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IBNOS
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IBNOS
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Go to the source code of this file.
Classes | |
| struct | GDTTable |
| struct | GDTEntry |
| struct | IDTTable |
| struct | IDTEntry |
Macros | |
| #define | KERNELSTACK_SIZE PAGE_SIZE |
| #define | USERMODE_KERNELSTACK_ADDRESS 0xFF800000 |
| #define | USERMODE_GDT_ADDRESS 0xFF801000 |
| #define | USERMODE_IDT_ADDRESS 0xFF811000 |
| #define | USERMODE_INTJMP_ADDRESS 0xFF812000 |
| #define | USERMODE_TASK_ADDRESS 0xFF813000 |
| #define | USERMODE_KERNELSTACK_LIMIT (USERMODE_KERNELSTACK_ADDRESS + KERNELSTACK_SIZE) |
| #define | USERMODE_INTJMP_ENABLE_FPU (USERMODE_INTJMP_ADDRESS + 2048) |
GDT Privileges | |
| #define | GDT_CPL_MASK 3 |
| #define | GDT_CPL_RING0 0 |
| #define | GDT_CPL_RING3 3 |
Interrupt types | |
For more information take a look at http://wiki.osdev.org/Interrupt_Descriptor_Table | |
| #define | INT_TYPE_TASK32 0x5 |
| #define | INT_TYPE_INT16 0x6 |
| #define | INT_TYPE_TRAP16 0x7 |
| #define | INT_TYPE_INT32 0xE |
| #define | INT_TYPE_TRAP32 0xF |
GDT Size | |
| #define | GDT_MAX_SIZE 0x10000 |
| #define | GDT_MAX_PAGES ((GDT_MAX_SIZE + PAGE_MASK) >> PAGE_BITS) |
| #define | GDT_MAX_COUNT (GDT_MAX_SIZE / sizeof(struct GDTEntry)) |
IDT Size | |
| #define | IDT_MAX_SIZE PAGE_SIZE |
| #define | IDT_MAX_COUNT 256 |
Functions | |
| struct GDTTable | __attribute__ ((packed)) |
| void | gdtInit () |
| Initializes the GDT, task registers, and sets up everything required for multiprocessing. More... | |
| struct GDTEntry * | gdtGetFreeEntry () |
| Get a free entry in the GDT. More... | |
| uint32_t | gdtGetEntryOffset (struct GDTEntry *entry, uint32_t ring) |
| Determines the offset of a GDT entry. More... | |
| void | gdtEntrySetAddress (struct GDTEntry *entry, uint32_t address) |
| Helper function to set the address inside a GDTEntry. More... | |
| void | gdtEntrySetLimit (struct GDTEntry *entry, uint64_t length) |
| Helper function to set the length inside a GDTEntry. More... | |
| void | gdtReleaseEntry (struct GDTEntry *entry) |
| Mark a GDTEntry as free. More... | |
| uint32_t | tssRunUsermodeThread (struct thread *t) |
| Run a thread. More... | |
| void | __attribute__ ((cdecl)) |
Variables | |
| void * | kernelStack |
| void * | intJmpTable_kernel |
| void * | intJmpTable_user |
| struct GDTEntry * | codeRing0 |
| struct GDTEntry * | dataRing0 |
| struct GDTEntry * | codeRing3 |
| struct GDTEntry * | dataRing3 |
| struct GDTEntry * | kernelTask |
| struct GDTEntry * | usermodeTask |
| uint16_t | limit |
| uint32_t | address |
| uint16_t | limit1 |
| uint16_t | address1 |
| uint8_t | address2 |
| union { | |
| uint8_t access | |
| struct { | |
| uint8_t accessed: 1 | |
| uint8_t readWrite: 1 | |
| uint8_t dc: 1 | |
| uint8_t execute: 1 | |
| uint8_t isSystem: 1 | |
| uint8_t privlevel: 2 | |
| uint8_t present: 1 | |
| } accessBits | |
| }; | |
| uint8_t | limit2 |
| uint8_t | user |
| uint8_t | reserved |
| uint8_t | is32bit |
| uint8_t | granularity |
| uint8_t | address3 |
| uint16_t | addressLow |
| union { | |
| uint16_t csSelector | |
| uint16_t taskSelector | |
| }; | |
| uint8_t | zero |
| union { | |
| uint8_t typeAttr | |
| struct { | |
| uint8_t type: 4 | |
| uint8_t storageSegment: 1 | |
| uint8_t dpl: 2 | |
| uint8_t present: 1 | |
| } typeBits | |
| }; | |
| uint16_t | addressHigh |
| #define USERMODE_INTJMP_ENABLE_FPU (USERMODE_INTJMP_ADDRESS + 2048) |
| #define USERMODE_KERNELSTACK_LIMIT (USERMODE_KERNELSTACK_ADDRESS + KERNELSTACK_SIZE) |
| union { ... } |
| union { ... } |
| union { ... } |
| struct { ... } accessBits |
| struct { ... } typeBits |
1.8.13
