#define PG_U 0x4 /* User */
#define PG_A 0x20 /* Accessed */
#define PG_D 0x40 /* Dirty */
-/*
- * The PG_USER bits are not used by the kernel and they are
- * not interpreted by the hardware. The kernel allows
- * user processes to set them arbitrarily.
- */
/* EFLAGS Register. */
#define FLAG_MBS 0x00000002 /* Must be set. */
#define STA_W 0x2 /* Writeable (non-executable segments) */
-/* Segment selectors. */
-#define SEL_NULL 0x00 /* Null selector. */
-#define SEL_KCSEG 0x08 /* Kernel code selector. */
-#define SEL_KDSEG 0x10 /* Kernel data selector. */
-#define SEL_UCSEG 0x1B /* User code selector. */
-#define SEL_UDSEG 0x23 /* User data selector. */
-#define SEL_TSS 0x28 /* Task-state segment. */
-#define SEL_CNT 6 /* Number of segments. */
-
-#ifndef __ASSEMBLER__
-struct tss
- {
- uint16_t back_link, :16;
- uint32_t esp0;
- uint16_t ss0, :16;
- uint32_t esp1;
- uint16_t ss1, :16;
- uint32_t esp2;
- uint16_t ss2, :16;
- uint32_t cr3;
- uint32_t eip;
- uint32_t eflags;
- uint32_t eax, ecx, edx, ebx;
- uint32_t esp, ebp, esi, edi;
- uint16_t es, :16;
- uint16_t cs, :16;
- uint16_t ss, :16;
- uint16_t ds, :16;
- uint16_t fs, :16;
- uint16_t gs, :16;
- uint16_t ldt, :16;
- uint16_t trace, bitmap;
- };
-
-enum seg_system
- {
- SYS_SYSTEM = 0, /* System segment. */
- SYS_CODE_DATA = 1 /* Code or data segment. */
- };
-
-enum seg_granularity
- {
- GRAN_BYTE = 0, /* Limit has 1-byte granularity. */
- GRAN_PAGE = 1 /* Limit has 4 kB granularity. */
- };
-
-enum seg_type
- {
- /* System segment types. */
- TYPE_TSS_16_A = 1, /* 16-bit TSS (available). */
- TYPE_LDT = 2, /* LDT. */
- TYPE_TSS_16_B = 3, /* 16-bit TSS (busy). */
- TYPE_CALL_16 = 4, /* 16-bit call gate. */
- TYPE_TASK = 5, /* Task gate. */
- TYPE_INT_16 = 6, /* 16-bit interrupt gate. */
- TYPE_TRAP_16 = 7, /* 16-bit trap gate. */
- TYPE_TSS_32_A = 9, /* 32-bit TSS (available). */
- TYPE_TSS_32_B = 11, /* 32-bit TSS (busy). */
- TYPE_CALL_32 = 12, /* 32-bit call gate. */
- TYPE_INT_32 = 14, /* 32-bit interrupt gate. */
- TYPE_TRAP_32 = 15, /* 32-bit trap gate. */
-
- /* Code/data segment types. */
- TYPE_CODE = 8, /* 1=Code segment, 0=data segment. */
- TYPE_ACCESSED = 1, /* Set if accessed. */
-
- /* Data segment types. */
- TYPE_EXPAND_DOWN = 4, /* 1=Expands up, 0=expands down. */
- TYPE_WRITABLE = 2, /* 1=Read/write, 0=read-only. */
-
- /* Code segment types. */
- TYPE_CONFORMING = 4, /* 1=Conforming, 0=nonconforming. */
- TYPE_READABLE = 2 /* 1=Exec/read, 0=exec-only. */
- };
-
-static inline uint64_t
-make_dtr_operand (uint16_t limit, void *base)
-{
- return limit | ((uint64_t) (uint32_t) base << 16);
-}
-#endif
#endif /* !_MMU_H_ */