_64.h>
+
+/* We'll be using macros to fill in a table in data hunk 2
+   while writing trap entrypoint routines at the same time.
+   Here's the header that comes before everything else.  */
+	.data	2
+ENTRY(idt_inittab)
+	.text
+
+/*
+ * Interrupt descriptor table and code vectors for it.
+ */
+#ifdef	MACH_PV_DESCRIPTORS
+#define	IDT_ENTRY(n,entry,type,ist) \
+	.data	2		;\
+	.byte	n		;\
+	.byte	(((type)&ACC_PL)>>5)|((((type)&(ACC_TYPE|ACC_A))==ACC_INTR_GATE)<<2)	;\
+	.word	FLAT_KERNEL_CS	;\
+	.word	ist		;\
+	.word	0	/*pad*/	;\
+	.quad	entry		;\
+	.text
+#else	/* MACH_PV_DESCRIPTORS */
+#define	IDT_ENTRY(n,entry,type,ist) \
+	.data	2		;\
+	.quad	entry		;\
+	.word	n		;\
+	.word	type		;\
+	.word	ist		;\
+	.word	0	/*pad*/	;\
+	.text
+#endif	/* MACH_PV_DESCRIPTORS */
+
+/*
+ * No error code.  Clear error code and push trap number.
+ */
+#define	EXCEPTION(n,name) \
+	IDT_ENTRY(n,EXT(name),ACC_PL_K|ACC_TRAP_GATE, 0);\
+ENTRY(name)				;\
+	INT_FIX				;\
+	pushq	$(0)			;\
+	pushq	$(n)			;\
+	jmp	EXT(alltraps)
+
+/*
+ * User-accessible exception.  Otherwise, same as above.
+ */
+#define	EXCEP_USR(n,name) \
+	IDT_ENTRY(n,EXT(name),ACC_PL_U|ACC_TRAP_GATE, 0);\
+ENTRY(name)				;\
+	INT_FIX				;\
+	pushq	$(0)			;\
+	pushq	$(n)			;\
+	jmp	EXT(alltraps)
+
+/*
+ * Error code has been pushed.  Just push trap number.
+ */
+#define	EXCEP_ERR(n,name) \
+	IDT_ENTRY(n,EXT(name),ACC_PL_K|ACC_INTR_GATE, 0);\
+ENTRY(name)				;\
+	INT_FIX				;\
+	pushq	$(n)			;\
+	jmp	EXT(alltraps)
+
+/*
+ * Special interrupt code: dispatches to a unique entrypoint,
+ * not defined automatically here.
+ */
+#define	EXCEP_SPC(n,name, ist)  \
+	IDT_ENTRY(n,EXT(name),ACC_PL_K|ACC_TRAP_GATE, ist)
+
+
+EXCEPTION(0x00,t_zero_div)
+EXCEP_SPC(0x01,t_debug, 0)
+/* skip NMI interrupt - let more specific code figure that out.  */
+EXCEP_USR(0x03,t_int3)
+EXCEP_USR(0x04,t_into)
+EXCEP_USR(0x05,t_bounds)
+EXCEPTION(0x06,t_invop)
+EXCEPTION(0x07,t_nofpu)
+EXCEP_SPC(0x08,t_dbl_fault, 1)
+EXCEPTION(0x09,a_fpu_over)
+EXCEPTION(0x0a,a_inv_tss)
+EXCEP_SPC(0x0b,t_segnp, 0)
+EXCEP_ERR(0x0c,t_stack_fault)
+EXCEP_SPC(0x0d,t_gen_prot, 0)
+EXCEP_SPC(0x0e,t_page_fault, 0)
+#ifdef MACH_PV_DESCRIPTORS
+EXCEP_ERR(0x0f,t_trap_0f)
+#else
+EXCEPTION(0x0f,t_trap_0f)
+#endif
+EXCEPTION(0x10,t_fpu_err)
+EXCEPTION(0x11,t_trap_11)
+EXCEPTION(0x12,t_trap_12)
+EXCEPTION(0x13,t_trap_13)
+EXCEPTION(0x14,t_trap_14)
+EXCEPTION(0x15,t_trap_15)
+EXCEPTION(0x16,t_trap_16)
+EXCEPTION(0x17,t_trap_17)
+EXCEPTION(0x18,t_trap_18)
+EXCEPTION(0x19,t_trap_19)
+EXCEPTION(0x1a,t_trap_1a)
+EXCEPTION(0x1b,t_trap_1b)
+EXCEPTION(0x1c,t_trap_1c)
+EXCEPTION(0x1d,t_trap_1d)
+EXCEPTION(0x1e,t_trap_1e)
+EXCEPTION(0x1f,t_trap_1f)
+
+/* Terminator */
+	.data	2
+	.long	0
+#ifdef	MACH_PV_DESCRIPTORS
+	.long	0
+	.quad	0
+#endif	/* MACH_PV_DESCRIPTORS */
+