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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. /** @addtogroup ia32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_ia32_PM_H_
  36. #define KERN_ia32_PM_H_
  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 TSS_DES    5
  47. #define TLS_DES    6  /* Pointer to Thread-Local-Storage data */
  48.  
  49. #ifdef CONFIG_FB
  50.  
  51. #define VESA_INIT_SEGMENT  0x8000
  52. #define VESA_INIT_DES      7
  53. #define KTEXT32_DES        KTEXT_DES
  54.  
  55. #undef GDT_ITEMS
  56. #define GDT_ITEMS  8
  57.  
  58. #endif /* CONFIG_FB */
  59.  
  60. #define gdtselector(des)  ((des) << 3)
  61.  
  62. #define PL_KERNEL  0
  63. #define PL_USER    3
  64.  
  65. #define AR_PRESENT    (1 << 7)
  66. #define AR_DATA       (2 << 3)
  67. #define AR_CODE       (3 << 3)
  68. #define AR_WRITABLE   (1 << 1)
  69. #define AR_INTERRUPT  (0x0e)
  70. #define AR_TSS        (0x09)
  71.  
  72. #define DPL_KERNEL  (PL_KERNEL << 5)
  73. #define DPL_USER    (PL_USER << 5)
  74.  
  75. #define TSS_BASIC_SIZE  104
  76. #define TSS_IOMAP_SIZE  (16 * 1024 + 1)  /* 16K for bitmap + 1 terminating byte for convenience */
  77.  
  78. #define IO_PORTS  (64 * 1024)
  79.  
  80. #ifndef __ASM__
  81.  
  82. #include <arch/types.h>
  83. #include <arch/context.h>
  84.  
  85. typedef struct {
  86.     uint16_t limit;
  87.     uint32_t base;
  88. } __attribute__ ((packed)) ptr_16_32_t;
  89.  
  90. typedef struct {
  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 unused: 1;
  98.     unsigned special: 1;
  99.     unsigned granularity : 1;
  100.     unsigned base_24_31: 8;
  101. } __attribute__ ((packed)) descriptor_t;
  102.  
  103. typedef struct {
  104.     unsigned offset_0_15: 16;
  105.     unsigned selector: 16;
  106.     unsigned unused: 8;
  107.     unsigned access: 8;
  108.     unsigned offset_16_31: 16;
  109. } __attribute__ ((packed)) idescriptor_t;
  110.  
  111. typedef struct {
  112.     uint16_t link;
  113.     unsigned : 16;
  114.     uint32_t esp0;
  115.     uint16_t ss0;
  116.     unsigned : 16;
  117.     uint32_t esp1;
  118.     uint16_t ss1;
  119.     unsigned : 16;
  120.     uint32_t esp2;
  121.     uint16_t ss2;
  122.     unsigned : 16;
  123.     uint32_t cr3;
  124.     uint32_t eip;
  125.     uint32_t eflags;
  126.     uint32_t eax;
  127.     uint32_t ecx;
  128.     uint32_t edx;
  129.     uint32_t ebx;
  130.     uint32_t esp;
  131.     uint32_t ebp;
  132.     uint32_t esi;
  133.     uint32_t edi;
  134.     uint16_t es;
  135.     unsigned : 16;
  136.     uint16_t cs;
  137.     unsigned : 16;
  138.     uint16_t ss;
  139.     unsigned : 16;
  140.     uint16_t ds;
  141.     unsigned : 16;
  142.     uint16_t fs;
  143.     unsigned : 16;
  144.     uint16_t gs;
  145.     unsigned : 16;
  146.     uint16_t ldtr;
  147.     unsigned : 16;
  148.     unsigned : 16;
  149.     uint16_t iomap_base;
  150.     uint8_t iomap[TSS_IOMAP_SIZE];
  151. } __attribute__ ((packed)) tss_t;
  152.  
  153. extern ptr_16_32_t gdtr;
  154. extern ptr_16_32_t bootstrap_gdtr;
  155. extern ptr_16_32_t protected_ap_gdtr;
  156. extern tss_t *tss_p;
  157.  
  158. extern descriptor_t gdt[];
  159.  
  160. extern void pm_init(void);
  161.  
  162. extern void gdt_setbase(descriptor_t *d, uintptr_t base);
  163. extern void gdt_setlimit(descriptor_t *d, uint32_t limit);
  164.  
  165. extern void idt_init(void);
  166. extern void idt_setoffset(idescriptor_t *d, uintptr_t offset);
  167.  
  168. extern void tss_initialize(tss_t *t);
  169. extern void set_tls_desc(uintptr_t tls);
  170.  
  171. #endif /* __ASM__ */
  172.  
  173. #endif
  174.  
  175. /** @}
  176.  */
  177.