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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __amd64_PM_H__
  30. #define __amd64_PM_H__
  31.  
  32. #ifndef __ASM__
  33. # include <arch/types.h>
  34. # include <typedefs.h>
  35. # include <arch/context.h>
  36. #endif
  37.  
  38. #define IDT_ITEMS 64
  39. #define GDT_ITEMS 8
  40.  
  41. #define NULL_DES    0
  42. /* Warning: Do not reorder next items, unless you look into syscall.c!!! */
  43. #define KTEXT_DES   1
  44. #define KDATA_DES   2
  45. #define UDATA_DES   3
  46. #define UTEXT_DES   4
  47. #define KTEXT32_DES     5
  48. /* EndOfWarning */
  49. #define TSS_DES     6
  50.  
  51. #define gdtselector(des)    ((des)<<3)
  52. #define idtselector(des)        ((des)<<4)
  53.  
  54. #define PL_KERNEL   0
  55. #define PL_USER     3
  56.  
  57. #define AR_PRESENT  (1<<7)
  58. #define AR_DATA     (2<<3)
  59. #define AR_CODE     (3<<3)
  60. #define AR_WRITABLE (1<<1)
  61. #define AR_READABLE     (1<<1)
  62. #define AR_TSS      (0x9)
  63. #define AR_INTERRUPT    (0xe)
  64. #define AR_TRAP         (0xf)
  65.  
  66. #define DPL_KERNEL  (PL_KERNEL<<5)
  67. #define DPL_USER    (PL_USER<<5)
  68.  
  69. #define TSS_BASIC_SIZE  104
  70.  
  71. #ifndef __ASM__
  72.  
  73. struct descriptor {
  74.     unsigned limit_0_15: 16;
  75.     unsigned base_0_15: 16;
  76.     unsigned base_16_23: 8;
  77.     unsigned access: 8;
  78.     unsigned limit_16_19: 4;
  79.     unsigned available: 1;
  80.     unsigned longmode: 1;
  81.     unsigned special: 1;
  82.     unsigned granularity : 1;
  83.     unsigned base_24_31: 8;
  84. } __attribute__ ((packed));
  85. typedef struct descriptor descriptor_t;
  86.  
  87. struct tss_descriptor {
  88.     unsigned limit_0_15: 16;
  89.     unsigned base_0_15: 16;
  90.     unsigned base_16_23: 8;
  91.     unsigned type: 4;
  92.     unsigned : 1;
  93.     unsigned dpl : 2;
  94.     unsigned present : 1;
  95.     unsigned limit_16_19: 4;
  96.     unsigned available: 1;
  97.     unsigned : 2;
  98.     unsigned granularity : 1;
  99.     unsigned base_24_31: 8;
  100.     unsigned base_32_63 : 32;
  101.     unsigned  : 32;
  102. } __attribute__ ((packed));
  103. typedef struct tss_descriptor tss_descriptor_t;
  104.  
  105. struct idescriptor {
  106.     unsigned offset_0_15: 16;
  107.     unsigned selector: 16;
  108.     unsigned ist:3;
  109.     unsigned unused: 5;
  110.     unsigned type: 5;
  111.     unsigned dpl: 2;
  112.     unsigned present : 1;
  113.     unsigned offset_16_31: 16;
  114.     unsigned offset_32_63: 32;
  115.     unsigned  : 32;
  116. } __attribute__ ((packed));
  117. typedef struct idescriptor idescriptor_t;
  118.  
  119. struct ptr_16_64 {
  120.     __u16 limit;
  121.     __u64 base;
  122. } __attribute__ ((packed));
  123. typedef struct ptr_16_64 ptr_16_64_t;
  124.  
  125. struct ptr_16_32 {
  126.     __u16 limit;
  127.     __u32 base;
  128. } __attribute__ ((packed));
  129. typedef struct ptr_16_32 ptr_16_32_t;
  130.  
  131. struct tss {
  132.     __u32 reserve1;
  133.     __u64 rsp0;
  134.     __u64 rsp1;
  135.     __u64 rsp2;
  136.     __u64 reserve2;
  137.     __u64 ist1;
  138.     __u64 ist2;
  139.     __u64 ist3;
  140.     __u64 ist4;
  141.     __u64 ist5;
  142.     __u64 ist6;
  143.     __u64 ist7;
  144.     __u64 reserve3;
  145.     __u16 reserve4;
  146.     __u16 iomap_base;
  147.     __u8 iomap[0x10000 + 1];    /* 64K + 1 terminating byte */
  148. } __attribute__ ((packed));
  149. typedef struct tss tss_t;
  150.  
  151. extern tss_t *tss_p;
  152.  
  153. extern descriptor_t gdt[];
  154. extern idescriptor_t idt[];
  155.  
  156. extern ptr_16_64_t gdtr;
  157. extern ptr_16_32_t bootstrap_gdtr;
  158. extern ptr_16_32_t protected_ap_gdtr;
  159.  
  160. extern void pm_init(void);
  161.  
  162. extern void gdt_tss_setbase(descriptor_t *d, __address base);
  163. extern void gdt_tss_setlimit(descriptor_t *d, __u32 limit);
  164.  
  165. extern void idt_init(void);
  166. extern void idt_setoffset(idescriptor_t *d, __address offset);
  167.  
  168. extern void tss_initialize(tss_t *t);
  169.  
  170. #endif /* __ASM__ */
  171.  
  172. #endif
  173.