C++ Crashkurs
Information about the (extended) Advanced Programmable Interrupt Controller. More...
Enumerations | |
| enum | Device { TIMER = 0 , KEYBOARD = 1 , COM1 = 4 , COM2 = 3 , COM3 = 4 , COM4 = 3 , FLOPPY = 6 , LPT1 = 7 , REALTIMECLOCK = 8 , PS2MOUSE = 12 , IDE1 = 14 , IDE2 = 15 } |
| Historic order of interrupt lines (PIC) More... | |
Functions | |
| bool | init () |
| Executes system detection. More... | |
| uint8_t | getIOAPICSlot (APIC::Device device) |
Returns the pin number the device is connected to. | |
| uintptr_t | getIOAPICAddress () |
| Queries the physical I/O-APIC address determined during system boot. More... | |
| uint8_t | getIOAPICID () |
| Queries of ID of the I/O-APIC determined during system boot. More... | |
| uint8_t | getLogicalAPICID (uint8_t core) |
| Returns the logical ID of the Local APIC passed for core. More... | |
| uint8_t | getLAPICID (uint8_t core) |
| Get the Local APIC ID of a CPU. More... | |
Constants | |
| const uint8_t | INVALID_ID = 0xff |
| Invalid APIC ID. More... | |
Detailed Description
Information about the (extended) Advanced Programmable Interrupt Controller.
Enumeration Type Documentation
| enum APIC::Device |
Historic order of interrupt lines (PIC)
| Enumerator | |
|---|---|
| TIMER | Programmable Interrupt Timer (PIT) |
| KEYBOARD | Keyboard. |
| COM1 | First serial interface. |
| COM2 | Second serial interface. |
| COM3 | Third serial interface (shared with COM1) |
| COM4 | Forth serial interface (shared with COM2) |
| FLOPPY | Floppy device. |
| LPT1 | Printer. |
| REALTIMECLOCK | Real time clock. |
| PS2MOUSE | Mouse. |
| IDE1 | First hard disk. |
| IDE2 | Second hard disk. |
Function Documentation
| bool APIC::init | ( | ) |
Executes system detection.
Searches and evaluates the APIC entries in the ACPI table. This function recognizes a possibly existing multicore system. After successful detection, the number of available CPUs (which is equal to the number of local APICs) ) can be queried using the method Core::count().
- Note
- Called by kernel_init() on BSP
- Returns
trueif detection of the APIC entries was successful
| uintptr_t APIC::getIOAPICAddress | ( | ) |
Queries the physical I/O-APIC address determined during system boot.
- Returns
- Base address of the (first & only supported) I/O APIC
| uint8_t APIC::getIOAPICID | ( | ) |
Queries of ID of the I/O-APIC determined during system boot.
- Returns
- Identification of the (first & only supported) I/O APIC
| uint8_t APIC::getLogicalAPICID | ( | uint8_t | core | ) |
Returns the logical ID of the Local APIC passed for core.
The LAPIC's logical ID is set (by StuBS) during boot such that exactly one bit is set per CPU core. For core 0, bit 0 is set in its ID, while core 1 has bit 1 set, etc.
- Parameters
-
core The queried CPU core
| uint8_t APIC::getLAPICID | ( | uint8_t | core | ) |
Get the Local APIC ID of a CPU.
- Parameters
-
core Query CPU core number
- Returns
- LAPIC ID of CPU or INVALID_ID if invalid CPU ID
Constant Documentation
| const uint8_t APIC::INVALID_ID = 0xff |
Invalid APIC ID.
The highest address is reserved according to xAPIC specification