patch-2.4.8 linux/include/asm-ia64/ia32.h

• Lines: 195
• Date: Tue Jul 31 10:30:09 2001
• Orig file: v2.4.7/linux/include/asm-ia64/ia32.h
• Orig date: Fri Apr 13 20:26:07 2001

diff -u --recursive --new-file v2.4.7/linux/include/asm-ia64/ia32.h linux/include/asm-ia64/ia32.h
@@ -108,7 +108,7 @@
 } sigset32_t;
 
 struct sigaction32 {
-       unsigned int  sa_handler;	/* Really a pointer, but need to deal 
+       unsigned int  sa_handler;	/* Really a pointer, but need to deal
 					     with 32 bits */
        unsigned int sa_flags;
        unsigned int sa_restorer;	/* Another 32 bit pointer */
@@ -118,7 +118,7 @@
 typedef unsigned int old_sigset32_t;	/* at least 32 bits */
 
 struct old_sigaction32 {
-       unsigned int  sa_handler;	/* Really a pointer, but need to deal 
+       unsigned int  sa_handler;	/* Really a pointer, but need to deal
 					     with 32 bits */
        old_sigset32_t sa_mask;		/* A 32 bit mask */
        unsigned int sa_flags;
@@ -133,7 +133,7 @@
 
 struct ucontext_ia32 {
 	unsigned int	  uc_flags;
-	unsigned int 	  uc_link;
+	unsigned int	  uc_link;
 	stack_ia32_t	  uc_stack;
 	struct sigcontext_ia32 uc_mcontext;
 	sigset_t	  uc_sigmask;	/* mask last for extensibility */
@@ -252,6 +252,15 @@
 #define ELF_ARCH	EM_386
 
 #define IA32_PAGE_OFFSET	0xc0000000
+#define IA32_STACK_TOP		((IA32_PAGE_OFFSET/3) * 2)
+
+/*
+ * The system segments (GDT, TSS, LDT) have to be mapped below 4GB so the IA-32 engine can
+ * access them.
+ */
+#define IA32_GDT_OFFSET		(IA32_PAGE_OFFSET)
+#define IA32_TSS_OFFSET		(IA32_PAGE_OFFSET + PAGE_SIZE)
+#define IA32_LDT_OFFSET		(IA32_PAGE_OFFSET + 2*PAGE_SIZE)
 
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE	IA32_PAGE_SIZE
@@ -287,7 +296,7 @@
 
 /* This macro yields a bitmask that programs can use to figure out
    what instruction set this CPU supports.  */
-#define ELF_HWCAP 	0
+#define ELF_HWCAP	0
 
 /* This macro yields a string that ld.so will use to load
    implementation specific libraries for optimization.  Not terribly
@@ -304,61 +313,64 @@
 /*
  * IA-32 ELF specific definitions for IA-64.
  */
- 
+
 #define __USER_CS      0x23
 #define __USER_DS      0x2B
 
-#define SEG_LIM     32
-#define SEG_TYPE    52
-#define SEG_SYS     56
-#define SEG_DPL     57
-#define SEG_P       59
-#define SEG_DB      62
-#define SEG_G       63
-
 #define FIRST_TSS_ENTRY 6
 #define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1)
 #define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3))
 #define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3))
 
-#define IA64_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, segdb, granularity) \
-	       ((base)			       |       \
-		(limit << SEG_LIM)	       |       \
-		(segtype << SEG_TYPE)	       |       \
-		(nonsysseg << SEG_SYS)	       |       \
-		(dpl << SEG_DPL)	       |       \
-		(segpresent << SEG_P)	       |       \
-		(segdb << SEG_DB)	       |       \
-		(granularity << SEG_G))
-
-#define IA32_SEG_BASE 16
-#define IA32_SEG_TYPE 40
-#define IA32_SEG_SYS  44
-#define IA32_SEG_DPL  45
-#define IA32_SEG_P    47
-#define IA32_SEG_HIGH_LIMIT    48
-#define IA32_SEG_AVL   52
-#define IA32_SEG_DB    54
-#define IA32_SEG_G     55
-#define IA32_SEG_HIGH_BASE 56
-
-#define IA32_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, avl, segdb, granularity) \
-	       ((limit & 0xFFFF)			       |       \
-		 (base & 0xFFFFFF << IA32_SEG_BASE)	       |       \
-		(segtype << IA32_SEG_TYPE)		       |       \
-		(nonsysseg << IA32_SEG_SYS)		       |       \
-		(dpl << IA32_SEG_DPL)			       |       \
-		(segpresent << IA32_SEG_P)		       |       \
-		(((limit >> 16) & 0xF) << IA32_SEG_HIGH_LIMIT) |       \
-		(avl << IA32_SEG_AVL)			       |       \
-		(segdb << IA32_SEG_DB)			       |       \
-		(granularity << IA32_SEG_G)		       |       \
-		(((base >> 24) & 0xFF) << IA32_SEG_HIGH_BASE)) 
+#define IA32_SEG_BASE		16
+#define IA32_SEG_TYPE		40
+#define IA32_SEG_SYS		44
+#define IA32_SEG_DPL		45
+#define IA32_SEG_P		47
+#define IA32_SEG_HIGH_LIMIT	48
+#define IA32_SEG_AVL		52
+#define IA32_SEG_DB		54
+#define IA32_SEG_G		55
+#define IA32_SEG_HIGH_BASE	56
+
+#define IA32_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, avl, segdb, gran)	\
+	       (((limit) & 0xffff)								\
+		| (((unsigned long) (base) & 0xffffff) << IA32_SEG_BASE)			\
+		| ((unsigned long) (segtype) << IA32_SEG_TYPE)					\
+		| ((unsigned long) (nonsysseg) << IA32_SEG_SYS)					\
+		| ((unsigned long) (dpl) << IA32_SEG_DPL)					\
+		| ((unsigned long) (segpresent) << IA32_SEG_P)					\
+		| ((((unsigned long) (limit) >> 16) & 0xf) << IA32_SEG_HIGH_LIMIT)		\
+		| ((unsigned long) (avl) << IA32_SEG_AVL)					\
+		| ((unsigned long) (segdb) << IA32_SEG_DB)					\
+		| ((unsigned long) (gran) << IA32_SEG_G)					\
+		| ((((unsigned long) (base) >> 24) & 0xff) << IA32_SEG_HIGH_BASE))
+
+#define SEG_LIM		32
+#define SEG_TYPE	52
+#define SEG_SYS		56
+#define SEG_DPL		57
+#define SEG_P		59
+#define SEG_AVL		60
+#define SEG_DB		62
+#define SEG_G		63
+
+/* Unscramble an IA-32 segment descriptor into the IA-64 format.  */
+#define IA32_SEG_UNSCRAMBLE(sd)									 \
+	(   (((sd) >> IA32_SEG_BASE) & 0xffffff) | ((((sd) >> IA32_SEG_HIGH_BASE) & 0xff) << 24) \
+	 | ((((sd) & 0xffff) | ((((sd) >> IA32_SEG_HIGH_LIMIT) & 0xf) << 16)) << SEG_LIM)	 \
+	 | ((((sd) >> IA32_SEG_TYPE) & 0xf) << SEG_TYPE)					 \
+	 | ((((sd) >> IA32_SEG_SYS) & 0x1) << SEG_SYS)						 \
+	 | ((((sd) >> IA32_SEG_DPL) & 0x3) << SEG_DPL)						 \
+	 | ((((sd) >> IA32_SEG_P) & 0x1) << SEG_P)						 \
+	 | ((((sd) >> IA32_SEG_AVL) & 0x1) << SEG_AVL)						 \
+	 | ((((sd) >> IA32_SEG_DB) & 0x1) << SEG_DB)						 \
+	 | ((((sd) >> IA32_SEG_G) & 0x1) << SEG_G))
 
-#define IA32_IOBASE    0x2000000000000000 /* Virtual address for I/O space */
+#define IA32_IOBASE	0x2000000000000000 /* Virtual address for I/O space */
 
-#define IA32_CR0       0x80000001      /* Enable PG and PE bits */
-#define IA32_CR4       0	       /* No architectural extensions */
+#define IA32_CR0	0x80000001	/* Enable PG and PE bits */
+#define IA32_CR4	0x600		/* MMXEX and FXSR on */
 
 /*
  *  IA32 floating point control registers starting values
@@ -384,6 +396,25 @@
 	regs->r12 = new_sp;							\
 } while (0)
 
+/*
+ * Local Descriptor Table (LDT) related declarations.
+ */
+
+#define IA32_LDT_ENTRIES	8192		/* Maximum number of LDT entries supported. */
+#define IA32_LDT_ENTRY_SIZE	8		/* The size of each LDT entry. */
+
+struct ia32_modify_ldt_ldt_s {
+	unsigned int entry_number;
+	unsigned int base_addr;
+	unsigned int limit;
+	unsigned int seg_32bit:1;
+	unsigned int contents:2;
+	unsigned int read_exec_only:1;
+	unsigned int limit_in_pages:1;
+	unsigned int seg_not_present:1;
+	unsigned int useable:1;
+};
+
 extern void ia32_gdt_init (void);
 extern int ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
 			       sigset_t *set, struct pt_regs *regs);
@@ -392,5 +423,5 @@
 extern int ia32_exception (struct pt_regs *regs, unsigned long isr);
 
 #endif /* !CONFIG_IA32_SUPPORT */
- 
+
 #endif /* _ASM_IA64_IA32_H */