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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 9
  40.  
  41. #define VESA_INIT_SEGMENT 0x8000
  42.  
  43. #define NULL_DES    0
  44. /* Warning: Do not reorder next items, unless you look into syscall.c!!! */
  45. #define KTEXT_DES   1
  46. #define KDATA_DES   2
  47. #define UDATA_DES   3
  48. #define UTEXT_DES   4
  49. #define KTEXT32_DES     5
  50. /* EndOfWarning */
  51. #define TSS_DES     6
  52. #define VESA_INIT_DES       8
  53.  
  54. #define gdtselector(des)    ((des)<<3)
  55. #define idtselector(des)        ((des)<<4)
  56.  
  57. #define PL_KERNEL   0
  58. #define PL_USER     3
  59.  
  60. #define AR_PRESENT  (1<<7)
  61. #define AR_DATA     (2<<3)
  62. #define AR_CODE     (3<<3)
  63. #define AR_WRITABLE (1<<1)
  64. #define AR_READABLE     (1<<1)
  65. #define AR_TSS      (0x9)
  66. #define AR_INTERRUPT    (0xe)
  67. #define AR_TRAP         (0xf)
  68.  
  69. #define DPL_KERNEL  (PL_KERNEL<<5)
  70. #define DPL_USER    (PL_USER<<5)
  71.  
  72. #define TSS_BASIC_SIZE  104
  73. #define TSS_IOMAP_SIZE  (16*1024+1) /* 16K for bitmap + 1 terminating byte for convenience */
  74.  
  75. #define IO_PORTS    (64*1024)
  76.  
  77. #ifndef __ASM__
  78.  
  79. struct descriptor {
  80.     unsigned limit_0_15: 16;
  81.     unsigned base_0_15: 16;
  82.     unsigned base_16_23: 8;
  83.     unsigned access: 8;
  84.     unsigned limit_16_19: 4;
  85.     unsigned available: 1;
  86.     unsigned longmode: 1;
  87.     unsigned special: 1;
  88.     unsigned granularity : 1;
  89.     unsigned base_24_31: 8;
  90. } __attribute__ ((packed));
  91. typedef struct descriptor descriptor_t;
  92.  
  93. struct tss_descriptor {
  94.     unsigned limit_0_15: 16;
  95.     unsigned base_0_15: 16;
  96.     unsigned base_16_23: 8;
  97.     unsigned type: 4;
  98.     unsigned : 1;
  99.     unsigned dpl : 2;
  100.     unsigned present : 1;
  101.     unsigned limit_16_19: 4;
  102.     unsigned available: 1;
  103.     unsigned : 2;
  104.     unsigned granularity : 1;
  105.     unsigned base_24_31: 8;
  106.     unsigned base_32_63 : 32;
  107.     unsigned  : 32;
  108. } __attribute__ ((packed));
  109. typedef struct tss_descriptor tss_descriptor_t;
  110.  
  111. struct idescriptor {
  112.     unsigned offset_0_15: 16;
  113.     unsigned selector: 16;
  114.     unsigned ist:3;
  115.     unsigned unused: 5;
  116.     unsigned type: 5;
  117.     unsigned dpl: 2;
  118.     unsigned present : 1;
  119.     unsigned offset_16_31: 16;
  120.     unsigned offset_32_63: 32;
  121.     unsigned  : 32;
  122. } __attribute__ ((packed));
  123. typedef struct idescriptor idescriptor_t;
  124.  
  125. struct ptr_16_64 {
  126.     __u16 limit;
  127.     __u64 base;
  128. } __attribute__ ((packed));
  129. typedef struct ptr_16_64 ptr_16_64_t;
  130.  
  131. struct ptr_16_32 {
  132.     __u16 limit;
  133.     __u32 base;
  134. } __attribute__ ((packed));
  135. typedef struct ptr_16_32 ptr_16_32_t;
  136.  
  137. struct tss {
  138.     __u32 reserve1;
  139.     __u64 rsp0;
  140.     __u64 rsp1;
  141.     __u64 rsp2;
  142.     __u64 reserve2;
  143.     __u64 ist1;
  144.     __u64 ist2;
  145.     __u64 ist3;
  146.     __u64 ist4;
  147.     __u64 ist5;
  148.     __u64 ist6;
  149.     __u64 ist7;
  150.     __u64 reserve3;
  151.     __u16 reserve4;
  152.     __u16 iomap_base;
  153.     __u8 iomap[TSS_IOMAP_SIZE];
  154. } __attribute__ ((packed));
  155. typedef struct tss tss_t;
  156.  
  157. extern tss_t *tss_p;
  158.  
  159. extern descriptor_t gdt[];
  160. extern idescriptor_t idt[];
  161.  
  162. extern ptr_16_64_t gdtr;
  163. extern ptr_16_32_t bootstrap_gdtr;
  164. extern ptr_16_32_t protected_ap_gdtr;
  165.  
  166. extern void pm_init(void);
  167.  
  168. extern void gdt_tss_setbase(descriptor_t *d, __address base);
  169. extern void gdt_tss_setlimit(descriptor_t *d, __u32 limit);
  170.  
  171. extern void idt_init(void);
  172. extern void idt_setoffset(idescriptor_t *d, __address offset);
  173.  
  174. extern void tss_initialize(tss_t *t);
  175.  
  176. #endif /* __ASM__ */
  177.  
  178. #endif
  179.