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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 7
  40.  
  41. #define NULL_DES    0
  42. #define KTEXT_DES   1
  43. #define KDATA_DES   2
  44. #define UTEXT_DES   3
  45. #define UDATA_DES   4
  46. #define KTEXT32_DES     5
  47. #define TSS_DES     6
  48.  
  49. #define selector(des)   ((des)<<3)
  50.  
  51. #define PL_KERNEL   0
  52. #define PL_USER     3
  53.  
  54. #define AR_PRESENT  (1<<7)
  55. #define AR_DATA     (2<<3)
  56. #define AR_CODE     (3<<3)
  57. #define AR_WRITABLE (1<<1)
  58. #define AR_READABLE     (1<<1)
  59. #define AR_INTERRUPT    (0xe)
  60. #define AR_TSS      (0x9)
  61.  
  62. #define DPL_KERNEL  (PL_KERNEL<<5)
  63. #define DPL_USER    (PL_USER<<5)
  64.  
  65. #define IO_MAP_BASE (104)
  66.  
  67. #ifndef __ASM__
  68.  
  69. struct ptr_16_32 {
  70.     __u16 limit;
  71.     __u32 base;
  72. } __attribute__ ((packed));
  73.  
  74. struct descriptor {
  75.     unsigned limit_0_15: 16;
  76.     unsigned base_0_15: 16;
  77.     unsigned base_16_23: 8;
  78.     unsigned access: 8;
  79.     unsigned limit_16_19: 4;
  80.     unsigned available: 1;
  81.     unsigned longmode: 1;
  82.     unsigned special: 1;
  83.     unsigned granularity : 1;
  84.     unsigned base_24_31: 8;
  85. } __attribute__ ((packed));
  86.  
  87. struct idescriptor {
  88.     unsigned offset_0_15: 16;
  89.     unsigned selector: 16;
  90.     unsigned unused: 8;
  91.     unsigned access: 8;
  92.     unsigned offset_16_31: 16;
  93. } __attribute__ ((packed));
  94.  
  95.  
  96. struct tss {
  97.     __u16 link;
  98.     unsigned : 16;
  99.     __u32 esp0;
  100.     __u16 ss0;
  101.     unsigned : 16;
  102.     __u32 esp1;
  103.     __u16 ss1;
  104.     unsigned : 16;
  105.     __u32 esp2;
  106.     __u16 ss2;
  107.     unsigned : 16;
  108.     __u32 cr3;
  109.     __u32 eip;
  110.     __u32 eflags;
  111.     __u32 eax;
  112.     __u32 ecx;
  113.     __u32 edx;
  114.     __u32 ebx;
  115.     __u32 esp;
  116.     __u32 ebp;
  117.     __u32 esi;
  118.     __u32 edi;
  119.     __u16 es;
  120.     unsigned : 16;
  121.     __u16 cs;
  122.     unsigned : 16;
  123.     __u16 ss;
  124.     unsigned : 16;
  125.     __u16 ds;
  126.     unsigned : 16;
  127.     __u16 fs;
  128.     unsigned : 16;
  129.     __u16 gs;
  130.     unsigned : 16;
  131.     __u16 ldtr;
  132.     unsigned : 16;
  133.     unsigned : 16;
  134.     __u16 io_map_base;
  135. } __attribute__ ((packed));
  136.  
  137. extern struct ptr_16_32 gdtr;
  138. extern struct tss *tss_p;
  139.  
  140. extern struct descriptor gdt[];
  141. extern struct idescriptor idt[];
  142.  
  143. extern void pm_init(void);
  144.  
  145. extern void gdt_setbase(struct descriptor *d, __address base);
  146. extern void gdt_setlimit(struct descriptor *d, __u32 limit);
  147.  
  148. extern void idt_init(void);
  149. extern void idt_setoffset(struct idescriptor *d, __address offset);
  150.  
  151. extern void tss_initialize(struct tss *t);
  152.  
  153. #endif /* __ASM__ */
  154.  
  155. #endif
  156.