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-rw-r--r--include/asm-x86/segment.h209
1 files changed, 0 insertions, 209 deletions
diff --git a/include/asm-x86/segment.h b/include/asm-x86/segment.h
deleted file mode 100644
index 5d6e69454891..000000000000
--- a/include/asm-x86/segment.h
+++ /dev/null
@@ -1,209 +0,0 @@
1#ifndef ASM_X86__SEGMENT_H
2#define ASM_X86__SEGMENT_H
3
4/* Constructor for a conventional segment GDT (or LDT) entry */
5/* This is a macro so it can be used in initializers */
6#define GDT_ENTRY(flags, base, limit) \
7 ((((base) & 0xff000000ULL) << (56-24)) | \
8 (((flags) & 0x0000f0ffULL) << 40) | \
9 (((limit) & 0x000f0000ULL) << (48-16)) | \
10 (((base) & 0x00ffffffULL) << 16) | \
11 (((limit) & 0x0000ffffULL)))
12
13/* Simple and small GDT entries for booting only */
14
15#define GDT_ENTRY_BOOT_CS 2
16#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
17
18#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
19#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
20
21#define GDT_ENTRY_BOOT_TSS (GDT_ENTRY_BOOT_CS + 2)
22#define __BOOT_TSS (GDT_ENTRY_BOOT_TSS * 8)
23
24#ifdef CONFIG_X86_32
25/*
26 * The layout of the per-CPU GDT under Linux:
27 *
28 * 0 - null
29 * 1 - reserved
30 * 2 - reserved
31 * 3 - reserved
32 *
33 * 4 - unused <==== new cacheline
34 * 5 - unused
35 *
36 * ------- start of TLS (Thread-Local Storage) segments:
37 *
38 * 6 - TLS segment #1 [ glibc's TLS segment ]
39 * 7 - TLS segment #2 [ Wine's %fs Win32 segment ]
40 * 8 - TLS segment #3
41 * 9 - reserved
42 * 10 - reserved
43 * 11 - reserved
44 *
45 * ------- start of kernel segments:
46 *
47 * 12 - kernel code segment <==== new cacheline
48 * 13 - kernel data segment
49 * 14 - default user CS
50 * 15 - default user DS
51 * 16 - TSS
52 * 17 - LDT
53 * 18 - PNPBIOS support (16->32 gate)
54 * 19 - PNPBIOS support
55 * 20 - PNPBIOS support
56 * 21 - PNPBIOS support
57 * 22 - PNPBIOS support
58 * 23 - APM BIOS support
59 * 24 - APM BIOS support
60 * 25 - APM BIOS support
61 *
62 * 26 - ESPFIX small SS
63 * 27 - per-cpu [ offset to per-cpu data area ]
64 * 28 - unused
65 * 29 - unused
66 * 30 - unused
67 * 31 - TSS for double fault handler
68 */
69#define GDT_ENTRY_TLS_MIN 6
70#define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
71
72#define GDT_ENTRY_DEFAULT_USER_CS 14
73
74#define GDT_ENTRY_DEFAULT_USER_DS 15
75
76#define GDT_ENTRY_KERNEL_BASE 12
77
78#define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
79
80#define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
81
82#define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
83#define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
84
85#define GDT_ENTRY_PNPBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 6)
86#define GDT_ENTRY_APMBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 11)
87
88#define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
89#define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
90
91#define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15)
92#ifdef CONFIG_SMP
93#define __KERNEL_PERCPU (GDT_ENTRY_PERCPU * 8)
94#else
95#define __KERNEL_PERCPU 0
96#endif
97
98#define GDT_ENTRY_DOUBLEFAULT_TSS 31
99
100/*
101 * The GDT has 32 entries
102 */
103#define GDT_ENTRIES 32
104
105/* The PnP BIOS entries in the GDT */
106#define GDT_ENTRY_PNPBIOS_CS32 (GDT_ENTRY_PNPBIOS_BASE + 0)
107#define GDT_ENTRY_PNPBIOS_CS16 (GDT_ENTRY_PNPBIOS_BASE + 1)
108#define GDT_ENTRY_PNPBIOS_DS (GDT_ENTRY_PNPBIOS_BASE + 2)
109#define GDT_ENTRY_PNPBIOS_TS1 (GDT_ENTRY_PNPBIOS_BASE + 3)
110#define GDT_ENTRY_PNPBIOS_TS2 (GDT_ENTRY_PNPBIOS_BASE + 4)
111
112/* The PnP BIOS selectors */
113#define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8) /* segment for calling fn */
114#define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8) /* code segment for BIOS */
115#define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8) /* data segment for BIOS */
116#define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8) /* transfer data segment */
117#define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8) /* another data segment */
118
119/* Bottom two bits of selector give the ring privilege level */
120#define SEGMENT_RPL_MASK 0x3
121/* Bit 2 is table indicator (LDT/GDT) */
122#define SEGMENT_TI_MASK 0x4
123
124/* User mode is privilege level 3 */
125#define USER_RPL 0x3
126/* LDT segment has TI set, GDT has it cleared */
127#define SEGMENT_LDT 0x4
128#define SEGMENT_GDT 0x0
129
130/*
131 * Matching rules for certain types of segments.
132 */
133
134/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
135#define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
136
137
138#else
139#include <asm/cache.h>
140
141#define GDT_ENTRY_KERNEL32_CS 1
142#define GDT_ENTRY_KERNEL_CS 2
143#define GDT_ENTRY_KERNEL_DS 3
144
145#define __KERNEL32_CS (GDT_ENTRY_KERNEL32_CS * 8)
146
147/*
148 * we cannot use the same code segment descriptor for user and kernel
149 * -- not even in the long flat mode, because of different DPL /kkeil
150 * The segment offset needs to contain a RPL. Grr. -AK
151 * GDT layout to get 64bit syscall right (sysret hardcodes gdt offsets)
152 */
153#define GDT_ENTRY_DEFAULT_USER32_CS 4
154#define GDT_ENTRY_DEFAULT_USER_DS 5
155#define GDT_ENTRY_DEFAULT_USER_CS 6
156#define __USER32_CS (GDT_ENTRY_DEFAULT_USER32_CS * 8 + 3)
157#define __USER32_DS __USER_DS
158
159#define GDT_ENTRY_TSS 8 /* needs two entries */
160#define GDT_ENTRY_LDT 10 /* needs two entries */
161#define GDT_ENTRY_TLS_MIN 12
162#define GDT_ENTRY_TLS_MAX 14
163
164#define GDT_ENTRY_PER_CPU 15 /* Abused to load per CPU data from limit */
165#define __PER_CPU_SEG (GDT_ENTRY_PER_CPU * 8 + 3)
166
167/* TLS indexes for 64bit - hardcoded in arch_prctl */
168#define FS_TLS 0
169#define GS_TLS 1
170
171#define GS_TLS_SEL ((GDT_ENTRY_TLS_MIN+GS_TLS)*8 + 3)
172#define FS_TLS_SEL ((GDT_ENTRY_TLS_MIN+FS_TLS)*8 + 3)
173
174#define GDT_ENTRIES 16
175
176#endif
177
178#define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
179#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
180#define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS* 8 + 3)
181#define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS* 8 + 3)
182#ifndef CONFIG_PARAVIRT
183#define get_kernel_rpl() 0
184#endif
185
186/* User mode is privilege level 3 */
187#define USER_RPL 0x3
188/* LDT segment has TI set, GDT has it cleared */
189#define SEGMENT_LDT 0x4
190#define SEGMENT_GDT 0x0
191
192/* Bottom two bits of selector give the ring privilege level */
193#define SEGMENT_RPL_MASK 0x3
194/* Bit 2 is table indicator (LDT/GDT) */
195#define SEGMENT_TI_MASK 0x4
196
197#define IDT_ENTRIES 256
198#define NUM_EXCEPTION_VECTORS 32
199#define GDT_SIZE (GDT_ENTRIES * 8)
200#define GDT_ENTRY_TLS_ENTRIES 3
201#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
202
203#ifdef __KERNEL__
204#ifndef __ASSEMBLY__
205extern const char early_idt_handlers[NUM_EXCEPTION_VECTORS][10];
206#endif
207#endif
208
209#endif /* ASM_X86__SEGMENT_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-20 10:42:46 -0500