include/arch/i386/archtypes.h

   1
   2 #ifndef _I386_TYPES_H
   3 #define _I386_TYPES_H
   4
   5 #include <minix/sys_config.h>
   6 #include <machine/stackframe.h>
   7 #include <machine/fpu.h>
   8
   9 struct segdesc_s {              /* segment descriptor for protected mode */
  10   u16_t limit_low;
  11   u16_t base_low;
  12   u8_t base_middle;
  13   u8_t access;          /* |P|DL|1|X|E|R|A| */
  14   u8_t granularity;     /* |G|X|0|A|LIMT| */
  15   u8_t base_high;
  16 };
  17
  18 #define LDT_SIZE (2 + NR_REMOTE_SEGS)   /* CS, DS and remote segments */
  19
  20 /* Fixed local descriptors. */
  21 #define CS_LDT_INDEX         0  /* process CS */
  22 #define DS_LDT_INDEX         1  /* process DS=ES=FS=GS=SS */
  23 #define EXTRA_LDT_INDEX      2  /* first of the extra LDT entries */
  24
  25 typedef struct segframe {
  26         reg_t p_ldt_sel;    /* selector in gdt with ldt base and limit */
  27         reg_t   p_cr3;          /* page table root */
  28         struct segdesc_s p_ldt[LDT_SIZE]; /* CS, DS and remote */
  29 } segframe_t;
  30
  31 /* fpu_state_s is used in kernel proc table.
  32  * Any changes in this structure requires changes in sconst.h,
  33  * since this structure is used in proc structure. */
  34 struct fpu_state_s {
  35         union fpu_state_u *fpu_save_area_p; /* 16-aligned fpu_save_area */
  36         /* fpu_image includes 512 bytes of image itself and
  37          * additional 15 bytes required for manual 16-byte alignment. */
  38         char fpu_image[527];
  39 };
  40
  41 #define INMEMORY(p) (!p->p_seg.p_cr3 || ptproc == p)
  42
  43 #endif /* #ifndef _I386_TYPES_H */
  44