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  1. /*
  2.  * Copyright (c) 2006 Martin Decky
  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 ia32xen
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_ia32xen_PM_H_
  36. #define KERN_ia32xen_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. #define selector(des)   ((des) << 3)
  50.  
  51. #define PL_KERNEL   1
  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_INTERRUPT    (0xe)
  59. #define AR_TSS      (0x9)
  60.  
  61. #define DPL_KERNEL  (PL_KERNEL<<5)
  62. #define DPL_USER    (PL_USER<<5)
  63.  
  64. #define TSS_BASIC_SIZE  104
  65. #define TSS_IOMAP_SIZE  (16*1024+1) /* 16K for bitmap + 1 terminating byte for convenience */
  66.  
  67. #define IO_PORTS    (64*1024)
  68.  
  69. #ifndef __ASM__
  70.  
  71. #include <arch/types.h>
  72. #include <arch/context.h>
  73.  
  74. struct ptr_16_32 {
  75.     uint16_t limit;
  76.     uint32_t base;
  77. } __attribute__ ((packed));
  78. typedef struct ptr_16_32 ptr_16_32_t;
  79.  
  80. struct descriptor {
  81.     unsigned limit_0_15: 16;
  82.     unsigned base_0_15: 16;
  83.     unsigned base_16_23: 8;
  84.     unsigned access: 8;
  85.     unsigned limit_16_19: 4;
  86.     unsigned available: 1;
  87.     unsigned unused: 1;
  88.     unsigned special: 1;
  89.     unsigned granularity : 1;
  90.     unsigned base_24_31: 8;
  91. } __attribute__ ((packed));
  92. typedef struct descriptor  descriptor_t;
  93.  
  94. struct tss {
  95.     uint16_t link;
  96.     unsigned : 16;
  97.     uint32_t esp0;
  98.     uint16_t ss0;
  99.     unsigned : 16;
  100.     uint32_t esp1;
  101.     uint16_t ss1;
  102.     unsigned : 16;
  103.     uint32_t esp2;
  104.     uint16_t ss2;
  105.     unsigned : 16;
  106.     uint32_t cr3;
  107.     uint32_t eip;
  108.     uint32_t eflags;
  109.     uint32_t eax;
  110.     uint32_t ecx;
  111.     uint32_t edx;
  112.     uint32_t ebx;
  113.     uint32_t esp;
  114.     uint32_t ebp;
  115.     uint32_t esi;
  116.     uint32_t edi;
  117.     uint16_t es;
  118.     unsigned : 16;
  119.     uint16_t cs;
  120.     unsigned : 16;
  121.     uint16_t ss;
  122.     unsigned : 16;
  123.     uint16_t ds;
  124.     unsigned : 16;
  125.     uint16_t fs;
  126.     unsigned : 16;
  127.     uint16_t gs;
  128.     unsigned : 16;
  129.     uint16_t ldtr;
  130.     unsigned : 16;
  131.     unsigned : 16;
  132.     uint16_t iomap_base;
  133.     uint8_t iomap[TSS_IOMAP_SIZE];
  134. } __attribute__ ((packed));
  135. typedef struct tss tss_t;
  136.  
  137. extern ptr_16_32_t gdtr;
  138. extern ptr_16_32_t bootstrap_gdtr;
  139. extern ptr_16_32_t protected_ap_gdtr;
  140. extern struct tss *tss_p;
  141.  
  142. extern descriptor_t gdt[];
  143.  
  144. extern void pm_init(void);
  145.  
  146. extern void gdt_setbase(descriptor_t *d, uintptr_t base);
  147. extern void gdt_setlimit(descriptor_t *d, uint32_t limit);
  148.  
  149. extern void traps_init(void);
  150.  
  151. extern void tss_initialize(tss_t *t);
  152. extern void set_tls_desc(uintptr_t tls);
  153.  
  154. #endif /* __ASM__ */
  155.  
  156. #endif
  157.  
  158. /** @}
  159.  */
  160.