arch/amd64/include/pm.h

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