1 #ifndef __LUNAIX_APIC_H
2 #define __LUNAIX_APIC_H
6 #define APIC_BASE_VADDR 0x1000
7 #define __APIC_BASE_PADDR 0xFEE00000
9 #define IA32_MSR_APIC_BASE 0x1B
10 #define IA32_APIC_ENABLE 0x800
13 * Common APIC memory-mapped registers
14 * Ref: Intel Manual, Vol. 3A, Table 10-1
17 #define APIC_IDR 0x20 // ID Reg
18 #define APIC_VER 0x30 // Version Reg
19 #define APIC_TPR 0x80 // Task Priority
20 #define APIC_APR 0x90 // Arbitration Priority
21 #define APIC_PPR 0xA0 // Processor Priority
22 #define APIC_EOI 0xB0 // End-Of-Interrupt
23 #define APIC_RRD 0xC0 // Remote Read
24 #define APIC_LDR 0xD0 // Local Destination Reg
25 #define APIC_DFR 0xE0 // Destination Format Reg
26 #define APIC_SPIVR 0xF0 // Spurious Interrupt Vector Reg
27 #define APIC_ISR_BASE 0x100 // Base address for In-Service-Interrupt bitmap register (256bits)
28 #define APIC_TMR_BASE 0x180 // Base address for Trigger-Mode bitmap register (256bits)
29 #define APIC_IRR_BASE 0x200 // Base address for Interrupt-Request bitmap register (256bits)
30 #define APIC_ESR 0x280 // Error Status Reg
31 #define APIC_ICR_BASE 0x300 // Interrupt Command
32 #define APIC_LVT_LINT0 0x350
33 #define APIC_LVT_LINT1 0x360
34 #define APIC_LVT_ERROR 0x370
36 // APIC Timer specific
37 #define APIC_TIMER_LVT 0x320
38 #define APIC_TIMER_ICR 0x380 // Initial Count
39 #define APIC_TIMER_CCR 0x390 // Current Count
40 #define APIC_TIMER_DCR 0x3E0 // Divide Configuration
42 #define APIC_SPIV_FOCUS_DISABLE 0x200
43 #define APIC_SPIV_APIC_ENABLE 0x100
44 #define APIC_SPIV_EOI_BROADCAST 0x1000
46 #define LVT_DELIVERY_FIXED 0
47 #define LVT_DELIVERY_NMI (0x4 << 8)
48 #define LVT_TRIGGER_EDGE (0 << 15)
49 #define LVT_TRIGGER_LEVEL (1 << 15)
50 #define LVT_MASKED (1 << 16)
51 #define LVT_TIMER_ONESHOT (0 << 17)
52 #define LVT_TIMER_PERIODIC (1 << 17)
54 // Dividers for timer. See Intel Manual Vol3A. 10-17 (pp. 3207), Figure 10-10
55 #define APIC_TIMER_DIV1 0b1011
56 #define APIC_TIMER_DIV2 0b0000
57 #define APIC_TIMER_DIV4 0b0001
58 #define APIC_TIMER_DIV8 0b0010
59 #define APIC_TIMER_DIV16 0b0011
60 #define APIC_TIMER_DIV32 0b1000
61 #define APIC_TIMER_DIV64 0b1001
62 #define APIC_TIMER_DIV128 0b1010
64 #define APIC_PRIORITY(cls, subcls) (((cls) << 4) | (subcls))
66 #define apic_read_reg(reg) (*(uint32_t*)(APIC_BASE_VADDR + (reg)))
67 #define apic_write_reg(reg, val) (*(uint32_t*)(APIC_BASE_VADDR + (reg)) = (val))
73 * @brief Tell the APIC that the handler for current interrupt is finished.
74 * This will issue a write action to EOI register.
78 apic_done_servicing() {
79 apic_write_reg(APIC_EOI, 0);
82 #endif /* __LUNAIX_APIC_H */