kernel/arch/ia32xen/include/pm.h

   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 <typedefs.h>
  73 #include <arch/context.h>
  74
  75 struct ptr_16_32 {
  76         uint16_t limit;
  77         uint32_t base;
  78 } __attribute__ ((packed));
  79 typedef struct ptr_16_32 ptr_16_32_t;
  80
  81 struct descriptor {
  82         unsigned limit_0_15: 16;
  83         unsigned base_0_15: 16;
  84         unsigned base_16_23: 8;
  85         unsigned access: 8;
  86         unsigned limit_16_19: 4;
  87         unsigned available: 1;
  88         unsigned unused: 1;
  89         unsigned special: 1;
  90         unsigned granularity : 1;
  91         unsigned base_24_31: 8;
  92 } __attribute__ ((packed));
  93 typedef struct descriptor  descriptor_t;
  94
  95 struct tss {
  96         uint16_t link;
  97         unsigned : 16;
  98         uint32_t esp0;
  99         uint16_t ss0;
 100         unsigned : 16;
 101         uint32_t esp1;
 102         uint16_t ss1;
 103         unsigned : 16;
 104         uint32_t esp2;
 105         uint16_t ss2;
 106         unsigned : 16;
 107         uint32_t cr3;
 108         uint32_t eip;
 109         uint32_t eflags;
 110         uint32_t eax;
 111         uint32_t ecx;
 112         uint32_t edx;
 113         uint32_t ebx;
 114         uint32_t esp;
 115         uint32_t ebp;
 116         uint32_t esi;
 117         uint32_t edi;
 118         uint16_t es;
 119         unsigned : 16;
 120         uint16_t cs;
 121         unsigned : 16;
 122         uint16_t ss;
 123         unsigned : 16;
 124         uint16_t ds;
 125         unsigned : 16;
 126         uint16_t fs;
 127         unsigned : 16;
 128         uint16_t gs;
 129         unsigned : 16;
 130         uint16_t ldtr;
 131         unsigned : 16;
 132         unsigned : 16;
 133         uint16_t iomap_base;
 134         uint8_t iomap[TSS_IOMAP_SIZE];
 135 } __attribute__ ((packed));
 136 typedef struct tss tss_t;
 137
 138 extern ptr_16_32_t gdtr;
 139 extern ptr_16_32_t bootstrap_gdtr;
 140 extern ptr_16_32_t protected_ap_gdtr;
 141 extern struct tss *tss_p;
 142
 143 extern descriptor_t gdt[];
 144
 145 extern void pm_init(void);
 146
 147 extern void gdt_setbase(descriptor_t *d, uintptr_t base);
 148 extern void gdt_setlimit(descriptor_t *d, uint32_t limit);
 149
 150 extern void traps_init(void);
 151
 152 extern void tss_initialize(tss_t *t);
 153 extern void set_tls_desc(uintptr_t tls);
 154
 155 #endif /* __ASM__ */
 156
 157 #endif
 158
 159 /** @}
 160  */