diff options
Diffstat (limited to 'include/asm-i386/segment.h')
-rw-r--r-- | include/asm-i386/segment.h | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/include/asm-i386/segment.h b/include/asm-i386/segment.h index 3c796af33776..065f10bfa487 100644 --- a/include/asm-i386/segment.h +++ b/include/asm-i386/segment.h | |||
@@ -83,14 +83,8 @@ | |||
83 | * The GDT has 32 entries | 83 | * The GDT has 32 entries |
84 | */ | 84 | */ |
85 | #define GDT_ENTRIES 32 | 85 | #define GDT_ENTRIES 32 |
86 | |||
87 | #define GDT_SIZE (GDT_ENTRIES * 8) | 86 | #define GDT_SIZE (GDT_ENTRIES * 8) |
88 | 87 | ||
89 | /* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */ | ||
90 | #define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8) | ||
91 | /* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */ | ||
92 | #define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8) | ||
93 | |||
94 | /* Simple and small GDT entries for booting only */ | 88 | /* Simple and small GDT entries for booting only */ |
95 | 89 | ||
96 | #define GDT_ENTRY_BOOT_CS 2 | 90 | #define GDT_ENTRY_BOOT_CS 2 |
@@ -134,4 +128,17 @@ | |||
134 | #ifndef CONFIG_PARAVIRT | 128 | #ifndef CONFIG_PARAVIRT |
135 | #define get_kernel_rpl() 0 | 129 | #define get_kernel_rpl() 0 |
136 | #endif | 130 | #endif |
131 | /* | ||
132 | * Matching rules for certain types of segments. | ||
133 | */ | ||
134 | |||
135 | /* Matches only __KERNEL_CS, ignoring PnP / USER / APM segments */ | ||
136 | #define SEGMENT_IS_KERNEL_CODE(x) (((x) & 0xfc) == GDT_ENTRY_KERNEL_CS * 8) | ||
137 | |||
138 | /* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */ | ||
139 | #define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8) | ||
140 | |||
141 | /* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */ | ||
142 | #define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8) | ||
143 | |||
137 | #endif | 144 | #endif |