source: trunk/hal/i386/cpu-internal.h @ 1

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1/*
2 * cpu-internal.h - cpu internal data structures
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#ifndef _CPU_INTERNAL_H_
24#define _CPU_INTERNAL_H_
25
26#include <types.h>
27
28enum
29{
30        GDT_NULL_ENTRY = 0,             /* 0x00 */
31
32        GDT_KTEXT_ENTRY,                /* 0x08 */
33        GDT_KDATA_ENTRY,                /* 0x10 */
34
35        GDT_UTEXT_ENTRY,                /* 0x18 used in cpu_context.c::__cpu_context_init */
36        GDT_UDATA_ENTRY,                /* 0x20 used in cpu_context.c::__cpu_context_init */
37        GDT_UTLS_ENTRY,                 /* 0x28 used in cpu_context.c::__cpu_context_init */
38        GDT_FIXED_NR
39};
40
41/* GDT table entry type */
42struct cpu_gdt_entry_s
43{
44        uint16_t limit_low;
45        uint16_t base_low;
46        uint8_t  base_middle;
47        uint8_t  access;
48        uint8_t  granularity;
49        uint8_t  base_high;
50} __attribute__((packed));
51
52/* GDT pointer type */
53struct cpu_gdt_ptr_s
54{
55        uint16_t limit;
56        uint32_t base;
57} __attribute__((packed));
58
59void cpu_gdt_init();
60void cpu_idt_init();
61
62struct cpu_gdt_entry_s* cpu_get_gdt_entry(int entry);
63struct cpu_gdt_ptr_s*   cpu_get_gdt_ptr(void);
64
65/* IDT table entry type */
66struct cpu_idt_entry_s
67{
68        uint16_t offset_low;
69        uint16_t selector;
70        uint8_t  reserved;
71        uint8_t  flags;
72        uint16_t offset_high;
73} __attribute__((packed));
74
75/* IDT pointer type */
76struct cpu_idt_ptr_s
77{
78        uint16_t limit;
79        uint32_t base;
80} __attribute__((packed));
81
82/* Task State Segment type */
83struct cpu_tss_s
84{
85        uint16_t pred_link;             /* 0 */
86        uint16_t reserved_0;
87 
88        uint32_t esp_r0;                /* 1 */
89        uint16_t ss_r0;                 /* 2 */
90        uint16_t reserved_1;
91 
92        uint32_t esp_r1;                /* 3 */
93        uint16_t ss_r1;                 /* 4 */
94        uint16_t reserved_2;
95 
96        uint32_t esp_r2;                /* 5 */
97        uint16_t ss_r2;                 /* 6 */
98        uint16_t reserved_3;
99
100        uint32_t cr3_pdbr;              /* 7 */
101        uint32_t eip;                   
102        uint32_t eflags;
103
104        uint32_t eax,ecx,edx,ebx;       /* 10 */
105        uint32_t esp,ebp,esi,edi;       /* 14 */
106 
107        uint16_t es, reserved_4;        /* 18 */
108        uint16_t cs, reserved_5;        /* 19 */
109        uint16_t ss, reserved_6;        /* 20 */
110        uint16_t ds, reserved_7;        /* 21 */
111        uint16_t fs, reserved_8;        /* 22 */
112        uint16_t gs, reserved_9;        /* 23 */
113        uint16_t ldt,reserved_10;       /* 24 */
114 
115        uint16_t T:1;                   /* 25 */
116        uint16_t reserved_11:15;
117        uint16_t io_map;
118} __attribute__ ((packed));
119
120
121struct cpu_tss_s* cpu_get_tss(int cpu_id);
122void cpu_set_utls(uint_t addr);
123
124/* CPU Registers */
125struct cpu_regs_s
126{
127        uint_t gs;
128        uint_t fs;
129        uint_t es;
130        uint_t ds;
131        uint_t edi;
132        uint_t esi;
133        uint_t ebp;
134        uint_t esp;
135        uint_t ebx;
136        uint_t edx;
137        uint_t ecx;
138        uint_t eax;
139        uint_t int_nr;
140        uint_t err_code;
141        uint_t ret_eip;
142        uint_t ret_cs;
143        uint_t eflags;
144        uint_t old_esp;
145        uint_t old_ss;
146} __attribute__ ((packed));
147
148
149
150
151
152#endif  /* _CPU_INTERNAL_H_ */
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