/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
#ifndef _I386_SEG_H_
#define _I386_SEG_H_
+
#include <mach_kdb.h>
+#include <stdint.h>
+#include <mach/vm_types.h>
+#include <architecture/i386/sel.h>
/*
* i386 segmentation.
*/
+static inline uint16_t
+sel_to_selector(sel_t sel)
+{
+ union {
+ sel_t sel;
+ uint16_t selector;
+ } tconv;
+
+ tconv.sel = sel;
+
+ return (tconv.selector);
+}
+
+static inline sel_t
+selector_to_sel(uint16_t selector)
+{
+ union {
+ uint16_t selector;
+ sel_t sel;
+ } tconv;
+
+ tconv.selector = selector;
+
+ return (tconv.sel);
+}
+
+#define LDTSZ 8192 /* size of the kernel ldt in entries */
+#define LDTSZ_MIN 17 /* kernel ldt entries used by the system */
+
+#if MACH_KDB
+#define GDTSZ 19
+#else
+#define GDTSZ 18
+#endif
+
+/*
+ * Interrupt table is always 256 entries long.
+ */
+#define IDTSZ 256
+
#ifndef __ASSEMBLER__
+
+#include <sys/cdefs.h>
+
/*
* Real segment descriptor.
*/
struct real_descriptor {
- unsigned int limit_low:16, /* limit 0..15 */
+ uint32_t limit_low:16, /* limit 0..15 */
base_low:16, /* base 0..15 */
base_med:8, /* base 16..23 */
access:8, /* access byte */
granularity:4, /* granularity */
base_high:8; /* base 24..31 */
};
-
+struct real_descriptor64 {
+ uint32_t limit_low16:16, /* limit 0..15 */
+ base_low16:16, /* base 0..15 */
+ base_med8:8, /* base 16..23 */
+ access8:8, /* access byte */
+ limit_high4:4, /* limit 16..19 */
+ granularity4:4, /* granularity */
+ base_high8:8, /* base 24..31 */
+ base_top32:32, /* base 32..63 */
+ reserved32:32; /* reserved/zero */
+};
struct real_gate {
- unsigned int offset_low:16, /* offset 0..15 */
+ uint32_t offset_low:16, /* offset 0..15 */
selector:16,
word_count:8,
access:8,
offset_high:16; /* offset 16..31 */
};
+struct real_gate64 {
+ uint32_t offset_low16:16, /* offset 0..15 */
+ selector16:16,
+ IST:3,
+ zeroes5:5,
+ access8:8,
+ offset_high16:16, /* offset 16..31 */
+ offset_top32:32, /* offset 32..63 */
+ reserved32:32; /* reserved/zero */
+};
/*
* We build descriptors and gates in a 'fake' format to let the
* at runtime.
*/
struct fake_descriptor {
- unsigned int offset:32; /* offset */
- unsigned int lim_or_seg:20; /* limit */
+ uint32_t offset:32; /* offset */
+ uint32_t lim_or_seg:20; /* limit */
/* or segment, for gate */
- unsigned int size_or_wdct:4; /* size/granularity */
+ uint32_t size_or_wdct:4; /* size/granularity */
/* word count, for gate */
- unsigned int access:8; /* access */
+ uint32_t access:8; /* access */
+};
+struct fake_descriptor64 {
+ uint32_t offset[2]; /* offset [0..31,32..63] */
+ uint32_t lim_or_seg:20; /* limit */
+ /* or segment, for gate */
+ uint32_t size_or_IST:4; /* size/granularity */
+ /* IST for gates */
+ uint32_t access:8; /* access */
+ uint32_t reserved:32; /* reserved/zero */
};
+#define FAKE_UBER64(addr32) { (uint32_t) (addr32), KERNEL_UBER_BASE_HI32 }
+#define FAKE_COMPAT(addr32) { (uint32_t) (addr32), 0x0 }
+#define UBER64(addr32) ((addr64_t) addr32 + KERNEL_UBER_BASE)
+
+/*
+ * Boot-time data for master (or only) CPU
+ */
+extern struct fake_descriptor master_idt[IDTSZ];
+extern struct fake_descriptor master_gdt[GDTSZ];
+extern struct fake_descriptor master_ldt[LDTSZ];
+extern struct i386_tss master_ktss;
+extern struct sysenter_stack master_sstk;
+
+extern struct fake_descriptor64 master_idt64[IDTSZ];
+extern struct fake_descriptor64 kernel_ldt_desc64;
+extern struct fake_descriptor64 kernel_tss_desc64;
+extern struct x86_64_tss master_ktss64;
+
+__BEGIN_DECLS
+
+extern char df_task_stack[];
+extern char df_task_stack_end[];
+extern struct i386_tss master_dftss;
+extern void df_task_start(void);
+
+extern char mc_task_stack[];
+extern char mc_task_stack_end[];
+extern struct i386_tss master_mctss;
+extern void mc_task_start(void);
+
+#if MACH_KDB
+extern char db_stack_store[];
+extern char db_task_stack_store[];
+extern struct i386_tss master_dbtss;
+extern void db_task_start(void);
+#endif /* MACH_KDB */
+
+__END_DECLS
+
#endif /*__ASSEMBLER__*/
+#define SZ_64 0x2 /* 64-bit segment */
#define SZ_32 0x4 /* 32-bit segment */
#define SZ_G 0x8 /* 4K limit field */
/*
* Convert selector to descriptor table index.
*/
-#define sel_idx(sel) ((sel)>>3)
+#define sel_idx(sel) (selector_to_sel(sel).index)
+#define SEL_TO_INDEX(s) ((s)>>3)
+
+#define NULL_SEG 0
/*
* User descriptors for MACH - 32-bit flat address space
*/
-#define USER_SCALL 0x07 /* system call gate */
-#define USER_RPC 0x0f /* mach rpc call gate */
-#define USER_CS 0x17 /* user code segment */
-#define USER_DS 0x1f /* user data segment */
-
-#define LDTSZ 4
+#define SYSENTER_CS 0x07 /* sysenter kernel code segment */
+#define SYSENTER_DS 0x0f /* sysenter kernel data segment */
+#define USER_CS 0x17 /* user code segment
+ Must be SYSENTER_CS+16 for sysexit */
+/* Special case: sysenter with EFL_TF (trace bit) set - use iret not sysexit */
+#define SYSENTER_TF_CS (USER_CS|0x10000)
+#define USER_DS 0x1f /* user data segment
+ Must be SYSENTER_CS+24 for sysexit */
+#define USER64_CS 0x27 /* 64-bit user code segment
+ Must be USER_CS+16 for sysret */
+#define USER64_DS USER_DS /* 64-bit user data segment == 32-bit */
+#define SYSCALL_CS 0x2f /* 64-bit syscall pseudo-segment */
+#define USER_CTHREAD 0x37 /* user cthread area */
+#define USER_SETTABLE 0x3f /* start of user settable ldt entries */
+#define USLDTSZ 10 /* number of user settable entries */
/*
* Kernel descriptors for MACH - 32-bit flat address space.
#define KERNEL_CS 0x08 /* kernel code */
#define KERNEL_DS 0x10 /* kernel data */
#define KERNEL_LDT 0x18 /* master LDT */
-#define KERNEL_TSS 0x20 /* master TSS (uniprocessor) */
-#ifdef MACH_BSD
-#define BSD_SCALL_SEL 0x28 /* BSD System calls */
-#define MK25_SCALL_SEL 0x30 /* MK25 System Calls */
-#define MACHDEP_SCALL_SEL 0x38 /* Machdep SYstem calls */
-#else
-#define USER_LDT 0x28 /* place for per-thread LDT */
-#define USER_TSS 0x30 /* place for per-thread TSS
- that holds IO bitmap */
-#define FPE_CS 0x38 /* floating-point emulator code */
-#endif
-#define USER_FPREGS 0x40 /* user-mode access to saved
- floating-point registers */
-#define CPU_DATA 0x48 /* per-cpu data */
+#define KERNEL_LDT_2 0x20 /* master LDT expanded for 64-bit */
+#define KERNEL_TSS 0x28 /* master TSS */
+#define KERNEL_TSS_2 0x30 /* master TSS expanded for 64-bit */
+
+#define MC_TSS 0x38 /* machine-check handler TSS */
+
+#define CPU_DATA_GS 0x48 /* per-cpu data */
+
+#define DF_TSS 0x50 /* double-fault handler TSS */
-#ifdef MACH_BSD
#define USER_LDT 0x58
#define USER_TSS 0x60
#define FPE_CS 0x68
-#endif
-#if MACH_KDB
-#define DEBUG_TSS 0x50 /* debug TSS (uniprocessor) */
+#define USER_WINDOW_SEL 0x70 /* window for copyin/copyout */
+#define PHYS_WINDOW_SEL 0x78 /* window for copyin/copyout */
-#ifdef MACH_BSD
-#define GDTSZ 14
-#else
-#define GDTSZ 11
-#endif
-#else
+#define KERNEL64_CS 0x80 /* kernel 64-bit code */
+#define KERNEL64_SS 0x88 /* kernel 64-bit (syscall) stack */
-#ifdef MACH_BSD
-#define GDTSZ 13
-#else
-#define GDTSZ 10
-#endif
+#if MACH_KDB
+#define DEBUG_TSS 0x90 /* debug TSS (uniprocessor) */
#endif
-/*
- * Interrupt table is always 256 entries long.
- */
-#define IDTSZ 256
+struct __gdt_desc_struct {
+ unsigned short size;
+ unsigned long address __attribute__((packed));
+ unsigned short pad;
+} __attribute__ ((packed));
+
+struct __idt_desc_struct {
+ unsigned short size;
+ unsigned long address __attribute__((packed));
+ unsigned short pad;
+} __attribute__ ((packed));
+
#endif /* _I386_SEG_H_ */
projects / apple / xnu.git / blobdiff