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      1 /****************************************************************************
      2  ****************************************************************************
      3  ***
      4  ***   This header was automatically generated from a Linux kernel header
      5  ***   of the same name, to make information necessary for userspace to
      6  ***   call into the kernel available to libc.  It contains only constants,
      7  ***   structures, and macros generated from the original header, and thus,
      8  ***   contains no copyrightable information.
      9  ***
     10  ****************************************************************************
     11  ****************************************************************************/
     12 #ifndef _ASM_SEGMENT_H
     13 #define _ASM_SEGMENT_H
     14 
     15 #define GDT_ENTRY_TLS_ENTRIES 3
     16 #define GDT_ENTRY_TLS_MIN 6
     17 #define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
     18 
     19 #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
     20 
     21 #define GDT_ENTRY_DEFAULT_USER_CS 14
     22 #define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS * 8 + 3)
     23 
     24 #define GDT_ENTRY_DEFAULT_USER_DS 15
     25 #define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS * 8 + 3)
     26 
     27 #define GDT_ENTRY_KERNEL_BASE 12
     28 
     29 #define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
     30 #define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
     31 
     32 #define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
     33 #define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
     34 
     35 #define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
     36 #define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
     37 
     38 #define GDT_ENTRY_PNPBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 6)
     39 #define GDT_ENTRY_APMBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 11)
     40 
     41 #define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
     42 #define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
     43 
     44 #define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15)
     45 #define __KERNEL_PERCPU 0
     46 
     47 #define GDT_ENTRY_DOUBLEFAULT_TSS 31
     48 
     49 #define GDT_ENTRIES 32
     50 #define GDT_SIZE (GDT_ENTRIES * 8)
     51 
     52 #define GDT_ENTRY_BOOT_CS 2
     53 #define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
     54 
     55 #define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
     56 #define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
     57 
     58 #define GDT_ENTRY_PNPBIOS_CS32 (GDT_ENTRY_PNPBIOS_BASE + 0)
     59 #define GDT_ENTRY_PNPBIOS_CS16 (GDT_ENTRY_PNPBIOS_BASE + 1)
     60 #define GDT_ENTRY_PNPBIOS_DS (GDT_ENTRY_PNPBIOS_BASE + 2)
     61 #define GDT_ENTRY_PNPBIOS_TS1 (GDT_ENTRY_PNPBIOS_BASE + 3)
     62 #define GDT_ENTRY_PNPBIOS_TS2 (GDT_ENTRY_PNPBIOS_BASE + 4)
     63 
     64 #define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8)
     65 #define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8)
     66 #define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8)
     67 #define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8)
     68 #define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8)
     69 
     70 #define IDT_ENTRIES 256
     71 
     72 #define SEGMENT_RPL_MASK 0x3
     73 
     74 #define SEGMENT_TI_MASK 0x4
     75 
     76 #define USER_RPL 0x3
     77 
     78 #define SEGMENT_LDT 0x4
     79 #define SEGMENT_GDT 0x0
     80 
     81 #define get_kernel_rpl() 0
     82 
     83 #define SEGMENT_IS_KERNEL_CODE(x) (((x) & 0xfc) == GDT_ENTRY_KERNEL_CS * 8)
     84 
     85 #define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8)
     86 
     87 #define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
     88 
     89 #endif
     90