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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.  
  42. #define NULL_DES    0
  43. /* Warning: Do not reorder next items, unless you look into syscall.c!!! */
  44. #define KTEXT_DES   1
  45. #define KDATA_DES   2
  46. #define UDATA_DES   3
  47. #define UTEXT_DES   4
  48. #define KTEXT32_DES     5
  49. /* EndOfWarning */
  50. #define TSS_DES     6
  51.  
  52.  
  53.  
  54. #ifdef CONFIG_FB
  55.  
  56. #define VESA_INIT_DES       8
  57. #define VESA_INIT_SEGMENT 0x8000
  58. #undef GDT_ITEMS
  59. #define GDT_ITEMS 9
  60.  
  61. #endif /*CONFIG_FB*/
  62.  
  63.  
  64.  
  65. #define gdtselector(des)    ((des)<<3)
  66. #define idtselector(des)        ((des)<<4)
  67.  
  68. #define PL_KERNEL   0
  69. #define PL_USER     3
  70.  
  71. #define AR_PRESENT  (1<<7)
  72. #define AR_DATA     (2<<3)
  73. #define AR_CODE     (3<<3)
  74. #define AR_WRITABLE (1<<1)
  75. #define AR_READABLE     (1<<1)
  76. #define AR_TSS      (0x9)
  77. #define AR_INTERRUPT    (0xe)
  78. #define AR_TRAP         (0xf)
  79.  
  80. #define DPL_KERNEL  (PL_KERNEL<<5)
  81. #define DPL_USER    (PL_USER<<5)
  82.  
  83. #define TSS_BASIC_SIZE  104
  84. #define TSS_IOMAP_SIZE  (16*1024+1) /* 16K for bitmap + 1 terminating byte for convenience */
  85.  
  86. #define IO_PORTS    (64*1024)
  87.  
  88. #ifndef __ASM__
  89.  
  90. struct descriptor {
  91.     unsigned limit_0_15: 16;
  92.     unsigned base_0_15: 16;
  93.     unsigned base_16_23: 8;
  94.     unsigned access: 8;
  95.     unsigned limit_16_19: 4;
  96.     unsigned available: 1;
  97.     unsigned longmode: 1;
  98.     unsigned special: 1;
  99.     unsigned granularity : 1;
  100.     unsigned base_24_31: 8;
  101. } __attribute__ ((packed));
  102. typedef struct descriptor descriptor_t;
  103.  
  104. struct tss_descriptor {
  105.     unsigned limit_0_15: 16;
  106.     unsigned base_0_15: 16;
  107.     unsigned base_16_23: 8;
  108.     unsigned type: 4;
  109.     unsigned : 1;
  110.     unsigned dpl : 2;
  111.     unsigned present : 1;
  112.     unsigned limit_16_19: 4;
  113.     unsigned available: 1;
  114.     unsigned : 2;
  115.     unsigned granularity : 1;
  116.     unsigned base_24_31: 8;
  117.     unsigned base_32_63 : 32;
  118.     unsigned  : 32;
  119. } __attribute__ ((packed));
  120. typedef struct tss_descriptor tss_descriptor_t;
  121.  
  122. struct idescriptor {
  123.     unsigned offset_0_15: 16;
  124.     unsigned selector: 16;
  125.     unsigned ist:3;
  126.     unsigned unused: 5;
  127.     unsigned type: 5;
  128.     unsigned dpl: 2;
  129.     unsigned present : 1;
  130.     unsigned offset_16_31: 16;
  131.     unsigned offset_32_63: 32;
  132.     unsigned  : 32;
  133. } __attribute__ ((packed));
  134. typedef struct idescriptor idescriptor_t;
  135.  
  136. struct ptr_16_64 {
  137.     __u16 limit;
  138.     __u64 base;
  139. } __attribute__ ((packed));
  140. typedef struct ptr_16_64 ptr_16_64_t;
  141.  
  142. struct ptr_16_32 {
  143.     __u16 limit;
  144.     __u32 base;
  145. } __attribute__ ((packed));
  146. typedef struct ptr_16_32 ptr_16_32_t;
  147.  
  148. struct tss {
  149.     __u32 reserve1;
  150.     __u64 rsp0;
  151.     __u64 rsp1;
  152.     __u64 rsp2;
  153.     __u64 reserve2;
  154.     __u64 ist1;
  155.     __u64 ist2;
  156.     __u64 ist3;
  157.     __u64 ist4;
  158.     __u64 ist5;
  159.     __u64 ist6;
  160.     __u64 ist7;
  161.     __u64 reserve3;
  162.     __u16 reserve4;
  163.     __u16 iomap_base;
  164.     __u8 iomap[TSS_IOMAP_SIZE];
  165. } __attribute__ ((packed));
  166. typedef struct tss tss_t;
  167.  
  168. extern tss_t *tss_p;
  169.  
  170. extern descriptor_t gdt[];
  171. extern idescriptor_t idt[];
  172.  
  173. extern ptr_16_64_t gdtr;
  174. extern ptr_16_32_t bootstrap_gdtr;
  175. extern ptr_16_32_t protected_ap_gdtr;
  176.  
  177. extern void pm_init(void);
  178.  
  179. extern void gdt_tss_setbase(descriptor_t *d, __address base);
  180. extern void gdt_tss_setlimit(descriptor_t *d, __u32 limit);
  181.  
  182. extern void idt_init(void);
  183. extern void idt_setoffset(idescriptor_t *d, __address offset);
  184.  
  185. extern void tss_initialize(tss_t *t);
  186.  
  187. #endif /* __ASM__ */
  188.  
  189. #endif
  190.