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