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| Rev | Author | Line No. | Line |
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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __PM_H__ |
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| 30 | #define __PM_H__ |
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| 31 | |||
| 32 | #include <arch/types.h> |
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| 33 | #include <typedefs.h> |
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| 34 | #include <arch/context.h> |
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| 35 | |||
| 36 | #define IDT_ITEMS 64 |
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| 37 | #define GDT_ITEMS 6 |
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| 38 | |||
| 39 | #define NULL_DES 0 |
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| 40 | #define KTEXT_DES 1 |
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| 41 | #define KDATA_DES 2 |
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| 42 | #define UTEXT_DES 3 |
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| 43 | #define UDATA_DES 4 |
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| 44 | #define TSS_DES 5 |
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| 45 | |||
| 46 | #define selector(des) ((des)<<3) |
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| 47 | |||
| 48 | #define PL_KERNEL 0 |
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| 49 | #define PL_USER 3 |
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| 50 | |||
| 51 | #define AR_PRESENT (1<<7) |
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| 52 | #define AR_DATA (2<<3) |
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| 53 | #define AR_CODE (3<<3) |
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| 54 | #define AR_WRITABLE (1<<1) |
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| 55 | #define AR_INTERRUPT (0xe) |
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| 56 | #define AR_TSS (0x9) |
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| 57 | |||
| 58 | #define DPL_KERNEL (PL_KERNEL<<5) |
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| 59 | #define DPL_USER (PL_USER<<5) |
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| 60 | |||
| 61 | #define IO_MAP_BASE (104) |
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| 62 | |||
| 63 | struct ptr_16_32 { |
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| 64 | __u16 limit; |
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| 65 | __u32 base; |
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| 66 | } __attribute__ ((packed)); |
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| 67 | |||
| 68 | struct descriptor { |
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| 69 | unsigned limit_0_15: 16; |
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| 70 | unsigned base_0_15: 16; |
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| 71 | unsigned base_16_23: 8; |
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| 72 | unsigned access: 8; |
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| 73 | unsigned limit_16_19: 4; |
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| 74 | unsigned available: 1; |
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| 75 | unsigned unused: 1; |
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| 76 | unsigned special: 1; |
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| 77 | unsigned granularity : 1; |
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| 78 | unsigned base_24_31: 8; |
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| 79 | } __attribute__ ((packed)); |
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| 80 | |||
| 81 | struct idescriptor { |
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| 82 | unsigned offset_0_15: 16; |
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| 83 | unsigned selector: 16; |
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| 84 | unsigned unused: 8; |
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| 85 | unsigned access: 8; |
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| 86 | unsigned offset_16_31: 16; |
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| 87 | } __attribute__ ((packed)); |
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| 88 | |||
| 89 | |||
| 90 | struct tss { |
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| 91 | __u16 link; |
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| 92 | unsigned : 16; |
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| 93 | __u32 esp0; |
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| 94 | __u16 ss0; |
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| 95 | unsigned : 16; |
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| 96 | __u32 esp1; |
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| 97 | __u16 ss1; |
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| 98 | unsigned : 16; |
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| 99 | __u32 esp2; |
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| 100 | __u16 ss2; |
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| 101 | unsigned : 16; |
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| 102 | __u32 cr3; |
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| 103 | __u32 eip; |
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| 104 | __u32 eflags; |
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| 105 | __u32 eax; |
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| 106 | __u32 ecx; |
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| 107 | __u32 edx; |
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| 108 | __u32 ebx; |
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| 109 | __u32 esp; |
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| 110 | __u32 ebp; |
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| 111 | __u32 esi; |
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| 112 | __u32 edi; |
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| 113 | __u16 es; |
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| 114 | unsigned : 16; |
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| 115 | __u16 cs; |
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| 116 | unsigned : 16; |
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| 117 | __u16 ss; |
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| 118 | unsigned : 16; |
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| 119 | __u16 ds; |
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| 120 | unsigned : 16; |
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| 121 | __u16 fs; |
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| 122 | unsigned : 16; |
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| 123 | __u16 gs; |
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| 124 | unsigned : 16; |
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| 125 | __u16 ldtr; |
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| 126 | unsigned : 16; |
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| 127 | unsigned : 16; |
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| 128 | __u16 io_map_base; |
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| 129 | } __attribute__ ((packed)); |
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| 130 | |||
| 131 | extern struct ptr_16_32 gdtr; |
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| 132 | extern struct tss *tss_p; |
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| 133 | |||
| 134 | extern struct descriptor gdt[]; |
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| 135 | |||
| 136 | extern void pm_init(void); |
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| 137 | |||
| 138 | extern void gdt_setbase(struct descriptor *d, __address base); |
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| 105 | jermar | 139 | extern void gdt_setlimit(struct descriptor *d, __u32 limit); |
| 1 | jermar | 140 | |
| 141 | extern void idt_init(void); |
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| 142 | extern void idt_setoffset(struct idescriptor *d, __address offset); |
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| 143 | |||
| 144 | extern void tss_initialize(struct tss *t); |
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| 145 | |||
| 146 | #endif |