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 __ARCH_DESC_H 13 #define __ARCH_DESC_H 14 15 #include <asm/ldt.h> 16 #include <asm/segment.h> 17 18 #ifndef __ASSEMBLY__ 19 20 #include <linux/preempt.h> 21 #include <linux/smp.h> 22 #include <linux/percpu.h> 23 24 #include <asm/mmu.h> 25 26 struct Xgt_desc_struct { 27 unsigned short size; 28 unsigned long address __attribute__((packed)); 29 unsigned short pad; 30 } __attribute__ ((packed)); 31 32 struct gdt_page 33 { 34 struct desc_struct gdt[GDT_ENTRIES]; 35 } __attribute__((aligned(PAGE_SIZE))); 36 37 #define DESCTYPE_LDT 0x82 38 #define DESCTYPE_TSS 0x89 39 #define DESCTYPE_TASK 0x85 40 #define DESCTYPE_INT 0x8e 41 #define DESCTYPE_TRAP 0x8f 42 #define DESCTYPE_DPL3 0x60 43 #define DESCTYPE_S 0x10 44 #define load_TR_desc() native_load_tr_desc() 45 #define load_gdt(dtr) native_load_gdt(dtr) 46 #define load_idt(dtr) native_load_idt(dtr) 47 #define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr)) 48 #define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt)) 49 #define store_gdt(dtr) native_store_gdt(dtr) 50 #define store_idt(dtr) native_store_idt(dtr) 51 #define store_tr(tr) (tr = native_store_tr()) 52 #define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt)) 53 #define load_TLS(t, cpu) native_load_tls(t, cpu) 54 #define set_ldt native_set_ldt 55 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) 56 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) 57 #define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) 58 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr) 59 #define LDT_entry_a(info) ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) 60 #define LDT_entry_b(info) (((info)->base_addr & 0xff000000) | (((info)->base_addr & 0x00ff0000) >> 16) | ((info)->limit & 0xf0000) | (((info)->read_exec_only ^ 1) << 9) | ((info)->contents << 10) | (((info)->seg_not_present ^ 1) << 15) | ((info)->seg_32bit << 22) | ((info)->limit_in_pages << 23) | ((info)->useable << 20) | 0x7000) 61 #define LDT_empty(info) ( (info)->base_addr == 0 && (info)->limit == 0 && (info)->contents == 0 && (info)->read_exec_only == 1 && (info)->seg_32bit == 0 && (info)->limit_in_pages == 0 && (info)->seg_not_present == 1 && (info)->useable == 0 ) 62 #else 63 #define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) movb idx*8+4(gdt), lo_b; movb idx*8+7(gdt), hi_b; shll $16, base; movw idx*8+2(gdt), lo_w; 64 #endif 65 #endif 66